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Zhang J, Liang L, Miao Y, Yang Y, Bao X, Liu C. Open-tubular capillary electrochromatography with hydroxypropyl-β-cyclodextrin imprinted polymers: hybrid polyhedral oligomeric silsesquioxane as a coating for enantioseparation. RSC Adv 2022; 12:9637-9644. [PMID: 35424918 PMCID: PMC8985239 DOI: 10.1039/d2ra00079b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 03/22/2022] [Indexed: 11/21/2022] Open
Abstract
A hydroxypropyl-β-cyclodextrin (HP-β-CD) imprinted coating based on polyhedral oligomeric silsesquioxane (POSS) for open tubular electrochromatography was prepared. The mixture of methacryl-POSS (MA0735), HP-β-CD (template), methacrylic acid (MAA, monomer), N,N'-methylenebisacrylamide (MBA, crosslinker) and toluene-dimethyl sulfoxide (porogen) was used to synthesize the chiral selective coating. The influence of synthesis parameters on the imprinting effect and separation performance, including the amount of HP-β-CD, POSS, and MAA, was investigated systemically. The optimum polymerization was prepared by mixing HP-β-CD, MA0735, MAA, and MBA with the molar ratio of 1 : 1.87 : 1.60 : 1.60. Five racemates were separated by the modified capillary columns using aqueous buffer. Column efficiency on the POSS-based MIPs coating column was greater than 22 000 plates/m. MIPs-POSS hybrid coating capillaries had improved resolution (3.36 times) and the greatest resolution was up to 6.15 within 10 min.
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Affiliation(s)
- Jian Zhang
- School of Pharmacy, Xi'an Medical University Xi'an 710021 China
- Institute of Medicine, Xi'an Medical University Xi'an 710021 China
| | - Lingling Liang
- School of Pharmacy, Xi'an Medical University Xi'an 710021 China
- Institute of Medicine, Xi'an Medical University Xi'an 710021 China
| | - Yanqing Miao
- School of Pharmacy, Xi'an Medical University Xi'an 710021 China
- Institute of Medicine, Xi'an Medical University Xi'an 710021 China
| | - Yang Yang
- School of Pharmacy, Xi'an Medical University Xi'an 710021 China
| | - Xin Bao
- School of Pharmacy, Xi'an Medical University Xi'an 710021 China
| | - Chunye Liu
- School of Pharmacy, Xi'an Medical University Xi'an 710021 China
- Institute of Medicine, Xi'an Medical University Xi'an 710021 China
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Kedzior SA, Gabriel VA, Dubé MA, Cranston ED. Nanocellulose in Emulsions and Heterogeneous Water-Based Polymer Systems: A Review. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2002404. [PMID: 32797718 DOI: 10.1002/adma.202002404] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/25/2020] [Indexed: 06/11/2023]
Abstract
Nanocelluloses (i.e., bacterial nanocellulose, cellulose nanocrystals, and cellulose nanofibrils) are cellulose-based materials with at least one dimension in the nanoscale. These materials have unique and useful properties and have been shown to assemble at oil-water interfaces and impart new functionality to emulsion and latex systems. Herein, the use of nanocellulose in both emulsions and heterogeneous water-based polymers is reviewed, including dispersion, suspension, and emulsion polymerization. Comprehensive tables describe past work employing nanocellulose as stabilizers or additives and the properties that can be tailored through the use of nanocellulose are highlighted. Even at low loadings, nanocellulose offers an unprecedented level of control as a property modifier for a range of emulsion and polymer applications, influencing, for example, emulsion type, stability, and stimuli-responsive behavior. Nanocellulose can tune polymer particle properties such as size, surface charge, and morphology, or be used to produce capsules and polymer nanocomposites with enhanced mechanical, thermal, and adhesive properties. The role of nanocellulose is discussed, and a perspective for future direction is presented.
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Affiliation(s)
- Stephanie A Kedzior
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada
| | - Vida A Gabriel
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Pvt., Ottawa, ON, K1N 6N5, Canada
| | - Marc A Dubé
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Pvt., Ottawa, ON, K1N 6N5, Canada
| | - Emily D Cranston
- Department of Wood Science, Department of Chemical & Biological Engineering, University of British Columbia, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada
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Effect of Thermal Modification on the Nano-Mechanical Properties of the Wood Cell Wall and Waterborne Polyacrylic Coating. FORESTS 2020. [DOI: 10.3390/f11121247] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Masson pine (Pinus massoniana Lamb.) samples were heat-treated at different treatment temperatures (150, 170, and 190 °C), and the nano-mechanical properties of the wood cell wall, which was coated with a waterborne polyacrylic (WPA) lacquer product, were compared. The elastic modulus (Er) and hardness (H) of wood cell wall and the coating were measured and characterized by nanoindentation, and the influencing factors of mechanical properties during thermal modification were investigated by chemical composition analysis, contact angle analysis, and colorimetric analysis. The results showed that with the increase in the heat treatment temperature, the contact angle of the water on the wood’s surface and the colorimetric difference increased, while the content of the cellulose and hemicelluloses decreased. After thermal modification of 190 °C, the Er and H of the wood cell wall increased by 13.9% and 17.6%, respectively, and the Er and H of the WPA coating applied to the wood decreased by 12.1% and 22.2%. The Er and H of the interface between the coating and wood were lower than those near the coating’s surface. The Er and H of the cell wall at the interface between the coating and wood were lower than those far away from the coating. This study was of great significance for understanding the binding mechanism between coating and wood cell walls and improving the finishing technology of the wood materials after thermal modification.
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Abstract
AbstractCellulose nanofiber (CNF) is a crystalline fiber composed of a bundle of cellulose molecular chains and is expected to be used as a new biomass-derived nanomaterial. The CNF has a unique morphology: a few to tens of nanometer width and a submicrometer to micrometer length. Its application to various materials, in particular its utilization as a polymer reinforcing material, has been anticipated due to its excellent mechanical properties. However, CNFs and plastics are generally hard to mix, and thus, it is difficult to combine them at the nanolevel. In this review, we describe the CNF/polymer nanocompositing process from Pickering emulsion. We use ~3 nm-wide wood-derived CNFs and report on the preparation of CNF/polymer homogenous composite films. We also introduce a new type of CNF/polymer composite, a core-shell microparticle, using this Pickering emulsion as a template.
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Wang L, Borghei M, Ishfaq A, Lahtinen P, Ago M, Papageorgiou AC, Lundahl MJ, Johansson LS, Kallio T, Rojas OJ. Mesoporous Carbon Microfibers for Electroactive Materials Derived from Lignocellulose Nanofibrils. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2020; 8:8549-8561. [PMID: 33282568 PMCID: PMC7706107 DOI: 10.1021/acssuschemeng.0c00764] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 04/05/2020] [Indexed: 05/04/2023]
Abstract
The growing adoption of biobased materials for electronic, energy conversion, and storage devices has relied on high-grade or refined cellulosic compositions. Herein, lignocellulose nanofibrils (LCNF), obtained from simple mechanical fibrillation of wood, are proposed as a source of continuous carbon microfibers obtained by wet spinning followed by single-step carbonization at 900 °C. The high lignin content of LCNF (∼28% based on dry mass), similar to that of the original wood, allowed the synthesis of carbon microfibers with a high carbon yield (29%) and electrical conductivity (66 S cm-1). The incorporation of anionic cellulose nanofibrils (TOCNF) enhanced the spinnability and the porous morphology of the carbon microfibers, making them suitable platforms for electrochemical double layer capacitance (EDLC). The increased loading of LCNF in the spinning dope resulted in carbon microfibers of enhanced carbon yield and conductivity. Meanwhile, TOCNF influenced the pore evolution and specific surface area after carbonization, which significantly improved the electrochemical double layer capacitance. When the carbon microfibers were directly applied as fiber-shaped supercapacitors (25 F cm-3), they displayed a remarkably long-term electrochemical stability (>93% of the initial capacitance after 10 000 cycles). Solid-state symmetric fiber supercapacitors were assembled using a PVA/H2SO4 gel electrolyte and resulted in an energy and power density of 0.25 mW h cm-3 and 65.1 mW cm-3, respectively. Overall, the results indicate a green and facile route to convert wood into carbon microfibers suitable for integration in wearables and energy storage devices and for potential applications in the field of bioelectronics.
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Affiliation(s)
- Ling Wang
- Department
of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, Espoo 02150, Finland
| | - Maryam Borghei
- Department
of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, Espoo 02150, Finland
- E-mail:
| | - Amal Ishfaq
- Department
of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, Espoo 02150, Finland
| | - Panu Lahtinen
- VTT
Technical Research Centre of Finland, Biologinkuja 7, Espoo 02044, Finland
| | - Mariko Ago
- School
of Science and Engineering, Meisei University, 2-1-1 Hodokubo, Hino, Tokyo 191-8606, Japan
| | - Anastassios C. Papageorgiou
- Turku
Bioscience Centre, University of Turku and
Åbo Akademi University, Tykistökatu 6, Turku 20520, Finland
| | - Meri J. Lundahl
- Department
of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, Espoo 02150, Finland
| | - Leena -Sisko Johansson
- Department
of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, Espoo 02150, Finland
| | - Tanja Kallio
- Department
of Chemistry and Materials Science, Aalto
University, Kemistintie 1, Espoo 02150, Finland
| | - Orlando J. Rojas
- Department
of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, Espoo 02150, Finland
- Departments
of Chemical and Biological Engineering, Chemistry and Wood Science, University of British Columbia, 2360 East Mall, Vancouver, British Columbia, Canada V6T 1Z3
- E-mail:
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Chabros A, Gawdzik B, Podkościelna B, Goliszek M, Pączkowski P. Composites of Unsaturated Polyester Resins with Microcrystalline Cellulose and Its Derivatives. MATERIALS 2019; 13:ma13010062. [PMID: 31877709 PMCID: PMC6981706 DOI: 10.3390/ma13010062] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 12/17/2019] [Accepted: 12/19/2019] [Indexed: 12/04/2022]
Abstract
The paper investigates the properties of unsaturated polyester resins and microcrystalline cellulose (MCC) composites. The influence of MCC modification on mechanical, thermomechanical, and thermal properties of obtained materials was discussed. In order to reduce the hydrophilic character of the MCC surface, it was subjected to esterification with the methacrylic anhydride. This resulted in hydroxyl groups blocking and, additionally, the introduction of unsaturated bonds into its structure, which could participate in copolymerization with the curing resin. Composites of varying amounts of cellulose as a filler were obtained from modified MCC and unmodified (comparative) MCC. The modification of MCC resulted in obtaining composites characterized by greater flexural strength and strain at break compared with the analogous composites based on the unmodified MCC.
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Fujisawa S, Togawa E, Kuroda K. Nanocellulose-stabilized Pickering emulsions and their applications. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2017; 18:959-971. [PMID: 29383046 PMCID: PMC5784314 DOI: 10.1080/14686996.2017.1401423] [Citation(s) in RCA: 133] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 11/02/2017] [Accepted: 11/02/2017] [Indexed: 05/22/2023]
Abstract
Pickering emulsion, which is an emulsion stabilized by solid particles, offers a wide range of potential applications because it generally provides a more stable system than surfactant-stabilized emulsion. Among various solid stabilizers, nanocellulose may open up new opportunities for future Pickering emulsions owing to its unique nanosizes, amphiphilicity, and other favorable properties (e.g. chemical stability, biodegradability, biocompatibility, and renewability). In this review, the preparation and properties of nanocellulose-stabilized Pickering emulsions are summarized. We also provide future perspectives on their applications, such as drug delivery, food, and composite materials.
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Affiliation(s)
- Shuji Fujisawa
- Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - Eiji Togawa
- Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - Katsushi Kuroda
- Forestry and Forest Products Research Institute, Tsukuba, Japan
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