Wang Jingyi, Zhang Xumin, Wen Yanwei, Chen Yang, Fu Quansheng, Wang Jing, Jia Hongbing
School of New Materials and Shoes & Clothing Engineering, Liming Vocational University, Quanzhou 362000, China.
Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology, Nanjing 210094, China.
Nanomaterials (Basel). 2023 Jan 13;13(2):335. doi: 10.3390/nano13020335.
Aramid nanofibers (ANFs) were successfully produced by deprotonation of Kevlar fiber followed by grafting epichlorohydrin in dimethyl sulfoxide solution. The ANFs were then incorporated into carboxylated acrylonitrile butadiene rubber (XNBR) by means of latex blending, followed by vulcanization. The interaction between ANFs and XNBR, and the effects of ANFs on the mechanical strength, dielectric properties, and thermal stability of ANF/XNBR nanocomposites were investigated. The results revealed that hydrogen bonding and covalent bonding interactions existed between ANFs and the XNBR matrix and played a critical role in the reinforcement of ANFs to XNBR nanocomposites. After adding 5 phr (parts per hundred rubber) of ANFs, the XNBR nanocomposite exhibited a significant improvement in mechanical properties, namely a 182% increase in tensile strength and a 101% increase in tear strength. In addition, the dielectric constant and thermal properties of ANF/XNBR also increased dramatically. ANFs may thus make an ideal candidate for high-performance rubber materials.
通过对凯夫拉纤维进行去质子化，然后在二甲基亚砜溶液中接枝环氧氯丙烷，成功制备了芳纶纳米纤维（ANFs）。然后通过胶乳共混将ANFs掺入羧化丙烯腈丁二烯橡胶（XNBR）中，随后进行硫化。研究了ANFs与XNBR之间的相互作用，以及ANFs对ANF/XNBR纳米复合材料的机械强度、介电性能和热稳定性的影响。结果表明，ANFs与XNBR基体之间存在氢键和共价键相互作用，这对ANFs增强XNBR纳米复合材料起着关键作用。添加5份每百份橡胶（phr）的ANFs后，XNBR纳米复合材料的机械性能有显著提高，即拉伸强度提高了182%，撕裂强度提高了101%。此外，ANF/XNBR的介电常数和热性能也显著提高。因此，ANFs可能成为高性能橡胶材料的理想候选者。
