CNT基木塑复合材料的力学性能、电磁屏蔽性能

发布时间：2018-02-23 06:30

本文关键词： 丙烯酸酯碳纳米管木塑复合材料电磁屏蔽　出处：《工程塑料应用》2017年08期 　论文类型：期刊论文

【摘要】：采用碳纤维(CF)和碳纳米管(CNT)通过模压工艺制备出具有电磁屏蔽功能的丙烯酸酯木塑复合材料。借助材料试验机、动态热机械分析仪、微欧计和电磁屏蔽测量仪等详细研究CNT质量分数对丙烯酸酯木塑复合材料弯曲性能、动态力学性能、电阻率和电磁屏蔽效能的影响。结果表明,添加质量分数为2%的CNT,使得复合材料的弯曲强度和弯曲弹性模量分别增加了10%和16%。复合材料的储能模量也在CNT质量分数为2%时达到最大值,之后储能模量随着CNT的增加而逐渐下降,损耗因子在CNT质量分数多于2%时也逐渐增加。复合材料的吸水率和导电性能随着CNT含量的增加而增加。同时复合材料的电磁屏蔽效能也随着CNT含量增加而递增。在30~1 500 MHz范围内,电磁屏蔽效能从27 d B增加到40 d B。结果证明,当CNT质量分数在2%时,丙烯酸酯木塑复合材料具有较佳的力学性能和较好的电磁屏蔽效能(30 d B),能满足商业要求。
[Abstract]:Acrylates wood-plastic composites with electromagnetic shielding function were prepared by means of carbon fiber carbon fiber (CFC) and carbon nanotube (CNT) molding technology. The effects of mass fraction of CNT on flexural properties, dynamic mechanical properties, resistivity and electromagnetic shielding efficiency of acrylates wood-plastic composites were studied in detail. The flexural strength and flexural elastic modulus of the composites were increased by 10% and 16 when the mass fraction of CNT was 2%. The storage modulus of the composite reached the maximum when the mass fraction of CNT was 2. Then the storage modulus decreased with the increase of CNT. The loss factor increases gradually when the mass fraction of CNT is more than 2. The water absorption and conductivity of the composite increase with the increase of CNT content, and the electromagnetic shielding efficiency of the composite increases with the increase of CNT content. In the range of 30 / 1 500 MHz, The electromagnetic shielding efficiency was increased from 27 dB to 40 dB. The results show that when the mass fraction of CNT is 2, the acrylates wood-plastic composites have better mechanical properties and better electromagnetic shielding efficiency of 30 dB, which can meet the commercial requirements.
【作者单位】：福建农林大学材料工程学院;中国林业科学研究院木材工业研究所;
【基金】：中国博士后基金项目(2016T90150,2014M560138) 教育部留学回国人员科研启动基金项目(20141685)
【分类号】：TB332

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