摘要
采用机械共混法,以导电炭黑(CCB)、天然橡胶(NR)、环氧化天然橡胶(ENR)以及甲基丙烯酸甲酯接枝天然橡胶(MGNR)为原料,制备了复合材料NR/CCB、ENR/CCB、MGNR/CCB、NR/ENR/CCB、NR/MGNR/CCB。研究结果表明,CCB粒子网络在MGNR中比在ENR中的分散性好,三元共混改性可以进一步提高CCB网络的完整性。在5种复合材料中,NR/ENR/CCB复合材料的有效吸收频宽最宽(3.20 GHz),NR/MGNR/CCB的吸收性能最好(-42.8 d B)。与天然橡胶相比,环氧化改性具有拓宽复合材料有效吸收带宽的作用(拓频),甲基丙烯酸甲酯接枝改性可以增强吸波效能(增效)。结合电磁参数,讨论了复合材料可能的吸波机理。
Through conductive carbon black (CCB),using natural rubber (NR),epoxidized natural rubber(ENR) and methyl methacrylate grafted natural rubber (MGNR)as materials,composites of NR/CCB,ENR/CCB, MGNR/CCB,NR/ENR/CCB,NR/MGNR/CCB were prepared by mechanical mixing.The results show that the dispersion of CCB particles in the grafted modified matrix is better than that in the modified epoxy matrix.Among them,NR/ENR/CCB has the broadest effective bandwidth (3.20GHz)and NR/MGNR/CCB has the best microwave absorption capacity (-42.8dB).Moreover,epoxidation has a positive effect on broadening effective bandwidth,while grafting of methyl methacrylate can enhance microwave absorption capacity of the composites. Additionally,blending of modified natural rubber and natural rubber (NR/ENR/CCB and NR/MGNR/CCB)shows synergic effect on reinforcing the microwave absorbing performance.With the microwave parameters,the possible microwave attenuation was discussed.
作者
吕臻
王中奇
赵鹏飞
罗勇悦
Zhen Lu;Zhongqi Wang;Pengfei Zhao;Yongyue Luo(Chinese Agricultural Ministry Key Laboratory of Tropical Crop Product Processing,Chinese Academy of Tropical Agricultural Sciences,Zhanjiang 524001,China;College of Chemical Engineering and Environment,North University of China,Taiyuan 030051,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2018年第11期69-73,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51703242)
现代农业产业技术体系建设专项资金(CARS-33-JG2)
广东省自然科学基金资助项目(2016A030307004)
中国热带农业科学院院本级基本科研业务费专项(1630122018003
1630122018011)
关键词
天然橡胶
环氧化改性
接枝改性
电磁性能
natural rubber
epoxy modification
grafting modification
electromagnetic property
