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《合成橡胶工业》[ISSN:1000-1255/CN:62-1036/TQ]

期数:

2024年6期

页码:

508

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Effect of modified aramid nanofiber on compatibilization of natural rubber/epoxidized natural rubber composites

文章编号:

1000-1255（2024）06-0503-04

作者:

张可玉1; 2; 郑晓彤1; 徐铭韩1

1. 青岛科技大学 高分子科学与工程学院，山东 青岛266042； 2. 中德（扬州）输送工程技术有限公司，江苏 扬州 225009

Author(s):

ZHANG Ke-yu1; 2;  ZHENG Xiao-tong1;  XU Ming-han1?鄢

1. College of Polymer Science and Engineering, Qingdao University of Science and Technology , Qingdao 266042, China; 2. China (Yangzhou) Material Handling Tech-Engineering Ltd, Yangzhou 225009, China

关键词:

改性芳纶纳米纤维; 天然橡胶; 环氧化天然橡胶; 复合材料; 增容作用; 抗湿滑性能

Keywords:

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分类号:

-

DOI:

DOI:10.19908/j.cnki.ISSN1000-1255.2024.06.0508

文献标识码:

-

摘要:

天然橡胶（NR）与环氧化天然橡胶（ENR）复合可以提高NR的抗湿滑性能、力学性能、耐磨性能及耐热氧老化性能，而芳纶纳米纤维作为近年来新开发的一种高分子纳米填料，兼具宏观纤维和高分子纳米材料的性能优势。本工作先将环氧化天然胶乳与改性芳纶纳米纤维（t-ANF）复合制得ENR和t-ANF的预复合产物（ENR/t-ANF），再通过干法混炼将其与NR共混制备了NR/ENR/t-ANF复合材料，并进一步研究了ENR/t-ANF对NR性能的影响。结果表明，t-ANF的加入可以显著改善ENR在NR中的相分离现象，并且对白炭黑在NR中的分散具有促进作用；除此之外，ENR/t-ANF的加入改善了NR的抗湿滑性能。

Abstract:

The combination of natural rubber (NR) with epoxidized natural rubber (ENR) could improve the wet slid resistance, mechanical properties, abrasion resistance and thermo-oxidative aging resistance of NR, which showed important research significance. Aramid nanofiber, as a new nano filler for polymer developed in recent years, had the advantages of both macroscopic fibers and polymer nanomaterials. The NR/ENR composites were prepared by dry mixing with NR and the pre-composite prepared from ENR latex and the modified aramid nanofibers (t-ANF). The influences of ENR and t-ANF on the properties of NR were studied. The results showed that t-ANF improved significantly the phase separation of ENR in NR, and in the meanwhile enhanced effectively the dispersion of silica in the NR/ENR composites. Moreover, the addition of ENR/t-ANF improved the wet slid resistance of NR. This strategy provided theoretical and experimental basis for realizing the dispersion of silica in rubber matrix and improving the compatibility between ENR and NR.　SEM images of NR, different NR/ENRx and NR/ENRx/t-ANFy composites, where x represented the amount of ENR in NR/ENR and NR/ENR/t-ANF composites, and y represented the amount of t-ANF in NR/ENR/t-ANF composites, were shown in Fig 1. As shown in Fig 1b and 1c, silica dispersed uniformly with the addition of ENR to the system. However, when the amount of ENR in the NR/ENR composites was increased up to 15 phr （mass, similarly hereinafter）, agglomerations were presented due to the poor compatibility between NR and ENR. In comparison, the silica dispersion was more uniformly by loading t-ANF, and the best dispersion of the NR/ENR/t-ANF composites was achieved when the addition amount of the pre-composite ENR/t-ANF with m(ENR)/m(t-ANF) of 10/1.11 was 11.11 phr. The peak of loss factor (tan δ) became wider after the filling of ENR as shown in Fig 2. A new peak appeared at -28.9 ℃ when the amount of ENR was up to 15 phr, indicating that phase separation occured within the NR/ENR composites. In comparison, t-ANF prevented the phase separation of the NR/ENR composites. The intensity of the second tan δ peak of the composites decreased by the incorporation of t-ANF, revealing the improvement of the compatibility between ENR and NR. Meantime, t-ANF increased tan δ of NR/ENR composites at 0 ℃ which indicated the enhancement of the wet slid resistance. Correspondingly, the loading of a small amount of t-ANF (0.56 phr) would not increase the rolling resistance of the composites as the same tan δ of the composite at 60 ℃ was obtained.

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更新日期/Last Update: 1900-01-01