原位成纤PTFE对PP/CNT微孔注塑发泡材料电磁屏蔽性能的影响  

In Situ Fiber-Forming PTFE on PP/CNT Microporous Injection Foam Effect on Electromagnetic Shielding Performance

作　　者：杜立强 贺建芸[1] 代海洋 申增强 曹俊伟 付俊杰[1] DU Liqiang;HE Jianyun;DAI Haiyang;SHEN Zengqiang;CAO Junwei;FU Junjie(Laboratory of Advanced Manufacturing Ying Lan of Polymer Materials,College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学,机电工程学院,高分子材料先进制造英蓝研究室,北京100029

出　　处：《塑料》2024年第1期28-31,共4页Plastics

摘　　要：采用聚丙烯(PP)为基体、以多壁碳纳米管(CNT)为碳纳米填料,制备二元复合泡孔材料PP/CNT,并且,当CNT含量为1%时,复合微孔材料泡孔质量及电磁屏蔽性能均较好。以聚四氟乙烯(PTFE)为原位成纤增强相,进行微孔注塑发泡成型,探究PP/CNT/PTFE三元复合微孔材料的电磁屏蔽性能,制备了力学性能较好、对电磁辐射吸收率较高的微发泡电磁屏蔽复合材料;研究了PTFE微纤含量对PP/CNT/PTFE三元复合微孔材料注塑发泡泡孔形貌及电磁屏蔽性能的影响规律;得到了该实验条件下PTFE的最佳添加量。结果表明,当PTFE含量为1%时,原位成纤效果较好,三元复合微孔材料的泡孔直径显著减小,电磁屏蔽性能从未添加PTFE时的12.6 dB提高至24.8 dB。The binary composite blister material PP/CNT was made by using polypropylene(PP)as the matrix and multi-walled carbon nanotubes(CNT)as the carbon nanofiller,and the blister quality and electromagnetic shielding performance of the composite microporous material were better with the addition of 1%CNT content.To explore the electromagnetic shielding performance of PP/CNT/PTFE ternary composite microporous materials by using polytetrafluoroethylene(PTFE)as the in situ fiber-forming reinforcing phase and microporous injection foam molding,and to prepare microfoam electromagnetic shielding composite with good mechanical properties and high absorption rate of electromagnetic radiation.The effect of PTFE microfiber content on the morphology and electromagnetic shielding performance of PP/CNT/PTFE ternary composite microporous material injection molded bubble pores was studied.The optimal amount of PTFE addition was obtained for this experimental condition.The experiments showed that the best in-situ fibrillation effect was achieved when the PTFE content was 1%,the bubble diameter of the ternary composite microporous material was significantly reduced,and the electromagnetic shielding performance was increased from 12.6 dB to 24.8 dB when PTFE was added to zero.

关 键 词：原位成纤 微孔发泡 电磁屏蔽 聚四氟乙烯 三元复合材料 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]