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Preparation and Properties of Sepiolite-Based 3D Flame-Retardant Aerogel

Published online by Cambridge University Press:  01 January 2024

Yelei Hu ,
Tong Xu ,
Hong Xu ,
Yi Zhong ,
Linping Zhang ,
Bijia Wang ,
Xiaofeng Sui ,
Xueling Feng  and
Zhiping Mao
Yelei Hu
Affiliation:
Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
Tong Xu
Affiliation:
Shanghai Technical Institute of Electronics & Information, Sino-German Engineering College, No. 3098, Wahong Highway, Fengxian District, Shanghai, China
Hong Xu
Affiliation:
Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China Shanghai Belt and Road Joint Laboratory of Textile Intelligent Manufacturing, Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China National Innovation Center of Advanced Dyeing & Finishing Technology, Shandong Zhongkang Guochuang Research Institute of Advanced Dyeing & Finishing Technology Co. Ltd, Taian City 271000, Shandong Province, China
Yi Zhong
Affiliation:
Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China Shanghai Belt and Road Joint Laboratory of Textile Intelligent Manufacturing, Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China National Innovation Center of Advanced Dyeing & Finishing Technology, Shandong Zhongkang Guochuang Research Institute of Advanced Dyeing & Finishing Technology Co. Ltd, Taian City 271000, Shandong Province, China
Linping Zhang
Affiliation:
Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China Shanghai Belt and Road Joint Laboratory of Textile Intelligent Manufacturing, Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China National Innovation Center of Advanced Dyeing & Finishing Technology, Shandong Zhongkang Guochuang Research Institute of Advanced Dyeing & Finishing Technology Co. Ltd, Taian City 271000, Shandong Province, China
Bijia Wang
Affiliation:
Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China Shanghai Belt and Road Joint Laboratory of Textile Intelligent Manufacturing, Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China National Innovation Center of Advanced Dyeing & Finishing Technology, Shandong Zhongkang Guochuang Research Institute of Advanced Dyeing & Finishing Technology Co. Ltd, Taian City 271000, Shandong Province, China
Xiaofeng Sui
Affiliation:
Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China Shanghai Belt and Road Joint Laboratory of Textile Intelligent Manufacturing, Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China National Innovation Center of Advanced Dyeing & Finishing Technology, Shandong Zhongkang Guochuang Research Institute of Advanced Dyeing & Finishing Technology Co. Ltd, Taian City 271000, Shandong Province, China
Xueling Feng
Affiliation:
Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China Shanghai Belt and Road Joint Laboratory of Textile Intelligent Manufacturing, Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China National Innovation Center of Advanced Dyeing & Finishing Technology, Shandong Zhongkang Guochuang Research Institute of Advanced Dyeing & Finishing Technology Co. Ltd, Taian City 271000, Shandong Province, China
Zhiping Mao*
Affiliation:
Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China Shanghai Belt and Road Joint Laboratory of Textile Intelligent Manufacturing, Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China National Innovation Center of Advanced Dyeing & Finishing Technology, Shandong Zhongkang Guochuang Research Institute of Advanced Dyeing & Finishing Technology Co. Ltd, Taian City 271000, Shandong Province, China
*
e-mail: zhpmao@dhu.edu.cn
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Abstract

Sepiolite-based composites have great potential for application as flame-retardant and thermal-insulation material but their application and development are limited by poor mechanical properties. The objective of the present study was to combine polyvinyl alcohol (PVA) and 3-aminopropyltriethoxysilane (KH-550) with sepiolite (Sep) to improve its aerogel strength. A universal testing machine, thermogravimetry, and microcalorimetry were used to investigate the mechanical properties, thermal-stability, and flame-retardant properties, respectively, of aerogels. The results indicated that KH-550 can enhance effectively the mechanical properties and flame retardancy of aerogels. The compressive modulus of PVA/Sep vs KH-550/PVA/Sep aerogel was 209.28 vs. 474.43 kPa, the LOI index changed from 26.4 to 30.4%. The porosity of the aerogels was > 96% and the density was < 0.05 g/cm3. The thermal conductivity remained at between 0.0340 and 0.0390 W/(m·K), and the aerogel could recover to > 85% after a 50% compressive deformation. These data indicated that Sep-based aerogel would act as a flame retardant and a thermal insulating material with excellent mechanical properties.

Keywords

Compressive modulusFlame retardancyFreeze-dryingMechanical propertyPVA/Sep aerogel
Type
Original Paper
Information
Clays and Clay Minerals , Volume 70 , Issue 6 , December 2022 , pp. 865 - 881
Copyright
Copyright © The Author(s), under exclusive licence to The Clay Minerals Society 2023

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