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Aramid nanofiber reinforced nitrile rubber assisted by cellulose nanocrystals
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-02-03 , DOI: 10.1002/app.50546
Zonglei Guo 1 , Dashuang Guo 1 , Fujun Liu 1 , Hui Wang 1, 2, 3 , Jianhui Song 1
Affiliation  

A fiber‐reinforced rubber composite was prepared by mixing aramid nanofibers (ANF) suspension and nitrile rubber (NBR) latex. The effects of ANF content and corresponding surface modification on the microstructure, vulcanization performance, processing and mechanical properties of composite materials, were systematically investigated. We found that, compared with commonly used short‐cut aramid fibers, ANF fillers tend to form a stronger filling network within NBR matrix, resulting in a pronounced Payne effect. By improving the interfacial adhesion via dopamine (DA) coating onto ANF surface, the tensile strength can be further enhanced as expected. Besides, to eliminate the detriment of mechanical performance due to residual sodium polyacrylate in the course of flocculation, cellulose nanocrystal (CNC) was adopted to serve as a thickener during solution mixing. The incorporation of CNC can significantly improve the mechanical properties, which identifies a synergistic reinforcement effect arising from the cooperation of two types of fillers.

中文翻译:

纤维素纳米晶体辅助的芳纶纳米纤维增强丁腈橡胶

通过混合芳族聚酰胺纳米纤维(ANF)悬浮液和丁腈橡胶(NBR)乳胶来制备纤维增强的橡胶复合材料。系统地研究了ANF含量和相应的表面改性对复合材料的微观结构,硫化性能,加工性能和力学性能的影响。我们发现,与常用的短切芳纶纤维相比,ANF填料趋向于在NBR基体中形成更牢固的填充网络,从而产生明显的Payne效应。通过改善在ANF表面上通过多巴胺(DA)涂层的界面附着力,可以进一步提高拉伸强度。此外,为了消除絮凝过程中残留的聚丙烯酸钠对机械性能的损害,纤维素纳米晶体(CNC)被用作溶液混合过程中的增稠剂。加入CNC可以显着改善机械性能,这可以确定两种填料的协同作用产生的协同增强作用。
更新日期:2021-03-07
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