Optimization of Polyamide Pulp-Reinforced Silica Aerogel Composites for Thermal Protection Systems.

ABSTRACT: The present work describes for the first time the preparation of silica-based aerogel composites containing tetraethoxysilane (TEOS) and vinyltrimethoxysilane (VTMS) reinforced with Kevlar® pulp. The developed system was extensively investigated, regarding its physical, morphological, thermal and mechanical features. The obtained bulk density values were satisfactory, down to 208 kg·m-3, and very good thermal properties were achieved-namely a thermal conductivity as low as 26 mW·m-1·K-1 (Hot Disk®) and thermal stability up to 550 °C. The introduction of VTMS offers a better dispersion of the polyamide fibers, as well as a higher hydrophobicity and thermal stability of the composites. The aerogels were also able to withstand five compression-decompression cycles without significant change o

SUBMITTER: Ghica ME 

PROVIDER: S-EPMC7361946 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature