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Wang Y, Lei C, Guan W, Shi W, Shen R, Zhang SXA, Yu G. Sustainable, low-cost, high-contrast electrochromic displays via host-guest interactions. Proc Natl Acad Sci U S A 2024; 121:e2401060121. [PMID: 38648475 DOI: 10.1073/pnas.2401060121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 03/02/2024] [Indexed: 04/25/2024] Open
Abstract
Electrochromic (EC) displays with electronically regulating the transmittance of solar radiation offer the opportunity to increase the energy efficiency of the building and electronic products and improve the comfort and lifestyle of people. Despite the unique merit and vast application potential of EC technologies, long-awaited EC windows and related visual content displays have not been fully commercialized due to unsatisfactory production cost, durability, color, and complex fabrication processes. Here we develop a unique EC strategy and system based on the natural host and guest interactions to address the above issues. A completely reusable and sustainable EC device has been fabricated with potential advantages of extremely low cost, ideal user-/environment friendly property, and excellent optical modulation, which is benefited from the extracted biomass EC materials and reusable transparent electrodes involved in the system. The as-prepared EC window and nonemissive transparent display also show comprehensively excellent properties: high transmittance change (>85%), broad spectra modulation covering Ultraviolet (UV), Visible (Vis) to Infrared (IR) ranges, high durability (no attenuation under UV radiation for more than 1.5 mo), low open voltage (0.9 V), excellent reusability (>1,200 cycles) of the device's key components and reversibility (>4,000 cycles) with a large transmittance change, and pleasant multicolor. It is anticipated that unconventional exploration and design principles of dynamic host-guest interactions can provide unique insight into different energy-saving and sustainable optoelectronic applications.
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Affiliation(s)
- Yuyang Wang
- Materials Science and Engineering Program and Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712
| | - Chuxin Lei
- Materials Science and Engineering Program and Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712
| | - Weixin Guan
- Materials Science and Engineering Program and Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712
| | - Wen Shi
- Materials Science and Engineering Program and Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712
| | - Ruipeng Shen
- Key Lab of Supramolecular Structure and Materials, Department of Chemistry, Jilin University, Changchun 1130012, China
| | - Sean Xiao-An Zhang
- Key Lab of Supramolecular Structure and Materials, Department of Chemistry, Jilin University, Changchun 1130012, China
| | - Guihua Yu
- Materials Science and Engineering Program and Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712
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2
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Schwab S, Nelson TF, Mecking S. Chemically Recyclable and Biodegradable Vulcanized Rubber. ACS Sustain Chem Eng 2024; 12:6281-6288. [PMID: 38665800 PMCID: PMC11041115 DOI: 10.1021/acssuschemeng.3c08435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/25/2024] [Accepted: 03/27/2024] [Indexed: 04/28/2024]
Abstract
The cross-linked nature of vulcanized rubbers as used in tire and many other applications prohibits an effective closed-loop mechanical or chemical recycling. Moreover, vulcanization significantly retards the material's biodegradation. Here, we report a recyclable and biodegradable rubber that is generated by the vulcanization of amorphous, unsaturated polyesters. The elastic material can be broken down via solvolysis into the underlying monomers. After removal of the vulcanized repeat units, the saturated monomers, constituting the major share of the material, can be recovered in overall recycling rates exceeding 90%. Respirometric biodegradation experiments by 13CO2 tracking under environmental conditions via the polyesters' diol monomer indicated depolymerization and partial mineralization of the vulcanized polyester rubbers.
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Affiliation(s)
- Simon
T. Schwab
- Chair of Chemical Materials Science,
Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Taylor F. Nelson
- Chair of Chemical Materials Science,
Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Stefan Mecking
- Chair of Chemical Materials Science,
Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
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3
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Qin J, Chen Y, Guo X, Huang Y, Chen G, Zhang Q, He G, Zhu S, Ruan X, Zhu H. Regulation of Hard Segment Cluster Structures for High-performance Poly(urethane-urea) Elastomers. Adv Sci (Weinh) 2024:e2400255. [PMID: 38602431 DOI: 10.1002/advs.202400255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/21/2024] [Indexed: 04/12/2024]
Abstract
Elastomers are widely used in daily life; however, the preparation of degradable and recyclable elastomers with high strength, high toughness, and excellent crack resistance remains a challenging task. In this report, a polycaprolactone-based poly(urethane-urea) elastomer is presented with excellent mechanical properties by optimizing the arrangement of hard segment clusters. It is found that long alkyl chains of the chain extenders lead to small and evenly distributed hard segment clusters, which is beneficial for improving mechanical properties. Together with the multiple hydrogen bond structure and stress-induced crystallization, the obtained elastomer exhibits a high strength of 63.3 MPa, an excellent toughness of 431 MJ m-3 and an outstanding fracture energy of 489 kJ m-2, while maintaining good recyclability and degradability. It is believed that the obtained elastomer holds great promise in various application fields and it contributes to the development of a sustainable society.
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Affiliation(s)
- Jianliang Qin
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, China
| | - Yifei Chen
- School of Chemical Engineering at Panjin, Dalian University of Technology, Panjin, 124221, China
| | - Xiwei Guo
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, China
| | - Yi Huang
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, China
| | - Guoqing Chen
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, China
| | - Qi Zhang
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, China
| | - Gaohong He
- School of Chemical Engineering at Panjin, Dalian University of Technology, Panjin, 124221, China
- State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, School of Chemical Engineering, Dalian University of Technology, Dalian, 116023, China
| | - Shiping Zhu
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, China
| | - Xuehua Ruan
- School of Chemical Engineering at Panjin, Dalian University of Technology, Panjin, 124221, China
| | - He Zhu
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, 518172, China
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4
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Deng Y, Zhang Q, Feringa BL. Dynamic Chemistry Toolbox for Advanced Sustainable Materials. Adv Sci (Weinh) 2024; 11:e2308666. [PMID: 38321810 PMCID: PMC11005721 DOI: 10.1002/advs.202308666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/28/2023] [Indexed: 02/08/2024]
Abstract
Developing dynamic chemistry for polymeric materials offers chemical solutions to solve key problems associated with current plastics. Mechanical performance and dynamic function are equally important in material design because the former determines the application scope and the latter enables chemical recycling and hence sustainability. However, it is a long-term challenge to balance the subtle trade-off between mechanical robustness and dynamic properties in a single material. The rise of dynamic chemistry, including supramolecular and dynamic covalent chemistry, provides many opportunities and versatile molecular tools for designing constitutionally dynamic materials that can adapt, repair, and recycle. Facing the growing social need for developing advanced sustainable materials without compromising properties, recent progress showing how the toolbox of dynamic chemistry can be explored to enable high-performance sustainable materials by molecular engineering strategies is discussed here. The state of the art and recent milestones are summarized and discussed, followed by an outlook toward future opportunities and challenges present in this field.
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Affiliation(s)
- Yuanxin Deng
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Technology130 Meilong RoadShanghai200237China
- Stratingh Institute for Chemistry and Zernike Institute for Advanced MaterialsFaculty of Science and EngineeringUniversity of GroningenNijenborgh 4Groningen9747 AGThe Netherlands
| | - Qi Zhang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Technology130 Meilong RoadShanghai200237China
- Stratingh Institute for Chemistry and Zernike Institute for Advanced MaterialsFaculty of Science and EngineeringUniversity of GroningenNijenborgh 4Groningen9747 AGThe Netherlands
| | - Ben L. Feringa
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research CenterSchool of Chemistry and Technology130 Meilong RoadShanghai200237China
- Stratingh Institute for Chemistry and Zernike Institute for Advanced MaterialsFaculty of Science and EngineeringUniversity of GroningenNijenborgh 4Groningen9747 AGThe Netherlands
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5
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Righetti GIC, Faedi F, Famulari A. Embracing Sustainability: The World of Bio-Based Polymers in a Mini Review. Polymers (Basel) 2024; 16:950. [PMID: 38611207 PMCID: PMC11013738 DOI: 10.3390/polym16070950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/25/2024] [Accepted: 03/28/2024] [Indexed: 04/14/2024] Open
Abstract
The proliferation of polymer science and technology in recent decades has been remarkable, with synthetic polymers derived predominantly from petroleum-based sources dominating the market. However, concerns about their environmental impacts and the finite nature of fossil resources have sparked interest in sustainable alternatives. Bio-based polymers, derived from renewable sources such as plants and microbes, offer promise in addressing these challenges. This review provides an overview of bio-based polymers, discussing their production methods, properties, and potential applications. Specifically, it explores prominent examples including polylactic acid (PLA), polyhydroxyalkanoates (PHAs), and polyhydroxy polyamides (PHPAs). Despite their current limited market share, the growing awareness of environmental issues and advancements in technology are driving increased demand for bio-based polymers, positioning them as essential components in the transition towards a more sustainable future.
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Affiliation(s)
- Grazia Isa C. Righetti
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | | | - Antonino Famulari
- Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
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6
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Zotov V, Vijjamarri S, Mousavi SD, Du G. Poly(silyl ether)s as Degradable and Sustainable Materials: Synthesis and Applications. Molecules 2024; 29:1498. [PMID: 38611778 PMCID: PMC11013004 DOI: 10.3390/molecules29071498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Polymer research is currently focused on sustainable and degradable polymers which are cheap, easy to synthesize, and environmentally friendly. Silicon-based polymers are thermally stable and can be utilized in various applications, such as columns and coatings. Poly(silyl ether)s (PSEs) are an interesting class of silicon-based polymers that are easily hydrolyzed in either acidic or basic conditions due to the presence of the silyl ether Si-O-C bond. Synthetically, these polymers can be formed in several different ways, and the most effective and environmentally friendly synthesis is dehydrogenative cross coupling, where the byproduct is H2 gas. These polymers have a lot of promise in the polymeric materials field due to their sustainability, thermal stability, hydrolytic degradability, and ease of synthesis, with nontoxic byproducts. In this review, we will summarize the synthetic approaches for the PSEs in the recent literature, followed by the properties and applications of these materials. A conclusion and perspective will be provided at the end.
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Affiliation(s)
| | | | | | - Guodong Du
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, ND 58202, USA; (V.Z.); (S.V.)
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7
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Bedarf P, Szabo A, Zanini M, Dillenburger B. Robotic 3D Printing of Geopolymer Foam for Lightweight and Insulating Building Elements. 3D Print Addit Manuf 2024; 11:1-9. [PMID: 38389696 PMCID: PMC10880652 DOI: 10.1089/3dp.2023.0183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Foam 3D printing in construction is a promising manufacturing approach that aims to reduce the amount of material, hazardous labor, and costs in producing lightweight and insulating building parts that can reduce the operational energy in buildings. Research using cement-free mineral foams derived from industrial waste showed great potential in previous studies that reduced the amount of concrete needed in composite structures. This article collates the latest developments in this line of work. It presents the material system with its principal components and the advanced robotic 3D printing setup with a climate-controlled fabrication chamber. Print path schemes and hybrid fabrication methods combining 3D printing and casting are evaluated. Furthermore, the article discusses the effect of different print path schemes on the thermal insulation and compressive strength performance of printed parts. A full-scale final prototype synthesizes these findings and demonstrates the fabrication of modular, lightweight, and insulating construction elements that can be assembled into monolithic wall structures. The advantages and challenges of this novel approach are elaborated on in the conclusions. Finally, the article presents future advancements required to leverage this research as a scalable construction method that can help address the biggest challenges in building low-carbon and energy-efficient structures.
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Affiliation(s)
- Patrick Bedarf
- Department of Architecture, Digital Building Technologies, ETH Zurich, Zurich, Switzerland
| | - Anna Szabo
- Department of Architecture, Digital Building Technologies, ETH Zurich, Zurich, Switzerland
| | | | - Benjamin Dillenburger
- Department of Architecture, Digital Building Technologies, ETH Zurich, Zurich, Switzerland
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8
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Hanafiah ZM, Azmi AR, Wan-Mohtar WAAQI, Olivito F, Golemme G, Ilham Z, Jamaludin AA, Razali N, Halim-Lim SA, Wan Mohtar WHM. Water Quality Assessment and Decolourisation of Contaminated Ex-Mining Lake Water Using Bioreactor Dye-Eating Fungus (BioDeF) System: A Real Case Study. Toxics 2024; 12:60. [PMID: 38251015 PMCID: PMC10818540 DOI: 10.3390/toxics12010060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/04/2024] [Accepted: 01/09/2024] [Indexed: 01/23/2024]
Abstract
The environmental conditions of a lake are influenced by its type and various environmental forces such as water temperature, nutrients content, and longitude and latitude to which it is exposed. Due to population growth and development limits, former mining lakes are being converted to more lucrative land uses like those of recreational zones, agriculture, and livestock. The fungus Ganoderma lucidum has the potential to be utilised as a substitute or to perform synergistic bacteria-coupled functions in efficient contaminated lake water treatment. The purpose of this paper is to evaluate the water quality and water quality index (WQI) of an ex-mining lake named Main Lake in the Paya Indah Wetland, Selangor. Furthermore, the current work simulates the use of a Malaysian fungus in decolourising the contaminated ex-mining lake by the BioDeF system in a 300 mL jar inoculated with 10% (v/v) of pre-grown Ganoderma lucidum pellets for 48 h. According to the results, the lake water is low in pH (5.49 ± 0.1 on average), of a highly intense dark brownish colour (average reading of 874.67 ± 3.7 TCU), and high in iron (Fe) content (3.2422 ± 0.2533 mg/L). The water quality index of the lake was between 54.59 and 57.44, with an average value of 56.45; thus, the water was categorized as Class III, i.e., under-polluted water, according to the Malaysian Department of Environment Water Quality Index (DOE-WQI, DOE 2020). The batch bioreactor BioDeF system significantly reduced more than 90% of the water's colour. The utilization of Ganoderma lucidum as an adsorbent material offers a variety of advantages, as it is easily available and cultivated, and it is not toxic.
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Affiliation(s)
- Zarimah Mohd Hanafiah
- Department of Civil Engineering, Faculty of Engineering and Build Environment, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia;
| | - Ammar Radzi Azmi
- Functional Omics and Bioprocess Development Laboratory, Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia;
| | - Wan Abd Al Qadr Imad Wan-Mohtar
- Functional Omics and Bioprocess Development Laboratory, Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia;
| | - Fabrizio Olivito
- Department of Environmental Engineering, University of Calabria, 87036 Rende, Italy;
| | - Giovanni Golemme
- Department of Environmental Engineering, University of Calabria, 87036 Rende, Italy;
| | - Zul Ilham
- Environmental Science and Management Program, Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia; (Z.I.); (A.A.J.)
| | - Adi Ainurzaman Jamaludin
- Environmental Science and Management Program, Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, Malaysia; (Z.I.); (A.A.J.)
| | - Nadzmin Razali
- Gamuda Land, Menara Gamuda, PJ Trade Centre, No. 8 Jalan PJU 8/8A, Bandar Damansara Perdana, Petaling Jaya 47820, Malaysia
| | - Sarina Abdul Halim-Lim
- Operational and Quality Management Unit, Department of Food Technology, Faculty of Food Science and Technology, University Putra Malaysia, Serdang 43400, Malaysia
| | - Wan Hanna Melini Wan Mohtar
- Department of Civil Engineering, Faculty of Engineering and Build Environment, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Malaysia;
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9
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Mouro C, Gomes AP, Gouveia IC. From Hemp Waste to Bioactive Nanofiber Composites: Deep Eutectic Solvents and Electrospinning in Upcycling Endeavors. Gels 2023; 10:1. [PMID: 38275839 PMCID: PMC10815441 DOI: 10.3390/gels10010001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/11/2023] [Accepted: 12/16/2023] [Indexed: 01/27/2024] Open
Abstract
Natural fibers have attracted increasing interest as an alternative to produce environmentally friendly and sustainable materials. Particularly, hemp fibers have been widely used in various industrial applications due to their extremely unique properties. However, hemp can generate a large amount of agro-waste, and it results in an attractive source of biopolymers for the development of low-cost materials as an alternative to the raw materials and conventional petroleum-based plastics. In addition, deep eutectic solvents (DESs), a new type of truly green solvents, have been shown to remove gums, lignin, and other non-cellulosic components from hemp fibers. Reusing these components dissolved into the DESs to fabricate new materials directly by electrospinning is a very attractive but still unexplored endeavor. Thus, this innovative research to venture new upcycling pathways is focused on the fabrication of composite nanofibers by electrospinning of a gel-based blend of Poly(vinyl alcohol) (PVA) and hemp agro-waste (HW) dissolved into choline chloride (ChCl):Glycerol (1:2) and ChCl:Urea (1:2) DES mixtures. The results obtained revealed that the produced nanofibers displayed uniform appearance with diameters ranging from 257.7 ± 65.6 nm to 380.8 ± 134.0 nm. In addition, the mechanical properties of the electrospun composite nanofibers produced from the gel-based blends of HW dissolved in DESs and PVA (HW-DESs_PVA) were found to be superior, resulting in an enhanced tensile strength and Young's modulus. Furthermore, the incorporation of HW into the nanofibers was able to provide bioactive antioxidant and antibacterial properties. Overall, this study demonstrated a promising, more sustainable, and eco-friendly way to produce electrospun composite nanofibers using HW in a circular economy perspective.
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Affiliation(s)
| | | | - Isabel C. Gouveia
- FibEnTech Research Unit, Faculty of Engineering, University of Beira Interior, 6200-001 Covilhã, Portugal; (C.M.); (A.P.G.)
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10
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Onuh G, Bar-On R, Manor O. Particle Network Self-Assembly of Similar Size Sub-Micron Calcium Alginate and Polystyrene Particles Atop Glass. Macromol Biosci 2023; 23:e2300219. [PMID: 37551162 DOI: 10.1002/mabi.202300219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/03/2023] [Indexed: 08/09/2023]
Abstract
Particle-mediated self-assembly, such as nanocomposites, microstructure formation in materials, and core-shell coating of biological particles, offers precise control over the properties of biological materials for applications in drug delivery, tissue engineering, and biosensing. The assembly of similar-sized calcium alginate (CAG) and polystyrene sub-micron particles is studied in an aqueous sodium nitrate solution as a model for particle-mediated self-assembly of biological and synthetic mixed particle species. The objective is to reinforce biological matrices by incorporating synthetic particles to form hybrid particulate networks with tailored properties. By varying the ionic strength of the suspension, the authors alter the energy barriers for particle attachment to each other and to a glass substrate that result from colloidal surface forces. The particles do not show monotonic adsorption trend to glass with ionic strength. Hence, apart from DLVO theory-van der Waals and electrostatic interactions-the authors further consider solvation and bridging interactions in the analysis of the particulate adsorption-coagulation system. CAG particles, which support lower energy barriers to attachment relative to their counterpart polystyrene particles, accumulate as dense aggregates on the glass substrate. Polystyrene particles adsorb simultaneously as detached particles. At high electrolyte concentrations, where electrostatic repulsion is largely screened, the mixture of particles covers most of the glass substrate; the CAG particles form a continuous network throughout the glass substrate with pockets of polystyrene particles. The particulate structure is correlated with the adjustable energy barriers for particle attachment in the suspension.
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Affiliation(s)
- Gideon Onuh
- Wolfson Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa, 3200003, Israel
| | - Roi Bar-On
- Wolfson Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa, 3200003, Israel
| | - Ofer Manor
- Wolfson Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa, 3200003, Israel
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11
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Smorawska J, Włoch M, Głowińska E. Structure-Property Relationship and Multiple Processing Studies of Novel Bio-Based Thermoplastic Polyurethane Elastomers. Materials (Basel) 2023; 16:6246. [PMID: 37763524 PMCID: PMC10533108 DOI: 10.3390/ma16186246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/31/2023] [Accepted: 09/09/2023] [Indexed: 09/29/2023]
Abstract
Currently, the growing demand for polymeric materials has led to an increased need to develop effective recycling methods. This study focuses on the multiple processing of bio-based thermoplastic polyurethane elastomers (bio-TPUs) as a sustainable approach for polymeric waste management through mechanical recycling. The main objective is to investigate the influence of two reprocessing cycles on selected properties of bio-TPUs. Two series of bio-based TPUs were synthesized via a solvent-free two-step method with the use of hexamethylene diisocyanate or hexamethylene diisocyanate/partially bio-based diisocyanate mixtures, bio-based poly(triamethylene ether) glycol, and bio-based 1,3 propanediol. Both the raw bio-TPUs and those subjected to two reprocessing cycles were examined with respect to their chemical, physical, thermal, thermomechanical, and mechanical properties. The conducted research revealed that reprocessing led to changes in the phase separation between the hard and soft segments, thereby affecting the bio-TPUs' properties. Both series of materials showed similar chemical structures regardless of reprocessing (slight changes were observed in the range of carbonyl peak). The thermal properties of TPUs exhibited slight differences after each reprocessing cycle, but generally, the non-processed and reprocessed bio-TPUs were thermally stable up to about 300 °C. However, significant differences were observed in their mechanical properties. The tensile strength increased to 34% for the twice-reprocessed bio-TPUs, while the elongation at break increased by ca. 200%. On the other hand, the processing cycles resulted in a decrease in the hardness of both bio-TPU series (ca. 3-4 °ShA). As a result, the prepared bio-TPUs exhibited characteristics that were closer to those of the sustainable materials model, promoting the circular economy of plastics, with environmental benefits arising from their recyclability and their high content of bio-based monomers (78.4-78.8 wt.%).
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Affiliation(s)
| | | | - Ewa Głowińska
- Department of Polymers Technology, Faculty of Chemistry, Gdansk University of Technology, 11/12 Gabriel Narutowicza Street, 80-233 Gdansk, Poland; (J.S.); (M.W.)
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12
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Veloso-Fernández A, Ruiz-Rubio L, Yugueros I, Moreno-Benítez MI, Laza JM, Vilas-Vilela JL. Improving the Recyclability of an Epoxy Resin through the Addition of New Biobased Vitrimer. Polymers (Basel) 2023; 15:3737. [PMID: 37765591 PMCID: PMC10537514 DOI: 10.3390/polym15183737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/04/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023] Open
Abstract
In recent decades, the use of thermoset epoxy resins (ER) has spread to countless applications due to their mechanical properties, heat resistance and stability. However, these ERs are neither biodegradable nor recyclable due to their permanent crosslinked networks and usually, they are synthesized from fossil and toxic precursors. Therefore, reducing its consumption is of vital importance to the environment. On the one hand, the solution to the recyclability problems of epoxy resins can be achieved through the use of vitrimers, which have thermoset properties and can be recycled as thermoplastic materials. On the other hand, vitrimers can be made from natural sources, reducing their toxicity. In this work, a sustainable epoxy vitrimer has been efficiently synthesized, VESOV, by curing epoxidized soybean oil (ESO) with a new vanillin-derived Schiff base (VSB) dynamic hardener, aliphatic diamine (1,4-butanediamine, BDA) and using 1,2-dimethylimidazole (DMI) as an accelerator. Likewise, using the same synthesized VSB agent, a commercial epoxy resin has also been cured and characterized as ESO. Finally, different percentages (30, 50 and 70 wt%) of the same ER have been included in the formulation of VESOV, demonstrating that only including 30 wt% of ER in the formulation is able to improve the thermo-mechanical properties, maintaining the VESOV's inherent reprocessability or recyclability. In short, this is the first approach to achieve a new material that can be postulated in the future as a replacement for current commercial epoxy resins, although it still requires a minimum percentage of RE in the formulation, it makes it possible to recycle the material while maintaining good mechanical properties.
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Affiliation(s)
- Antonio Veloso-Fernández
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain; (L.R.-R.); and (J.M.L.); (J.L.V.-V.)
| | - Leire Ruiz-Rubio
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain; (L.R.-R.); and (J.M.L.); (J.L.V.-V.)
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
| | - Imanol Yugueros
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain; (L.R.-R.); and (J.M.L.); (J.L.V.-V.)
| | - M. Isabel Moreno-Benítez
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Orgánica e Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain;
| | - José Manuel Laza
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain; (L.R.-R.); and (J.M.L.); (J.L.V.-V.)
| | - José Luis Vilas-Vilela
- Grupo de Química Macromolecular (LABQUIMAC), Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco UPV/EHU, 48940 Leioa, Spain; (L.R.-R.); and (J.M.L.); (J.L.V.-V.)
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
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13
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Patsidis AC, Souliotis M. End-Of-Use Fly Ash as an Effective Reinforcing Filler in Green Polymer Composites. Polymers (Basel) 2023; 15:3418. [PMID: 37631475 PMCID: PMC10459919 DOI: 10.3390/polym15163418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 07/12/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023] Open
Abstract
The aim of this study is to use fly ash powder in an environmentally friendly matrix, in a novel way, addressing environmental and disposal problems. Fly ash/epoxy composites were prepared and studied varying the filler content. An investigation of structural and morphological characteristics was conducted using of X-ray diffraction patterns and scanning electron microscopy images, which revealed the successful fabrication of composites. Thermomechanical properties were studied via dynamic mechanical analysis and static mechanical tests. The composites exhibited an improved mechanical response. Broadband dielectric spectroscopy was used to investigate the dielectric response of the composite systems over the frequency range from 10-1 to 107 Hz and the temperature range from 30 to 160 °C. The analysis revealed the presence of three relaxation processes in the spectra of the tested systems. Interfacial polarization, the glass-to-rubber transition of the polymer matrix, and the rearrangement of polar side groups along the polymer chain are the processes that occur under a descending relaxation time. It was found that dielectric permittivity increases with filler content. Finally, the influence of filler content and the applied voltage under dc conditions was analyzed to determine the ability of the composites to store and retrieve electric energy. Fly ash improved the efficiency of the storing/retrieving energy of the composites.
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Affiliation(s)
| | - Manolis Souliotis
- Department of Chemical Engineering, University of Western Macedonia, 50132 Kozani, Greece
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14
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Guo X, Liang J, Wang Z, Qin J, Zhang Q, Zhu S, Zhang K, Zhu H. Tough, Recyclable, and Degradable Elastomers for Potential Biomedical Applications. Adv Mater 2023; 35:e2210092. [PMID: 36929503 DOI: 10.1002/adma.202210092] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 02/27/2023] [Indexed: 05/19/2023]
Abstract
Elastomers have many industrial, medical and commercial applications, however, their huge demand raises an important question of how to dispose of the out-of-service elastomers. Ideal elastomers that are concurrently tough, recyclable, and degradable are in urgent need, but their preparation remains a rigorous challenge. Herein, a polycaprolactone (PCL) based polyurethane elastomer is designed and prepared to meet this demand. Owing to the presence of dynamic coordination bond and the occurrence of strain-induced crystallization, the obtained elastomer exhibits a high toughness of ≈372 MJ m-3 and an unprecedented fracture energy of ≈646 kJ m-2 , which is much higher than natural rubber (≈50 MJ m-3 for toughness and ≈10 kJ m-2 for fracture energy). In addition, the elastomer can be recycled at least three times using solvent without losing its mechanical properties and can be degraded by lipase in ≈2 months. Finally, biological experiments demonstrate that the elastomer possesses good biocompatibility and can facilitate wound healing in mice when used as sutures. It is believed that the obtained elastomer meets the requirements for next-generation elastomers and is expected to be used in emerging fields such as biomedicine, flexible electronics, robotics and beyond.
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Affiliation(s)
- Xiwei Guo
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, P. R. China
| | - Jiaheng Liang
- School of Life Science, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Zhifen Wang
- College of Materials Science and Engineering, Hainan University, Haikou, 570228, P. R. China
| | - Jianliang Qin
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, P. R. China
| | - Qi Zhang
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, P. R. China
| | - Shiping Zhu
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, P. R. China
| | - Kun Zhang
- School of Life Science, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - He Zhu
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, P. R. China
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15
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Tan C, Li Q, Yao X, Chen L, Su J, Ng FL, Liu Y, Yang T, Chew Y, Liu CT, DebRoy T. Machine Learning Customized Novel Material for Energy-Efficient 4D Printing. Adv Sci (Weinh) 2023; 10:e2206607. [PMID: 36739604 PMCID: PMC10074080 DOI: 10.1002/advs.202206607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Existing commercial powders for laser additive manufacturing (LAM) are designed for traditional manufacturing methods requiring post heat treatments (PHT). LAM's unique cyclic thermal history induces intrinsic heat treatment (IHT) on materials during deposition, which offers an opportunity to develop LAM-customized new materials. This work customized a novel Fe-Ni-Ti-Al maraging steel assisted by machine learning to leverage the IHT effect for in situ forming massive precipitates during LAM without PHT. Fast precipitation kinetics in steel, tailored intermittent deposition strategy, and the IHT effect facilitate the in situ Ni3 Ti precipitation in the martensitic matrix via heterogeneous nucleation on high-density dislocations. The as-built steel achieves a tensile strength of 1538 MPa and a uniform elongation of 8.1%, which is superior to a wide range of as-LAM-processed high-strength steel. In the current mainstream ex situ 4D printing, the time-dependent evolutions (i.e., property or functionality changes) of a 3D printed structure occur after part formation. This work highlights in situ 4D printing via the synchronous integration of time-dependent precipitation hardening with 3D geometry shaping, which shows high energy efficiency and sustainability. The findings provide insight into developing LAM-customized materials by understanding and utilizing the IHT-materials interaction.
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Affiliation(s)
- Chaolin Tan
- Singapore Institute of Manufacturing TechnologyAgency for Science, Technology and Research (A*STAR)2 Fusionopolis WaySingapore138634Singapore
| | - Qian Li
- Department of Materials Science & EngineeringCity University of Hong KongHong Kong SARChina
| | - Xiling Yao
- Singapore Institute of Manufacturing TechnologyAgency for Science, Technology and Research (A*STAR)2 Fusionopolis WaySingapore138634Singapore
| | - Lequn Chen
- Singapore Institute of Manufacturing TechnologyAgency for Science, Technology and Research (A*STAR)2 Fusionopolis WaySingapore138634Singapore
| | - Jinlong Su
- Singapore Institute of Manufacturing TechnologyAgency for Science, Technology and Research (A*STAR)2 Fusionopolis WaySingapore138634Singapore
| | - Fern Lan Ng
- Singapore Institute of Manufacturing TechnologyAgency for Science, Technology and Research (A*STAR)2 Fusionopolis WaySingapore138634Singapore
| | - Yuchan Liu
- Singapore Institute of Manufacturing TechnologyAgency for Science, Technology and Research (A*STAR)2 Fusionopolis WaySingapore138634Singapore
| | - Tao Yang
- Department of Materials Science & EngineeringCity University of Hong KongHong Kong SARChina
| | - Youxiang Chew
- Singapore Institute of Manufacturing TechnologyAgency for Science, Technology and Research (A*STAR)2 Fusionopolis WaySingapore138634Singapore
| | - Chain Tsuan Liu
- Department of Materials Science & EngineeringCity University of Hong KongHong Kong SARChina
| | - Tarasankar DebRoy
- Department of Materials Science & EngineeringPennsylvania State UniversityUniversity ParkPA 16802United States
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16
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Diaz C, Missirlis D. Amyloid-Based Albumin Hydrogels. Adv Healthc Mater 2023; 12:e2201748. [PMID: 36469813 DOI: 10.1002/adhm.202201748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 10/14/2022] [Indexed: 12/08/2022]
Abstract
Amyloid fibrils may serve as building blocks for the preparation of novel hydrogel materials from abundant, low-cost, and biocompatible polypeptides. This work presents the formation of physically cross-linked, self-healing hydrogels based on bovine serum albumin at room temperature through a straightforward disulfide reduction step induced by tris (2-carboxyethyl) phosphine hydrochloride. The structure and surface charge of the amyloid-like fibrils is determined by the pH of the solution during self-assembly, giving rise to hydrogels with distinct physicochemical properties. The hydrogel surface can be readily functionalized with the extracellular matrix protein fibronectin and supports cell adhesion, spreading, and long-term culture. This study offers a simple, versatile, and inexpensive method to prepare amyloid-based albumin hydrogels with potential applications in the biomedical field.
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Affiliation(s)
- Carolina Diaz
- Department of Cellular Biophysics, Max-Planck-Institute for Medical Research, Jahnstr. 29, 69120, Heidelberg, Germany.,Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, UNLP - CONICET, CC16 Suc 4 (1900), La Plata, Buenos Aires, 1900, Argentina
| | - Dimitris Missirlis
- Department of Cellular Biophysics, Max-Planck-Institute for Medical Research, Jahnstr. 29, 69120, Heidelberg, Germany
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17
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Aigaje E, Riofrio A, Baykara H. Processing, Properties, Modifications, and Environmental Impact of Nanocellulose/Biopolymer Composites: A Review. Polymers (Basel) 2023; 15:polym15051219. [PMID: 36904460 PMCID: PMC10006885 DOI: 10.3390/polym15051219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/15/2023] [Accepted: 02/16/2023] [Indexed: 03/06/2023] Open
Abstract
The increasing concerns about plastic pollution and climate change have encouraged research into bioderived and biodegradable materials. Much attention has been focused on nanocellulose due to its abundance, biodegradability, and excellent mechanical properties. Nanocellulose-based biocomposites are a viable option to fabricate functional and sustainable materials for important engineering applications. This review addresses the most recent advances in composites, with a particular focus on biopolymer matrices such as starch, chitosan, polylactic acid, and polyvinyl alcohol. Additionally, the effects of the processing methods, the influence of additives, and the outturn of nanocellulose surface modification on the biocomposite's properties are outlined in detail. Moreover, the change in the composites' morphological, mechanical, and other physiochemical properties due to reinforcement loading is reviewed. Further, mechanical strength, thermal resistance, and the oxygen-water vapor barrier properties are enhanced with the incorporation of nanocellulose into biopolymer matrices. Furthermore, the life cycle assessment of nanocellulose and composites were considered to analyze their environmental profile. The sustainability of this alternative material is compared through different preparation routes and options.
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Affiliation(s)
- Elizabeth Aigaje
- Facultad de Ingeniería Mecánica y Ciencias de la Producción, Escuela Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo, Km 30.5 Vía Perimetral, Guayaquil 090506, Ecuador
- Correspondence: (E.A.); (H.B.)
| | - Ariel Riofrio
- Center of Nanotechnology Research and Development (CIDNA), Escuela Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo, Km 30.5 Vía Perimetral, Guayaquil 090506, Ecuador
| | - Haci Baykara
- Facultad de Ingeniería Mecánica y Ciencias de la Producción, Escuela Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo, Km 30.5 Vía Perimetral, Guayaquil 090506, Ecuador
- Center of Nanotechnology Research and Development (CIDNA), Escuela Superior Politécnica del Litoral, ESPOL, Campus Gustavo Galindo, Km 30.5 Vía Perimetral, Guayaquil 090506, Ecuador
- Correspondence: (E.A.); (H.B.)
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18
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Thakur CK, Karthikeyan C, Abou-Dahech MS, Altabakha MMAM, Al Shahwan MJS, Ashby CR, Tiwari AK, Babu RJ, Moorthy NSHN. Microwave-Assisted Functionalization of Multi-Walled Carbon Nanotubes for Biosensor and Drug Delivery Applications. Pharmaceutics 2023; 15:pharmaceutics15020335. [PMID: 36839659 PMCID: PMC9962829 DOI: 10.3390/pharmaceutics15020335] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/09/2023] [Accepted: 01/13/2023] [Indexed: 01/21/2023] Open
Abstract
Microwave-assisted synthetic methods have emerged as a popular technique for surface modification and the functionalization of multi-walled carbon nanotubes (MWCNTs) for diverse drug delivery applications. Microwave-induced functionalization of MWCNTs provides a high functionalization and requires less time than conventional techniques. Microwave methods are simple, fast, and effective for the covalent and noncovalent conjugation of MWCNTs with various biomolecules and polymers. The present review focuses on the synthetic and drug delivery applications of microwave irradiation techniques (MITs) for the functionalization of MWCNTs, using amino acids and other molecular frameworks containing amino groups, vitamins, proteins, epoxy moieties, metal nanoparticles, and polymers.
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Affiliation(s)
- Chanchal Kiran Thakur
- Cancept Therapeutics Laboratory, Department of Pharmacy, Indira Gandhi National Tribal University, Lalpur, Amarkantak 484887, Madhya Pradesh, India
| | - Chandrabose Karthikeyan
- Cancept Therapeutics Laboratory, Department of Pharmacy, Indira Gandhi National Tribal University, Lalpur, Amarkantak 484887, Madhya Pradesh, India
| | - Mariam Sami Abou-Dahech
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH 43614, USA
| | - Moawia Mohd A. M. Altabakha
- Department of Pharmaceutical Sciences, College of Pharmacy, Ajman University, Ajman P.O. Box 346, United Arab Emirates
- Center of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman P.O. Box 346, United Arab Emirates
| | - Moayad Jamal Saeed Al Shahwan
- Department of Pharmaceutical Sciences, College of Pharmacy, Ajman University, Ajman P.O. Box 346, United Arab Emirates
- Center of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman P.O. Box 346, United Arab Emirates
| | - Charles R. Ashby
- Department of Pharmaceutical Sciences, College of Pharmacy, St. John’s University, New York, NY 11431, USA
| | - Amit K. Tiwari
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH 43614, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, Ajman University, Ajman P.O. Box 346, United Arab Emirates
- Department of Cancer Biology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH 43614, USA
| | - R. Jayachandra Babu
- Department of Drug Discovery & Development, Harrison School of Pharmacy, Auburn University, Auburn, AL 36849, USA
- Correspondence: (R.J.B.); (N.S.H.N.M.)
| | - Narayana Subbiah Hari Narayana Moorthy
- Cancept Therapeutics Laboratory, Department of Pharmacy, Indira Gandhi National Tribal University, Lalpur, Amarkantak 484887, Madhya Pradesh, India
- Correspondence: (R.J.B.); (N.S.H.N.M.)
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19
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Infurna G, Caruso G, Dintcheva NT. Sustainable Materials Containing Biochar Particles: A Review. Polymers (Basel) 2023; 15. [PMID: 36679224 DOI: 10.3390/polym15020343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/30/2022] [Accepted: 01/03/2023] [Indexed: 01/11/2023] Open
Abstract
The conversion of polymer waste, food waste, and biomasses through thermochemical decomposition to fuels, syngas, and solid phase, named char/biochar particles, gives a second life to these waste materials, and this process has been widely investigated in the last two decades. The main thermochemical decomposition processes that have been explored are slow, fast, and flash pyrolysis, torrefaction, gasification, and hydrothermal liquefaction, which produce char/biochar particles that differ in their chemical and physical properties, i.e., their carbon-content, CHNOS compositions, porosity, and adsorption ability. Currently, the main proposed applications of the char/biochar particles are in the agricultural sector as fertilizers for soil retirement and water treatment, as well as use as high adsorption particles. Therefore, according to recently published papers, char/biochar particles could be successfully considered for the formulation of sustainable polymer and biopolymer-based composites. Additionally, in the last decade, these particles have also been proposed as suitable fillers for asphalts. Based on these findings, the current review gives a critical overview that highlights the advantages in using these novel particles as suitable additives and fillers, and at the same time, it shows some drawbacks in their use. Adding char/biochar particles in polymers and biopolymers significantly increases their elastic modulus, tensile strength, and flame and oxygen resistance, although composite ductility is significantly penalized. Unfortunately, due to the dark color of the char/biochar particles, all composites show brown-black coloration, and this issue limits the applications.
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20
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Bayan MF, Jaradat A, Alyami MH, Naser AY. Smart Pellets for Controlled Delivery of 5-Fluorouracil. Molecules 2022; 28. [PMID: 36615499 DOI: 10.3390/molecules28010306] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/20/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023]
Abstract
This work aimed to develop a new one-pot and readily scaled-up formulation capable of retaining 5-fluorouracil and prolonging its release to obtain a site-specific medication delivery for the potential treatment of colorectal cancer. Six polymer-based formulations were successfully produced using a thermal bulk polymerization method and loaded with 5-fluorouracil, which is a chemotherapeutic agent used in the treatment of colorectal carcinoma. The pellets produced were characterized by measuring the glass transition temperature, tensile strength, Young's modulus, and tensile elongation at break. Studies on in vitro swelling and release were carried out in phosphate-buffered saline to evaluate the behaviour of the developed system. The Young's modulus, glass transition temperature, and tensile strength all increased significantly as the crosslinker concentration increased, but the fracture strain value reduced significantly. The in vitro swelling profile of the produced formulations was significantly reduced by increasing crosslinking density. Less than 27% cumulative drug release was achieved for all formulations after 5 h of starting the release study. The highest cumulative drug release reached after 24 h was 69%. The developed drug delivery system demonstrated the ability to delay the release of 5-fluorouracil in upper gastrointestinal tract-mimicking conditions, while permitting its release in a controlled way afterward, which makes it promising for the potential delivery of 5-fluorouracil to the colon.
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21
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Abstract
The piezoelectric effect has been widely observed in biological systems, and its applications in biomedical field are emerging. Recent advances of wearable and implantable biomedical devices bring promise as well as requirements for the piezoelectric materials building blocks. Owing to their biocompatibility, biosafety, and environmental sustainability, natural piezoelectric biomaterials are known as a promising candidate in this emerging field, with a potential to replace conventional piezoelectric ceramics and synthetic polymers. Herein, we provide a thorough review of recent progresses of research on five major types of piezoelectric biomaterials including amino acids, peptides, proteins, viruses, and polysaccharides. Our discussion focuses on their structure- and phase-related piezoelectric properties and fabrication strategies to achieve desired piezoelectric phases. We compare and analyze their piezoelectric performance and further introduce and comment on the approaches to improve their piezoelectric property. Representative biomedical applications of this group of functional biomaterials including energy harvesting, sensing, and tissue engineering are also discussed. We envision that molecular-level understanding of the piezoelectric effect, piezoelectric response improvement, and large-scale manufacturing are three main challenges as well as research and development opportunities in this promising interdisciplinary field.
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Affiliation(s)
- Ruoxing Wang
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Jiajie Sui
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Xudong Wang
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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22
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Pescari S, Budau L, Ciubotaru R, Stoian V. Sustainability Study of Concrete Blocks with Wood Chips Used in Structural Walls in Seismic Areas. Materials (Basel) 2022; 15:6659. [PMID: 36234001 PMCID: PMC9572279 DOI: 10.3390/ma15196659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/19/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
The concept of sustainability has become a priority in the construction field, in a context where there is an increasing discussion about reducing carbon dioxide emissions, as the construction industry is one of the most polluting industries with a focus on the production of building materials. At present, the classic solution used for structural masonry walls worldwide is the ceramic block. Given that the production of ceramic blocks represents an environmentally polluting process, the alternative solution of using concrete blocks with wood chips is proposed. The proposed solution is more environmentally friendly, both in terms of production technology and materials used, as it is made of wood chips, wood being a sustainable material. These types of blocks are currently used in non-seismic areas due to their poor structural performance. This paper deals with a study on the use of recyclable materials, such as wood chips, from waste materials and aims to propose viable solutions for the use of this type of blocks for structural walls in seismic areas. Two solutions, including concrete blocks with wood chips, have been proposed and numerical analyses have been carried out. Numerical analyses were also carried out for the classical solutions, so that, finally, a comparison could be made between them from a structural point of view. Following the numerical analysis of four types of walls, the two proposed solutions of concrete blocks with wood chips had the best results in terms of force-displacement relationship. Moreover, the quantitative results are presented in a force-displacement graph for the four wall types. This stage represents the first phase of the research, while phase II will continue with experimental tests of the proposed solutions.
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23
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Xia D, Sakaushi K, Lyalin A, Wada K, Kumar S, Amores M, Maeda H, Sasaki S, Taketsugu T, Nishihara H. Superior Multielectron-Transferring Energy Storage by π-d Conjugated Frameworks. Small 2022; 18:e2202861. [PMID: 35766308 DOI: 10.1002/smll.202202861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Indexed: 06/15/2023]
Abstract
Reversible multielectron-transfer materials are of considerable interest because of the potential impact to advance present electrochemical energy storage technology by boosting energy density. To date, a few oxide-based materials can reach an electron-transfer number per metal-cation (eM ) larger than 2 upon a (de)intercalation mechanism. However, these materials suffer from degradation due to irreversible rearrangements of the cation-oxygen bonds, and are based on precious metals, for example, Ir and Ru. Hence, a design of the non-oxide-based reversible multielectron-transfer materials with abundant elements can provide a promising alternative. Herein, it is demonstrated that the bis(diimino)copper framework can show eM = 3.5 with cation/anion co-redox mechanism together with a dual-ion mechanism. In this study, the role of the cation-anion interactions is unveiled by using an experiment/theory collaboration applied to a series of the model non-oxide abundant electrode systems based on different metal-nitrogen bonds. These models provide designer multielectron-transfer due to the tunable π-d conjugated electronic structures. It is found that the Cu-nitrogen bonds show a unique reversible rearrangement upon Li-intercalation, and this process responds to acquire a significant reversible multielectron-transfer. This work provides new insights into the affordable multielectron-transfer electrodes and uncovers an alternative strategy to advance the electrochemical energy storage reactions.
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Affiliation(s)
- Dong Xia
- Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Ken Sakaushi
- Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Andrey Lyalin
- Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, 001-0021, Japan
| | - Keisuke Wada
- Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Department of Chemistry, School of Science, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Sonu Kumar
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, 001-0021, Japan
| | - Marco Amores
- Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Department of Chemistry, School of Science, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hiroaki Maeda
- Department of Chemistry, School of Science, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Sono Sasaki
- Faculty of Fiber Science and Engineering, Kyoto Institute of Technology, Matsugasaki Hashikami-cho 1, Sakyo-ku, Kyoto, 606-8585, Japan
- SPring-8 Center, RIKEN, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan
| | - Tetsuya Taketsugu
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, 001-0021, Japan
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
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Amin MN, Ahmad W, Khan K, Ahmad A. A Comprehensive Review of Types, Properties, Treatment Methods and Application of Plant Fibers in Construction and Building Materials. Materials (Basel) 2022; 15:4362. [PMID: 35744418 DOI: 10.3390/ma15124362] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/13/2022] [Accepted: 06/15/2022] [Indexed: 12/13/2022]
Abstract
Sustainable development involves the usage of alternative sustainable materials in order to sustain the excessive depletion of natural resources. Plant fibers, as a “green” material, are progressively gaining the attention of various researchers in the field of construction for their potential use in composites for stepping towards sustainable development. This study aims to provide a scientometric review of the summarized background of plant fibers and their applications as construction and building materials. Studies from the past two decades are summarized. Quantitative assessment of research progress is made by using connections and maps between bibliometric data that are compiled for the analysis of plant fibers using Scopus. Data refinement techniques are also used. Plant fibers are potentially used to enhance the mechanical properties of a composite. It is revealed from the literature that plant-fiber-reinforced composites have comparable properties in comparison to composites reinforced with artificial/steel fibers for civil engineering applications, such as construction materials, bridge piers, canal linings, soil reinforcement, pavements, acoustic treatment, insulation materials, etc. However, the biodegradable nature of plant fibers is still a hindrance to their application as a structural material. For this purpose, different surface and chemical treatment methods have been proposed in past studies to improve their durability. It can be surmised from the gathered data that the compressive and flexural strengths of plant-fiber-reinforced cementitious composites are increased by up to 43% and 67%, respectively, with respect to a reference composite. In the literature, alkaline treatment has been reported as an effective and economical method for treating plant fibers. Environmental degradation due to excessive consumption of natural resources and fossil fuels for the construction industry, along with the burning of waste plant fibers, can be reduced by incorporating said fibers in cementitious composites to reduce landfill pollution and, ultimately, achieve sustainable development.
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Garemark J, Perea-Buceta JE, Rico del Cerro D, Hall S, Berke B, Kilpeläinen I, Berglund LA, Li Y. Nanostructurally Controllable Strong Wood Aerogel toward Efficient Thermal Insulation. ACS Appl Mater Interfaces 2022; 14:24697-24707. [PMID: 35511115 PMCID: PMC9164199 DOI: 10.1021/acsami.2c04584] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 04/22/2022] [Indexed: 06/14/2023]
Abstract
Eco-friendly materials with superior thermal insulation and mechanical properties are desirable for improved energy- and space-efficiency in buildings. Cellulose aerogels with structural anisotropy could fulfill these requirements, but complex processing and high energy demand are challenges for scaling up. Here we propose a scalable, nonadditive, top-down fabrication of strong anisotropic aerogels directly from wood with excellent, near isotropic thermal insulation functions. The aerogel was obtained through cell wall dissolution and controlled precipitation in lumen, using an ionic liquid (IL) mixture comprising DMSO and a guanidinium phosphorus-based IL [MTBD][MMP]. The wood aerogel shows a unique structure with lumen filled with nanofibrils network. In situ formation of a cellulosic nanofibril network in the lumen results in specific surface areas up to 280 m2/g and high yield strengths >1.2 MPa. The highly mesoporous structure (average pore diameter ∼20 nm) of freeze-dried wood aerogels leads to low thermal conductivities in both the radial (0.037 W/mK) and axial (0.057 W/mK) directions, showing great potential as scalable thermal insulators. This synthesis route is energy efficient with high nanostructural controllability. The unique nanostructure and rare combination of strength and thermal properties set the material apart from comparable bottom-up aerogels. This nonadditive synthesis approach is believed to contribute significantly toward large-scale design and structure control of biobased aerogels.
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Affiliation(s)
- Jonas Garemark
- Wallenberg
Wood Science Center, Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden
| | - Jesus E. Perea-Buceta
- Department
of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00560 Helsinki, Finland
| | - Daniel Rico del Cerro
- Department
of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00560 Helsinki, Finland
| | - Stephen Hall
- Lund
University, Division of Solid Mechanics, SE-221 00 Lund, Sweden
| | - Barbara Berke
- Department
of Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - Ilkka Kilpeläinen
- Department
of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00560 Helsinki, Finland
| | - Lars A. Berglund
- Wallenberg
Wood Science Center, Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden
| | - Yuanyuan Li
- Wallenberg
Wood Science Center, Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden
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26
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Roumeli E, Hendrickx R, Bonanomi L, Vashisth A, Rinaldi K, Daraio C. Biological matrix composites from cultured plant cells. Proc Natl Acad Sci U S A 2022; 119:e2119523119. [PMID: 35377816 DOI: 10.1073/pnas.2119523119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We present an approach to fabricate biological matrix composites made entirely from cultured plant cells. We utilize the cell’s innate ability to synthesize nanofibrillar cell walls, which serve as the composite’s fundamental building blocks. Following a controlled compression/dehydration process, the cells arrange into lamellar structures with hierarchical features. We demonstrate that the native cell wall nanofibrils tether adjacent cells together through fibrillar interlocking and intermolecular hydrogen bonding. These interactions facilitate intercellular adhesion and eliminate the need for other binders. Our fabrication process utilizes the entire plant cell, grown in an in vitro culture; requires no harsh chemical treatments or waste-generating extraction or selection processes; and leads to bulk biocomposites that can be produced in situ and biodegrade in soil. The final mechanical properties are comparable to commodity plastics and can be further modulated by introducing filler particles.
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27
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Hajiali F, Jin T, Yang G, Santos M, Lam E, Moores A. Mechanochemical Transformations of Biomass into Functional Materials. ChemSusChem 2022; 15:e202102535. [PMID: 35137539 DOI: 10.1002/cssc.202102535] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Biomass is one of the promising alternatives to petroleum-derived materials and plays a major role in our fight against climate change by providing renewable sources of chemicals and materials. Owing to its chemical and structural complexity, the transformation of biomass into value-added products requires a profound understanding of its composition at different scales and innovative methods such as combining physical and chemical processes. In this context, the use of mechanochemistry in biomass valorization is currently growing owing to its potentials as an efficient, sustainable, and environmentally friendly approach. This review highlights the latest advances in the transformation of biomass (i. e., chitin, cellulose, hemicellulose, lignin, and starch) to functional materials using mechanochemical-assisted methods. We focused here on the methodology of biomass processing, influencing factors, and resulting properties with an emphasis on achieving functional materials rather than breaking down the biopolymer chains into smaller molecules. Opportunities and limitations associated this methodology were discussed accordingly for future directions.
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Affiliation(s)
- Faezeh Hajiali
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, H3A 0B8, Canada
| | - Tony Jin
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, H3A 0B8, Canada
| | - Galen Yang
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, H3A 0B8, Canada
| | - Madison Santos
- Department of Bioengineering, McGill University, 3480 University St., Montreal, Quebec, H3A 0E9, Canada
| | - Edmond Lam
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, H3A 0B8, Canada
- Aquatic and Crop Resource Development Research Centre, National Research Council of Canada, 6100 Royalmount Avenue, Montreal, Quebec, H4P 2R2, Canada
| | - Audrey Moores
- Centre in Green Chemistry and Catalysis, Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec, H3A 0B8, Canada
- Department of Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec, H3A 0 C5, Canada
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28
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Lima AC, Pereira N, Ribeiro C, Lanceros-Mendez S, Martins P. Greener Solvent-Based Processing of Magnetoelectric Nanocomposites. ACS Sustain Chem Eng 2022; 10:4122-4132. [PMID: 36573099 PMCID: PMC9782490 DOI: 10.1021/acssuschemeng.1c06967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Polymer-based magnetoelectric (ME) nanocomposites are an enabling material technology for a wide range of applications in the area of digitalization strategies. Due to its highest piezoelectric response among polymers, poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) is the piezoelectric matrix most used in polymer-based ME materials with over 80% of the total reports, with the resulting composites typically processed from solutions with N,N-dimethylformamide (DMF), a toxic solvent. Nevertheless, environmentally friendlier approaches and sustainable technologies are increasingly being required. This work demonstrates that P(VDF-TrFE)/Co2Fe2O4 nanocomposites can be successfully prepared from solution using three different environmentally friendlier solvents: dimethyl sulfoxide (DMSO), N,N'-dimethylpropyleneurea (DMPU), and triethyl phosphate (TEP) with different dipole moments. It is shown that the prepared composite films, with a maximum ME voltage coefficient of 35 mV cm-1 Oe-1 and a maximum sensitivity of 2.2 mV T-1, are suitable for applications, highlighting the path for a new generation of more sustainable ME sensors.
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Affiliation(s)
- A. C. Lima
- Physics
Centre of Minho and Porto Universities (CF-UM-UP), Universidade do Minho, 4710-057 Braga, Portugal
- INL-International
Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal
| | - N. Pereira
- Physics
Centre of Minho and Porto Universities (CF-UM-UP), Universidade do Minho, 4710-057 Braga, Portugal
| | - C. Ribeiro
- Physics
Centre of Minho and Porto Universities (CF-UM-UP), Universidade do Minho, 4710-057 Braga, Portugal
- CEB-Centre
of Biological Engineering, University of
Minho, 4710-057 Braga, Portugal
| | - S. Lanceros-Mendez
- BCMaterials,
Basque Center for Materials, Applications
and Nanostructures, UPV/EHU
Science Park, 48940 Leioa, Spain
- IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain
| | - P. Martins
- Physics
Centre of Minho and Porto Universities (CF-UM-UP), Universidade do Minho, 4710-057 Braga, Portugal
- IB-S
Institute of Science and Innovation for Sustainability, Universidade do Minho, 4710-057 Braga, Portugal
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29
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Wang Q, Ahmad W, Ahmad A, Aslam F, Mohamed A, Vatin NI. Application of Soft Computing Techniques to Predict the Strength of Geopolymer Composites. Polymers (Basel) 2022; 14:polym14061074. [PMID: 35335405 PMCID: PMC8956037 DOI: 10.3390/polym14061074] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/24/2022] [Accepted: 02/26/2022] [Indexed: 11/17/2022] Open
Abstract
Geopolymers may be the best alternative to ordinary Portland cement because they are manufactured using waste materials enriched in aluminosilicate. Research on geopolymer composites is accelerating. However, considerable work, expense, and time are needed to cast, cure, and test specimens. The application of computational methods to the stated objective is critical for speedy and cost-effective research. In this study, supervised machine learning approaches were employed to predict the compressive strength of geopolymer composites. One individual machine learning approach, decision tree, and two ensembled machine learning approaches, AdaBoost and random forest, were used. The coefficient correlation (R2), statistical tests, and k-fold analysis were used to determine the validity and comparison of all models. It was discovered that ensembled machine learning techniques outperformed individual machine learning techniques in forecasting the compressive strength of geopolymer composites. However, the outcomes of the individual machine learning model were also within the acceptable limit. R2 values of 0.90, 0.90, and 0.83 were obtained for AdaBoost, random forest, and decision models, respectively. The models’ decreased error values, such as mean absolute error, mean absolute percentage error, and root-mean-square errors, further confirmed the ensembled machine learning techniques’ increased precision. Machine learning approaches will aid the building industry by providing quick and cost-effective methods for evaluating material properties.
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Affiliation(s)
- Qichen Wang
- Department of Civil and Environmental Engineering, University of Iowa, Iowa City, IA 52242, USA
- Correspondence: (Q.W.); (W.A.)
| | - Waqas Ahmad
- Department of Civil Engineering, COMSATS University Islamabad, Abbottabad 22060, Pakistan;
- Correspondence: (Q.W.); (W.A.)
| | - Ayaz Ahmad
- Department of Civil Engineering, COMSATS University Islamabad, Abbottabad 22060, Pakistan;
- Faculty of Civil Engineering, Cracow University of Technology, 24 Warszawska Str., 31-155 Cracow, Poland
| | - Fahid Aslam
- Department of Civil Engineering, College of Engineering in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
| | - Abdullah Mohamed
- Research Centre, Future University in Egypt, New Cairo 11745, Egypt;
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30
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Qureshi S, Stojanović GM, Simić M, Jeoti V, Lashari N, Sher F. Silver Conductive Threads-Based Embroidered Electrodes on Textiles as Moisture Sensors for Fluid Detection in Biomedical Applications. Materials (Basel) 2021; 14:7813. [PMID: 34947407 PMCID: PMC8707788 DOI: 10.3390/ma14247813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 12/11/2021] [Accepted: 12/13/2021] [Indexed: 01/03/2023]
Abstract
Wearable sensors have become part of our daily life for health monitoring. The detection of moisture content is critical for many applications. In the present research, textile-based embroidered sensors were developed that can be integrated with a bandage for wound management purposes. The sensor comprised an interdigitated electrode embroidered on a cotton substrate with silver-tech 150 and HC 12 threads, respectively, that have silver coated continuous filaments and 100% polyamide with silver-plated yarn. The said sensor is a capacitive sensor with some leakage. The change in the dielectric constant of the substrate as a result of moisture affects the value of capacitance and, thus, the admittance of the sensor. The moisture sensor's operation is verified by measuring its admittance at 1 MHz and the change in moisture level (1-50) µL. It is observed that the sensitivity of both sensors is comparable. The identically fabricated sensors show similar response and sensitivity while wash test shows the stability of sensor after washing. The developed sensor is also able to detect the moisture caused by both artificial sweat and blood serum, which will be of value in developing new sensors tomorrow for smart wound-dressing applications.
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Affiliation(s)
- Saima Qureshi
- Faculty of Technical Sciences, University of Novi Sad, T. Dositeja Obradovića 6, 21000 Novi Sad, Serbia; (G.M.S.); (M.S.); (V.J.)
| | - Goran M. Stojanović
- Faculty of Technical Sciences, University of Novi Sad, T. Dositeja Obradovića 6, 21000 Novi Sad, Serbia; (G.M.S.); (M.S.); (V.J.)
| | - Mitar Simić
- Faculty of Technical Sciences, University of Novi Sad, T. Dositeja Obradovića 6, 21000 Novi Sad, Serbia; (G.M.S.); (M.S.); (V.J.)
| | - Varun Jeoti
- Faculty of Technical Sciences, University of Novi Sad, T. Dositeja Obradovića 6, 21000 Novi Sad, Serbia; (G.M.S.); (M.S.); (V.J.)
| | - Najeebullah Lashari
- Department of Petroleum Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak Darul Ridzuan, Malaysia;
| | - Farooq Sher
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK
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31
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Vaid R, Yildirim E, Pasquinelli MA, King MW. Hydrolytic Degradation of Polylactic Acid Fibers as a Function of pH and Exposure Time. Molecules 2021; 26:molecules26247554. [PMID: 34946629 PMCID: PMC8706057 DOI: 10.3390/molecules26247554] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/19/2021] [Accepted: 11/19/2021] [Indexed: 11/16/2022] Open
Abstract
Polylactic acid (PLA) is a widely used bioresorbable polymer in medical devices owing to its biocompatibility, bioresorbability, and biodegradability. It is also considered a sustainable solution for a wide variety of other applications, including packaging. Because of its widespread use, there have been many studies evaluating this polymer. However, gaps still exist in our understanding of the hydrolytic degradation in extreme pH environments and its impact on physical and mechanical properties, especially in fibrous materials. The goal of this work is to explore the hydrolytic degradation of PLA fibers as a function of a wide range of pH values and exposure times. To complement the experimental measurements, molecular-level details were obtained using both molecular dynamics (MD) simulations with ReaxFF and density functional theory (DFT) calculations. The hydrolytic degradation of PLA fibers from both experiments and simulations was observed to have a faster rate of degradation in alkaline conditions, with 40% of strength loss of the fibers in just 25 days together with an increase in the percent crystallinity of the degraded samples. Additionally, surface erosion was observed in these PLA fibers, especially in extreme alkaline environments, in contrast to bulk erosion observed in molded PLA grafts and other materials, which is attributed to the increased crystallinity induced during the fiber spinning process. These results indicate that spun PLA fibers function in a predictable manner as a bioresorbable medical device when totally degraded at end-of-life in more alkaline conditions.
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Affiliation(s)
- Radhika Vaid
- Fiber and Polymer Science Program, Wilson College of Textiles, NC State University, Raleigh, NC 27606, USA; (R.V.); (M.A.P.)
| | - Erol Yildirim
- Department of Chemistry, Middle East Technical University, 06800 Ankara, Turkey;
| | - Melissa A. Pasquinelli
- Fiber and Polymer Science Program, Wilson College of Textiles, NC State University, Raleigh, NC 27606, USA; (R.V.); (M.A.P.)
- Department of Forest Biomaterials, College of Natural Resources, NC State University, Raleigh, NC 27606, USA
| | - Martin W. King
- Fiber and Polymer Science Program, Wilson College of Textiles, NC State University, Raleigh, NC 27606, USA; (R.V.); (M.A.P.)
- College of Textiles, Donghua University, Shanghai 201620, China
- Correspondence: ; Tel.: +1-919-291-2563
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Awoyera PO, Nworgu TA, Shanmugam B, Prakash Arunachalam K, Mansouri I, Romero LMB, Hu JW. Structural Retrofitting of Corroded Reinforced Concrete Beams Using Bamboo Fiber Laminate. Materials (Basel) 2021; 14:ma14216711. [PMID: 34772236 PMCID: PMC8588280 DOI: 10.3390/ma14216711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 11/02/2021] [Accepted: 11/04/2021] [Indexed: 11/20/2022]
Abstract
Corrosion creates a significant degradation mechanism in reinforced concrete (RC) structures, which would require a high cost of maintenance and repair in affected buildings. However, as the cost of repairing corrosion-damaged structures is high, it is therefore pertinent to develop alternative eco-friendly and sustainable methods. In this study, structural retrofitting of corroded reinforced concrete beams was performed using bamboo fiber laminate. Three reinforced normal weight concrete beams were produced, two of which were exposed to laboratory simulated corrosion medium, and the remaining one sample served as control. Upon completion of the corrosion cycle, one of the two corroded beams was retrofitted externally with a prefabricated bamboo fiber laminate by bonding the laminate to the beam surface with the aid of an epoxy resin. The three beams were subjected to loading on a four-point ultimate testing machine, and the loads with corresponding deflections were recorded through the entire load cycle of the beams. Finally, the mass loss of embedded steel reinforcements was determined to measure the effect of corrosion on the beams and the steel. The result showed that corroded beams strengthened with bamboo laminates increase the bearing capacity. Using a single bamboo laminate in the tensile region of the corroded beam increased the ultimate load capacity of the beam up to 21.1% than the corroded beam without retrofit. It was demonstrated in this study that the use of bamboo fiber polymer for strengthening destressed RC beams is a more sustainable approach than the conventional synthetic fibers.
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Affiliation(s)
- Paul Oluwaseun Awoyera
- Department of Civil Engineering, Covenant University, Ota 112233, Nigeria; (P.O.A.); (T.A.N.)
| | | | - Balaji Shanmugam
- Department of Civil Engineering, Kongu Engineering College, Perundurai 638060, India;
| | | | - Iman Mansouri
- Department of Civil Engineering, Birjand University of Technology, Birjand 9719866981, Iran;
| | | | - Jong-Wan Hu
- Department of Civil and Environmental Engineering, Incheon National University, Incheon 22012, Korea
- Incheon Disaster Prevention Research Center, Incheon National University, Incheon 22012, Korea
- Correspondence:
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Finny AS, Popoola O, Andreescu S. 3D-Printable Nanocellulose-Based Functional Materials: Fundamentals and Applications. Nanomaterials (Basel) 2021; 11:2358. [PMID: 34578674 PMCID: PMC8471614 DOI: 10.3390/nano11092358] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 09/07/2021] [Accepted: 09/09/2021] [Indexed: 11/16/2022]
Abstract
Nanomaterials obtained from sustainable and natural sources have seen tremendous growth in recent times due to increasing interest in utilizing readily and widely available resources. Nanocellulose materials extracted from renewable biomasses hold great promise for increasing the sustainability of conventional materials in various applications owing to their biocompatibility, mechanical properties, ease of functionalization, and high abundance. Nanocellulose can be used to reinforce mechanical strength, impart antimicrobial activity, provide lighter, biodegradable, and more robust materials for packaging, and produce photochromic and electrochromic devices. While the fabrication and properties of nanocellulose are generally well established, their implementation in novel products and applications requires surface modification, assembly, and manufacturability to enable rapid tooling and scalable production. Additive manufacturing techniques such as 3D printing can improve functionality and enhance the ability to customize products while reducing fabrication time and wastage of materials. This review article provides an overview of nanocellulose as a sustainable material, covering the different properties, preparation methods, printability and strategies to functionalize nanocellulose into 3D-printed constructs. The applications of 3D-printed nanocellulose composites in food, environmental, and energy devices are outlined, and an overview of challenges and opportunities is provided.
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Affiliation(s)
| | | | - Silvana Andreescu
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York, NY 13699-5810, USA; (A.S.F.); (O.P.)
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34
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Mistry A, Ucer C, Thompson JD, Khan RS, Karahmet E, Sher F. 3D Guided Dental Implant Placement: Impact on Surgical Accuracy and Collateral Damage to the Inferior Alveolar Nerve. Dent J (Basel) 2021; 9:dj9090099. [PMID: 34562973 PMCID: PMC8470513 DOI: 10.3390/dj9090099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 08/27/2021] [Accepted: 08/31/2021] [Indexed: 01/26/2023] Open
Abstract
An increase in the number of implants placed has led to a corresponding increase in the number of complications reported. The complications can vary from restorative complications due to poor placement to damage to collateral structures such as nerves and adjacent teeth. A large majority of these complications can be avoided if the implant has been placed accurately in the optimal position. Therefore, the aim of this in vitro pilot study was to investigate the effect of freehand (FH) and fully guided (FG) surgery on the accuracy of implants placed in close proximity to vital structures such as the inferior alveolar nerve (IAN). Cone-beam computed tomography (CBCT) and intraoral scans of six patients who have had previous dental implants in the posterior mandible were used in this study. The ideal implant position was planned. FG surgical guides were manufactured for each case. In this study, the three-dimensional 3D printed resin models of each of the cases were produced and the implants placed using FG and FH methods on the respective models. The outcome variables of the study, angular deviations were calculated and the distance to the IAN was measured. The mean deviations for the planned position observed were 1.10 mm coronally, 1.88 mm apically with up to 6.3 degrees’ angular deviation for FH surgery. For FG surgical technique the mean deviation was found to be at 0.35 mm coronally, 0.43 mm apically with 0.78 degrees angularly respectively. The maximum deviation from the planned position for the apex of the implant to the IAN was 2.55 mm using FH and 0.63 mm FG. This bench study, within its limitations, demonstrated surgically acceptable accuracy for both FH and FG techniques that would allow safe placement of implants to vital structures such as the IAN when a safety zone of 3 mm is allowed. Nevertheless, a better margin of error was observed for FG surgery with respect to the angular deviation and controlling the distance of the implant to the IAN using R2 Gate® system.
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Affiliation(s)
- Amit Mistry
- Amit Mistry Implants, The Whitehouse, Greenalls Avenue, Warrington WA4 6HL, UK;
| | - Cemal Ucer
- ICE Postgraduate Dental Institute and Hospital, Salford M50 3XZ, UK;
| | - John D. Thompson
- School of Health and Society, University of Salford, Salford M5 4WT, UK;
| | - Rabia Sannam Khan
- Education and Research Director, ICE Postgraduate Dental Institute and Hospital, 24 Furness Quay, Salford M50 3XZ, UK;
| | - Emina Karahmet
- Department of Medical Chemistry, Faculty of Pharmacy, University of Tuzla, 75000 Tuzla, Bosnia and Herzegovina;
| | - Farooq Sher
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK
- Correspondence: ; Tel.: +44-(0)-115-84-86679
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35
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Rossi MM, Dell’Armi E, Lorini L, Amanat N, Zeppilli M, Villano M, Petrangeli Papini M. Combined Strategies to Prompt the Biological Reduction of Chlorinated Aliphatic Hydrocarbons: New Sustainable Options for Bioremediation Application. Bioengineering (Basel) 2021; 8:bioengineering8080109. [PMID: 34436112 PMCID: PMC8389326 DOI: 10.3390/bioengineering8080109] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/29/2021] [Accepted: 07/29/2021] [Indexed: 11/16/2022] Open
Abstract
Groundwater remediation is one of the main objectives to minimize environmental impacts and health risks. Chlorinated aliphatic hydrocarbons contamination is prevalent and presents particularly challenging scenarios to manage with a single strategy. Different technologies can manage contamination sources and plumes, although they are usually energy-intensive processes. Interesting alternatives involve in-situ bioremediation strategies, which allow the chlorinated contaminant to be converted into non-toxic compounds by indigenous microbial activity. Despite several advantages offered by the bioremediation approaches, some limitations, like the relatively low reaction rates and the difficulty in the management and control of the microbial activity, can affect the effectiveness of a bioremediation approach. However, those issues can be addressed through coupling different strategies to increase the efficiency of the bioremediation strategy. This mini review describes different strategies to induce the reduction dechlorination reaction by the utilization of innovative strategies, which include the increase or the reduction of contaminant mobility as well as the use of innovative strategies of the reductive power supply. Subsequently, three future approaches for a greener and more sustainable intervention are proposed. In particular, two bio-based materials from renewable resources are intended as alternative, long-lasting electron-donor sources (e.g., polyhydroxyalkanoates from mixed microbial cultures) and a low-cost adsorbent (e.g., biochar from bio-waste). Finally, attention is drawn to novel bio-electrochemical systems that use electric current to stimulate biological reactions.
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Jia Y, Ji L, Gao H, Liu Y, Yang D, Li T, Bai J, Hu Q, Wang M, Liu J. Carbon nitride grafted waste-derived carbon as sustainable materials for lithium-sulfur batteries. Nanotechnology 2021; 32:315403. [PMID: 33735853 DOI: 10.1088/1361-6528/abf000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
The synthesis of a sustainable material through carbon nitride (C3N4) chemically grafted on waste-derived carbon including carbonizing coals (PM), melamine-urea-formaldehyde resins (MUF-C-1100), and luffa cylindrical sponges (SG), respectively, and its application as sulfur cathode in lithium-sulfur (Li-S) batteries were demonstrated. The Li-S cell assembled by the sulfur (S) cathode with component from C3N4grafted coal-derived carbon (PM-CN) possesses a specific capacity of 1269.8 mA h g-1at 0.05 C. At 1 C, the initial specific capacity of PM cathode is only 380.0 mA h g-1, comparable to the PM-CN5 cathode of 681.9 mA h g-1, and PM-CN10 cathode of 580.7 mA h g-1, respectively. And, PM-CN 5 cathode presents the capacity retention of 75.9% with a coulomb efficiency (C.E.) of 97.3% after 200 cycles. The MUF-CN cathode gives a specific capacity of 1335.6 mA h g-1at 0.05 C, and the capacity retention of 66.7% with a C. E. of 93.6% after 300 cycles at 0.5 C. The SG-CN cathode had a specific capacity of 953.9 mA h g-1at 0.05 C, and capacity retention of 95.1% with a C. E. of 98.2% after 125 cycles at 1 C. The remarkable improved performances were mainly ascribed to the sustainable materials as S host with micro-meso pore and C3N4structure providing the strong affinity N sites to lithium polysulfides (LiPSs). This work provides an attractive approach for the preparation of sustainable materials by rational design of grafting C3N4to waste-derived carbons with functions as S cathode materials for high-performance Li-S batteries.
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Affiliation(s)
- Yongfeng Jia
- Nano Innovation Institute (NII), Inner Mongolia Key Lab of Carbon Nanomaterials, College of Chemistry and Materials Science, Inner Mongolia University for Nationalities, Tongliao, 028000, People's Republic of China
| | - Lei Ji
- Nano Innovation Institute (NII), Inner Mongolia Key Lab of Carbon Nanomaterials, College of Chemistry and Materials Science, Inner Mongolia University for Nationalities, Tongliao, 028000, People's Republic of China
| | - Hongda Gao
- Chemical Engineering College, Inner Mongolia University of Technology, Huhhot, 010051, People's Republic of China
| | - Yanji Liu
- Nano Innovation Institute (NII), Inner Mongolia Key Lab of Carbon Nanomaterials, College of Chemistry and Materials Science, Inner Mongolia University for Nationalities, Tongliao, 028000, People's Republic of China
| | - Daotong Yang
- Nano Innovation Institute (NII), Inner Mongolia Key Lab of Carbon Nanomaterials, College of Chemistry and Materials Science, Inner Mongolia University for Nationalities, Tongliao, 028000, People's Republic of China
| | - Tunan Li
- Nano Innovation Institute (NII), Inner Mongolia Key Lab of Carbon Nanomaterials, College of Chemistry and Materials Science, Inner Mongolia University for Nationalities, Tongliao, 028000, People's Republic of China
| | - Jie Bai
- Chemical Engineering College, Inner Mongolia University of Technology, Huhhot, 010051, People's Republic of China
| | - Quanli Hu
- Nano Innovation Institute (NII), Inner Mongolia Key Lab of Carbon Nanomaterials, College of Chemistry and Materials Science, Inner Mongolia University for Nationalities, Tongliao, 028000, People's Republic of China
| | - Meijun Wang
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, 030024, People's Republic of China
| | - Jinghai Liu
- Nano Innovation Institute (NII), Inner Mongolia Key Lab of Carbon Nanomaterials, College of Chemistry and Materials Science, Inner Mongolia University for Nationalities, Tongliao, 028000, People's Republic of China
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Drużbicki K, Gaboardi M, Fernandez-Alonso F. Dynamics & Spectroscopy with Neutrons-Recent Developments & Emerging Opportunities. Polymers (Basel) 2021; 13:1440. [PMID: 33947108 PMCID: PMC8125526 DOI: 10.3390/polym13091440] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 04/27/2021] [Indexed: 12/19/2022] Open
Abstract
This work provides an up-to-date overview of recent developments in neutron spectroscopic techniques and associated computational tools to interrogate the structural properties and dynamical behavior of complex and disordered materials, with a focus on those of a soft and polymeric nature. These have and continue to pave the way for new scientific opportunities simply thought unthinkable not so long ago, and have particularly benefited from advances in high-resolution, broadband techniques spanning energy transfers from the meV to the eV. Topical areas include the identification and robust assignment of low-energy modes underpinning functionality in soft solids and supramolecular frameworks, or the quantification in the laboratory of hitherto unexplored nuclear quantum effects dictating thermodynamic properties. In addition to novel classes of materials, we also discuss recent discoveries around water and its phase diagram, which continue to surprise us. All throughout, emphasis is placed on linking these ongoing and exciting experimental and computational developments to specific scientific questions in the context of the discovery of new materials for sustainable technologies.
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Affiliation(s)
- Kacper Drużbicki
- Materials Physics Center, CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia-San Sebastian, Spain;
- Polish Academy of Sciences, Center of Molecular and Macromolecular Studies, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Mattia Gaboardi
- Elettra—Sincrotrone Trieste S.C.p.A., S.S. 14 km 163.5 in Area Science Park, 34149 Trieste, Italy;
| | - Felix Fernandez-Alonso
- Materials Physics Center, CSIC-UPV/EHU, Paseo Manuel de Lardizabal 5, 20018 Donostia-San Sebastian, Spain;
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastian, Spain
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
- IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain
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Belebchouche C, Moussaceb K, Bensebti SE, Aït-Mokhtar A, Hammoudi A, Czarnecki S. Mechanical and Microstructural Properties of Ordinary Concrete with High Additions of Crushed Glass. Materials (Basel) 2021; 14:ma14081872. [PMID: 33918771 PMCID: PMC8068933 DOI: 10.3390/ma14081872] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/03/2021] [Accepted: 04/07/2021] [Indexed: 11/16/2022]
Abstract
This study investigates the use of crushed glass waste as partial cement replacement in ordinary concretes. Six concrete mixes were designed and prepared: a reference without substitution and five substitution percentages of crushed glass waste ranging from 5% to 25%. The made concrete mix design underwent different tests, namely: slump test, mechanical strength, thermogravimetric analysis (TGA), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) determination and finally, water porosimetry, in order to evaluate the influence of the use of crushed glass waste on the properties of fresh and hardened concrete. Mechanical strengths results show that the use of 15% of the crushed glass waste improves the mechanical strength. TGA analysis confirms this result by highlighting a higher hydration degree. The latter contributes to the reduction of the porosity and, consequently, the mechanical strength increases. Also, it can be caused by the increasing amount of chromium which, if added a little, accelerates the hydration of C3S and leads to an increase of the mechanical strength. The BET technique and porosimetry tests showed that the use of crushed glass waste reduces the global porosity of concrete. This is due to the filling effect of the glass powder.
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Affiliation(s)
- Cherif Belebchouche
- Départment de Génie Civil, Faculté des Sciences de la Technologie, Université Frères Mentouri Constantine 1, Constantine 25000, Algeria;
- Correspondence: (C.B.); (S.C.); Tel.: +213-661-456-371 (C.B.)
| | - Karim Moussaceb
- Département de Technologie, Faculté de Technologie, Université Abderrahemane Mira de Bejaia, Bejaia 06000, Algeria; (K.M.); (A.H.)
| | - Salah-Eddine Bensebti
- Départment de Génie Civil, Faculté des Sciences de la Technologie, Université Frères Mentouri Constantine 1, Constantine 25000, Algeria;
| | - Abdelkarim Aït-Mokhtar
- Laboratoire des Sciences de l’Ingénieur pour l’Environnement UMR CNRS 7356, Université de La Rochelle, 17042 La Rochelle, France;
| | - Abdelkader Hammoudi
- Département de Technologie, Faculté de Technologie, Université Abderrahemane Mira de Bejaia, Bejaia 06000, Algeria; (K.M.); (A.H.)
| | - Slawomir Czarnecki
- Faculty of Civil Engineering, Wroclaw University of Science and Techology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
- Correspondence: (C.B.); (S.C.); Tel.: +213-661-456-371 (C.B.)
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Bontempi E, Sorrentino GP, Zanoletti A, Alessandri I, Depero LE, Caneschi A. Sustainable Materials and their Contribution to the Sustainable Development Goals (SDGs): A Critical Review Based on an Italian Example. Molecules 2021; 26:1407. [PMID: 33807763 DOI: 10.3390/molecules26051407] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 02/22/2021] [Accepted: 03/02/2021] [Indexed: 12/18/2022] Open
Abstract
The Sustainable Development Goals (SDGs) have been proposed to give a possible future to humankind. Due to the multidimensional characteristic of sustainability, SDGs need research activities with a multidisciplinary approach. This work aims to provide a critical review of the results concerning sustainable materials obtained by Italian researchers affiliated to the National Interuniversity Consortium of Materials Science and Technology (INSTM) and their contribution to reaching specific indicators of the 17 SDGs. Data were exposed by using the Web of Science (WoS) database. In the investigated period (from 2016 to 2020), 333 works about sustainable materials are found and grouped in one of the following categories: chemicals (33%), composites (11%), novel materials for pollutants sequestration (8%), bio-based and food-based materials (10%), materials for green building (8%), and materials for energy (29%). This review contributes to increasing the awareness of several of the issues concerning sustainable materials but also to encouraging the researchers to focus on SDGs’ interconnections. Indeed, the mapping of the achievements can be relevant to the decision-makers to identify the opportunities that materials can offer to achieve the final goals. In this frame, a “Sustainable Materials Partnership for SDGs” is envisaged for more suitable resource management in the future.
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Hazrati KZ, Sapuan SM, Zuhri MYM, Jumaidin R. Extraction and Characterization of Potential Biodegradable Materials Based on Dioscorea hispida Tubers. Polymers (Basel) 2021; 13:polym13040584. [PMID: 33672030 PMCID: PMC7919467 DOI: 10.3390/polym13040584] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 01/29/2021] [Accepted: 01/29/2021] [Indexed: 02/07/2023] Open
Abstract
This study was driven by the stringent environmental legislation concerning the consumption and utilization of eco-friendly materials. Within this context, this paper aimed to examine the characteristics of starch and fibres from the Dioscorea hispida tuber plant to explore their potential as renewable materials. The extraction of the Dioscorea hispida starch and Dioscorea hispida fibres was carried out and the chemical composition, physical, thermal, morphological properties, and crystallinity were studied. The chemical composition investigations revealed that the Dioscorea hispida starch (DHS) has a low moisture t (9.45%) and starch content (37.62%) compared to cassava, corn, sugar palm, and arrowroot starches. Meanwhile, the Dioscorea hispida fibres (DHF) are significantly low in hemicellulose (4.36%), cellulose (5.63%), and lignin (2.79%) compared to cassava, corn hull and sugar palm. In this investigation the chemical, physical, morphological and thermal properties of the Dioscorea hispida fibre and Dioscorea hispida starch were examined by chemical composition investigation, scanning electron microscopy (SEM), particle size distribution, thermogravimetric analysis (TGA), X-ray powder diffraction (XRD), and Fourier transform infrared (FTIR), respectively. It was found that Dioscorea hispida waste is promising alternative biomass and sustainable material with excellent potential as a renewable filler material for food packaging applications.
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Affiliation(s)
- K. Z. Hazrati
- Advanced Engineering Materials and Composites Research Centre, Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (K.Z.H.); (M.Y.M.Z.)
- German Malaysian Institute, Jalan Ilmiah, Taman Universiti, Kajang 43000, Selangor, Malaysia
| | - S. M. Sapuan
- Advanced Engineering Materials and Composites Research Centre, Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (K.Z.H.); (M.Y.M.Z.)
- Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia
- Correspondence: ; Tel.: +60-3-9769-1788
| | - M. Y. M. Zuhri
- Advanced Engineering Materials and Composites Research Centre, Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (K.Z.H.); (M.Y.M.Z.)
- Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia
| | - R. Jumaidin
- Fakulti Teknologi Kejuruteraan Mekanikal dan Pembuatan, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal 76100, Melaka, Malaysia;
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K Ramakrishnan R, Padil VVT, Wacławek S, Černík M, Varma RS. Eco-Friendly and Economic, Adsorptive Removal of Cationic and Anionic Dyes by Bio-Based Karaya Gum-Chitosan Sponge. Polymers (Basel) 2021; 13:251. [PMID: 33451026 DOI: 10.3390/polym13020251] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/07/2021] [Accepted: 01/10/2021] [Indexed: 12/15/2022] Open
Abstract
A novel, lightweight (8 mg/cm3), conjugate sponge of karaya gum (Kg) and chitosan (Ch) has been synthesized with very high porosity (~98%) and chemical stability, as a pH-responsive adsorbent material for the removal of anionic and cationic dyes from aqueous solutions. Experimental results showed that Kg-Ch conjugate sponge has good adsorption capacity for anionic dye methyl orange (MO: 32.81 mg/g) and cationic dye methylene blue (MB: 32.62 mg/g). The optimized Kg:Ch composition grants access to the free and pH-dependent ionizable functional groups on the surface of the sponge for the adsorption of dyes. The studies on the adsorption process as a function of pH, adsorbate concentration, adsorbent dose, and contact time indicated that the adsorption capacity of MB was decreased with increasing pH from 5 to 10 and external mass transfer together with intra-particle diffusion. The adsorption isotherm of the anionic dye MO was found to correlate with the Langmuir model (R2 = 0.99) while the adsorption of the cationic MB onto the sponge was better described by the Freundlich model (R2 = 0.99). Kinetic regression results specified that the adsorption kinetics were well represented by the pseudo-second-order model. The H-bonding, as well as electrostatic interaction between the polymers and the adsorption interactions of dyes onto Kg-Ch sponge from aqueous solutions, were investigated using attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectroscopy, and the highly wrinkled porous morphology was visualized in depth by field-emission scanning electron microscopy (FE-SEM) analysis. Moreover, the samples could be reused without loss of contaminant removal capacity over six successive adsorption-desorption cycles. The hierarchical three-dimensional sponge-like structure of Kg has not been reported yet and this novel Kg-Ch sponge functions as a promising candidate for the uninterrupted application of organic pollutant removal from water.
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Gomez TS, Zuluaga S, Jimenez M, Navacerrada MDLÁ, Barbero-Barrera MDM, de la Prida D, Restrepo-Osorio A, Fernández-Morales P. Evaluation of Colombian Crops Fibrous Byproducts for Potential Applications in Sustainable Building Acoustics. Polymers (Basel) 2020; 13:polym13010101. [PMID: 33383807 PMCID: PMC7795984 DOI: 10.3390/polym13010101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/17/2020] [Accepted: 12/17/2020] [Indexed: 11/16/2022] Open
Abstract
Local production of construction materials is a valuable tool for improving the building sector sustainability. In this sense, the use of lignocellulosic fibers from local species becomes an interesting alternative to the development of such materials. As it is thought that the properties of fiber-based materials are dependent on the fibers properties, the knowledge of such properties is fundamental to promote materials development. This study compares the physical, morphological, acoustic, and mechanical characteristics of coir (Cocos nucifera) and fique (Furcraea Agavaceae) fibers and panels. The chemical composition appears to be associated with the general behavior of the fibers and panels, regarding higher tensile strength, thermal degradation behavior, and water absorption. In most tests, fique had the upper hand, showing superior performance; however, on thermal degradation and water absorption, both materials had similar behavior. The sound absorption measurement showed that the fiber diameter affects the sound absorption at high frequencies, where fique panels showed better performance than coir panels.
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Affiliation(s)
- Tomas Simon Gomez
- Escuela de Ingenierías, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín 050031, Colombia; (T.S.G.); (S.Z.); (M.J.); (A.R.-O.); (P.F.-M.)
| | - Santiago Zuluaga
- Escuela de Ingenierías, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín 050031, Colombia; (T.S.G.); (S.Z.); (M.J.); (A.R.-O.); (P.F.-M.)
| | - Maritza Jimenez
- Escuela de Ingenierías, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín 050031, Colombia; (T.S.G.); (S.Z.); (M.J.); (A.R.-O.); (P.F.-M.)
| | - María de los Ángeles Navacerrada
- Escuela Técnica Superior de Arquitectura, Universidad Politécnica de Madrid, Avenida Juan de Herrera 4, 28040 Madrid, Spain; (M.d.M.B.-B.); (D.d.l.P.)
- Correspondence:
| | - María del Mar Barbero-Barrera
- Escuela Técnica Superior de Arquitectura, Universidad Politécnica de Madrid, Avenida Juan de Herrera 4, 28040 Madrid, Spain; (M.d.M.B.-B.); (D.d.l.P.)
| | - Daniel de la Prida
- Escuela Técnica Superior de Arquitectura, Universidad Politécnica de Madrid, Avenida Juan de Herrera 4, 28040 Madrid, Spain; (M.d.M.B.-B.); (D.d.l.P.)
| | - Adriana Restrepo-Osorio
- Escuela de Ingenierías, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín 050031, Colombia; (T.S.G.); (S.Z.); (M.J.); (A.R.-O.); (P.F.-M.)
| | - Patricia Fernández-Morales
- Escuela de Ingenierías, Universidad Pontificia Bolivariana, Circular 1 # 70-01, Medellín 050031, Colombia; (T.S.G.); (S.Z.); (M.J.); (A.R.-O.); (P.F.-M.)
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Kosmela P, Suchorzewski J, Formela K, Kazimierski P, Haponiuk JT, Piszczyk Ł. Microstructure-Property Relationship of Polyurethane Foams Modified with Baltic Sea Biomass: Microcomputed Tomography vs. Scanning Electron Microscopy. Materials (Basel) 2020; 13:ma13245734. [PMID: 33339184 PMCID: PMC7765592 DOI: 10.3390/ma13245734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/07/2020] [Accepted: 12/10/2020] [Indexed: 01/02/2023]
Abstract
In this paper, novel rigid polyurethane foams modified with Baltic Sea biomass were compared with traditional petro-based polyurethane foam as reference sample. A special attention was focused on complex studies of microstructure, which was visualized and measured in 3D with high-resolution microcomputed tomography (microCT) and, as commonly applied for this purpose, scanning electron microscopy (SEM). The impact of pore volume, area, shape and orientation on appearance density and thermal insulation properties of polyurethane foams was determined. The results presented in the paper confirm that microcomputed tomography is a useful tool for relatively quick estimation of polyurethane foams’ microstructure, what is crucial especially in the case of thermal insulation materials.
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Affiliation(s)
- Paulina Kosmela
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, G. Narutowicza 11/12, 80-233 Gdansk, Poland; (J.T.H.); (Ł.P.)
- Correspondence: (P.K.); (K.F.)
| | - Jan Suchorzewski
- Division Built Environment, Department Infrastructure and Concrete Structures, Material Design, RISE Research Institutes of Sweden, Brinellgatan 4, 501-15 Borås, Sweden;
- Department of Concrete Structures, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, G. Narutowicza 11/12, 80-233 Gdansk, Poland
| | - Krzysztof Formela
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, G. Narutowicza 11/12, 80-233 Gdansk, Poland; (J.T.H.); (Ł.P.)
- Correspondence: (P.K.); (K.F.)
| | - Paweł Kazimierski
- Institute of Fluid Flow Machinery, Fiszera Str. 14, 80-231 Gdansk, Poland;
| | - Józef Tadeusz Haponiuk
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, G. Narutowicza 11/12, 80-233 Gdansk, Poland; (J.T.H.); (Ł.P.)
| | - Łukasz Piszczyk
- Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, G. Narutowicza 11/12, 80-233 Gdansk, Poland; (J.T.H.); (Ł.P.)
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Liuzzi S, Rubino C, Stefanizzi P, Martellotta F. Performance Characterization of Broad Band Sustainable Sound Absorbers Made of Almond Skins. Materials (Basel) 2020; 13:ma13235474. [PMID: 33271849 PMCID: PMC7731410 DOI: 10.3390/ma13235474] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 11/25/2020] [Accepted: 11/28/2020] [Indexed: 11/25/2022]
Abstract
In order to limit the environmental impact caused by the use of non-renewable resources, a growing research interest is currently being shown in the reuse of agricultural by-products as new raw materials for green building panels. Moreover, the European directives impose the goal of sustainability supporting the investigation of passive solutions for the reduction of energy consumption. Thus, the promotion of innovative building materials for the enhancement of acoustic and thermal insulation of the buildings is an important issue. The aim of the present research was to evaluate the physical, acoustical, and thermal performances of building panels produced by almond skin residues, derived from the industrial processing of almonds. In this paper different mix designs were investigated using polyvinyl acetate glue and gum Arabic solution as binders. Air-flow resistivity σ and normal incidence sound absorption coefficient α were measured by means of a standing wave tube. Thermal conductivity λ, thermal diffusivity α, volumetric heat capacity ρc were measured using a transient plane source device. Finally, water vapor permeability δp was experimentally determined using the dry cup method. Furthermore, a physical characterization of the specimens in terms of bulk density ρb and porosity η allowed to study the correlation existing between the binder and the aggregates and the consequent acoustical and hygrothermal behavior occurring on the different mix designs. The achieved results suggested the investigated materials comparable to the main products currently existing on the market.
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Kelly PV, Cheng P, Gardner DJ, Gramlich WM. Aqueous Polymer Modification of Cellulose Nanofibrils by Grafting-Through a Reactive Methacrylate Group. Macromol Rapid Commun 2020; 42:e2000531. [PMID: 33205506 DOI: 10.1002/marc.202000531] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/14/2020] [Indexed: 12/21/2022]
Abstract
Modifying the surface of cellulose nanofibrils (CNFs) produced by mechanical refinement with a variety of polymer functional groups in an entirely water-based system is challenging because only surface hydroxyl groups are accessible. To address this limitation, an entirely water-based, polymer modification scheme is developed. CNFs are functionalized with a reactive methacrylate functional group followed by subsequent grafting-through polymerization. This modification worked with a variety of water-soluble and water-insoluble (meth)acrylates and (meth)acrylamides, grafting up to 45 wt% polymer on to the CNFs. The reaction conditions introducing the methacrylate functional group are adjusted to vary the degree of functionality. Soxhlet extraction of modified samples demonstrates that the reactive methacrylate group is necessary to facilitate polymer grafting. The degree of functionalization of the polymers is studied via quantitative transmission IR spectroscopy and the morphology of the resulting cellulose nanofibrils is studied via a combination of optical, scanning electron, and atomic force microscopy. High levels of polymer modification do not significantly affect the micrometer-scale fibril morphology.
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Affiliation(s)
- Peter V Kelly
- Department of Chemistry, University of Maine, Orono, ME, 04469, USA
| | - Peng Cheng
- Department of Chemistry, University of Maine, Orono, ME, 04469, USA
| | - Douglas J Gardner
- School of Forest Resources, University of Maine, Orono, ME, 04469, USA.,Advanced Structures and Composites Center, University of Maine, Orono, ME, 04469, USA
| | - William M Gramlich
- Department of Chemistry, University of Maine, Orono, ME, 04469, USA.,Advanced Structures and Composites Center, University of Maine, Orono, ME, 04469, USA
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Ghasemlou M, Daver F, Ivanova EP, Murdoch BJ, Adhikari B. Use of Synergistic Interactions to Fabricate Transparent and Mechanically Robust Nanohybrids Based on Starch, Non-Isocyanate Polyurethanes, and Cellulose Nanocrystals. ACS Appl Mater Interfaces 2020; 12:47865-47878. [PMID: 33040521 DOI: 10.1021/acsami.0c14525] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Materials based on petroleum-based resources have aroused widespread concern because of their environmental and healthcare footprints. Cellulose nanocrystals (CNCs) are at the cutting edge of current research because of their great promise in developing sustainable and high-performance materials. To establish a comprehensive understanding of the synergistic reinforcement effect of CNCs, we introduced a new method to fabricate all-green, transparent, and mechanically robust nanohybrid materials using CNCs in conjunction with gelatinized starch (GS) and polyhydroxyurethanes (PHUs). The synergistic interaction between the CNC skeleton and the GS/PHU network enabled us to span exceptionally stiff nanohybrids that could withstand up to 8.5 MPa tensile strength. The tunable mechanical properties and enhanced thermal stability in these nanohybrids primarily arise from the presence of dense hydroxyl groups on the CNCs' surface, which offer a robust scaffold for fortified hydrogen bonds to form with GS/PHU domains. The multiple intramolecular hydrogen bonds synergistically served as highly stable associations and concurrently facilitated energy dissipation and transferred the stress across the interfacial region. The rational design of the molecular interactions presented in this work provided increased opportunities to build nanohybrids with outstanding mechanical performance. More broadly, the insights afforded by this study not only delivered a better understanding on the molecular-level interactions in the CNC/GS/PHU system but also enriched the potential for the commercial exploration of tunable cellulosic nanohybrid materials.
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Affiliation(s)
- Mehran Ghasemlou
- School of Science, College of Science, Engineering & Health, RMIT University, Melbourne, Victoria 3000, Australia
| | - Fugen Daver
- School of Engineering, College of Science, Engineering & Health, RMIT University, Melbourne, Victoria 3000, Australia
| | - Elena P Ivanova
- School of Science, College of Science, Engineering & Health, RMIT University, Melbourne, Victoria 3000, Australia
| | - Billy J Murdoch
- RMIT Microscopy and Microanalysis Facility, College of Science, Engineering & Health, RMIT University, Melbourne, Victoria 3001, Australia
| | - Benu Adhikari
- School of Science, College of Science, Engineering & Health, RMIT University, Melbourne, Victoria 3000, Australia
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Abbasi S, Jannaty MH, Faraj RH, Shahbazpanahi S, Mosavi A. The Effect of Incorporating Silica Stone Waste on the Mechanical Properties of Sustainable Concretes. Materials (Basel) 2020; 13:E3832. [PMID: 32872612 DOI: 10.3390/ma13173832] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 08/21/2020] [Accepted: 08/26/2020] [Indexed: 12/02/2022]
Abstract
Incorporating various industrial waste materials into concrete has recently gained attention for sustainable construction. This paper, for the first time, studies the effects of silica stone waste (SSW) powder on concrete. The cement of concrete was replaced with 5, 10, 15, and 20% of the SSW powder. The mechanical properties of concrete, such as compressive and tensile strength, were studied. Furthermore, the microstructure of concrete was studied by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy analysis (EDX), Fourier transformed infrared spectroscopy (FTIR), and X-Ray diffraction (XRD) tests. Compressive and tensile strength of samples with 5% SSW powder was improved up to 18.8% and 10.46%, respectively. As can be observed in the SEM images, a reduced number of pores and higher density in the matrix can explain the better compressive strength of samples with 5% SSW powder.
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Guo J, Haehnle B, Hoenders D, Creusen G, Jiao D, Kuehne AJC, Walther A. Biodegradable Laser Arrays Self-Assembled from Plant Resources. Adv Mater 2020; 32:e2002332. [PMID: 32537782 DOI: 10.1002/adma.202002332] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 05/15/2020] [Indexed: 05/10/2023]
Abstract
The transition toward future sustainable societies largely depends on disruptive innovations in biobased materials to substitute nonsustainable advanced functional materials. In the field of optics, advanced devices (e.g., lasers or metamaterial devices) are typically manufactured using top-down engineering and synthetic materials. This work breaks with such concepts and switchable lasers self-assembled from plant-based cellulose nanocrystals and fluorescent polymers at room temperature and from water are shown. Controlled structure formation allows laser-grade cholesteric photonic bandgap materials, in which the photonic bandgap is matched to the fluorescence emission to function as an efficient resonator for low threshold multimode lasing. The lasers can be switched on and off using humidity, and can be printed into pixelated arrays. Additionally, the materials exhibit stiffness above typical thermoplastic polymers and biodegradability in soil. The concept showcases that highly advanced functions can be encoded into biobased materials, and opens the design space for future sustainable optical devices of unprecedented function.
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Affiliation(s)
- Jiaqi Guo
- A3BMS Lab, Institute for Macromolecular Chemistry, University of Freiburg, Stefan-Meier-Str. 31, Freiburg, 79104, Germany
- Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Str. 21, Freiburg, 79104, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, Freiburg, 79110, Germany
| | - Bastian Haehnle
- Institute of Organic and Macromolecular Chemistry, Ulm University, Albert-Einstein-Allee 11, Ulm, 89081, Germany
| | - Daniel Hoenders
- A3BMS Lab, Institute for Macromolecular Chemistry, University of Freiburg, Stefan-Meier-Str. 31, Freiburg, 79104, Germany
- Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Str. 21, Freiburg, 79104, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, Freiburg, 79110, Germany
| | - Guido Creusen
- A3BMS Lab, Institute for Macromolecular Chemistry, University of Freiburg, Stefan-Meier-Str. 31, Freiburg, 79104, Germany
- Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Str. 21, Freiburg, 79104, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, Freiburg, 79110, Germany
| | - Dejin Jiao
- A3BMS Lab, Institute for Macromolecular Chemistry, University of Freiburg, Stefan-Meier-Str. 31, Freiburg, 79104, Germany
- Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Str. 21, Freiburg, 79104, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, Freiburg, 79110, Germany
| | - Alexander J C Kuehne
- Institute of Organic and Macromolecular Chemistry, Ulm University, Albert-Einstein-Allee 11, Ulm, 89081, Germany
| | - Andreas Walther
- A3BMS Lab, Institute for Macromolecular Chemistry, University of Freiburg, Stefan-Meier-Str. 31, Freiburg, 79104, Germany
- Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Str. 21, Freiburg, 79104, Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, Freiburg, 79110, Germany
- Cluster of Excellence livMatS @ FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, Freiburg, 79110, Germany
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Fiume E, Tulyaganov D, Ubertalli G, Verné E, Baino F. Dolomite-Foamed Bioactive Silicate Scaffolds for Bone Tissue Repair. Materials (Basel) 2020; 13:E628. [PMID: 32023840 DOI: 10.3390/ma13030628] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 01/17/2020] [Accepted: 01/29/2020] [Indexed: 11/17/2022]
Abstract
The use of three-dimensional (3D) scaffolds is recognized worldwide as a valuable biomedical approach for promoting tissue regeneration in critical-size bone defects. Over the last 50 years, bioactive glasses have been intensively investigated in a wide range of different clinical applications, from orthopedics to soft tissue healing. Bioactive glasses exhibit the unique capability to chemically bond to the host tissue and, furthermore, their processing versatility makes them very appealing due to the availability of different manufacturing techniques for the production of porous and interconnected synthetic bone grafts able to support new tissue growth over the whole duration of the treatment. As a novel contribution to the broad field of scaffold manufacturing, we report here an effective and relatively easy method to produce silicate glass-derived scaffolds by using, for the first time in the biomedical field, dolomite powder as a foaming agent for the formation of 3D bone-like porous structures. Morphological/structural features, crystallization behavior, and in vitro bioactivity in a simulated body fluid (SBF) were investigated. All the tested scaffolds were found to fulfil the minimum requirements that a scaffold for osseous repair should exhibit, including porosity (65-83 vol.%) and compressive strength (1.3-3.9 MPa) comparable to those of cancellous bone, as well as hydroxyapatite-forming ability (bioactivity). This study proves the suitability of a dolomite-foaming method for the production of potentially suitable bone grafts based on bioactive glass systems.
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Rubino C, Bonet Aracil M, Gisbert-Payá J, Liuzzi S, Stefanizzi P, Zamorano Cantó M, Martellotta F. Composite Eco-Friendly Sound Absorbing Materials Made of Recycled Textile Waste and Biopolymers. Materials (Basel) 2019; 12:E4020. [PMID: 31816936 DOI: 10.3390/ma12234020] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 11/28/2019] [Accepted: 11/29/2019] [Indexed: 11/16/2022]
Abstract
In recent years, the interest in reusing recycled fibers as building materials has been growing as a consequence of their ability to reduce the production of waste and the use of virgin resources, taking advantage of the potential that fibrous materials may offer to improve thermal and acoustic comfort. Composite panels, made of 100% wool waste fibers and bound by means of either a chitosan solution and a gum Arabic solution, were tested and characterized in terms of acoustic and non-acoustic properties. Samples with a 5 cm thickness and different density values were made to investigate the influence of flow resistivity on the final performance. Experimental results demonstrated that the samples had thermal conductivity ranging between 0.049 and 0.060 W/(m K), well comparable to conventional building materials. Similarly, acoustic results were very promising, showing absorption coefficients that, for the given thickness, were generally higher than 0.5 from 500 Hz on, and higher than 0.9 from 1 kHz on. Finally, the effects of the non-acoustic properties and of the air gap behind the samples on the acoustic behavior were also analyzed, proving that the agreement with absorption values predicted by empirical models was also very good.
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