Abstract: Using methyltriethoxysilane (MTES) as the silicon source, water as the solvent, cetyltrimethylammonium bromide (CTAB) as the surfactant, acetic acid and four different alkalis (urea, sodium hydroxide, ammonia water and tetramethylammonium hydroxide) as acid and base catalysts, sol-gel method and CO2 supercritical drying were used to prepare hydrophobic SiO2 aerogel. The effects of four different basic catalysts on the structure and properties of aerogels were comparatively studied. The results show that four different basic catalysts can prepare hydrophobic SiO2 aerogels with high transparency, high specific surface area, and flexibility, but different basic catalysts have different effects on the structure and properties of the prepared samples. The sample prepared with urea has the highest specific surface area (630 m2/g), transmittance (81.5%) and hydrophobic angle (162.3°), the lowest density, but poor mechanical properties;the maximum stress (0.171 MPa) and rebound rate (29.3%) of the sample prepared with sodium hydroxide are the highest;the sample prepared with tetramethylammonium hydroxide has the lowest thermal conductivity (19.9 mW·m-1·K-1), and its gel skeleton is formed by agglomeration of secondary particles with a diameter of about 10 nm, and this is significantly different from the pearl chain structure of the gel skeleton prepared by the other three base catalysts.
李祥文, 李昆锋, 武晨浩, 费志方, 张震, 孙文彩, 杨自春. 不同碱性催化剂对疏水SiO2气凝胶性能的影响[J]. 材料导报, 2025, 39(17): 24080159-5.
LI Xiangwen, LI Kunfeng, WU Chenhao, FEI Zhifang, ZHANG Zhen, SUN Wencai, YANG Zichun. Effects of Different Basic Catalysts on the Properties of Hydrophobic SiO2 Aerogels. Materials Reports, 2025, 39(17): 24080159-5.
1 Guo J Y, Zhao Y M, Zhang L J, et al. Materials Reports, 2019, 33(Z1), 202(in Chinese). 郭建业, 赵英民, 张丽娟, 等. 材料导报, 2019, 33(Z1), 202. 2 Ng S, Jelle B P, Sandberg L I C, et al. Construction and Building Materials, 2015, 77, 307. 3 Pan Y, He S, Gong L, et al. Materials and Design, 2017, 113, 246. 4 Li X, Yang Z, Li K, et al. Journal of Sol-Gel Science and Technology, 2019, 92(3), 652. 5 Talebi Z, Soltani P, Habibi N, et al. Construction and Building Materials, 2019, 220, 76. 6 Yang X, Wu Z, Chen H, et al. Frontiers in Materials, 2020, 7, 152. 7 Maleki H, Durães L, García-González C A, et al. Advances in Colloid and Interface Science, 2016, 236, 1. 8 Jiang X, Kong Y, Zhao Z, et al. RSC Advances, 2020, 10(43), 25911. 9 Chen Y X, Hendrix Y, Schollbach K, et al. Construction and Building Materials, 2020, 248, 118709. 10 Maleki H, Hüsing N. Applied Catalysis B:Environmental, 2018, 221, 530. 11 Amonette J E, Matyáš J. Microporous and Mesoporous Materials, 2017, 250, 100. 12 Ulker Z, Erkey C. Journal of Controlled Release, 2014, 177, 51. 13 Marszewski M, King S C, Galy T, et al. Journal of Colloid and Interface Science, 2022, 606, 884. 14 Marszewski M, King S C, Yan Y, et al. ACS Applied Nano Materials, 2019, 2(7), 4547. 15 Zhao L, Bhatia B, Yang S, et al. ACS Nano, 2019, 13(7), 7508. 16 Huang Y, He S, Feng M, et al. Journal of Non-Crystalline Solids, 2019, 521, 119507. 17 Haereid S, Einarsrud M A, Scherer G W. Journal of Sol-Gel Science and Technology, 1994, 3(3), 199. 18 Tamon H, Sone T, Okazaki M. Journal of Colloid and Interface Science, 1997, 188(1), 162. 19 Rao A V, Bhagat S D, Hirashima H, et al. Journal of Colloid and Interface Science, 2006, 300(1), 279. 20 Nadargi D Y, Rao A V. Journal of Alloys and Compounds, 2009, 467(1-2), 397. 21 Shao Z, He X, Cheng X, et al. Materials Letters, 2017, 204, 93. 22 Kanamori K, Aizawa M, Nakanishi K, et al. Advanced Materials, 2007, 19(12), 1589. 23 Hayase G, Kugimiya K, Ogawa M, et al. Journal of Materials Chemistry A, 2014, 2(18), 6525. 24 Wu X, Zhong K, Ding J, et al. Journal of Non-Crystalline Solids, 2020, 530, 119826. 25 Li X H, Yang Z C, Li K F, et al. Chemical Industry and Engineering Progress, 2020, 39(3), 1115(in Chinese). 李肖华, 杨自春, 李昆锋, 等. 化工进展, 2020, 39(3), 1115. 26 Cai L, Pu Q, Qu K, et al. CIESC Journal, 2016, 67(2), 648(in Chinese). 蔡龙, 浦群, 曲康, 等. 化工学报, 2016, 67(2), 648. 27 Su G H. Multi-scale heat transfer mechanism of composite nanoporous thermal insulation materials. Master's Thesis, Naval University of Engineering, China, 2015(in Chinese). 苏高辉. 复合纳米孔绝热材料多尺度传热机理. 硕士学位论文, 海军工程大学, 2015.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2025, Vol. 39 
