Synthesis and characterization of novel phenolic resin/silicone hybrid aerogel composites with enhanced thermal, mechanical and ablative properties 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Composites, Part A. Applied science and manufacturing
年/卷/期
2017 / 101A /
页码
500-510
ISSN号
1359-835X
作者单位
Aviat Ind Corp China, Harbin Aircraft Ind Grp Co Ltd, Harbin 150060, Heilongjiang, Peoples R China;Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150080, Heilongjiang, Peoples R China;Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150080, Heilongjiang, Peoples R China;Harbin Inst Technol, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150080, Heilongjiang, Peoples R China;
作者
Yin, Rongying;Cheng, Haiming;Hong, Changqing;Zhang, Xinghong;
摘要
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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关键词/主题词
Hybrid;3-Dimensional reinforcement;Mechanical properties;Thermal properties;
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