1
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Yu S, Budtova T. Creating and exploring carboxymethyl cellulose aerogels as drug delivery devices. Carbohydr Polym 2024; 332:121925. [PMID: 38431419 DOI: 10.1016/j.carbpol.2024.121925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 01/16/2024] [Accepted: 02/05/2024] [Indexed: 03/05/2024]
Abstract
Carboxymethyl cellulose (CMC) is a well-known cellulose derivative used in biomedical applications due to its biocompatibility and biodegradability. In this work, novel porous CMC materials, aerogels, were prepared and tested as a drug delivery device. CMC aerogels were made from CMC solutions, followed by non-solvent induced phase separation and drying with supercritical CO2. The influence of CMC characteristics and of processing conditions on aerogels' density, specific surface area, morphology and drug release properties were investigated. Freeze-drying of CMC solutions was also used as an alternative process to compare the properties of the as-obtained "cryogels" with those of aerogels. Aerogels were nanostructured materials with bulk density below 0.25 g/cm3 and high specific surface area up to 143 m2/g. Freeze drying yields highly macroporous materials with low specific surface areas (around 5-18 m2/g) and very low density, 0.01 - 0.07g/cm3. Swelling and dissolution of aerogels and cryogels in water and in a simulated wound exudate (SWE) were evaluated. The drug was loaded in aerogels and cryogels, and release kinetics in SWE was investigated. Drug diffusion coefficients were correlated with material solubility, morphology, density, degree of substitution and drying methods, demonstrating tuneability of new materials' properties in view of their use as delivery matrices.
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Affiliation(s)
- Sujie Yu
- Mines Paris, PSL University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, Rue Claude Daunesse, 06904 Sophia Antipolis, France
| | - Tatiana Budtova
- Mines Paris, PSL University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, Rue Claude Daunesse, 06904 Sophia Antipolis, France.
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2
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Zhu J, Wang Y, Zhao X, Li N, Guo X, Zhao L, Yin Y. Anisotropic composite aerogel with thermal insulation and flame retardancy from cellulose nanofibers, calcium alginate and boric acid. Int J Biol Macromol 2024; 267:131450. [PMID: 38588838 DOI: 10.1016/j.ijbiomac.2024.131450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 03/21/2024] [Accepted: 04/05/2024] [Indexed: 04/10/2024]
Abstract
With the increasing severity of energy shortages and environmental pollution, there is an urgent need for advanced thermal insulation materials with excellent comprehensive performance, including low thermal conductivity, high flame resistance, and strong compressive strength. Herein, an anisotropic composite aerogel based on cellulose nanofibers (CNF), calcium alginate (CA), and boric acid (BA) is fabricated using a directional freeze-drying strategy. The CA and BA, as double cross-linking agents, associated with oriented porous structure provide the resultant aerogel with good mechanical strength. Additionally, self-flame retardant CA and BA act as synergistic flame retardants that endow the aerogel with excellent flame retardance properties such as a limiting oxygen index value of 44.2 %, UL-94 V-0 rating, and low heat release. Furthermore, this composite aerogel exhibits outstanding thermal insulation performance with a low thermal conductivity of approximately 30 mW m-1 K-1. Therefore, the composite aerogel is expected to have a wide potential application in areas such as construction, automotive industry, batteries, petrochemical pipelines, and high-temperature reaction devices.
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Affiliation(s)
- Jintao Zhu
- Institute of Functional Textiles and Advanced Materials, Center for Advanced Fire-Safety Materials D & A (Shandong), College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Yangyang Wang
- Institute of Functional Textiles and Advanced Materials, Center for Advanced Fire-Safety Materials D & A (Shandong), College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Xiaoyi Zhao
- Institute of Functional Textiles and Advanced Materials, Center for Advanced Fire-Safety Materials D & A (Shandong), College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Nan Li
- Institute of Functional Textiles and Advanced Materials, Center for Advanced Fire-Safety Materials D & A (Shandong), College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China
| | - Xiaoyun Guo
- Yantai Key Laboratory of Functional Fibers and Textiles, Shandong Nanshan Fashion Sci-Tech Co., Ltd., Postdoctoral workstation of Nanshan Group Co., Ltd., Longkou 265706, China
| | - Liang Zhao
- Yantai Key Laboratory of Functional Fibers and Textiles, Shandong Nanshan Fashion Sci-Tech Co., Ltd., Postdoctoral workstation of Nanshan Group Co., Ltd., Longkou 265706, China
| | - Yuanyuan Yin
- Institute of Functional Textiles and Advanced Materials, Center for Advanced Fire-Safety Materials D & A (Shandong), College of Textiles & Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China; Yantai Key Laboratory of Functional Fibers and Textiles, Shandong Nanshan Fashion Sci-Tech Co., Ltd., Postdoctoral workstation of Nanshan Group Co., Ltd., Longkou 265706, China.
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3
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Sivaraman D, Nagel Y, Siqueira G, Chansoria P, Avaro J, Neels A, Nyström G, Sun Z, Wang J, Pan Z, Iglesias-Mejuto A, Ardao I, García-González CA, Li M, Wu T, Lattuada M, Malfait WJ, Zhao S. Additive Manufacturing of Nanocellulose Aerogels with Structure-Oriented Thermal, Mechanical, and Biological Properties. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2307921. [PMID: 38477181 DOI: 10.1002/advs.202307921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 02/09/2024] [Indexed: 03/14/2024]
Abstract
Additive manufacturing (AM) is widely recognized as a versatile tool for achieving complex geometries and customized functionalities in designed materials. However, the challenge lies in selecting an appropriate AM method that simultaneously realizes desired microstructures and macroscopic geometrical designs in a single sample. This study presents a direct ink writing method for 3D printing intricate, high-fidelity macroscopic cellulose aerogel forms. The resulting aerogels exhibit tunable anisotropic mechanical and thermal characteristics by incorporating fibers of different length scales into the hydrogel inks. The alignment of nanofibers significantly enhances mechanical strength and thermal resistance, leading to higher thermal conductivities in the longitudinal direction (65 mW m-1 K-1 ) compared to the transverse direction (24 mW m-1 K-1 ). Moreover, the rehydration of printed cellulose aerogels for biomedical applications preserves their high surface area (≈300 m2 g-1 ) while significantly improving mechanical properties in the transverse direction. These printed cellulose aerogels demonstrate excellent cellular viability (>90% for NIH/3T3 fibroblasts) and exhibit robust antibacterial activity through in situ-grown silver nanoparticles.
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Affiliation(s)
- Deeptanshu Sivaraman
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
- Department of Chemistry, University of Fribourg, Fribourg, 1700, Switzerland
| | - Yannick Nagel
- Cellulose and Wood Materials Laboratory, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Gilberto Siqueira
- Cellulose and Wood Materials Laboratory, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Parth Chansoria
- Department of Health Science and Technology, ETH Zürich, Zürich, 8092, Switzerland
| | - Jonathan Avaro
- Center for X-ray Analytics, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Antonia Neels
- Department of Chemistry, University of Fribourg, Fribourg, 1700, Switzerland
- Center for X-ray Analytics, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Gustav Nyström
- Cellulose and Wood Materials Laboratory, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
- Department of Health Science and Technology, ETH Zürich, Zürich, 8092, Switzerland
| | - Zhaoxia Sun
- Institute of Environmental Engineering, ETH Zürich, Zürich, 8092, Switzerland
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
- Laboratory for Advanced Analytical Technologies, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Jing Wang
- Institute of Environmental Engineering, ETH Zürich, Zürich, 8092, Switzerland
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
- Laboratory for Advanced Analytical Technologies, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Zhengyuan Pan
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Ana Iglesias-Mejuto
- AerogelsLab, I+D Farma Group (GI-1645), Department of Pharmacology, Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela, Santiago de Compostela, E-15782, Spain
| | - Inés Ardao
- BioFarma Research group, Department of Pharmacology, Pharmacy and Pharmaceutical Technology, Innopharma Drug Screening and Pharmacogenomics Platform, Centro Singular de Investigación en Medicina Molecular y Enfermedades Crónicas (CiMUS), University of Santiago de Compostela, Santiago de Compostela, E-15782, Spain
| | - Carlos A García-González
- AerogelsLab, I+D Farma Group (GI-1645), Department of Pharmacology, Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, iMATUS and Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela, Santiago de Compostela, E-15782, Spain
| | - Mengmeng Li
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Tingting Wu
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Marco Lattuada
- Department of Chemistry, University of Fribourg, Fribourg, 1700, Switzerland
| | - Wim J Malfait
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
| | - Shanyu Zhao
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, Dübendorf, 8600, Switzerland
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Sun X, Yu Q, Wang F, Hu S, Zhou J, Liu Y, Jiang Z, Wang X, Yu Y, Yang H, Wang C. Sustainable lignocellulose aerogel for air purifier with thermal insulation, flame retardancy, mechanical strength, and its life cycle assessment. Int J Biol Macromol 2024; 257:128599. [PMID: 38056738 DOI: 10.1016/j.ijbiomac.2023.128599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 12/01/2023] [Accepted: 12/02/2023] [Indexed: 12/08/2023]
Abstract
High-performance biomass materials with good thermal insulation, flame retardrancy, and mechanical properties are urgently required for thermal management. Herein, a novel lignocellulose aerogel treated using a recyclable deep eutectic solvent (DES) was physically mixed with tourmaline particles (TPs) to enhance its structural stability, flame retardancy, and mechanical properties. The optimized TPs-modified lignocellulose aerogel (TLA-4) had good comprehensive performances due to the synergistic effect of ammonium sulfate and TPs. Compared with TPs-free lignocellulose aerogel (LA), the total heat release (THR) and heat release rate (HRR) of TLA-4 were reduced by 62.0 % and 66.3 %, respectively, and the limiting oxygen index (LOI) of TLA-4 was drastically enhanced by 74.1 %. TLA-4 also exhibited a low thermal conductivity of 29.67 mW/mK, showing favorable thermal insulation performance. When compressed to 5 %, the mechanical strength of TLA-4 increased by 8.3 times. Meanwhile, the presence of TPs and abundant pores in the aerogel contributed to the release of negative oxygen ions (NOIs), aiding air purification. A life cycle assessment (LCA) indicated that this composite had a minimal environmental impact (EI) in 17 categories compared to other similar aerogels. The proposed strategy for preparing an environment-friendly lignocellulose aerogel offers significant potential for applications in home decoration and building materials.
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Affiliation(s)
- Xiaohan Sun
- Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, PR China
| | - Qianqian Yu
- College of Chemistry and Bioengineering, Hechi University, Hechi 546300, PR China
| | - Fangmiao Wang
- Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, PR China
| | - Senwei Hu
- Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, PR China
| | - Jiazuo Zhou
- Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, PR China
| | - Yifan Liu
- Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, PR China
| | - Zishuai Jiang
- Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, PR China
| | - Xin Wang
- Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, PR China
| | - Yuan Yu
- Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, PR China
| | - Haiyue Yang
- Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, PR China.
| | - Chengyu Wang
- Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, PR China.
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Malfait WJ, Ebert HP, Brunner S, Wernery J, Galmarini S, Zhao S, Reichenauer G. The poor reliability of thermal conductivity data in the aerogel literature: a call to action! JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY 2024; 109:569-579. [PMID: 38419740 PMCID: PMC10896818 DOI: 10.1007/s10971-023-06282-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 11/26/2023] [Indexed: 03/02/2024]
Abstract
Aerogels are an exciting class of materials with record-breaking properties including, in some cases, ultra-low thermal conductivities. The last decade has seen a veritable explosion in aerogel research and industry R&D, leading to the synthesis of aerogels from a variety of materials for a rapidly expanding range of applications. However, both from the research side, and certainly from a market perspective, thermal insulation remains the dominant application. Unfortunately, continued progress in this area suffers from the proliferation of incorrect thermal conductivity data, with values that often are far outside of what is possible within the physical limitations. This loss of credibility in reported thermal conductivity data poses difficulties in comparing the thermal performance of different types of aerogels and other thermal superinsulators, may set back further scientific progress, and hinder technology transfer to industry and society. Here, we have compiled 519 thermal conductivity results from 87 research papers, encompassing silica, other inorganic, biopolymer and synthetic polymer aerogels, to highlight the extent of the problem. Thermal conductivity data outside of what is physically possible are common, even in high profile journals and from the world's best universities and institutes. Both steady-state and transient methods can provide accurate thermal conductivity data with proper instrumentation, suitable sample materials and experienced users, but nearly all implausible data derive from transient methods, and hot disk measurements in particular, indicating that under unfavorable circumstances, and in the context of aerogel research, transient methods are more prone to return unreliable data. Guidelines on how to acquire reliable thermal conductivity data are provided. This paper is a call to authors, reviewers, editors and readers to exercise caution and skepticism when they report, publish or interpret thermal conductivity data. Graphical Abstract
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Affiliation(s)
- Wim J. Malfait
- Laboratory for Building Energy Materials and Components, Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
| | | | - Samuel Brunner
- Laboratory for Building Energy Materials and Components, Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
| | - Jannis Wernery
- Laboratory for Building Energy Materials and Components, Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
| | - Sandra Galmarini
- Laboratory for Building Energy Materials and Components, Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
| | - Shanyu Zhao
- Laboratory for Building Energy Materials and Components, Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
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Wang M, Miao X, Hou C, Xu K, Ke Z, Dai F, Liu M, Li H, Chen C. Devisable pore structures and tunable thermal management properties of aerogels composed of carbon nanotubes and cellulose nanofibers with various aspect ratios. Carbohydr Polym 2024; 323:121437. [PMID: 37940302 DOI: 10.1016/j.carbpol.2023.121437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/06/2023] [Accepted: 09/26/2023] [Indexed: 11/10/2023]
Abstract
The anisotropic cellulose nanofiber (CNF)/carbon nanotube (CNT) aerogels hold a great promise in directional applications due to their distinct xylem-like aligned penetrating pore structures. The aspect ratio of CNF plays a crucial role in the pore structures of aerogels, directly dominating the final macroscopic properties of materials. Herein, three types of CNF with different aspect ratios were extracted through the 2,2,6,6-tetrmethylpiperidine-1-oxyl radical (TEMPO) oxidation process by changing the doses of oxidant. The corresponding anisotropic CNF/CNT aerogels were prepared by the unidirectional freeze-drying method and then their pore morphologies and properties were investigated in detail. The resulting aerogel with the shortest aspect ratio of CNF exhibited the densest porous structure, thereby obtaining the highest compressive strength of 110 kPa and elastic modulus of 383 kPa, while that containing the longest CNF possessed the highest thermal conductivity coefficient of 0.17 W m-1 K-1 and the worst thermal insulation. This research explored the relationship between the properties of the CNF/CNT aerogels and devisable pore structures caused by various aspect ratios of CNF, thus providing a new insight into the development of CNF/CNT aerogels with tunable performances.
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Affiliation(s)
- Mengxia Wang
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
| | - Xiaran Miao
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China.
| | - Chen Hou
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
| | - Ke Xu
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
| | - Zhao Ke
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
| | - Fengna Dai
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
| | - Mingyuan Liu
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China
| | - Hui Li
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
| | - Chunhai Chen
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.
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Zhang Y, Zhu P, Sun H, Sun X, Ye Y, Jiang F. Superelastic Cellulose Sub-Micron Fibers/Carbon Black Aerogel for Highly Sensitive Pressure Sensing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2310038. [PMID: 37963847 DOI: 10.1002/smll.202310038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Indexed: 11/16/2023]
Abstract
Superelastic aerogels with rapid response and recovery times, as well as exceptional shape recovery performance even from large deformation, are in high demand for wearable sensor applications. In this study, a novel conductive and superelastic cellulose-based aerogel is successfully developed. The aerogel incorporates networks of cellulose sub-micron fibers and carbon black (SMF/CB) nanoparticles, achieved through a combination of dual ice templating assembly and electrostatic assembly methods. The incorporation of assembled cellulose sub-micron fibers imparts remarkable superelasticity to the aerogel, enabling it to retain 94.6% of its original height even after undergoing 10 000 compression/recovery cycles. Furthermore, the electrostatically assembled CB nanoparticles contribute to exceptional electrical conductivity in the cellulose-based aerogel. This combination of electrical conductivity and superelasticity results in an impressive response time of 7.7 ms and a recovery time of 12.8 ms for the SMF/CB aerogel, surpassing many of the aerogel sensors reported in previous studies. As a proof of concept, the SMF/CB aerogel is utilized to construct a pressure sensor and a sensing array, which exhibit exceptional responsiveness to both minor and substantial human motions, indicating its significant potential for applications in human health monitoring and human-machine interaction.
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Affiliation(s)
- Yifan Zhang
- Sustainable Functional Biomaterials Laboratory, Department of Wood Science, The University of British Columbia, Vancouver, V6T 1Z4, Canada
| | - Penghui Zhu
- Sustainable Functional Biomaterials Laboratory, Department of Wood Science, The University of British Columbia, Vancouver, V6T 1Z4, Canada
| | - Hao Sun
- Sustainable Functional Biomaterials Laboratory, Department of Wood Science, The University of British Columbia, Vancouver, V6T 1Z4, Canada
| | - Xia Sun
- Sustainable Functional Biomaterials Laboratory, Department of Wood Science, The University of British Columbia, Vancouver, V6T 1Z4, Canada
| | - Yuhang Ye
- Sustainable Functional Biomaterials Laboratory, Department of Wood Science, The University of British Columbia, Vancouver, V6T 1Z4, Canada
| | - Feng Jiang
- Sustainable Functional Biomaterials Laboratory, Department of Wood Science, The University of British Columbia, Vancouver, V6T 1Z4, Canada
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Takeshita S, Ono T. Biopolymer-Polysiloxane Double Network Aerogels. Angew Chem Int Ed Engl 2023; 62:e202306518. [PMID: 37466360 DOI: 10.1002/anie.202306518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Indexed: 07/20/2023]
Abstract
A new series of transparent aerogels of biopolymer-polysiloxane double networks is reported. Biopolymer aerogels have attracted much attention from green and sustainable aspects but suffered from strong hydrophilicity and difficulty to make homogeneous structures in nanoscale; these drawbacks are overcome by compositing with a polysiloxane network. Alginate-polymethylsilsesquioxane aerogel has high optical transparency, water repellency, comparable superinsulation property and improved bending flexibility compared to pure polymethylsilsesquioxane aerogel. The nanoscale homogeneity is realized by separating the crosslinking steps for two networks in a sequential protocol: condensation of siloxane bonds and metal-crosslinking of biopolymer. The crosslinking order, biopolymer-first or siloxane-first, and universality/limitation of biopolymer-crosslinker pairs are discussed to construct fundamental chemistry of double network systems for their further application potentials.
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Affiliation(s)
- Satoru Takeshita
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, 3058565, Tsukuba, Japan
| | - Takumi Ono
- Research Institute for Chemical Process Technology, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, 3058565, Tsukuba, Japan
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Ganguly A, Nag S, Gayen K. Synthesis of cellulosic and nano-cellulosic aerogel from lignocellulosic materials for diverse sustainable applications: a review. Prep Biochem Biotechnol 2023; 54:419-434. [PMID: 37603307 DOI: 10.1080/10826068.2023.2245875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
Cellulosic aerogels are sustainable, biodegradable, and ultra-light porous materials with three-dimensional networks having high specific surface area. Depending on the source of precursor materials, they are categorized into plant-based aerogel, bacterial cellulosic aerogel. Different types of aerogels are also produced from microcrystalline cellulose (MCC), nanocrystalline cellulose (NCC), cellulose microfibril (CMF) and cellulose nanofibril (CNF). Furthermore, inorganic and organic substances are embedded to produce hybrid aerogel or composite aerogel for the enhancement of its performance in various fields. Mixing, gelation, solvent exchange, and drying (e.g., super critical carbon dioxide or freeze drying) are the basic steps involved in cellulosic aerogel synthesis. Based on the composition of precursors during aerogel synthesis, cellulosic aerogels have broad applications in various fields such as adsorbents, electrodes, sensors, captive deionization materials, catalysts, drug delivery, thermal and sound insulating materials. This review provided consolidated information on: (i) classification of cellulosic aerogels based on the sources of raw materials, (ii) processes involved to produce the cellulosic aerogel, (iii) cellulosic aerogel synthesized from MCC, NCC, CMF and CNF, (iv) nano particle doped cellulosic aerogel, and (v) its application in various field with future perspectives.
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Affiliation(s)
- Anisha Ganguly
- Department of Chemical Engineering, National Institute of Technology, Agartala, India
| | - Soma Nag
- Department of Chemical Engineering, National Institute of Technology, Agartala, India
| | - Kalyan Gayen
- Department of Chemical Engineering, National Institute of Technology, Agartala, India
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Garemark J, Perea-Buceta JE, Felhofer M, Chen B, Cortes Ruiz MF, Sapouna I, Gierlinger N, Kilpeläinen IA, Berglund LA, Li Y. Strong, Shape-Memory Lignocellulosic Aerogel via Wood Cell Wall Nanoscale Reassembly. ACS NANO 2023; 17:4775-4789. [PMID: 36716432 PMCID: PMC10018770 DOI: 10.1021/acsnano.2c11220] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
Polymer shape-memory aerogels (PSMAs) are prospects in various fields of application ranging from aerospace to biomedicine, as advanced thermal insulators, actuators, or sensors. However, the fabrication of PSMAs with good mechanical performance is challenging and is currently dominated by fossil-based polymers. In this work, strong, shape-memory bio-aerogels with high specific surface areas (up to 220 m2/g) and low radial thermal conductivity (0.042 W/mK) were prepared through a one-step treatment of native wood using an ionic liquid mixture of [MTBD]+[MMP]-/DMSO. The aerogel showed similar chemical composition similar to native wood. Nanoscale spatial rearrangement of wood biopolymers in the cell wall and lumen was achieved, resulting in flexible hydrogels, offering design freedom for subsequent aerogels with intricate geometries. Shape-memory function under stimuli of water was reported. The chemical composition and distribution, morphology, and mechanical performance of the aerogel were carefully studied using confocal Raman spectroscopy, AFM, SAXS/WAXS, NMR, digital image correlation, etc. With its simplicity, sustainability, and the broad range of applicability, the methodology developed for nanoscale reassembly of wood is an advancement for the design of biobased shape-memory 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-10044Stockholm, Sweden
| | - Jesús E. Perea-Buceta
- Materials
Chemistry Division, Department of Chemistry, Faculty of Science, University of Helsinki, 00560Helsinki, Finland
| | - Martin Felhofer
- Department
of Nanobiotechnology, Institute of Biophysics, University of Natural Resources and Life Sciences, 1190Vienna, Austria
| | - Bin Chen
- Wallenberg
Wood Science Center, Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, SE-10044Stockholm, Sweden
| | - Maria F. Cortes Ruiz
- Wallenberg
Wood Science Center, Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, SE-10044Stockholm, Sweden
| | - Ioanna Sapouna
- Wallenberg
Wood Science Center, Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, SE-10044Stockholm, Sweden
- Division
of Glycoscience, Department of Chemistry, KTH Royal Institute of Technology, AlbaNova
University Centre, 106 91Stockholm, Sweden
| | - Notburga Gierlinger
- Department
of Nanobiotechnology, Institute of Biophysics, University of Natural Resources and Life Sciences, 1190Vienna, Austria
| | - Ilkka Antero Kilpeläinen
- Materials
Chemistry Division, Department of Chemistry, Faculty of Science, University of Helsinki, 00560Helsinki, Finland
| | - Lars A. Berglund
- Wallenberg
Wood Science Center, Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, SE-10044Stockholm, Sweden
| | - Yuanyuan Li
- Wallenberg
Wood Science Center, Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, SE-10044Stockholm, Sweden
| |
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