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用于隔热的柔性酚醛硅氧烷杂化气凝胶的制备与性能

Preparation and Properties of Flexible Phenolic Silicone Hybrid Aerogels for Thermal Insulation.

作者信息

Ye Danni, Lv Hongli, Zheng Zhenrong, Luo Lijuan

机构信息

School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China.

SWOTO (Beijing) Protection Technology Co., Ltd., Beijing 100041, China.

出版信息

Molecules. 2024 Oct 18;29(20):4942. doi: 10.3390/molecules29204942.

DOI:10.3390/molecules29204942
PMID:39459310
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11510451/
Abstract

In order to prepare flexible thermal protection aerogel materials, using dimethyldimethoxysilane (DMDMS) and methyltrimethoxysilane (MTMS) as co-precursors, isocyanate-propyltrimethoxysilane (CFS-006) was added to the co-precursor as a coupling agent, and resorcinol and formaldehyde were added to the sol solution to prepare a phenolic silicone hybrid aerogel (FAS) by the sol-gel method. The prepared FAS aerogel had no phase separation problem, the density was only 0.118 g/cm, the hydrophobic angle reached 155.3°, and it had certain flexibility. It could be compressed to 70% and still be restored to its original state. The FAS aerogel also had a low thermal conductivity of 0.0318 W/(m·K) and good high temperature insulation. The introduction of phenolic groups improved thermal stability; Tmax increased to 643.7 °C, and the residual carbon rate was 24.5%. This work has positive significance for the future combination of aerogels and textiles in the preparation of firefighting protective clothing.

摘要

为制备柔性热防护气凝胶材料，以二甲基二甲氧基硅烷（DMDMS）和甲基三甲氧基硅烷（MTMS）作为共前驱体，将异氰酸酯丙基三甲氧基硅烷（CFS - 006）作为偶联剂添加到共前驱体中，并向溶胶溶液中加入间苯二酚和甲醛，通过溶胶 - 凝胶法制备了酚醛 - 硅氧烷杂化气凝胶（FAS）。制备的FAS气凝胶不存在相分离问题，密度仅为0.118 g/cm，疏水角达到155.3°，且具有一定的柔韧性，可压缩至70%并仍恢复至原始状态。FAS气凝胶还具有0.0318 W/(m·K)的低热导率和良好的高温隔热性能。酚羟基的引入提高了热稳定性；Tmax提高到643.7 °C，残碳率为24.5%。这项工作对于未来气凝胶与纺织品结合制备消防防护服具有积极意义。

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