氧化石墨烯—橡胶的相互作用及其对橡胶性能的影响

发布时间：2018-01-23 19:23

  本文关键词： 氧化石墨烯 氧化程度 氢键作用 羧基丁腈橡胶 丁苯橡胶　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：氧化石墨烯(GO)因其独特性质和结构成为制备高性能橡胶的潜在填料,但其与非极性橡胶的相互作用差,影响补强效果。本文研究了羧基丁腈橡胶(xNBR)与GO间的相互作用,利用极性xNBR改性GO-丁苯橡胶(SBR)体系,提高GO的补强效果。结果表明::xNBR与GO之间存在氢键作用;xNBR改性后GO能在SBR基体中均匀分散,硫化胶交联程度明显提升。与空白胶相比,填充3 phr改性GO,硫化胶的拉伸强度提升了 359%;填充5phr时,硫化胶的定伸模量(M100、M300)以及撕裂强度分别提升了 149%、356%和310%,材料最大热分解速率温度(Tmax)提升了 17.49 ℃,导热系数提升了 33%,溶剂吸附常数(Qe)下降了 18%。而GO的氧化程度对于表面性质以及GO-橡胶的相互作用有较大影响,从而影响补强效果。不同氧化程度GO制备及性能研究表明:氧化剂用量增加,填料碳氧比下降,层间距增加,剥离程度增加,热稳定性下降,水溶液中ζ电位下降,稳定性增加。不同氧化程度GO对橡胶性能的补强研究表明:xNBR基体中,随GO氧化程度增加,填料-橡胶界面相互作用更强,分散更均匀。与空白胶相比,填充GOD3(制备氧化剂用量比为3),硫化胶交联密度最大,Qe下降8.8%;填充GOD 15(制备氧化剂用量比为15),硫化胶拉伸强度、撕裂强度、Mioo和M300达到最佳,分别提升115%、88%、111%和 269%;20 ℃/min 下,Tmax提升 8.41 ℃;导热系数提升了 33%。xNBR/SBR 共混基体中,填料氧化程度增加,接触角从98.56 °下降到69.33 °。与空白胶相比,填充GOD 3,硫化胶玻璃化温度提升了 3.11 ℃。填充GOD 9(制备氧化剂用量比为9),拉伸强度最佳,提升了 192%。填充GOD 15,硫化胶热稳定性最佳,Tmax提升29.42 ℃。
[Abstract]:Graphene oxide (GOO) is a potential filler for the preparation of high performance rubber due to its unique properties and structure, but its interaction with non-polar rubber is poor. The interaction between carboxyl acrylonitrile butadiene rubber (xNBR) and go was studied in this paper. The system of xNBR was modified by polar xNBR. The results showed that there was a hydrogen bond between the ratio of: 1: xNBR and go. Go modified by xNBR can disperse uniformly in SBR matrix, and the crosslinking degree of vulcanizate is improved obviously. Compared with blank rubber, the tensile strength of vulcanizate is increased by 359g when it is filled with 3 phr modified GO3. When filled with 5phr, the modulus of elongation and tear strength of the vulcanizate were increased by 149% and 310%, respectively. The maximum thermal decomposition rate (Tmax) of the material was increased by 17.49 鈩，

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