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Dong Y, Zou F, Vapaavuori J. Variable-transmittance bio-based phase change composites based on the photothermal property of pectin. Carbohydr Polym 2024; 343:122416. [PMID: 39174112 DOI: 10.1016/j.carbpol.2024.122416] [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: 02/09/2024] [Revised: 05/08/2024] [Accepted: 06/16/2024] [Indexed: 08/24/2024]
Abstract
In this study, the possibility of using a natural polysaccharide, pectin, in a novel function as a photothermal material was investigated by fabricating a Pectin/Polyethylene glycol (PEG)/Poly(methyl methacrylate) (PMMA) composite via the infiltration of PEG/PMMA polymer mixture into freeze-casted pectin cryogel template. The Pectin/PEG/PMMA composite has high latent heat of 48 J/g, excellent UV blocking ability, and tailorable transmittance as well as capacity to energy storage via photothermal heating to the melting point of PEG under sunlight. The photothermal effect can be enhanced with the increase of pectin concentration and irradiation intensity. Furthermore, by using the Pectin/PEG/PMMA composite as a window of a model house could effectively reduce the temperature rise inside the house under irradiation and reduce the temperature drop after turning off the irradiation, as compared to a model house with conventional glass as the window material. Therefore, this work provides a new application of pectin as photothermal material and opens the opportunity to develop novel sustainable bio-based photothermal materials.
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Affiliation(s)
- Yujiao Dong
- Department of Chemistry and Materials Science, Aalto University, Kemistintie 1, 02150 Espoo, Finland.
| | - Fangxin Zou
- Department of Chemistry and Materials Science, Aalto University, Kemistintie 1, 02150 Espoo, Finland.
| | - Jaana Vapaavuori
- Department of Chemistry and Materials Science, Aalto University, Kemistintie 1, 02150 Espoo, Finland.
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2
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Groult S, Buwalda S, Budtova T. Tuning bio-aerogel properties. Part 3: Exploring silica-pectin composite aerogels for drug delivery. BIOMATERIALS ADVANCES 2024; 163:213954. [PMID: 38996543 DOI: 10.1016/j.bioadv.2024.213954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 07/03/2024] [Accepted: 07/05/2024] [Indexed: 07/14/2024]
Abstract
The release of the model drug theophylline from silica-pectin aerogels was investigated. The composite aerogels were prepared via impregnation of pectin alcogels with silica sol, followed by in situ silica gelation and drying with supercritical CO2. The structural and physico-chemical properties of the aerogels were tuned via the preparation conditions (type of silica sol, calcium crosslinking of pectin or not). Theophylline was loaded via impregnation and its release into simulated gastric fluid was studied during 1 h followed by release into simulated intestinal fluid. The swelling, mass loss and theophylline release behavior of the composites were analyzed and correlated with material properties. It followed that only aerogels prepared with calcium-crosslinked pectin and polyethoxydisiloxane were stable in aqueous systems, exhibiting a slow theophylline release governed by near-Fickian diffusion.
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Affiliation(s)
- Sophie Groult
- MINES Paris, PSL University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France
| | - Sytze Buwalda
- MINES Paris, PSL University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France
| | - Tatiana Budtova
- MINES Paris, PSL University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France.
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3
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Wang G, Qi G, Hu C, Zhang X, Liu W, Guo Z, Ru Y, Zhang L, Wei Z, Wang X, Jiang C, Li B, Han P, Qiao J. Superelastic Polymer Aerogel with Superamphiphilicity. ACS APPLIED MATERIALS & INTERFACES 2024; 16:42762-42771. [PMID: 39096245 DOI: 10.1021/acsami.4c09383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/05/2024]
Abstract
Elastic aerogels have become a research hot spot in both academia and industry recently. The reported elastic aerogels are all made of hard materials by controlling their shapes. Herein we report an elastic aerogel made of a polymer elastomer with entropy elasticity. In the aerogel, cross-linked carboxyl nitrile rubber nanoparticles with hydrophilicity are dispersed in hydrophobic derivative of styrene-maleic anhydride alternating copolymer, forming a very special micro-nano surface structure with hydrophilic protrusions and hydrophobic depressions on the aerogel wall; therefore, the aerogel is not only superelastic but also superamphiphilic. A leak-free phase-change composite was prepared using the aerogel and paraffin, which can maintain at phase change temperature of paraffin for a longer time than the traditional one. The aerogel is also extremely suitable for desalination evaporators in solar-driven interfacial evaporation technology due to its superamphiphilicity, superelasticity, and ability to absorb sunlight. Exceptional evaporation rate of 2.78 kg·m-2·h-1 and evaporation efficiency of 170% could be reached even without using expensive light-absorbing materials. The evaporation rate exceeds that of most evaporators with expensive light-absorbing materials, and the evaporation efficiency exceeds the theoretical limit of conventional 2D solar evaporators. Both the phase-change composite and the evaporator can be easily recovered because the novel superelastic aerogel reported in this work is also recyclable.
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Affiliation(s)
- Guoyu Wang
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Guicun Qi
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Chenxi Hu
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Xiaohong Zhang
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Wenlu Liu
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Zhaoyan Guo
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Yue Ru
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Liangdong Zhang
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Zhong Wei
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Xiang Wang
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Chao Jiang
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Binghai Li
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Peng Han
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
| | - Jinliang Qiao
- SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, P. R. China
- SINOPEC (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, P. R. China
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4
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De la Cruz LG, Abt T, León N, Sánchez-Soto M. Radially and Axially Oriented Ammonium Alginate Aerogels Modified with Clay/Tannic Acid and Crosslinked with Glutaraldehyde. Gels 2024; 10:526. [PMID: 39195055 DOI: 10.3390/gels10080526] [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: 07/16/2024] [Revised: 08/07/2024] [Accepted: 08/08/2024] [Indexed: 08/29/2024] Open
Abstract
Lightweight materials that combine high mechanical strength, insulation, and fire resistance are of great interest to many industries. This work explores the properties of environmentally friendly alginate aerogel composites as potential sustainable alternatives to petroleum-based materials. This study analyzes the effects of two additives (tannic acid and montmorillonite clay), the orientation that results during casting, and the crosslinking of the biopolymer with glutaraldehyde on the properties of the aerogel composites. The prepared aerogels exhibited high porosities between 90% and 97% and densities in the range of 0.059-0.191 g/cm3. Crosslinking increased the density and resulted in excellent performance under loading conditions. In combination with axial orientation, Young's modulus and yield strength reached values as high as 305 MPa·cm3/g and 7 MPa·cm3/g, respectively. Moreover, the alginate-based aerogels exhibited very low thermal conductivities, ranging from 0.038 W/m·K to 0.053 W/m·K. Compared to pristine alginate, the aerogel composites' thermal degradation rate decreased substantially, enhancing thermal stability. Although glutaraldehyde promoted combustion, the non-crosslinked aerogel composites demonstrated high fire resistance. No flame was observed in these samples under cone calorimeter radiation, and a minuscule peak of heat release of 21 kW/m2 was emitted as a result of their highly efficient graphitization and fire suppression. The combination of properties of these bio-based aerogels demonstrates their potential as substituents for their fossil-based counterparts.
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Affiliation(s)
- Lucía G De la Cruz
- Centre Català del Plàstic, Universitat Politècnica de Catalunya, Barcelona Tech (EEBE-UPC), Av. d'Eduard Maristany, 16, 08019 Barcelona, Spain
| | - Tobias Abt
- Centre Català del Plàstic, Universitat Politècnica de Catalunya, Barcelona Tech (EEBE-UPC), Av. d'Eduard Maristany, 16, 08019 Barcelona, Spain
| | - Noel León
- Centre Català del Plàstic, Universitat Politècnica de Catalunya, Barcelona Tech (EEBE-UPC), Av. d'Eduard Maristany, 16, 08019 Barcelona, Spain
| | - Miguel Sánchez-Soto
- Centre Català del Plàstic, Universitat Politècnica de Catalunya, Barcelona Tech (EEBE-UPC), Av. d'Eduard Maristany, 16, 08019 Barcelona, Spain
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Ma YS, Kuo FM, Liu TH, Lin YT, Yu J, Wei Y. Exploring keratin composition variability for sustainable thermal insulator design. Int J Biol Macromol 2024; 275:133690. [PMID: 38971280 DOI: 10.1016/j.ijbiomac.2024.133690] [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: 03/10/2024] [Revised: 06/18/2024] [Accepted: 07/03/2024] [Indexed: 07/08/2024]
Abstract
In pursuing sustainable thermal insulation solutions, this study explores the integration of human hair and feather keratin with alginate. The aim is to assess its potential in thermal insulation materials, focusing on the resultant composites' thermal and mechanical characteristics. The investigation uncovers that the type and proportion of keratin significantly influence the composites' porosity and thermal conductivity. Specifically, higher feather keratin content is associated with lesser sulfur and reduced crosslinking due to shorter amino acids, leading to increased porosity and pore sizes. This, in turn, results in a decrease in β-structured hydrogen bond networks, raising non-ordered protein structures and diminishing thermal conductivity from 0.044 W/(m·K) for pure alginate matrices to between 0.033 and 0.038 W/(m·K) for keratin-alginate composites, contingent upon the specific ratio of feather to hair keratin used. Mechanical evaluations further indicate that composites with a higher ratio of hair keratin exhibit an enhanced compressive modulus, ranging from 60 to 77 kPa, demonstrating the potential for tailored mechanical properties to suit various applications. The research underscores the critical role of sulfur content and the crosslinking index within keratin's structures, significantly impacting the thermal and mechanical properties of the matrices. The findings position keratin-based composites as environmentally friendly alternatives to traditional insulation materials.
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Affiliation(s)
- Yu-Shuan Ma
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei 106, Taiwan
| | - Fang-Mei Kuo
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei 106, Taiwan
| | - Tai-Hung Liu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Yu-Ting Lin
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, College of Engineering, National Taiwan University, Taipei 106, Taiwan.
| | - Yang Wei
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei 106, Taiwan; High-value Biomaterials Research and Commercialization Center, National Taipei University of Technology, Taipei, 10608, Taiwan.
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6
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Mandić V, Bafti A, Panžić I, Radovanović-Perić F. Bio-Based Aerogels in Energy Storage Systems. Gels 2024; 10:438. [PMID: 39057461 PMCID: PMC11275867 DOI: 10.3390/gels10070438] [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: 05/20/2024] [Revised: 06/14/2024] [Accepted: 06/27/2024] [Indexed: 07/28/2024] Open
Abstract
Bio-aerogels have emerged as promising materials for energy storage, providing a sustainable alternative to conventional aerogels. This review addresses their syntheses, properties, and characterization challenges for use in energy storage devices such as rechargeable batteries, supercapacitors, and fuel cells. Derived from renewable sources (such as cellulose, lignin, and chitosan), bio-based aerogels exhibit mesoporosity, high specific surface area, biocompatibility, and biodegradability, making them advantageous for environmental sustainability. Bio-based aerogels serve as electrodes and separators in energy storage systems, offering desirable properties such as high specific surface area, porosity, and good electrical conductivity, enhancing the energy density, power density, and cycle life of devices. Recent advancements highlight their potential as anode materials for lithium-ion batteries, replacing non-renewable carbon materials. Studies have shown excellent cycling stability and rate performance for bio-aerogels in supercapacitors and fuel cells. The yield properties of these materials, primarily porosity and transport phenomena, demand advanced characterization methods, and their synthesis and processing methods significantly influence their production, e.g., sol-gel and advanced drying. Bio-aerogels represent a sustainable solution for advancing energy storage technologies, despite challenges such as scalability, standardization, and cost-effectiveness. Future research aims to improve synthesis methods and explore novel applications. Bio-aerogels, in general, provide a healthier path to technological progress.
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Affiliation(s)
- Vilko Mandić
- Faculty of Chemical Engineering and Technology, University of Zagreb, Trg Marka Marulića 19, 10000 Zagreb, Croatia; (I.P.); (F.R.-P.)
| | - Arijeta Bafti
- Faculty of Chemical Engineering and Technology, University of Zagreb, Trg Marka Marulića 19, 10000 Zagreb, Croatia; (I.P.); (F.R.-P.)
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7
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Effraimopoulou E, Jaxel J, Budtova T, Rigacci A. Hydrophobic Modification of Pectin Aerogels via Chemical Vapor Deposition. Polymers (Basel) 2024; 16:1628. [PMID: 38931978 PMCID: PMC11207865 DOI: 10.3390/polym16121628] [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: 05/01/2024] [Revised: 05/31/2024] [Accepted: 06/04/2024] [Indexed: 06/28/2024] Open
Abstract
Pectin aerogels, with very low density (around 0.1 g cm-3) and high specific surface area (up to 600 m2 g-1), are excellent thermal insulation materials since their thermal conductivity is below that of air at ambient conditions (0.025 W m-1 K-1). However, due to their intrinsic hydrophilicity, pectin aerogels collapse when in contact with water vapor, losing superinsulating properties. In this work, first, pectin aerogels were made, and the influence of the different process parameters on the materials' structure and properties were studied. All neat pectin aerogels had a low density (0.04-0.11 g cm-1), high specific surface area (308-567 m2 g-1), and very low thermal conductivity (0.015-0.023 W m-1 K-1). Then, pectin aerogels were hydrophobized via the chemical vapor deposition of methyltrimethoxysilane using different reaction durations (2 to 24 h). The influence of hydrophobization on material properties, especially on thermal conductivity, was recorded by conditioning in a climate chamber (25 °C, 80% relative humidity). Hydrophobization resulted in the increase in thermal conductivity compared to that of neat pectin aerogels. MTMS deposition for 16 h was efficient for hydrophobizing pectin aerogels in moist environment (contact angle 115°) and stabilizing material properties with no fluctuation in thermal conductivity (0.030 W m-1 K-1) and density for the testing period of 8 months.
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Affiliation(s)
- Eleni Effraimopoulou
- Mines Paris, PSL University, Centre for Processes, Renewable Energy and Energy Systems (PERSEE), 06904 Sophia Antipolis, France; (E.E.); (J.J.)
- Mines Paris, PSL University, Centre for Materials Forming (CEMEF), UMR CNRS 7635, 06904 Sophia Antipolis, France
| | - Julien Jaxel
- Mines Paris, PSL University, Centre for Processes, Renewable Energy and Energy Systems (PERSEE), 06904 Sophia Antipolis, France; (E.E.); (J.J.)
| | - Tatiana Budtova
- Mines Paris, PSL University, Centre for Materials Forming (CEMEF), UMR CNRS 7635, 06904 Sophia Antipolis, France
| | - Arnaud Rigacci
- Mines Paris, PSL University, Centre for Processes, Renewable Energy and Energy Systems (PERSEE), 06904 Sophia Antipolis, France; (E.E.); (J.J.)
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8
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Huang Z, Zhang Y, Xing T, He A, Luo Y, Wang M, Qiao S, Tong A, Shi Z, Liao X, Pan H, Liang Z, Chen F, Xu W. Advances in regenerated cellulosic aerogel from waste cotton textile for emerging multidimensional applications. Int J Biol Macromol 2024; 270:132462. [PMID: 38772470 DOI: 10.1016/j.ijbiomac.2024.132462] [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: 03/19/2024] [Revised: 04/22/2024] [Accepted: 05/11/2024] [Indexed: 05/23/2024]
Abstract
Rapid development of society and the improvement of people's living standards have stimulated people's keen interest in fashion clothing. This trend has led to the acceleration of new product innovation and the shortening of the lifespan for cotton fabrics, which has resulting in the accumulation of waste cotton textiles. Although cotton fibers can be degraded naturally, direct disposal not only causes a serious resource waste, but also brings serious environmental problems. Hence, it is significant to explore a cleaner and greener waste textile treatment method in the context of green and sustainable development. To realize the high-value utilization of cellulose II aerogel derived from waste cotton products, great efforts have been made and considerable progress has been achieved in the past few decades. However, few reviews systematically summarize the research progress and future challenges of preparing high-value-added regenerated cellulose aerogels via dissolving cotton and other cellulose wastes. Therefore, this article reviews the regenerated cellulose aerogels obtained through solvent methods, summarizes their structure, preparation strategies and application, aimed to promote the development of the waste textile industry and contributed to the realization of carbon neutrality.
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Affiliation(s)
- Zhiyu Huang
- College of Textiles and Clothing, Qingdao University, Qingdao 266071, PR China; State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
| | - Yu Zhang
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
| | - Tonghe Xing
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
| | - Annan He
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
| | - Yuxin Luo
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
| | - Mengqi Wang
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
| | - Sijie Qiao
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
| | - Aixin Tong
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
| | - Zhicheng Shi
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
| | - Xiaohong Liao
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
| | - Heng Pan
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China.
| | - Zihui Liang
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China.
| | - Fengxiang Chen
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China.
| | - Weilin Xu
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies and Hubei Key Laboratory of Digital Textile Equipment, Wuhan Textile University, Wuhan 430200, PR China
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Zhou H, Wei X, Liu A, Wang S, Chen B, Chen Z, Lyu M, Guo W, Cao X, Ye M. Tough Hydro-Aerogels with Cation Specificity Enabled Ultra-High Stability for Multifunctional Sensing and Quasi-Solid-State Electrolyte Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2313088. [PMID: 38308465 DOI: 10.1002/adma.202313088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/30/2024] [Indexed: 02/04/2024]
Abstract
The anion-specific effects of the salting-in and salting-out phenomena are extensively observed in hydrogels, whereas the cation specificity of hydrogels is rarely reported. Herein, a multi-step strategy including borax pre-gelation, saline soaking, freeze-drying, and rehydrating is developed to fabricate polyvinyl alcohol gels with cation specificity, exhibiting the specific ordering of effects on the mechanical properties of gels as Ca2+ > Li+ > Mg2+ >> Fe3+ > Cu2+ >> Co2+ ≈ Ni2+ ≈ Zn2+. The multiple effects of the fabrication strategy, including the electrostatic repulsion among cations, skeleton support function of graphene oxide nanosheets, and water absorption and retention of ions, endow the gels with the dual characteristics of hydrogels and aerogels (i.e., hydro-aerogels). The hydro-aerogels prepared with the cationic salting-out effect display attractive pressure sensing performance with excellent stability over 90 days and enable continuous monitoring of ambient humidity in real-time and effective work in seawater to detect various parameters (e.g., depth, salinity, and temperature). The hydro-aerogels prepared without borax pretreatment or using the cationic salting-in effect can serve as quasi-solid-state electrolytes in supercapacitors, with 99.59% capacitance retention after 10 000 cycles. This study realizes cation specificity in hydrogels and designs multifunctional hydro-aerogels for promising applications in various fields.
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Affiliation(s)
- Hao Zhou
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Xiaohan Wei
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Andeng Liu
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Senjing Wang
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Bingqi Chen
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Zhuomin Chen
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Miaoqiang Lyu
- Nanomaterials Centre, Australian Institute for Bioengineering and Nanotechnology, School of Chemical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Wenxi Guo
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Xuezheng Cao
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
| | - Meidan Ye
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
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10
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Xu H, Zhang Z, Jiang W, Fang X, Xia Z, Niu H, Zhou H. Multifunctional amphibious superhydrophilic-oleophobic cellulose nanofiber aerogels for oil and water purification. Carbohydr Polym 2024; 330:121774. [PMID: 38368091 DOI: 10.1016/j.carbpol.2023.121774] [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: 09/24/2023] [Revised: 12/29/2023] [Accepted: 12/30/2023] [Indexed: 02/19/2024]
Abstract
Aerogels are of a popular choice for oil-water separation and water purification due to their attractive properties, such as lightweight, large surface area, and high porosity. Developing robust aerogels with multifunctional characteristics is highly desirable but remains challenging nowadays. Herein, we develop a facile one-pot condensation strategy for the fabrication of superhydrophilic-oleophobic (SHI-OP) composite aerogels using cellulose nanofibers (CNF), 3-glycidy-loxypropyl trimethoxysilane (GPTMS), polyethyleneimine (PEI) and fluorine-contained compound (FS-60). The resulted aerogels exhibit a directional lamellar structure with interconnected macropores, super-lightweight with high porosity of 98.30 % and low density of 0.0256 g·cm-3. Also, the aerogels are mechanically durable against repeated compression. Meanwhile, the amphibious SHI-OP feature of the composite aerogels in both air and water states enables them to not only absorb trace amount of water from contaminated oils, but also separate oil-water mixtures with separation efficiency of over 99 % and high permeation flux of over 9060 L/m2·h. Moreover, the aerogels also show excellent dye adsorption capability and reusability toward anionic dyes with a maximum adsorption capacity of 1245.68 mg/g. Such robust and multifunctional aerogels with special surface wettability provide good opportunity for liquid purification and dye-containing wastewater treatment.
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Affiliation(s)
- Hao Xu
- Laboratory for Manufacturing Low Carbon and Functionalized Textiles in the Universities of Shandong Province/State Key Laboratory for Bio-Fibers and Eco-Textiles, College of Textiles & Clothing, Qingdao University, Qingdao 266071, China; Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education Collaborative, Qingdao University, Qingdao 266071, China
| | - Zhong Zhang
- Laboratory for Manufacturing Low Carbon and Functionalized Textiles in the Universities of Shandong Province/State Key Laboratory for Bio-Fibers and Eco-Textiles, College of Textiles & Clothing, Qingdao University, Qingdao 266071, China; Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education Collaborative, Qingdao University, Qingdao 266071, China
| | - Wei Jiang
- Laboratory for Manufacturing Low Carbon and Functionalized Textiles in the Universities of Shandong Province/State Key Laboratory for Bio-Fibers and Eco-Textiles, College of Textiles & Clothing, Qingdao University, Qingdao 266071, China
| | - Xinrui Fang
- Laboratory for Manufacturing Low Carbon and Functionalized Textiles in the Universities of Shandong Province/State Key Laboratory for Bio-Fibers and Eco-Textiles, College of Textiles & Clothing, Qingdao University, Qingdao 266071, China; Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education Collaborative, Qingdao University, Qingdao 266071, China
| | - Zhigang Xia
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
| | - Haitao Niu
- Laboratory for Manufacturing Low Carbon and Functionalized Textiles in the Universities of Shandong Province/State Key Laboratory for Bio-Fibers and Eco-Textiles, College of Textiles & Clothing, Qingdao University, Qingdao 266071, China; Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education Collaborative, Qingdao University, Qingdao 266071, China
| | - Hua Zhou
- Laboratory for Manufacturing Low Carbon and Functionalized Textiles in the Universities of Shandong Province/State Key Laboratory for Bio-Fibers and Eco-Textiles, College of Textiles & Clothing, Qingdao University, Qingdao 266071, China; Collaborative Innovation Center for Eco-textiles of Shandong Province and the Ministry of Education Collaborative, Qingdao University, Qingdao 266071, China.
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11
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Guan F, Feng S, Sun J, Yang Q, Zhang Y, Li Z, Tao J, Ji X, Wang Y, Bao D, Guo J, Zhang S. Low-temperature superelastic, anisotropic, silane-crosslinked sodium alginate aerogel for thermal insulation. Int J Biol Macromol 2024; 262:129800. [PMID: 38296125 DOI: 10.1016/j.ijbiomac.2024.129800] [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: 11/28/2023] [Revised: 01/23/2024] [Accepted: 01/25/2024] [Indexed: 02/13/2024]
Abstract
Bio-aerogels have attracted much attention owing to their remarkable properties, but their brittle and poor elasticity has limited their further applications. Here, we propose a strategy of in-situ silanization crosslinking combined with unidirectional freeze casting (SUFC) to prepare superelastic sodium alginate (SA) aerogels. The resulting aerogel was ultra-light (0.048 g/cm3), high porosity (96.86 %), and self-extinguishing from fire. Aerogels exhibited anisotropic properties, such as low-temperature elasticity (500 g compression at -70 °C 10-cycle, 99.6 % recovery), exceptional fatigue resistance (100-cycle at 50 % strain), and excellent thermal insulation (0.0696 W·m-1·K-1). Thus, the SUFC strategy provides considerable freedom for constructing multi-material, lamellar/honeycomb structured alginate-based aerogels, which pave the way to thermal insulation development at low temperatures.
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Affiliation(s)
- Fucheng Guan
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China; Key Laboratory of Textile Fiber and Products (Wuhan Textile University), Ministry of Education, Wuhan 430200, China
| | - Shi Feng
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jianbin Sun
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Qiang Yang
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Yihang Zhang
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Zheng Li
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jing Tao
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Xinbin Ji
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Yonghe Wang
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Da Bao
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jing Guo
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China.
| | - Sen Zhang
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
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12
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Niu H, Xiao Z, Zhang P, Guo W, Hu Y, Wang X. Flame retardant, heat insulating and hydrophobic chitosan-derived aerogels for the clean-up of hazardous chemicals. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168261. [PMID: 37918752 DOI: 10.1016/j.scitotenv.2023.168261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/18/2023] [Accepted: 10/30/2023] [Indexed: 11/04/2023]
Abstract
Leakage of hazardous chemicals often causes significant casualties, enormous economic losses, and negative social benefits. Presently, fire rescue personnel lack efficient and eco-friendly disposal materials for hazardous chemical leakage accidents. In this study, chitosan (CS) aerogels with excellent flame-retardant performance were prepared via cross-linking by two phosphorus-containing vanillin-based compounds (DV and TV). The as-prepared chitosan aerogels were lightweight and porous. The introduction of DV and TV greatly enhanced the residual char yields of CS at 700 °C and the flame-retardant performance of chitosan aerogels. TCS-5.0 possessed the best flame-retardant performance, indicating that TV was more effective than DV in enhancing the flame-retardant performance of chitosan aerogels. The greatly improved flame-retardant properties could be attributed to TV effectively promoting the residual char formation of chitosan aerogels and reducing the formation of combustible gas phase products. To improve the hydrophobicity of chitosan aerogels, TCS-5.0 was treated with solution immersion to load siloxane molecules on its surface. The water contact angle of HTCS-5.0 was 136.1°. HTCS-5.0 had a high oil absorption multiplicity, absorbing up to 31 times its own weight of chloroform. HTCS-5.0 could continuously absorb organic solvents on the water surface with the assistance of a vacuum pump, indicating that HTCS-5.0 could be used for the clean-up of hazardous chemical leakage accidents.
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Affiliation(s)
- Haoxin Niu
- State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China
| | - Zetao Xiao
- State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China
| | - Ping Zhang
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010, PR China
| | - Wenwen Guo
- State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China
| | - Yuan Hu
- State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China
| | - Xin Wang
- State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China.
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13
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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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14
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Sun J, Guo J, Li Y, Guan F, Zhang Y, Li Z. Guar-based aerogels with oriented lamellar structure and lightweight properties for flame-retardant and thermal insulation. Int J Biol Macromol 2024; 256:128318. [PMID: 38000610 DOI: 10.1016/j.ijbiomac.2023.128318] [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: 08/26/2023] [Revised: 10/14/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
In this study, a multi-functional guar gum aerogel with the oriented lamellar structure, which introduced sodium silicate (Na2O·nSiO2) and phytic acid (PA) as thermal insulation additives and flame-retardant agents, respectively, was fabricated via freeze drying. Our aerogel's chemical structure, morphology, and thermal and mechanical properties were analyzed. The oriented lamellar structure was attributed to the orientated growth of ice crystals, which was induced by the "silicate-guar, guar-phytate, and phytate-silicate" multiple hydrogen bonds formed between Na2O·nSiO2, PA, and guar gum. The density of the sample with 2 wt% PA could reach 0.0335 g·cm-3, and the porosity was 5 %, along with a specific pore volume of 0.8144 cm3·g-1. The mechanical properties and thermal insulation performed significant differences in the radial and axial direction of the oriented lamella (nearly 100 % resilience while 50 % deformation quantity and 0.0235 W/(m*K) of thermal conductivity in the radial direction, up to 0.079 MPa of compressive strength in the axial direction). The presence of PA attached a good flame-retardant ability to our aerogel (The Limiting Oxygen Index (LOI) was 30.77 %). This work provides a novel and promising method for developing anisotropic aerogel with excellent potential in building energy efficiency and flame-retardant.
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Affiliation(s)
- Jianbin Sun
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Jing Guo
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China; State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, China.
| | - Yi Li
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Fucheng Guan
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China.
| | - Yihang Zhang
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
| | - Zheng Li
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China
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15
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Wang P, He B, An Z, Xiao W, Song X, Yan K, Zhang J. Hollow glass microspheres embedded in porous network of chitosan aerogel used for thermal insulation and flame retardant materials. Int J Biol Macromol 2024; 256:128329. [PMID: 38000605 DOI: 10.1016/j.ijbiomac.2023.128329] [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: 08/08/2023] [Revised: 10/30/2023] [Accepted: 11/12/2023] [Indexed: 11/26/2023]
Abstract
In recent years, biopolymer aerogels as thermal insulation materials have received widespread attention due to natural abundance, cost-efficiency, and environment-friendly. However, the flammability and low strength hinder its practical application. Hollow glass microspheres (HGMs) as an inorganic thermal insulation filler have been filled in biopolymer aerogels to improve flame retardancy. However, the structure formed by HGMs embedded porous network of biopolymer aerogel has rarely been investigated, which not only reduce thermal conductivity through high porosity, but also adjust the filling volume of HGMs and achieve uniform distribution through chemical cross-linking. Herein, a biopolymer aerogel composite was assembled by chitosan aerogel (CSA) and different volume of HGMs by chemical cross-linking, freeze-drying, and silylation modification processes. When the filling volume fraction of HGMs reached 40 %, a skeleton structure was initially formed. The composites with HGMs volume of 40 %-60 % exhibited low density, high porosity, low thermal conductivity, good mechanical property, and excellent flame retardancy. According to GB 8624-2012 standard for classification, the composite with 60 % HGMs achieved class A1 non-combustible.
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Affiliation(s)
- Ping Wang
- State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Banghua He
- China University of Mining and Technology, Beijing 100083, China
| | - Zhenguo An
- State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Weixin Xiao
- State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaorui Song
- State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Kaiqi Yan
- State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Jingjie Zhang
- State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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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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17
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Furtado LM, Yee M, Fernandes R, Valera TS, Itri R, Petri DFS. Rheological and mechanical properties of hydroxypropyl methylcellulose-based hydrogels and cryogels controlled by AOT and SDS micelles. J Colloid Interface Sci 2023; 648:604-615. [PMID: 37315482 DOI: 10.1016/j.jcis.2023.06.014] [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: 04/13/2023] [Revised: 05/24/2023] [Accepted: 06/04/2023] [Indexed: 06/16/2023]
Abstract
HYPOTHESIS The type and concentration of surfactants affect the rheological behavior of hydroxypropyl methylcellulose (HPMC) chains in hydrogels, influencing the microstructure and mechanical properties of HPMC cryogels. EXPERIMENTS Hydrogels and cryogels containing HPMC, AOT (bis (2-ethylhexyl) sodium sulfosuccinate or dioctyl sulfosuccinate salt sodium, two C8 chains and sulfosuccinate head group), SDS (sodium dodecyl sulfate, one C12 chain and sulfate head group), and sodium sulfate (salt, no hydrophobic chain) at different concentrations were investigated using small-angle X-ray scattering (SAXS), scanning electron microscopy (SEM), rheological measurements, and compressive tests. FINDINGS SDS micelles bound to the HPMC chains building "bead necklaces", increasing considerably the storage modulus G' values of the hydrogels and the compressive modulus E values of the corresponding cryogels. The dangling SDS micelles promoted multiple junction points among the HPMC chains. AOT micelles and HPMC chains did not form "bead necklaces". Although AOT increased the G' values of the hydrogels, the resulting cryogels were softer than pure HPMC cryogels. The AOT micelles are probably embedded between HPMC chains. The AOT short double chains rendered softness and low friction to the cryogel cell walls. Therefore, this work demonstrated that the structure of the surfactant tail can tune the rheological behavior of HPMC hydrogels and hence the microstructure of the resulting cryogels.
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Affiliation(s)
- Laíse M Furtado
- Fundamental Chemistry Department, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, Brazil.
| | - Marcio Yee
- Marine Science Department, Federal University of São Paulo, R. Dr. Carvalho de Mendonça, 144, CEP 11070-100, Santos, SP, Brazil.
| | - Rodrigo Fernandes
- Institute of Physics, University of São Paulo, São Paulo 05508-090, Brazil.
| | - Ticiane S Valera
- Metallurgical and Materials Engineering Department, Polytechnic School, University of São Paulo, Av. Prof. Mello Moraes, 2463, CEP 05508-030, São Paulo, SP, Brazil.
| | - Rosangela Itri
- Institute of Physics, University of São Paulo, São Paulo 05508-090, Brazil.
| | - Denise F S Petri
- Fundamental Chemistry Department, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, Brazil.
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18
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Basak S, Singhal RS. The potential of supercritical drying as a “green” method for the production of food-grade bioaerogels: A comprehensive critical review. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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19
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Araujo EJS, Scopel E, Rezende CA, Martínez J. Supercritical impregnation of polyphenols from passion fruit residue in corn starch aerogels: Effect of operational parameters. J FOOD ENG 2023. [DOI: 10.1016/j.jfoodeng.2022.111394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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20
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Pontinha ADR, Mäntyneva J, Santos P, Durães L. Thermomechanical Performance Assessment of Sustainable Buildings’ Insulating Materials under Accelerated Ageing Conditions. Gels 2023; 9:gels9030241. [PMID: 36975690 PMCID: PMC10048358 DOI: 10.3390/gels9030241] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/07/2023] [Accepted: 03/14/2023] [Indexed: 03/22/2023] Open
Abstract
The reliable characterization of insulation materials in relevant environmental conditions is crucial, since it strongly influences the performance (e.g., thermal) of building elements. In fact, their properties may vary with the moisture content, temperature, ageing degradation, etc. Therefore, in this work, the thermomechanical behaviour of different materials was compared when subjected to accelerated ageing. Insulation materials that use recycled rubber in their composition were studied, along with others for comparison: heat-pressed rubber, rubber_cork composites, aerogel_rubber composite (developed by the authors), silica aerogel, and extruded polystyrene. The ageing cycles comprised dry-heat, humid-heat, and cold conditions as the stages, during cycles of 3 and 6 weeks. The materials’ properties after ageing were compared with the initial values. Aerogel-based materials showed superinsulation behaviour and good flexibility due to their very high porosity and reinforcement with fibres. Extruded polystyrene also had a low thermal conductivity but exhibited permanent deformation under compression. In general, the ageing conditions led to a very slight increase in the thermal conductivity, which vanished after drying of the samples in an oven, and to a decrease in Young’s moduli.
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Affiliation(s)
- Ana Dora Rodrigues Pontinha
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, 3004-531 Coimbra, Portugal
- Correspondence:
| | - Johanna Mäntyneva
- Häme University of Applied Sciences, HAMK Tech Research Unit, 13100 Hämeenlinna, Finland
| | - Paulo Santos
- University of Coimbra, ISISE, ARISE, Department of Civil Engineering, 3004-531 Coimbra, Portugal
| | - Luísa Durães
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, 3004-531 Coimbra, Portugal
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Mirzaei A, Javanshir S, Servati P. Thermal insulation properties of lightweight, self-healing, and mesoporous carrageenan/PMMA cryogels. RSC Adv 2023; 13:1094-1105. [PMID: 36686950 PMCID: PMC9811499 DOI: 10.1039/d2ra06333f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 12/22/2022] [Indexed: 01/06/2023] Open
Abstract
The development of new bio-based cryogel materials with low environmental impact and various properties such as self-healing, flame-retardancy, low thermal conductivity has emerged as a cutting-edge research topic in special-purpose materials and a significant challenge. Herein, we report a simple processing methodology for preparing new mesoporous light weight thermal insulation biomass hybrid cryogels based on natural and biocompatible polymers, including marine glycosaminoglycan carrageenan moss (CM) and polymethyl methacrylate (PMMA) abbreviated as CM/PMMA under cryo conditions. The mechanical, thermal, and physicochemical characterization of the obtained hybrid cryogel was studied. The effect of increasing thickness on thermal conductivity and compressive strength was investigated. The results show that the thermal conductivity increases from 0.068 W m-1 K-1 to 0.124 W m-1 K-1 with increasing thickness. Also, the compressive strength changed from 89.5% MPa to 95.4% MPa. The results revealed that cryogel has a wrinkled surface and interconnected pores and exhibits high flexibility, self-healing ability, flame retardancy, and low thermal conductivity.
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Affiliation(s)
- Akbar Mirzaei
- Pharmaceutical and Heterocyclic Compounds Research Laboratory, Chemistry Department, Iran University of Science and Technology Tehran Iran
| | - Shahrzad Javanshir
- Pharmaceutical and Heterocyclic Compounds Research Laboratory, Chemistry Department, Iran University of Science and Technology Tehran Iran
| | - Peyman Servati
- Department of Electrical and Computer Engineering, University of British Columbia Vancouver BC V6T 1Z4 Canada +98-21-77240516
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22
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Lamy-Mendes A, Pontinha ADR, Santos P, Durães L. Aerogel Composites Produced from Silica and Recycled Rubber Sols for Thermal Insulation. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7897. [PMID: 36431383 PMCID: PMC9698560 DOI: 10.3390/ma15227897] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/22/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
Hydrophobic rubber-silica aerogel panels (21.5 × 21.5 × 1.6 cm3) were fabricated from silica and rubber sols and reinforced with several fiber types (recycled tire textile fibers, polyester blanket, silica felt, glass wool). A recycled rubber sol was prepared using peracetic acid and incorporated for the first time in TEOS-based sol-gel chemistry. The composites exhibited good thermal stability up to 400 °C and very low thermal conductivity, in the superinsulation range when using polyester fibers (16.4 ± 1.0 mW·m-1·K-1), and of 20-30 mW·m-1·K-1 for the remaining fibers. They could also endure cyclic compression loads with near full recovery, thus showing very promising properties for insulation of buildings.
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Affiliation(s)
- Alyne Lamy-Mendes
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, 3030-790 Coimbra, Portugal
| | - Ana Dora Rodrigues Pontinha
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, 3030-790 Coimbra, Portugal
| | - Paulo Santos
- University of Coimbra, ISISE, Department of Civil Engineering, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal
| | - Luísa Durães
- University of Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, 3030-790 Coimbra, Portugal
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Sivaraman D, Siqueira G, Maurya AK, Zhao S, Koebel MM, Nyström G, Lattuada M, Malfait WJ. Superinsulating nanocellulose aerogels: Effect of density and nanofiber alignment. Carbohydr Polym 2022; 292:119675. [PMID: 35725170 DOI: 10.1016/j.carbpol.2022.119675] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/09/2022] [Accepted: 05/27/2022] [Indexed: 11/30/2022]
Abstract
Cellulose aerogels are potential alternatives to silica aerogels with advantages in cost, sustainability and mechanical properties. However, the density dependence of thermal conductivity (λ) for cellulose aerogels remains controversial. Cellulose aerogels were produced by gas-phase pH induced gelation of TEMPO-oxidized cellulose nanofibers (CNF) and supercritical drying. Their properties are evaluated by varying the CNF concentration (5-33 mg·cm-3) and by uniaxial compression (9-115 mg·cm-3). The aerogels are transparent with specific surface areas of ~400 m2·g-1, mesopore volumes of ~2 cm3·g-1 and a power-law dependence of the E-modulus (α ~ 1.53, and the highest reported E of ~1 MPa). The dataset confirms that λ displays a traditional U-shaped density dependence with a minimum of 18 mW·m-1·K-1 at 0.065 g·cm-3. For a given density, λ is ~5 mW·m-1·K-1 lower for compressed aerogels due to the alignment of nanofibers, confirmed by small angle X-ray scattering (SAXS).
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Affiliation(s)
- Deeptanshu Sivaraman
- Empa - Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland; Department of Chemistry, University of Fribourg, Fribourg, Switzerland.
| | - Gilberto Siqueira
- Cellulose & Wood Materials Laboratory, Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
| | - Anjani K Maurya
- Empa - Center for X-ray Analytics, Swiss Federal Laboratories for Materials Science and Technology, Empa, St. Gallen, Switzerland
| | - Shanyu Zhao
- Empa - Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
| | - Matthias M Koebel
- Empa - Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
| | - Gustav Nyström
- Cellulose & Wood Materials Laboratory, Empa - Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland; Department of Health Sciences and Technology, ETH Zürich, 8092 Zürich, Switzerland
| | - Marco Lattuada
- Department of Chemistry, University of Fribourg, Fribourg, Switzerland
| | - Wim J Malfait
- Empa - Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
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24
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Polysaccharide-Based Edible Gels as Functional Ingredients: Characterization, Applicability, and Human Health Benefits. Gels 2022; 8:gels8080524. [PMID: 36005125 PMCID: PMC9407509 DOI: 10.3390/gels8080524] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 12/16/2022] Open
Abstract
Nowadays, edible materials such as polysaccharides have gained attention due to their valuable attributes, especially gelling property. Polysaccharide-based edible gels (PEGs) can be classified as (i) hydrogels, (ii) oleogels and bigels, (iii) and aerogels, cryogels and xerogels, respectively. PEGs have different characteristics and benefits depending on the functional groups of polysaccharide chains (e.g., carboxylic, sulphonic, amino, methoxyl) and on the preparation method. However, PEGs are found in the incipient phase of research and most studies are related to their preparation, characterization, sustainable raw materials, and applicability. Furthermore, all these aspects are treated separately for each class of PEG, without offering an overview of those already obtained PEGs. The novelty of this manuscript is to offer an overview of the classification, definition, formulation, and characterization of PEGs. Furthermore, the applicability of PEGs in the food sector (e.g., food packaging, improving food profile agent, delivery systems) and in the medical/pharmaceutical sector is also critically discussed. Ultimately, the correlation between PEG consumption and polysaccharides properties for human health (e.g., intestinal microecology, "bridge effect" in obesity, gut microbiota) are critically discussed for the first time. Bigels may be valuable for use as ink for 3D food printing in personalized diets for human health treatment. PEGs have a significant role in developing smart materials as both ingredients and coatings and methods, and techniques for exploring PEGs are essential. PEGs as carriers of bioactive compounds have a demonstrated effect on obesity. All the physical, chemical, and biological interactions among PEGs and other organic and inorganic structures should be investigated.
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25
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Supercritical Fluid Technologies for the Incorporation of Synthetic and Natural Active Compounds into Materials for Drug Formulation and Delivery. Pharmaceutics 2022; 14:pharmaceutics14081670. [PMID: 36015296 PMCID: PMC9413081 DOI: 10.3390/pharmaceutics14081670] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/05/2022] [Accepted: 08/07/2022] [Indexed: 11/25/2022] Open
Abstract
Various active compounds isolated from natural sources exhibit remarkable benefits, making them attractive for pharmaceutical and biomedical applications, such as antioxidant, antimicrobial, and anti-inflammatory activities, which contribute to the treatment of cardiovascular diseases, neurodegenerative disorders, various types of cancer, diabetes, and obesity. However, their major drawbacks are their reactivity, instability, relatively poor water solubility, and consequently low bioavailability. Synthetic drugs often face similar challenges associated with inadequate solubility or burst release in gastrointestinal media, despite being otherwise a safe and effective option for the treatment of numerous diseases. Therefore, drug-eluting pharmaceutical formulations have been of great importance over the years in efforts to improve the bioavailability of active compounds by increasing their solubility and achieving their controlled release in body media. This review highlights the success of the fabrication of micro- and nanoformulations using environmentally friendly supercritical fluid technologies for the processing and incorporation of active compounds. Several novel approaches, namely micronization to produce micro- and nano-sized particles, supercritical drying to produce aerogels, supercritical foaming, and supercritical solvent impregnation, are described in detail, along with the currently available drug delivery data for these formulations.
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26
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Ice-templated additive-free porous starches with tuned morphology and properties. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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27
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Aguilera-Bulla D, Legay L, Buwalda SJ, Budtova T. Crosslinker-Free Hyaluronic Acid Aerogels. Biomacromolecules 2022; 23:2838-2845. [PMID: 35674777 DOI: 10.1021/acs.biomac.2c00207] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aerogels based on hyaluronic acid (HA) were prepared without any chemical crosslinking by polymer dissolution, network formation via nonsolvent-induced phase separation, and supercritical CO2 drying. The influence of solution pH, concentration of HA, and type of nonsolvent on network volume shrinkage, aerogel density, morphology, and specific surface area was investigated. A marked dependence of aerogel properties on solution pH was observed: aerogels with the highest specific surface area, 510 m2/g, and the lowest density, 0.057 g/cm3, were obtained when the HA solution was at its isoelectric point (pH 2.5). This work reports the first results ever on neat HA aerogels and constitutes the background for their use as advanced materials for biomedical applications.
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Affiliation(s)
- Daniel Aguilera-Bulla
- MINES Paris, PSL Research University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France
| | - Laurianne Legay
- MINES Paris, PSL Research University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France
| | - Sytze J Buwalda
- MINES Paris, PSL Research University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France
| | - Tatiana Budtova
- MINES Paris, PSL Research University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France
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28
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Song Y, Zhao Q, Qu M, Zhang R, Tang P, Bin Y, Li S, Zhao W, Wang H. Chitosan-based thermal insulation compressible foam enhanced with high performance of piezoelectric generation and sensing. Carbohydr Polym 2022; 294:119775. [DOI: 10.1016/j.carbpol.2022.119775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 06/19/2022] [Accepted: 06/21/2022] [Indexed: 11/02/2022]
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29
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Ciriminna R, Fidalgo A, Scurria A, Ilharco LM, Pagliaro M. Pectin: New science and forthcoming applications of the most valued hydrocolloid. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107483] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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30
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Groult S, Buwalda S, Budtova T. Tuning bio-aerogel properties for controlling drug delivery. Part 2: Cellulose-pectin composite aerogels. BIOMATERIALS ADVANCES 2022; 135:212732. [PMID: 35929208 DOI: 10.1016/j.bioadv.2022.212732] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/05/2022] [Accepted: 02/21/2022] [Indexed: 06/15/2023]
Abstract
The release of the model drug theophylline from cellulose-pectin composite aerogels was investigated. Cellulose and pectin formed an interpenetrated network, and the goal was to study and understand the influence of each component and its solubility in simulated gastric and intestinal fluids on the kinetics of release. Cellulose was dissolved, coagulated in water, followed by impregnation with pectin solution, crosslinking of pectin with calcium (in some cases this step was omitted), solvent exchange and supercritical CO2 drying. Theophylline was loaded via impregnation and its release into simulated gastric fluid was monitored for 1 h followed by release into simulated intestinal fluid. The properties of the composite aerogels were varied via the cellulose and pectin concentrations as well as the calcium content in the precursor solutions. The release kinetics was correlated with aerogel specific surface area, bulk density as well as network swelling and erosion. The Korsmeyer-Peppas model was employed to identify the dominant release mechanisms during the various stages of the release.
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Affiliation(s)
- Sophie Groult
- MINES ParisTech, PSL Research University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France
| | - Sytze Buwalda
- MINES ParisTech, PSL Research University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France
| | - Tatiana Budtova
- MINES ParisTech, PSL Research University, Center for Materials Forming (CEMEF), UMR CNRS 7635, CS 10207, 06904 Sophia Antipolis, France.
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31
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Yu J, Jin Y, Liu G, Hua F, Lv Y. Pickering emulsion templated strategy in composite aerogels with hierarchical porous structure improves thermal insulation and diphenylamine adsorption. J Appl Polym Sci 2022. [DOI: 10.1002/app.52130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jiangang Yu
- College of Chemical and Material Engineering Quzhou University Quzhou China
| | - Yi Jin
- College of Chemical and Material Engineering Quzhou University Quzhou China
| | - Guoqing Liu
- College of Chemical and Material Engineering Quzhou University Quzhou China
| | - Feiguo Hua
- Research and Development Center Zhejiang Jinjiahao Green Nanomaterial CO., Ltd. Quzhou China
| | - Yanwen Lv
- College of Chemical and Material Engineering Quzhou University Quzhou China
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32
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Hybrid RF-Si Xerogels: A Cost-Effective Proposal for Insulator Materials. MATERIALS 2021; 15:ma15010265. [PMID: 35009412 PMCID: PMC8745971 DOI: 10.3390/ma15010265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 12/22/2021] [Accepted: 12/27/2021] [Indexed: 01/17/2023]
Abstract
Hybrid xerogels RF/Si were synthesized by controlling the chemical variables involved in the polymerization process (i.e., molar ratios, dilution ratio, catalysts, etc.) and evaluated as insulator materials. Higher insulating performances were recorded for these hybrids compared with their counterparts made from only one of their components (i.e., RF or Si xerogels with similar porous characteristics). The analysis of chemical and structural features correlated with heat transfer methods was useful in understanding the sum of contributions involved in the thermal conductivity of RF/Si xerogels. Variables such as roughness and tortuosity can be used to improve the performance of xerogels from a different perspective. In this way, thermal conductivities of 25 mW/mK were achieved without lengthy process steps or special drying methods. Knowledge of material design and the use of microwave heating during the synthesis allowed us to approach a simple and cost-effective process. These results suggest that the hybrid materials developed in this work are a good starting point for the future of the massive production of insulation materials.
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33
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Rahmanian V, Pirzada T, Wang S, Khan SA. Cellulose-Based Hybrid Aerogels: Strategies toward Design and Functionality. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2102892. [PMID: 34608687 DOI: 10.1002/adma.202102892] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/20/2021] [Indexed: 06/13/2023]
Abstract
The brittle nature of early aerogels developed from inorganic precursors fueled the discovery of their organic counterparts. Prominent among these organics are cellulose aerogels because of their natural abundance, biocompatibility, sustainable precursors, and tunable properties. The hierarchical structure of cellulose, from polymers to nano/microfibers, further facilitates fabrication of materials across multiple length scales with added applicability. However, the inherent flammability, structural fragility, and low thermal stability have limited their use. Recently developed cellulose-based hybrid aerogels offer strong potential owing to their tunability and enhanced functionality brought about by combining the inherent properties of cellulose with organic and inorganic components. A survey of the historical background and scientific achievements in the design and development of cellulose-based hybrid aerogel materials is encompassed here. The impacts of incorporating organic and inorganic ingredients with cellulose and the corresponding synergistic effects are discussed in terms of their design and functionality. The underlying principles governing the structural integration and functionality enhancement are also analyzed. The latest developments of cellulose-based hybrid aerogels fabricated from nontraditional incipient aerogels, such as fibrous webs, are also explored. Finally, future opportunities that could make these materials achieve even greater impacts through improved scalability, rationally designed synthesis, and multifunctional properties are discussed.
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Affiliation(s)
- Vahid Rahmanian
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695-7905, USA
| | - Tahira Pirzada
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695-7905, USA
| | - Siyao Wang
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695-7905, USA
| | - Saad A Khan
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695-7905, USA
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34
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Dezotti RS, Furtado LM, Yee M, Valera TS, Balaji K, Ando RA, Petri DFS. Tuning the Mechanical and Thermal Properties of Hydroxypropyl Methylcellulose Cryogels with the Aid of Surfactants. Gels 2021; 7:gels7030118. [PMID: 34449619 PMCID: PMC8396048 DOI: 10.3390/gels7030118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/05/2021] [Accepted: 08/05/2021] [Indexed: 01/07/2023] Open
Abstract
The mechanical and thermal properties of cryogels depend on their microstructure. In this study, the microstructure of hydroxypropyl methylcellulose (HPMC) cryogels was modified by the addition of ionic (bis (2-ethylhexyl) sodium sulfosuccinate, AOT) and non-ionic (Kolliphor® EL) surfactants to the precursor hydrogels (30 g/L). The surfactant concentrations varied from 0.2 mmol/L to 3.0 mmol/L. All of the hydrogels presented viscous behavior (G″ > G′). Hydrogels containing AOT (c > 2.0 mmol/L) led to cryogels with the lowest compressive modulus (13 ± 1 kPa), the highest specific surface area (2.31 m2/g), the lowest thermal conductivity (0.030 W/(m·°C)), and less hygroscopic walls. The addition of Kolliphor® EL to the hydrogels yielded the stiffest cryogels (320 ± 32 kPa) with the lowest specific surface area (1.11 m2/g) and the highest thermal conductivity (0.055 W/(m·°C)). Density functional theory (DFT) calculations indicated an interaction energy of −31.8 kcal/mol due to the interaction between the AOT sulfonate group and the HPMC hydroxyl group and the hydrogen bond between the AOT carbonyl group and the HPMC hydroxyl group. The interaction energy between the HPMC hydroxyl group and the Kolliphor® EL hydroxyl group was calculated as −7.91 kcal/mol. A model was proposed to describe the effects of AOT or Kolliphor® EL on the microstructures and the mechanical/thermal properties of HPMC cryogels.
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Affiliation(s)
- Rafael S. Dezotti
- Fundamental Chemistry Department, Institute of Chemistry, University of São Paulo, Lineu Prestes 748, São Paulo 05508-000, SP, Brazil; (R.S.D.); (L.M.F.); (R.A.A.)
| | - Laíse M. Furtado
- Fundamental Chemistry Department, Institute of Chemistry, University of São Paulo, Lineu Prestes 748, São Paulo 05508-000, SP, Brazil; (R.S.D.); (L.M.F.); (R.A.A.)
| | - Márcio Yee
- Marine Science Department, Federal University of São Paulo, Carvalho de Mendonça 144, Santos 11070-100, SP, Brazil;
- Metallurgical and Materials Engineering Department, Polytechnic School, University of São Paulo, Mello Moraes 2463, São Paulo 05508-030, SP, Brazil;
| | - Ticiane S. Valera
- Metallurgical and Materials Engineering Department, Polytechnic School, University of São Paulo, Mello Moraes 2463, São Paulo 05508-030, SP, Brazil;
| | - Krishnasamy Balaji
- Polymer Engineering Laboratory, PSG Institute of Technology and Applied Research, Neelambur, Coimbatore 641062, India;
| | - Rômulo A. Ando
- Fundamental Chemistry Department, Institute of Chemistry, University of São Paulo, Lineu Prestes 748, São Paulo 05508-000, SP, Brazil; (R.S.D.); (L.M.F.); (R.A.A.)
| | - Denise F. S. Petri
- Fundamental Chemistry Department, Institute of Chemistry, University of São Paulo, Lineu Prestes 748, São Paulo 05508-000, SP, Brazil; (R.S.D.); (L.M.F.); (R.A.A.)
- Correspondence: ; Tel.: +55-1130919154
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