摘要
为提高碳泡沫复合材料的力学性能和电磁屏蔽性能,以硼酚醛树脂为碳源,碳纳米管(CNTs)为增强相,空心微球为闭孔相,利用压塑成型-碳化工艺制备CNTs/碳泡沫复合材料,并在其表面包覆镍层。采用扫描电子显微镜、万能试验机、网络矢量仪等,研究了CNTs含量对碳泡沫复合材料的微观结构、压缩性能及电磁屏蔽性能的影响。结果表明:CNTs均匀分散在微球相表面;当其质量分数为0.8%时,碳泡沫复合材料的压缩性能最优(19 MPa),较改性前提高了850%;CNTs作为纳米增强相,其自身的拔出断裂效应改善了复合材料的压缩性能。CNTs的引入,增加了该复合材料对电磁波的吸收损耗,其电磁屏蔽性能显著提高。改性后,其电磁屏蔽效能最高可达54 dB,较改性前提高了83%。
In order to improve the mechanical properties and electromagnetic shielding properties of carbon foam composites,CNTs/carbon foam composites were prepared by compression molding and carbonization,with boron phenolic resin as carbon source,carbon nanotubes(CNTs)as reinforcement and hollow microspheres as closed cell phase,and then were coated with nickel layer.The effects of the content of CNTs on the microstructure,compressive properties and electromagnetic shielding properties of carbon foam composites,were investigated by scanning electron micro-scopy,universal testing machine and network vector instrument,respectively.Results showed that CNTs were evenly dispersed on the surface of microspheres.When its mass fraction was 0.8%,compressive strength of carbon foam composites showed the best(19 MPa),which was 850%higher than that before modification.CNTs,as nano-reinforcement,increased the compressive properties of carbon foam composites because of their own pull-out fracture effect.The introduction of CNTs increased the electromagnetic absorption loss of carbon foam composites,and thus improved its electromagnetic shielding performance significantly.The electromagnetic shielding efficiency of the modified carbon foam composites was up to 54 dB,which was 83%higher than that before modification.
作者
王恒
王斌
张婷
苏秉尧
于瑞
WANG Heng;WANG Bin;ZHANG Ting;SU Bingyao;YU Rui(School of Materials Science and Engineering,Xi’an Polytechnic University,Xi’an 710048,China;Xi’an Key Laboratory of Textile Composites,Xi’an Polytechnic University,Xi’an 710048,China)
出处
《纺织高校基础科学学报》
CAS
2023年第1期1-8,共8页
Basic Sciences Journal of Textile Universities
基金
陕西省科技厅重点研发计划项目(2020NY-154,2021NY-195)
陕西省教育厅重点科学研究计划协同创新中心项目(20JY027)
陕西省留学人员科技活动择优资助项目(2021014)。
关键词
碳泡沫
碳纳米管
硼酚醛树脂
力学性能
电磁屏蔽
carbon foam
carbon nanotubes
boron phenolic resin
mechanical properties
electromagnetic shielding
