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Surface modification of silica nanoparticles by a polyoxyethylene sorbitan and silane coupling agent to prepare high-performance rubber composites
Polymer Testing ( IF 5.0 ) Pub Date : 2020-01-01 , DOI: 10.1016/j.polymertesting.2019.106195
Yake Xiao , Hua Zou , Liqun Zhang , Xin Ye , Dongli Han

Abstract The interfacial interaction between nano-silica and rubber matrix is very important for the preparation of high-performance rubber composites. In this paper, we first proposed the use of TWEEN-20 as a new silica modifier, it has four long arms consisting of three polyether chains with terminal hydroxyl group and a fatty chain. The oxygen on the polyether can form a hydrogen bond with the silanol groups on silica surface, and the terminal hydroxyl groups can chemically react with the silanol groups without any VOCs. Moreover, the long fatty chain can weaken silica polarity to obtain a better compatibility with rubber, so that silica modified by TWEEN-20 with chemical reaction and physical absorption can homogeneously disperses in rubber matrix. Nextly, we prepared high-performance natural rubber (NR) composites by adjusting the ratio of TWEEN-20 to TESPT to adjust the physical and chemical interaction between nano-silica and rubber molecular chains. The results indicated that the performances, including the filler dispersion, static mechanical properties, and dynamic heating (viscoelastic self-heating), were optimal when the ratio of TESPT to TWEEN-20 was 2:1. In addition, one-third of TESPT was replaced by TWEEN-20 to prepare silica/rubber composites, which can reduce one-third of VOCs, improve “scorchy”, and achieve high dispersion of silica.

中文翻译:

聚氧乙烯脱水山梨糖醇和硅烷偶联剂表面改性二氧化硅纳米粒子制备高性能橡胶复合材料

摘要 纳米二氧化硅与橡胶基体之间的界面相互作用对于制备高性能橡胶复合材料非常重要。在本文中,我们首先提出使用 TWEEN-20 作为新型二氧化硅改性剂,它具有四个长臂,由三个带末端羟基的聚醚链和一个脂肪链组成。聚醚上的氧可以与二氧化硅表面的硅烷醇基团形成氢键,末端羟基可以与硅烷醇基团发生化学反应,不会产生任何VOCs。此外,长脂肪链可以减弱白炭黑的极性,从而获得更好的与橡胶的相容性,使TWEEN-20改性白炭黑通过化学反应和物理吸附能均匀地分散在橡胶基体中。接下来,我们通过调节 TWEEN-20 与 TESPT 的比例来调节纳米二氧化硅与橡胶分子链之间的物理和化学相互作用,制备了高性能天然橡胶 (NR) 复合材料。结果表明,当TESPT与TWEEN-20的比例为2:1时,填料分散性、静态力学性能和动态加热(粘弹性自热)性能最佳。此外,将三分之一的TESPT换成TWEEN-20制备白炭黑/橡胶复合材料,可减少三分之一的VOCs,改善“焦化”,实现白炭黑的高分散。当 TESPT 与 TWEEN-20 的比例为 2:1 时,动态加热(粘弹性自加热)是最佳的。此外,将三分之一的TESPT换成TWEEN-20制备白炭黑/橡胶复合材料,可减少三分之一的VOCs,改善“焦化”,实现白炭黑的高分散。当 TESPT 与 TWEEN-20 的比例为 2:1 时,动态加热(粘弹性自加热)是最佳的。此外,将三分之一的TESPT换成TWEEN-20制备白炭黑/橡胶复合材料,可减少三分之一的VOCs,改善“焦化”,实现白炭黑的高分散。
更新日期:2020-01-01
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