摘要
针对苯并噁嗪(BZ)树脂的工艺特点,利用平板热压工艺制备了BZ/镀镍碳纤维(NPF),BZ/碳纤维(CF)、BZ/不锈钢纤维(SSF)三种树脂基复合材料试样,研究了该三种复合材料试样的力学性能,并着重考察了10 MHz^1.5 GHz频率范围内的电磁屏蔽性能与导电性能关系。结果表明,由于树脂对纤维浸润性不同,BZ/CF,BZ/NPF,BZ/SSF复合材料力学性能依次降低,BZ/CF复合材料拉伸强度达到81 MPa,弯曲强度达到112 MPa;同时BZ/CF,BZ/SSF,BZ/NPF复合材料导电性依次提高,随着导电性能的提高,电磁屏蔽性能大幅提升;BZ/NPF复合材料具有最佳的综合性能,其拉伸强度为73 MPa,弯曲强度为103 MPa,体积电阻率达到3.2×10^-3Ωcm,同时在10 MHz^1.5 GHz范围内电磁屏蔽效能均高于63 dB,最高达到79 dB。
According to the technological characteristics of benzoxazine(BZ)resin,three kinds of resin-based composite samples,BZ/nickel-plated carbon fiber(NPF),BZ/carbon fiber(CF)and BZ/stainless steel fiber(SSF),were prepared by hot pressing.The mechanical properties of these three composite samples were studied.The relationship between electromagnetic shielding performance in the frequency range of 10 MHz to 1.5 GHz and conductivity was emphatically investigated.The results show that the mechanical properties of BZ/CF,BZ/NPF,BZ/SSF composites decrease successively due to the different wettability of fibers,the tensile strength and bending strength of BZ/CF composite are 81 MPa and 112 MPa respectively.At the same time,the conductivity of BZ/CF,BZ/SSF,BZ/NPF increase successively,with the improvement of conductivity,the electromagnetic shielding property greatly improves.BZ/NPF composite has the best comprehensive properties,the tensile strength is 73 MPa,and the bending strength reaches 103 MPa,the volume resistivity is 3.2×10^–3Ω·cm,meanwhile,the electromagnetic shielding effectiveness is higher than 63 dB in the range of 10 MHz to 1.5 GHz,the highest value reaches 79 dB.
作者
王明
郑志才
肖亚超
孟祥武
王尚
陈艳
王强
Wang Ming;Zheng Zhicai;Xiao Yachao;Meng Xiangwu;Wang Shang;Chen Yan;Wang Qiang(Institute 53,China North Industries Group Corporation,Jinan 250031,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2019年第7期124-128,共5页
Engineering Plastics Application
关键词
苯并噁嗪
镀镍碳纤维
碳纤维
不锈钢纤维
力学性能
导电性
屏蔽效能
benzoxazine
nickel-plated carbon ber
carbon ber
stainless steel ber
mechanical property
conductivity
shielding property
