4,4'-二氨基二苯醚分子印迹聚合物/聚4,4'-二氨基二苯醚的电化学合成及其吸波性能研究

本文采用二次电聚合法,在石墨烯修饰铅笔芯电极(G-PEC)表面制备出4,4'-二氨基二苯醚分子印迹聚合物复合聚4,4'-二氨基二苯醚(4,4'-ODL-MIP/P-4,4'-ODL)新型电磁材料,考察了电极有效导电长度、石墨烯浓度、缓冲液pH、4,4'-二氨基二苯醚与功能单体丙烯酰胺的浓度及其浓度比、扫描电位范围、扫描圈数、扫描速率、洗脱时间等各种条件对复合材料荷电量的影响。矢量网络分析仪测试结果显示,所合成的复合材料在12.56GHz处出现-10.57dB的反射损耗,有效电磁波吸收率达到90%;而单一的4,4'-ODL-MIP和石墨烯反射损耗均高于-10dB,有效电磁波吸收率分别仅约为68%和60%,因而复合材料具备良好的吸波性。

Electrochemical Synthesis of 4,4'-Oxydianiline Molecular Imprinted Polymer/Poly 4,4'-Oxydianiline and Its Absorbing Properties

A novel electromagnetic material 4,4''-oxydianiline molecular imprinted polymer composite poly 4,4''-oxydianiline (4,4''-ODL-MIP/P-4,4''-ODL) was prepared on the surface of graphene modified pencil electrode (G-PEC) by means of the secondary electrochemical polymerization. The effects of the effective conductive length, the concentration of graphene, pH of buffer, the concentration ratio of 4,4''-oxydianiline to functional monomer acrylamide, the range of scanning potential, the number of scanning cycles, scanning rate and elution time on the charge of composite materials were investigated. The testing results of the vector network analyzers showed that as-synthesized composite material exhibited a reflection loss of -10.57dB at 12.56MHz, and the effective electromagnetic wave absorption rate reached 90%. However, the reflection loss of a single 4,4''-ODL-MIP and graphene were both higher than -10 dB, the effective electromagnetic wave absorption rates were only about 68% and 60%, respectively. Therefore, the composite material exhibited good wave absorbing properties.