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利用电子束辐照法制备纳米石墨片(GnPs)-羧基丁腈橡胶(XNBR)复合材料,研究辐射剂量对胶乳共混体系稳定性的影响,并对GnPs-XNBR复合材料的交联度、热稳定性、电性能及其形貌予以表征。结果表明:辐照后GnPs-XNBR复合材料的交联度、热稳定性和体积电阻率提高,而共混乳液的稳定性显著降低。辐照强化了乳胶粒子与石墨片之间的界面结合,形成胶乳粒子包覆石墨片的核-壳结构,进而提高石墨片在基体中分散均匀性,并使GnPs-XNBR复合材料的热稳定性和介电常数提高,导电性和介电损耗降低。
The effects of radiation dose on the stability of latex blend system were investigated by electron beam irradiation (GNBPs) - carboxylated nitrile butadiene rubber (XNBR) composites. The effects of GnPs-XNBR composite crosslinking degree, Stability, electrical properties and morphology were characterized. The results showed that the crosslinkability, thermal stability and volume resistivity of GnPs-XNBR composite increased after irradiation, but the stability of blend emulsion decreased significantly. Irradiation enhanced the interfacial bonding between the latex particles and the graphite sheet to form a core-shell structure of the latex-coated graphite sheet, thereby improving the dispersion uniformity of the graphite sheet in the matrix and the thermal stability of the GnPs-XNBR composite And the dielectric constant increases, the conductivity and dielectric loss decreases.