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碳纤维添加碳泡沫的电磁屏蔽效能及力学性能研究
罗霞, 俞科静, 钱坤
江南大学生态纺织教育部重点实验室, 无锡 214122
摘要:
为了制备高效轻质兼备优异的电磁屏蔽性能及力学性能的复合材料,本研究以酚醛树脂为基体,碳纤维为填料,经高温碳化制得了碳纤维添加酚醛树脂基碳泡沫。探究了碳纤维含量对复合材料的结构、电磁屏蔽效能及力学性能的影响。结果表明,碳纤维可以有效改善碳泡沫的泡孔结构,当碳纤维含量为3wt%时,泡沫基体的泡孔达到小且均匀的状态,平均泡孔直径为150 μm,同时碳纤维可以有效提高碳泡沫的电磁屏蔽效能,当碳纤维含量为3wt%时,复合材料的压缩强度和弯曲强度分别达到了4.41和3.85 MPa,比纯碳泡沫分别提高了60.3%和71.8%。当碳纤维含量为5wt%时,碳泡沫对频率为8~12 GHz的电磁波的平均屏蔽效能达到35 dB。
关键词:  碳泡沫  碳纤维  泡孔结构  电磁屏蔽效能  压缩性能  弯曲性能
DOI:10.12044/j.issn.1007-2330.2018.02.007
分类号:TQ127.11
基金项目:中央高校基本科研业务费专项资金资助(JUSRP51505);江苏省研究生培养创新工程(KYLX15_1182);江苏省产学研联合创新资金-前瞻性联合研究项目(BY2015019-33);连云港市产业前瞻与共性关键技术科技项目(CG1520);江苏省自然科学基金)-青年基金项目(BK20160157);江苏省产学研联合创新资金-前瞻性联合研究项目(BY2016022-07);江苏高校优势学科建设工程资助项目(PAPD)
Electromagnetic Interference Shielding and Mechanical Performances of Carbon Fiber Added Carbon Foam Composites
LUO Xia, YU Kejing, QIAN Kun
Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan university, Wuxi 214122
Abstract:
In order to prepare the composites with excellent electromagnetic shielding performance and mechanical properties, the carbon fiber modified phenolic carbon foam was prepared by high temperature carbonization with phenolic resin as matrix and carbon fiber as filler. The effects of carbon fiber content on the composite cell structure, electromagnetic shielding effectiveness and mechanical properties were investigated. The results show that the carbon fiber can improve the carbon foam cell structure effectively, when the content of carbon fiber is 3wt%, the phenolic foam matrix show smallest cell size and most uniform cells distribution, the average cell diameter is 150μm. Carbon fiber can effectively improve the carbon foam electromagnetic and mechanical properties.The compressive strength and flexural strength of the composites reach 4.41 and 3.85MPa, which has increased by 60.3% and 71.8%, respectively, compared with pure carbon foam.When the carbon fiber content is 5wt%, the average electromagnetic shielding effect of the carbon foam on the frequency of 8~12GHz is 35dB. When the carbon fiber content is 3wt%, the carbon foam composites show the best mchanical properties.
Key words:  Carbon foams  Carbon fiber cell structure  Electromagnetic shielding effectiveness  Compression property  Flexural property