Study on the Influence of the Preparation Method of Konjac Glucomannan-Silica Aerogels on the Microstructure, Thermal Insulation, and Flame-Retardant Properties
Natural polysaccharides with high viscosity, good thermal stability, and biocompatibility can improve the mechanical properties of inorganic silica aerogels and enhance their application safety. However, the effects of the preparation methods of polysaccharide-silica aerogels on their microstructure...
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MDPI AG
2023-02-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/4/1691 |
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| author | Ying Kuang Puming Liu Yichen Yang Xiaosa Wang Menglong Liu Wei Wang Tianlin Guo Man Xiao Kai Chen Fatang Jiang Cao Li |
| author_facet | Ying Kuang Puming Liu Yichen Yang Xiaosa Wang Menglong Liu Wei Wang Tianlin Guo Man Xiao Kai Chen Fatang Jiang Cao Li |
| author_sort | Ying Kuang |
| collection | DOAJ |
| description | Natural polysaccharides with high viscosity, good thermal stability, and biocompatibility can improve the mechanical properties of inorganic silica aerogels and enhance their application safety. However, the effects of the preparation methods of polysaccharide-silica aerogels on their microstructure and application properties have not been systematically studied. To better investigate the effect of the microstructure on the properties of aerogel materials, two aerogels with different structures were prepared using Konjac glucomannan (KGM) and tetraethoxysilane (TEOS) via physical blending (KTB) and co-precursor methods (KTC), respectively. The structural differences between the KTB and KTC aerogels were characterized, and the thermal insulation and fire-retardant properties were further investigated. The compressive strength of the KTC aerogels with a cross-linked interpenetrating network (IPN) structure was three times higher than that of the KTB aerogels, while their thermal conductivity was 1/3 of that of the KTB aerogels. The maximum limiting oxygen index (<i>LOI</i>) of the KTC aerogels was 1.4 times, the low peak heat release rate (PHRR) was reduced by 61.45%, and the lowest total heat release (THR) was reduced by 41.35% compared with the KTB aerogels. The results showed that the KTC aerogels with the IPN have better mechanical properties, thermal insulation, and fire-retardant properties than the simple physically blending KTB aerogels. This may be due to the stronger hydrogen-bonding interactions between KGM and silica molecules in the KTC aerogels under the unique forcing effect of the IPN, thus enhancing their structural stability and achieving complementary properties. This work will provide new ideas for the microstructure design of aerogels and the research of new thermal insulation and fire-retardant aerogels. |
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| language | English |
| last_indexed | 2024-03-11T08:21:46Z |
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| series | Molecules |
| spelling | doaj.art-1362f3f134e943edb576675bb45eb1c62023-11-16T22:21:56ZengMDPI AGMolecules1420-30492023-02-01284169110.3390/molecules28041691Study on the Influence of the Preparation Method of Konjac Glucomannan-Silica Aerogels on the Microstructure, Thermal Insulation, and Flame-Retardant PropertiesYing Kuang0Puming Liu1Yichen Yang2Xiaosa Wang3Menglong Liu4Wei Wang5Tianlin Guo6Man Xiao7Kai Chen8Fatang Jiang9Cao Li10National “111” Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industry Microbiology, Glyn O. Phillips Hydrocolloid Research Center at HBUT, Hubei University of Technology, Wuhan 430068, ChinaNational “111” Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industry Microbiology, Glyn O. Phillips Hydrocolloid Research Center at HBUT, Hubei University of Technology, Wuhan 430068, ChinaNational “111” Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industry Microbiology, Glyn O. Phillips Hydrocolloid Research Center at HBUT, Hubei University of Technology, Wuhan 430068, ChinaNational “111” Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industry Microbiology, Glyn O. Phillips Hydrocolloid Research Center at HBUT, Hubei University of Technology, Wuhan 430068, ChinaNational “111” Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industry Microbiology, Glyn O. Phillips Hydrocolloid Research Center at HBUT, Hubei University of Technology, Wuhan 430068, ChinaNational “111” Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industry Microbiology, Glyn O. Phillips Hydrocolloid Research Center at HBUT, Hubei University of Technology, Wuhan 430068, ChinaNational “111” Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industry Microbiology, Glyn O. Phillips Hydrocolloid Research Center at HBUT, Hubei University of Technology, Wuhan 430068, ChinaNational “111” Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industry Microbiology, Glyn O. Phillips Hydrocolloid Research Center at HBUT, Hubei University of Technology, Wuhan 430068, ChinaNational “111” Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industry Microbiology, Glyn O. Phillips Hydrocolloid Research Center at HBUT, Hubei University of Technology, Wuhan 430068, ChinaNational “111” Center for Cellular Regulation and Molecular Pharmaceutics, Hubei Key Laboratory of Industry Microbiology, Glyn O. Phillips Hydrocolloid Research Center at HBUT, Hubei University of Technology, Wuhan 430068, ChinaSchool of Health Science and Engineering, Hubei University, Wuhan 430062, ChinaNatural polysaccharides with high viscosity, good thermal stability, and biocompatibility can improve the mechanical properties of inorganic silica aerogels and enhance their application safety. However, the effects of the preparation methods of polysaccharide-silica aerogels on their microstructure and application properties have not been systematically studied. To better investigate the effect of the microstructure on the properties of aerogel materials, two aerogels with different structures were prepared using Konjac glucomannan (KGM) and tetraethoxysilane (TEOS) via physical blending (KTB) and co-precursor methods (KTC), respectively. The structural differences between the KTB and KTC aerogels were characterized, and the thermal insulation and fire-retardant properties were further investigated. The compressive strength of the KTC aerogels with a cross-linked interpenetrating network (IPN) structure was three times higher than that of the KTB aerogels, while their thermal conductivity was 1/3 of that of the KTB aerogels. The maximum limiting oxygen index (<i>LOI</i>) of the KTC aerogels was 1.4 times, the low peak heat release rate (PHRR) was reduced by 61.45%, and the lowest total heat release (THR) was reduced by 41.35% compared with the KTB aerogels. The results showed that the KTC aerogels with the IPN have better mechanical properties, thermal insulation, and fire-retardant properties than the simple physically blending KTB aerogels. This may be due to the stronger hydrogen-bonding interactions between KGM and silica molecules in the KTC aerogels under the unique forcing effect of the IPN, thus enhancing their structural stability and achieving complementary properties. This work will provide new ideas for the microstructure design of aerogels and the research of new thermal insulation and fire-retardant aerogels.https://www.mdpi.com/1420-3049/28/4/1691Konjac glucomannansilica aerogelpreparation methodmicrostructurethermal insulation |
| spellingShingle | Ying Kuang Puming Liu Yichen Yang Xiaosa Wang Menglong Liu Wei Wang Tianlin Guo Man Xiao Kai Chen Fatang Jiang Cao Li Study on the Influence of the Preparation Method of Konjac Glucomannan-Silica Aerogels on the Microstructure, Thermal Insulation, and Flame-Retardant Properties Molecules Konjac glucomannan silica aerogel preparation method microstructure thermal insulation |
| title | Study on the Influence of the Preparation Method of Konjac Glucomannan-Silica Aerogels on the Microstructure, Thermal Insulation, and Flame-Retardant Properties |
| title_full | Study on the Influence of the Preparation Method of Konjac Glucomannan-Silica Aerogels on the Microstructure, Thermal Insulation, and Flame-Retardant Properties |
| title_fullStr | Study on the Influence of the Preparation Method of Konjac Glucomannan-Silica Aerogels on the Microstructure, Thermal Insulation, and Flame-Retardant Properties |
| title_full_unstemmed | Study on the Influence of the Preparation Method of Konjac Glucomannan-Silica Aerogels on the Microstructure, Thermal Insulation, and Flame-Retardant Properties |
| title_short | Study on the Influence of the Preparation Method of Konjac Glucomannan-Silica Aerogels on the Microstructure, Thermal Insulation, and Flame-Retardant Properties |
| title_sort | study on the influence of the preparation method of konjac glucomannan silica aerogels on the microstructure thermal insulation and flame retardant properties |
| topic | Konjac glucomannan silica aerogel preparation method microstructure thermal insulation |
| url | https://www.mdpi.com/1420-3049/28/4/1691 |
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