Effect of silica particle size and coating by natural latex on properties of styrene‐butadiene rubber/carbon black/silica composites

IF 4.8 2区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES
Jiuming Liang, Zhu Luo, Jincheng Zhong, Hu Chen
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Abstract

Silica is a renewable resource that has become the primary filler for the rubber used in eco‐friendly tires. However, silica tends to agglomerate in the rubber matrix, particularly, micro‐ and nano‐scale silica, which limits its application. When ordinary‐particle‐size silica with low cost and high stacking density is modified using appropriate methods, high dispersion in rubber and good performance can be achieved with common processing equipment, which has significant engineering application value. In this study, silica particles with different sizes (nano‐scale, 19 and 45 μm) were treated with a 3‐mercaptopropyltriethoxysilane coupling agent (KH580). Subsequently, the silica with the ordinary particle size of 300 mesh (45 μm) was coated with natural latex (NL), and the mechanical properties of the modified silica‐filled styrene‐butadiene rubber (SBR)/carbon black (CB) compounds were investigated. The results revealed that the mechanical properties of the NL‐coated 45 μm silica‐filled composite improved significantly, particularly, in the area of tear strength and elongation at break, the composite properties were improved by 17.1% and 118.2%, respectively. Excellent performance over composites filled with coupling agent‐treated micron‐ and nanoscale silica. Enhancing the surface modification of silica through latex coating provides a means to improve the efficiency of industrial production and reduce costs.Highlights The low‐fine silica treated with KH580 has good dispersibility. Improved mechanical compatibility of NL‐coated silica with rubber. Improvement in strain performance of composites after NL coated with silica. The effect of silica dispersion on composite properties is greater than the effect of particle size. Industrial silica can be successfully addressed, paving the way for extensive utilization.

Abstract Image

白炭黑粒度和天然乳胶涂层对丁苯橡胶/炭黑/白炭黑复合材料性能的影响
白炭黑是一种可再生资源,已成为环保轮胎所用橡胶的主要填充物。然而,白炭黑容易在橡胶基质中结块,尤其是微米级和纳米级白炭黑,这限制了其应用。如果采用适当的方法对成本低、堆积密度高的普通粒度白炭黑进行改性,则可以利用普通加工设备在橡胶中实现高分散性和良好的性能,具有重要的工程应用价值。本研究用 3-巯丙基三乙氧基硅烷偶联剂(KH580)处理了不同尺寸(纳米级、19 和 45 μm)的白炭黑颗粒。随后,将普通粒度为 300 目(45 μm)的白炭黑涂覆在天然乳胶(NL)上,并研究了改性白炭黑填充丁苯橡胶(SBR)/炭黑(CB)化合物的机械性能。结果表明,NL 包覆的 45 μm 二氧化硅填充复合材料的机械性能显著提高,特别是在撕裂强度和断裂伸长率方面,复合材料的性能分别提高了 17.1% 和 118.2%。与用偶联剂处理过的微米级和纳米级二氧化硅填充的复合材料相比,性能优异。亮点 经 KH580 处理的低细白炭黑具有良好的分散性。NL 涂层白炭黑与橡胶的机械相容性得到改善。白炭黑涂覆 NL 后,复合材料的应变性能得到改善。白炭黑分散性对复合材料性能的影响大于粒度的影响。可成功解决工业白炭黑问题,为广泛利用白炭黑铺平道路。
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来源期刊
Polymer Composites
Polymer Composites 工程技术-材料科学:复合
CiteScore
7.50
自引率
32.70%
发文量
673
审稿时长
3.1 months
期刊介绍: Polymer Composites is the engineering and scientific journal serving the fields of reinforced plastics and polymer composites including research, production, processing, and applications. PC brings you the details of developments in this rapidly expanding area of technology long before they are commercial realities.
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