共混比对导电炭黑/天然橡胶/环氧化天然橡胶复合材料电磁性能的影响  

Effect of Blend Ratio on the Electromagnetic Property of Conductive Carbon Black/Natural Rubber/Epoxidized Natural Rubber Composites

作　　者：李乐凡[1,2] 赵鹏飞[2] 吕臻[2] 许逵[2] 钟杰平[3] 李思东[3] 彭政[2] 汪志芬[1] 

机构地区：[1]海南大学材料与化工学院,海口570288 [2]中国热带农业科学院农产品加工研究所,湛江524001 [3]广东海洋大学理学院,湛江524088

出　　处：《材料导报》2016年第10期38-41,66,共5页Materials Reports

基　　金：海南省自然科学基金项目(20155197);中国热带农业科学院院本级基本科研业务费专项资金资助项目(1630062014021)

摘　　要：采用机械共混法制备了导电炭黑(CCB)填充天然橡胶(NR)/环氧化天然橡胶(ENR)复合材料,研究了NR/ENR共混比对复合材料微观形貌和电磁性能的影响。扫描电镜结果表明,相比于纯的NR和ENR,CCB在NR/ENR中能形成更优的填料网络结构。随着共混胶中NR含量的增大,复合材料的电磁性能先增强后减弱;当NR/ENR比例为70∶30时,复合材料导电率、介电损耗因子、C波段吸波性能达到最值,分别为0.34S/m,0.31和-23.15dB;共混比对复合材料力学性能影响不大,能够满足复合材料在相关领域的应用需求。Conductive carbon black（CCB）-filled natural rubber（NR）/epoxidized natural rubber（ENR）composites was prepared by mechanical mixing,and the effect of NR/ENR blend ratio on microstructure and electromagnetic property of the resulted composite was investigated.Compared with pure NR and ENR,CCB was selectively located in NR phase for NR/ENR binary rubber blend due to its better compatibility with NR matrix.With the increase of NR content in NR/ENR,the electromagnetic property of composite rose at first and subsequently declined slightly.When the NR∶ENR ratio is 70∶30,the electrical conductivity,dielectric loss and reflection loss of composite reaches the optimum values of 0.34S/m,0.31and-23.15 dB,respectively.Blend ratio shows an inconspicuous influence on the mechanical property of composite,which can endow the composites with some potential applications.

关 键 词：天然橡胶 环氧化天然橡胶 导电炭黑 共混比 电磁性能 

分 类 号：TB332[一般工业技术—材料科学与工程]