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Wierzchowski K, Nowak B, Kawka M, Sykłowska-Baranek K, Pilarek M. Effect of Silica Xerogel Functionalization on Intensification of Rindera graeca Transgenic Roots Proliferation and Boosting Naphthoquinone Production. Life (Basel) 2024; 14:159. [PMID: 38276288 PMCID: PMC10817608 DOI: 10.3390/life14010159] [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: 11/29/2023] [Revised: 01/15/2024] [Accepted: 01/20/2024] [Indexed: 01/27/2024] Open
Abstract
Secondary metabolites derived from plants are recognized as valuable products with several successful applications in the pharmaceutical, cosmetic, and food industries. The major limitation to the broader implementation of these compounds is their low manufacturing efficiency. Current efforts to overcome unprofitability depend mainly on biotechnological methods, especially through the application of plant in vitro cultures. This concept allows unprecedented bioengineering opportunities for culture system modifications with in situ product removal. The silica-based xerogels can be used as a novel, porous biomaterial characterized by a large surface area and high affinity to lipophilic secondary metabolites produced by plant tissue. This study aimed to investigate the influence of xerogel-based biomaterials functionalized with methyl, hydroxyl, carboxylic, and amine groups on Rindera graeca transgenic root growth and the production of naphthoquinone derivatives. The application of xerogel-based scaffolds functionalized with the methyl group resulted in more than 1.5 times higher biomass proliferation than for reference untreated culture. The naphthoquinone derivatives' production was noted exclusively in culture systems supplemented with xerogel functionalized with methyl and hydroxyl groups. Applying chemically functionalized xerogels as in situ adsorbents allowed for the enhanced growth and productivity of in vitro cultured R. graeca transgenic roots, facilitating product isolation due to their selective and efficient accumulation.
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Affiliation(s)
- Kamil Wierzchowski
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645 Warsaw, Poland; (K.W.); (B.N.)
| | - Bartosz Nowak
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645 Warsaw, Poland; (K.W.); (B.N.)
| | - Mateusz Kawka
- Department of Pharmaceutical Biology, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland; (M.K.); (K.S.-B.)
| | - Katarzyna Sykłowska-Baranek
- Department of Pharmaceutical Biology, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland; (M.K.); (K.S.-B.)
| | - Maciej Pilarek
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645 Warsaw, Poland; (K.W.); (B.N.)
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2
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Zemke F, Gonthier J, Scoppola E, Simon U, Bekheet MF, Wagermaier W, Gurlo A. Origin of the Springback Effect in Ambient-Pressure-Dried Silica Aerogels: The Effect of Surface Silylation. Gels 2023; 9:gels9020160. [PMID: 36826330 PMCID: PMC9956377 DOI: 10.3390/gels9020160] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 02/19/2023] Open
Abstract
Ambient pressure drying (APD) can prospectively reduce the costs of aerogel fabrication and processing. APD relies solely on preventing shrinkage or making it reversible. The latter, i.e., the aerogel re-expansion after drying (so-called springback effect-SBE), needs to be controlled for reproducible aerogel fabrication by APD. This can be achieved by an appropriate surface functionalization of aerogel materials (e.g., SiO2). This work addresses the fabrication of monolithic SiO2 aerogels and xerogels by APD. The effect of several silylation agents, i.e., trimethylchlorosilane, triethylchlorosilane, and hexamethyldisilazane on the SBE is studied in detail, applying several complementary experimental techniques, allowing the evaluation of the macroscopic and microscopic morphology as well as the composition of SiO2 aerogels. Here, we show that some physical properties, e.g., the bulk density, the macroscopic structure, and pore sizes/volumes, were significantly affected by the re-expansion. However, silylation did not necessarily lead to full re-expansion. Therefore, similarities in the molecular composition could not be equated to similarities in the SBE. The influences of steric hindrance and reactivity are discussed. The impact of silylation is crucial in tailoring the SBE and, as a result, the APD of monolithic aerogels.
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Affiliation(s)
- Fabian Zemke
- Chair of Advanced Ceramic Materials, Institute of Materials Science and Technology, Faculty III Process Sciences, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
- Correspondence: ; Tel.: +49-(0)30-314-22653
| | - Julien Gonthier
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Ernesto Scoppola
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Ulla Simon
- Chair of Advanced Ceramic Materials, Institute of Materials Science and Technology, Faculty III Process Sciences, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Maged F. Bekheet
- Chair of Advanced Ceramic Materials, Institute of Materials Science and Technology, Faculty III Process Sciences, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Wolfgang Wagermaier
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Aleksander Gurlo
- Chair of Advanced Ceramic Materials, Institute of Materials Science and Technology, Faculty III Process Sciences, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
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3
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Dayarian S, Majedi Far H, Yang L. Macroporous Polyimide Aerogels: A Comparison between Powder Microparticles Synthesized via Wet Gel Grinding and Emulsion Processes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1804-1814. [PMID: 36706272 PMCID: PMC9910053 DOI: 10.1021/acs.langmuir.2c02696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 01/14/2023] [Indexed: 06/18/2023]
Abstract
It is noteworthy to mention that synthesizing the polyimide aerogel powder, which is carried out in this study, benefits from two advantages: (i) the powder particles can be used for some specific applications where the monolith is not suitable and (ii) there is a possibility to investigate how a polyimide aerogel monolith can be made through the polyimide powder to reduce its cost and cycle time. In this study, two straightforward methods, wet gel grinding and emulsion, are introduced to prepare polyimide aerogel powders using ambient pressure drying. The microscopic properties of interest, including skeletal and porous structures, microparticle size and assembly, combined with macroscopic properties such as thermal stabilities and conductivities (0.039 W/m·K), confirm that the fabricated microparticles with a size in the range of 7-20 μm and porosity in the range of 65-85% are thermally stable up to 500 °C.
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Affiliation(s)
- Shima Dayarian
- Department
of Mechanical and Aerospace Engineering, University of Strathclyde, 75 Montrose Street, GlasgowG1 1XJ, United
Kingdom
| | - Hojat Majedi Far
- Blueshift
Materials Inc., Spencer, Massachusetts01562, United States
| | - Liu Yang
- Department
of Mechanical and Aerospace Engineering, University of Strathclyde, 75 Montrose Street, GlasgowG1 1XJ, United
Kingdom
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4
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Sun Y, Chen W, Zhou X. Thermal insulation fibers with a Kevlar aerogel core and a porous Nomex shell. RSC Adv 2021; 11:34828-34835. [PMID: 35494778 PMCID: PMC9042689 DOI: 10.1039/d1ra06846f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 10/21/2021] [Indexed: 12/26/2022] Open
Abstract
Kevlar aerogel fibers which inherit the aerogel's brilliant properties of low density, high porosity and large surface area are promising candidates for thermal insulation applications in textiles. To enhance the mechanical strength of Kevlar aerogel fibers, an extra Nomex shell was introduced by a simple coaxial-wet-spinning approach. The resultant coaxial fibers were observed to have a Kevlar aerogel core and a porous Nomex shell. Besides, there also formed an air gap between the core and the shell. This multi-layered coaxial structure with numerous pores inside contributes to the excellent thermal insulation performance of the fibers and their fabrics. The temperature differences between the hot plate and the outer surface of the fabrics were measured to be as high as 80 °C when exposed to a temperature of 300 °C. In addition, these fibers also performed well in thermal stability, and almost did not decompose before 380 °C. Not only that, the breaking strength of the Nomex shell can be up to twice that of the Kevlar core, resulting in a significant improvement in the fiber's mechanical strength. It can be envisaged that the developed coaxial fibers with excellent thermal insulation and endurance properties as well as improved mechanical strength may have broad prospects for thermal insulation at high temperatures.
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Affiliation(s)
- Yueyan Sun
- Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response, Civil Aviation University of China Tianjin 300300 P. R. China
| | - Weiwang Chen
- Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response, Civil Aviation University of China Tianjin 300300 P. R. China
| | - Xiaomeng Zhou
- Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response, Civil Aviation University of China Tianjin 300300 P. R. China
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5
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Walker RC, Potochniak AE, Hyer AP, Ferri JK. Zirconia aerogels for thermal management: Review of synthesis, processing, and properties information architecture. Adv Colloid Interface Sci 2021; 295:102464. [PMID: 34364134 DOI: 10.1016/j.cis.2021.102464] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/03/2021] [Accepted: 06/04/2021] [Indexed: 01/24/2023]
Abstract
Zirconia aerogels are porous nanomaterials with high specific surface areas and low thermal conductivities that are suitable for a wide range of functions. The applications of zirconia aerogels include numerous uses in thermal management systems that are specifically beneficial in aeronautics and aerospace systems. This review seeks to detail the synthesis, processing, and characterization of these unique materials. However, the many distinctive synthesis pathways and processing conditions of zirconia aerogels can make the optimization of these materials difficult, potentially inhibiting further development. Independent variables in the synthesis process alone include zirconium precursor, rare earth stabilizer, solvent system, gelation agent, and surfactant templating agent. If only two distinct options were available for each synthetic variable, there would be up to 32 different synthetic pathways; if there were three options for each variable, 243 different synthetic pathways would be possible. Apart from the gel synthesis, processing conditions, including drying method, drying temperature, drying solvent, and sintering temperature, as well as various techniques used to characterize aerogels, need to be considered. To mitigate the sheer volume of synthetic parameters, this review uses an architected information structure to contemplate approximately 600 aerogel materials, along with the synthesis and processing conditions that make each material unique. By utilizing this information structure, containing over 10,000 relationships amongst 3,800 nodes, the connection between specific properties of zirconia aerogels and the pathways used to produce them can be more easily visualized, leading to a more effective understanding of the many variables that are used in the synthesis and processing of these materials. This review seeks to utilize data science in a way that can elucidate structure-property relationships in colloidal chemistry, providing a more efficient way to evaluate the synthesis and processing of materials with high experimental dimensionality.
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Affiliation(s)
- Rebecca C Walker
- Department of Chemical & Life Science Engineering, Virginia Commonwealth University, Richmond, VA, United States of America
| | - Anna E Potochniak
- Department of Chemical & Life Science Engineering, Virginia Commonwealth University, Richmond, VA, United States of America
| | - Andres P Hyer
- Department of Chemical & Life Science Engineering, Virginia Commonwealth University, Richmond, VA, United States of America
| | - James K Ferri
- Department of Chemical & Life Science Engineering, Virginia Commonwealth University, Richmond, VA, United States of America.
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6
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Wang J, Du Y, Wang J, Gong W, Xu L, Yan L, You Y, Lu W, Zhang X. Silica Aerogels with Self-Reinforced Microstructure for Bioinspired Hydrogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:5923-5931. [PMID: 33939442 DOI: 10.1021/acs.langmuir.1c00476] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Aerogel is a kind of high-performance lightweight open-porous solids with ultralow density, high specific surface area, and broad application in many emerging fields including biotechnology, energy, environment, aerospace, etc. A giant challenge remains in preventing of the hydrophilic aerogel framework shrinkage when replacing of solvent with air in its extremely abundant nanosized pores during its fabrication process in ambient conditions. In this work, started from a linear polymeric precursor with further condensation reaction, superhydrophilic silica aerogels with self-reinforced microstructure and the least volume shrinkage have been successfully obtained via ambient pressure drying process without use of any additives in the presence of a low surface tension solvent. The resulting superhydrophilic silica aerogels possess specific surface area up to 1065 m2/g, pore volume up to 2.17 cm3/g and density down to 84 mg/cm3, and these values are comparable to those of their counterparts obtained by supercritical CO2 drying process. Moreover, as an application demonstration, the bioinspired hydrogels with desirable mechanical flexibility and adhesive performance at extremely harsh environment (e.g., below -50 °C) have been successfully synthesized by mimicking carrier of a functional bioagent with the resulting superhydrophilic silica aerogel microparticles. Our work has made a significant step forward for future high-performance hydrophilic aerogels with self-enhanced microstructures and the resulting superhydrophilic aerogels have shown great potentials in making functional hydrogels with bionic properties.
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Affiliation(s)
- Jinpei Wang
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
- Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, China
| | - Yu Du
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, P.R. China
| | - Jin Wang
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Wenbin Gong
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Liang Xu
- Nanjing Engineering Institute of Aircraft Systems, AVIC/Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration, Nanjing, 211102, P.R. China
| | - Lifeng Yan
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Yezi You
- Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Weibang Lu
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Xuetong Zhang
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
- Department of Surgical Biotechnology, Division of Surgery & Interventional Science, University College London, London, NW3 2PF, U.K
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7
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Shah N, Rehan T, Li X, Tetik H, Yang G, Zhao K, Lin D. Magnetic aerogel: an advanced material of high importance. RSC Adv 2021; 11:7187-7204. [PMID: 35423256 PMCID: PMC8695117 DOI: 10.1039/d0ra10275j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 01/12/2021] [Indexed: 12/27/2022] Open
Abstract
Magnetic materials have brought innovations in the field of advanced materials. Their incorporation in aerogels has certainly broadened their application area. Magnetic aerogels can be used for various purposes from adsorbents to developing electromagnetic interference shielding and microwave absorbing materials, high-level diagnostic tools, therapeutic systems, and so on. Considering the final use and cost, these can be fabricated from a variety of materials using different approaches. To date, several studies have been published reporting the fabrication and uses of magnetic aerogels. However, to our knowledge, there is no review that specifically focuses only on magnetic aerogels, so we attempted to overview the main developments in this field and ended our study with the conclusion that magnetic aerogels are one of the emerging and futuristic advanced materials with the potential to offer multiple applications of high value.
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Affiliation(s)
- Nasrullah Shah
- Department of Industrial and Manufacturing Systems Engineering, Kansas State University Manhattan KS 66506 USA +1-765-2372200 +1-785-4911492
- Department of Chemistry, Abdul Wali Khan University Mardan Mardan KP 23200 Pakistan
| | - Touseef Rehan
- Department of Biochemistry, Quaid-i-Azam University Islamabad 24000 Pakistan
| | - Xuemue Li
- Department of Industrial and Manufacturing Systems Engineering, Kansas State University Manhattan KS 66506 USA +1-765-2372200 +1-785-4911492
- Key Laboratory of High Efficiency and Clean Mechanical Engineering, Shandong University Jinan 250061 China
| | - Halil Tetik
- Department of Industrial and Manufacturing Systems Engineering, Kansas State University Manhattan KS 66506 USA +1-765-2372200 +1-785-4911492
| | - Guang Yang
- Department of Industrial and Manufacturing Systems Engineering, Kansas State University Manhattan KS 66506 USA +1-765-2372200 +1-785-4911492
| | - Keren Zhao
- Department of Industrial and Manufacturing Systems Engineering, Kansas State University Manhattan KS 66506 USA +1-765-2372200 +1-785-4911492
| | - Dong Lin
- Department of Industrial and Manufacturing Systems Engineering, Kansas State University Manhattan KS 66506 USA +1-765-2372200 +1-785-4911492
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8
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Liu Z, Liu L, Zhong Z, Ran Y, Xi J, Wang J. Ultralight hybrid silica aerogels derived from supramolecular hydrogels self-assembled from insoluble nano building blocks. RSC Adv 2021; 11:7331-7337. [PMID: 35423243 PMCID: PMC8695017 DOI: 10.1039/d1ra00418b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 02/06/2021] [Indexed: 11/21/2022] Open
Abstract
Supramolecular hydrogels are a type of hydrogel cross-linked by non-chemical bonds and they have been widely applied in the field of smart systems, sensors, tissue engineering, and controlled drug delivery. Most supramolecular hydrogels are formed by soluble molecules, polymers, and metal ions. In this work, supramolecular hydrogels self-assembled between two insoluble nano building blocks (ISNBBs), graphene oxide (GO) and amino-functionalized silica nanoparticles (SiO2-NH2), have been discovered and synthesized. The gelation conditions of the two ISNBBs have been investigated. A step further, ultralight hybrid silica aerogels are obtained by supercritical drying of the physical hydrogels. No visible volume shrinkage is observed, due to the fact that the hydrogel networks are formed by rigid ISNBBs. Thus the hybrid aerogels possess ultralow density (down to 7.5 mg cm-3), high specific surface areas (178.6 m2 g-1), and extremely high porosity (99.6%). The present work shows an alternative strategy to design and synthesize supramolecular hydrogels and aerogels using predetermined building blocks, together with designable morphology and physical properties for the target aerogels.
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Affiliation(s)
- Zongjian Liu
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University Beijing 100144 P. R. China
| | - Ling Liu
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences Suzhou 215123 P. R. China
| | - Zhenggen Zhong
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences Suzhou 215123 P. R. China
| | - Yuanyuan Ran
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University Beijing 100144 P. R. China
| | - Jianing Xi
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University Beijing 100144 P. R. China
| | - Jin Wang
- Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences Suzhou 215123 P. R. China
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9
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Wang J, Wang J. Advances on Dimensional Structure Designs and Functional Applications of Aerogels. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a20110531] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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10
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Alekseev ES, Alentiev AY, Belova AS, Bogdan VI, Bogdan TV, Bystrova AV, Gafarova ER, Golubeva EN, Grebenik EA, Gromov OI, Davankov VA, Zlotin SG, Kiselev MG, Koklin AE, Kononevich YN, Lazhko AE, Lunin VV, Lyubimov SE, Martyanov ON, Mishanin II, Muzafarov AM, Nesterov NS, Nikolaev AY, Oparin RD, Parenago OO, Parenago OP, Pokusaeva YA, Ronova IA, Solovieva AB, Temnikov MN, Timashev PS, Turova OV, Filatova EV, Philippov AA, Chibiryaev AM, Shalygin AS. Supercritical fluids in chemistry. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4932] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Liu Z, Ran Y, Xi J, Wang J. Polymeric hybrid aerogels and their biomedical applications. SOFT MATTER 2020; 16:9160-9175. [PMID: 32851389 DOI: 10.1039/d0sm01261k] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Aerogels are a class of porous materials that possess extremely high specific surface area, high pore volume, high porosity, and variable chemical structures. They have been widely applied in the fields of aerospace, chemical engineering, construction, electrotechnics, and biomedicine. In recent years a great boom in aerogels has been observed, where various new aerogels with novel physicochemical properties and functions have been synthesized. Nevertheless, native aerogels with a single component normally face severe problems such as low mechanical strength and lack of functions. One strategy to solve the problems is to construct hybrid aerogels. In this study, a comprehensive review on polymer based hybrid aerogels is presented, including polymer-polymer, polymer-carbon material, and polymer-inorganic hybrid aerogels, which will be introduced and discussed in view of their chemical structures and hybrid structures. Most importantly, polymeric hybrid aerogels are classified into three different composition levels, which are molecular-level, molecular-aggregate-level, and aggregate-level, due to the fact that hybrid aerogels with the same chemical structures but with different composition levels might show quite different functions or properties. The biomedical applications of these hybrid aerogels will also be reviewed and discussed, where the polymeric components in the hybrid aerogels provide the main contribution. This review would provide creative design principles for aerogels by considering both their chemical and physical structures.
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Affiliation(s)
- Zongjian Liu
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P. R. China.
| | - Yuanyuan Ran
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P. R. China.
| | - Jianing Xi
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P. R. China.
| | - Jin Wang
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China. and Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Chinese Academy of Sciences, Suzhou 215123, P. R. China
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12
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Lee DH, Jo MJ, Han SW, Yu S, Park H. Polyimide aerogel with controlled porosity: Solvent-induced synergistic pore development during solvent exchange process. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122879] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Li X, Wang J, Zhao Y, Zhang X. Superhydrophobic polyimide aerogels via conformal coating strategy with excellent underwater performances. J Appl Polym Sci 2020. [DOI: 10.1002/app.48849] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xin Li
- School of Materials Science and EngineeringBeijing Institute of Technology Beijing 100081 People's Republic of China
- Suzhou Institute of Nano‐Tech and Nano‐BionicsChinese Academy of Sciences Suzhou 215123 People's Republic of China
| | - Jin Wang
- Suzhou Institute of Nano‐Tech and Nano‐BionicsChinese Academy of Sciences Suzhou 215123 People's Republic of China
| | - Yibo Zhao
- Aerospace Research Institute of Materials and Processing Technology Beijing 100076 People's Republic of China
| | - Xuetong Zhang
- Suzhou Institute of Nano‐Tech and Nano‐BionicsChinese Academy of Sciences Suzhou 215123 People's Republic of China
- Department of Surgical Biotechnology, Division of Surgery & Interventional ScienceUniversity College London London NW3 2PF United Kingdom
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14
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The Effect of the Co‐Solvent on the Aerogel Formation Directly in Supercritical CO
2
Medium. ChemistrySelect 2020. [DOI: 10.1002/slct.201904936] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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15
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Liu R, Wang J, Du Y, Liao J, Zhang X. Phase-separation induced synthesis of superhydrophobic silica aerogel powders and granules. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.120971] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Lyu J, Li G, Liu M, Zhang X. Aerogel-Directed Energy-Storage Films with Thermally Stimulant Multiresponsiveness. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:943-949. [PMID: 30609377 DOI: 10.1021/acs.langmuir.8b04028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Phase change materials offer enormous potential for thermal energy storage due to their high latent heat and chemical stability. Researchers have developed numerous innovative strategies to overcome the leakage of organic phase change materials and enhance thermal performance. However, the manufacture of form-stable, free-standing energy storage films based on phase change materials with high latent heat remains difficult. Therefore, the present study focused on the production of free-standing, form-stable energy storage films with high phase-change enthalpy and thermally stimulant multiresponsiveness from the simple composite of paraffin with a polytetrafluoroethylene/silica (PTFE/SiO2) aerogel framework, where paraffin was effectively confined in PTFE/SiO2. The resulting paraffin/PTFE/SiO2 films exhibited a large phase change enthalpy (128 J/g) at a paraffin content of 62.8 wt %. The temperature-dependent wettability, transmittance, and mechanical properties of this composite film have also been investigated.
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Affiliation(s)
- Jing Lyu
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215123 , China
| | - Guangyong Li
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215123 , China
| | - Meinan Liu
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215123 , China
| | - Xuetong Zhang
- Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences , Suzhou 215123 , China
- Division of Surgery & Interventional Science , University College London , London , NW3 2PF , U.K
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17
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Simple and fast method for producing flexible superhydrophobic aerogels by direct formation of thiol-ene networks in scCO2. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.01.067] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Surfactant-free synthesis of silica aerogel microspheres with hierarchically porous structure. J Colloid Interface Sci 2018; 515:1-9. [PMID: 29324269 DOI: 10.1016/j.jcis.2018.01.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 12/23/2017] [Accepted: 01/03/2018] [Indexed: 11/21/2022]
Abstract
In this work, we developed a new method to synthesize silica aerogel microspheres via ambient pressure drying (APD) process without applying any surfactants and mechanical stirring. An ethanol solution of partially hydrolyzed, partially condensed silica (CS) was used as precursor in the synthesis, the water-repellent n-Heptane as solvent, while the water-soluble ammonia gas (NH3) as catalyst. After a fast sol-gel process and APD process, aerogel microspheres were obtained in the form of white powder with packing density ranged from 62 mg/cm3 to 230 mg/cm3 for different samples. The SEM images exhibited fine spherical morphology for these aerogel microparticles, and their statistical average particle diameter ranged from 0.8 μm to 1.5 μm. Besides, according to the analysis of N2 adsorption-desorption isotherms, the BET surface area of these aerogel microspheres was in the range of 800-960 m2/g, and a considerable volume of micropores was detected along with the abundant mesospores in these microspheres, which was further confirmed by the TEM image and SAXS curve. Based on the very limited solubility of NH3 in the reaction system, a non-emulsion formation mechanism was proposed to illustrate the formation of these aerogel microspheres.
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Júlio MF, Ilharco LM. Ambient Pressure Hybrid Silica Monoliths with Hexamethyldisilazane: From Vitreous Hydrophilic Xerogels to Superhydrophobic Aerogels. ACS OMEGA 2017; 2:5060-5070. [PMID: 31457783 PMCID: PMC6641688 DOI: 10.1021/acsomega.7b00893] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 08/14/2017] [Indexed: 06/10/2023]
Abstract
Hybrid silica-based monoliths were synthesized at ambient pressure, using minimum amounts of the silylating agent hexamethyldisilazane (HMDZ). Depending on the synthesis approach, the materials ranged from dense and vitreous xerogels to transparent and superhydrophobic aerogels. Emphasis was given to understanding the role of the silylating agent, its content and incorporation process on the final morphology, and properties of the xerogels/aerogels. It is proven that as a coprecursor, increasing HMDZ content contributes to increase the lipophilic/hydrophilic balance, induce high surface areas, and decrease densities, but there is a maximum usable content for producing monoliths. Conversely, as a postsynthesis modifier, there is an optimum HMDZ content that maximizes hydrophobicity (water contact angle of ∼144°) and induces high surface area (∼700 m2·g-1), keeping the density low (∼300 kg·m-3). It is proven that the aging period in the hydrophobizing solution is a crucial parameter. The most superhydrophobic xerogels were obtained using HMDZ as a postsynthesis modifier, achieving values of water contact angles as high as ∼173°, at the cost of density increase to ∼600 kg·m-3 and decrease of the surface area to ∼300 m2·g-1. The best compromise between low density, high surface area, and superhydrophobicity is obtained using HMDZ both as a coprecursor and as a postsynthesis modifier, in a low HMDZ/tetraethoxysilane total molar ratio (<0.2), with an aging period of 16-24 h. The use of subcritical drying, along with the minimization of the expensive organic modifier quantities, allows envisaging a safe and low-cost large-scale production of a variety of materials, including superhydrophobic aerogels with potential distinctive applications.
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Borba A, Vareda JP, Durães L, Portugal A, Simões PN. Spectroscopic characterization of silica aerogels prepared using several precursors – effect on the formation of molecular clusters. NEW J CHEM 2017. [DOI: 10.1039/c7nj01082f] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The structural and spectroscopic properties of silica aerogels were studied using complementary approaches, such as Fourier transform infrared spectroscopy and solid-state NMR spectroscopy.
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Affiliation(s)
- A. Borba
- CIEPQPF – Department of Chemical Engineering
- University of Coimbra
- P-3030-790 Coimbra
- Portugal
| | - J. P. Vareda
- CIEPQPF – Department of Chemical Engineering
- University of Coimbra
- P-3030-790 Coimbra
- Portugal
| | - L. Durães
- CIEPQPF – Department of Chemical Engineering
- University of Coimbra
- P-3030-790 Coimbra
- Portugal
| | - A. Portugal
- CIEPQPF – Department of Chemical Engineering
- University of Coimbra
- P-3030-790 Coimbra
- Portugal
| | - P. N. Simões
- CIEPQPF – Department of Chemical Engineering
- University of Coimbra
- P-3030-790 Coimbra
- Portugal
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21
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Wei Y, Wang J, Zhang Y, Wang L, Zhang X. Autocatalytic synthesis of molecular-bridged silica aerogels with excellent absorption and super elasticity. RSC Adv 2015. [DOI: 10.1039/c5ra19776g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A catalyst-free approach to synthesize molecular-bridged silica aerogels with excellent absorption performance and super elasticity was proposed.
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Affiliation(s)
- Yong Wei
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- P. R. China
- Suzhou Institute of Nano-Tech and Nano-Bionics
| | - Jin Wang
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou
- P. R. China
| | - Yulu Zhang
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou
- P. R. China
| | - Lin Wang
- School of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
- P. R. China
| | - Xuetong Zhang
- Suzhou Institute of Nano-Tech and Nano-Bionics
- Chinese Academy of Sciences
- Suzhou
- P. R. China
- School of Materials Science and Engineering
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22
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Zong S, Wei W, Jiang Z, Yan Z, Zhu J, Xie J. Characterization and comparison of uniform hydrophilic/hydrophobic transparent silica aerogel beads: skeleton strength and surface modification. RSC Adv 2015. [DOI: 10.1039/c5ra08714g] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This preparation method of skeleton improvement of wet silica beads by ambient pressure drying is suitable for economic and large-scale industrial production of silica aerogel beads.
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Affiliation(s)
- Sekai Zong
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Wei Wei
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
- Center of Analysis and Test
| | - Zhifeng Jiang
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Zaoxue Yan
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Jianjun Zhu
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Jimin Xie
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
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