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空心石英纤维/酚醛树脂复合材料的结构与性能
吴文敬, 李寅, 王晓静, 韩宇, 刘岩
航天材料及工艺研究所, 北京 100076
摘要:
将石英纤维空心化,并通过模压成型方法制备了空心纤维/酚醛树脂复合材料。结果表明,空心纤维的空腔直径为4~7 μm,随着纤维空心度增大(0~0.5),纤维的力学强度提高。在相同的纤维体积分数下,当纤维空心度从0增大到0.5时,复合材料的密度和热导率分别从1.63 g/cm3和0.49 W/(m·K)降低到1.46 g/cm3和0.41 W/(m·K),烧蚀性能保持不变。采用此方法制备的空心纤维/酚醛复合材料同时具有良好的隔热、防热性能。
关键词:  空心纤维  酚醛树脂  复合材料  防隔热
DOI:10.12044/j.issn.1007-2330.2018.05.006
分类号:TB33
基金项目:
Structure and Properties of Hollow Quartz Fiber/Phenolic Composites
WU Wenjing, LI Yin, WANG Xiaojing, HAN Yu, LIU Yan
Aerospace Research Institute of Materials & Processing Technology, Beijing 100076
Abstract:
The quartz fiber was hollowed and the hollow fiber/phenolic resin composites were prepared by compression molding. The results show that the cavity diameter of hollow fiber is 4~7 μm. With increase of the fiber hollowness from 0 to 0.5, the mechanical strength of the fiber increases. Under the same fiber volume content, when the fiber hollowness increases from 0 to 0.5, the density and thermal conductivity of the composites decrease from 1.63 g/cm3 and 0.49 W/(m·K) to 1.46 g/cm3 and 0.41 W/(m·K), respectively, and the ablation resistance remains unchanged. The hollow fiber/phenolic composites prepared by this method behave good thermal insulation performance and ablative properties.
Key words:  Hollow fiber  Phenolic resin  Composites  Thermal insulation