【摘要】 以纳米蒙脱土为增强剂与丁腈橡胶、吸水树脂(交联聚丙烯酸钠)等共混,制备了遇水膨胀橡胶。用扫描电镜观察了遇水膨胀橡胶的形貌,测试了力学和吸水膨胀性能。结果表明,添加纳米蒙脱土能显著提高遇水膨胀橡胶吸水前后的力学强度,改善橡胶中吸水树脂的分散性,降低其质量损失率。另外,研究了纳米蒙脱土含量对遇水膨胀橡胶吸水率的影响,对遇水膨胀橡胶在酸、碱、盐水和高温去离子水等不同介质溶液中的膨胀行为进行了探讨。更多还原

【Abstract】 A series of water-swellable rubbers(WSRs)were prepared by blending nitrile butadiene rubber(NBR),crosslinked sodium polyacrylate(CSP),and nano-montmorillonite(nano-OMMT)as reinforcing fillers.The morphologies of the synthesized WSRs were characterized by SEM,and their mechanical properties and water-swelling behaviors were determined.The results demonstrated that the addition of nano-OMMT can significantly increase the mechanical strength of WSR before and after water swelling,improve the dispersion of CSP particles in the NBR,and reduce the mass loss ratio of WSR.In addition,the effects of nano-OMMT content on water-swelling ratio by mass of WSR were investigated,and water-swelling behaviors of WSR in different swelling media(acid,alkaline,saline solution,and deionized water at higher temperature)were also studied.更多还原