文献类型：期刊文献

中文题名：酚醛浸渍碳烧蚀体(PICA)的制备、结构及性能

英文题名：Preparation and Properties of Phenolic Impregnated Carbon Ablator

作者：贾献峰[1];刘旭华[1];乔文明[1];凌立成[1];龙东辉[1]

机构：[1]华东理工大学,化学工程联合国家重点实验室,上海200237

年份：2016

卷号：46

期号：1

起止页码：77

中文期刊名：宇航材料工艺

外文期刊名：Aerospace Materials & Technology

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

语种：中文

中文关键词：热防护材料;酚醛浸渍碳烧蚀体;低密度;溶胶-凝胶

外文关键词：Thermal protection material;Phenolic impregnated carbon ablator;Low density;Sol-gel reaction

摘要：采用热塑性酚醛树脂溶液浸渍碳毡,经过溶胶-凝胶反应和常压干燥后,制备出一系列不同密度的酚醛浸渍烧蚀体(PICA)(0.27-0.47 g/cm^3)材料,并系统研究了不同密度的PICA碳化前后微观形貌、力学性能及隔热性能的变化规律。结果表明:PICA具有典型的碳纤维增强酚醛气凝胶复合结构。不同密度的PICA均具有优异的力学性能和隔热性能,且弯曲强度为2.2-16.5 MPa,热导率为56-62 m W/(m·K)。在密度为0.40 g/cm^3时,PICA弯曲强度最大,热导率最低。进一步通过1000℃高温处理之后,相应的C-PICA材料仍然表现出轻质、高强、低热导率的特征。
In this work,we reported an effective method to prepare phenolic impregnated carbon ablator(PICA)by a sol-gel impregnation of phenolic solution into carbon fiber mat,followed by ambient drying.The density of the PICA could be adjusted in a wide range(0.27 to 0.47 g/cm^3)by using different concentrations of phenolic solution.The microstructure,flexural property and thermal insulation property of PICA were systematically investigated.PICA,which are composed of phenolic aerogel reinforced by carbon fiber,exhibit excellent mechanical property(2.2to 16.5 MPa)and insulation performance[56 to 62 m W/(m·K)].The highest bending strengthen of 16.5 MPa and lowest thermal conductivity of 56 m W/(m·K)can be achieved at a mediate density of 0.40 g/cm^3.After carbonization at high temperature(1000℃),the resulting carbonized C-PICA still exhibit low density,high flexural strengthen and low thermal conductivity.