【2018-0325】还原氧化石墨烯/SBA-PMMA复合材料的制备及介电性能

《复合材料学报》优先在线发表论文。

摘 要：采用乳液聚合法制备苯乙烯-丙烯酸丁酯共聚物(SBA),通过熔融共混法制备了还原氧化石墨烯/苯乙烯-丙烯酸丁酯共聚物-聚甲基丙烯酸甲酯(rGO/SBA-PMMA)复合材料，采用FTIR、TGA、动态力学分析对复合材料进行了结构表征，并对其进行了介电性能测试。结果显示， rGO的加入能够提高SBA的玻璃化转变温度。同时,也可以提高rGO/SBA复合材料的热稳定性。rGO的加入显著提升了rGO/SBA复合材料的介电常数。在rGO/SBA复合材料中，其渗流阈值在1.17wt%~2wt%之间，当rGO含量为1.17wt%时，其复合材料具有高介电的特性。在rGO/SBA-PMMA复合材料中,当SBA含量为13wt%及rGO含量为0.52wt%时，在频率为1000 Hz处其介电常数可达到8.79，且介电损耗低至0.37，进一步表明了rGO/SBA-PMMA复合材料具有高介电低损耗的特性。

关键词：还原氧化石墨烯；苯乙烯-丙烯酸丁酯共聚物；复合材料；介电常数；介电损耗

Abstract: Styrene butyl acrylate copolymer (SBA) was prepared by emulsion polymerization. The reduced graphene oxide/styrene butyl acrylate copolymer-polymethyl methacrylate (rGO/SBA-PMMA) composites were fabricated through melt blending method. The structure of the composite was characterized by FTIR, TGA and dynamic mechanical analysis, and the dielectric properties of the composites were tested. The results show that the addition of rGO can increase the glass transition temperature of SBA. At the same time, it can enhance the thermal stability of rGO/SBA composites. Moreover, the addition of rGO significantly increases the dielectric constant of the rGO/SBA composites. In rGO/SBA composites, the composite possesses the property of high dielectric. For rGO/SBA-PMMA composites, when the SBA content is 13wt% and the rGO content is 0.52wt%, the dielectric constant can approach to 8.79 and the dielectric loss is as low as 0.37 at 1000 Hz, which further shows the rGO/SBA-PMMA composites with characteristics of high dielectric constant and low dielectric loss.

Keywords: reduced graphene oxide; styrene-butyl acrylate copolymer; composites; dielectric constant; dielectric loss

作者：江学良等，湖北省等离子体化学与新材料重点实验室，武汉工程大学材料科学与工程学院，武汉

通讯作者：游峰，湖北省等离子体化学与新材料重点实验室，武汉工程大学材料科学与工程学院，武汉

全文详见中国知网学术期刊优先数字出版。