期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 101, 期 -, 页码 500-510出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2017.07.012
关键词
Hybrid; 3-Dimensional reinforcement; Mechanical properties; Thermal properties
资金
- National Natural Science Foundation of China [11572353, 51272056, 11121061, 91216301]
- foundation for Innovative Research Groups of the National Natural Science Foundation of China [11421091]
- National Science Fund for Distinguished Young Scholars of China [51525201]
A novel lightweight phenolic resin/silicone (PR-Si) hybrid aerogel composite was fabricated through vacuum impregnation using PR-Si hybrid aerogels as matrix and low density (0.184 g/cm(3)) carbon-bonded carbon fibre as 3-dimensional reinforcement. The PR-Si hybrid aerogels was synthesized through a facile sol-gel polymerization, accompanied by solvent exchange and ambient pressure drying from a mixture of PR and methyltrimethoxysilane (MTMS) with ethylene glycol as the porogen and hexamethylenetetramine as the catalyst. The hybrid aerogels possess hierarchically micro-meso-macroporous structure and higher thermal stability than that of the pristine PR aerogels. The obtained aerogel composites exhibit low density (0.312-0.356 g/cm(3)), high compressive strength (0.76-4.08 MPa), low thermal conductivity (0.098-0.240 W/(mK)), and good thermal ablative and insulative properties in oxyacetylene flame simulated high temperature environment (linear ablation rates as low as 0.073 mm/s and internal temperature peaks below 200 degrees C at 38mm in-depth position as the surface temperature approximately 1800 degrees C). (C) 2017 Elsevier Ltd. All rights reserved.
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