橡胶基体对橡胶/细菌纤维素晶须复合膜性能的影响

摘要

Bacterial cellulose whiskers (BCWs)were prepared by sulphuric acid hydrolysis method,and rubber/BCWs composite films were prepared by evaporation method,with styrene-butadiene rubber (SBR),natural rubber(NR) and carboxylated acrylonitrile-butadiene rubber(XNBR) as rubber matrixes respectively.The effects of rubber matrix on the water uptake capacity,water-stimuli mechanoresponsive and degradation property of the composite films were investigated.The results showed that the equilibrium swelling ratio of SBR/BCWs composite films was up to 72 ％,which substantially exceeded that of NR/BCWs and XNBR/BCWs composite films.Three kinds of composite films exhibited a striking water-stimuli mechano-responsive property,the SBR/BCWs composite films showed the best comprehensive performance and the NR/BCWs composite films possessed the best reusability.The addition of BCWs accelerated the degradation of rubber/BCWs composite films,and the SBR/BCWs composite films displayed the maximum mass loss rate.%采用硫酸水解法制备细菌纤维素晶须(BCWs),并分别以丁苯橡胶(SBR)、天然橡胶(NR)和羧基丁腈橡胶(XNBR)作为基体,用蒸发法制备了橡胶/BCWs复合膜,研究了橡胶基体对复合膜的水溶胀、水刺激-力响应及降解性能的影响.结果表明,SBR/BCWs复合膜的平衡溶胀率高达72％,远高于NR/BCWs和XNBR/BCWs复合膜.3种复合膜表现出强烈的水刺激-力响应性能,其中SBR/BCWs复合膜综合性能最佳,NR/BCWs复合膜的重复使用性较好.BCWs的加入促进了3种复合膜的降解,其中SBR/BCWs复合膜的质量损失率最大.