Surface modification of silica nanoparticles by a polyoxyethylene sorbitan and silane coupling agent to prepare high-performance rubber composites |
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| Institution: | 1. Department of Rubber Technology and Polymer Science, Faculty of Science and Technology, Prince of Songkla University, Pattani 94000, Thailand;2. Department of Elastomer Technology and Engineering, Faculty of Engineering Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China;2. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China;3. Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, Beijing 100029, PR China;1. National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, Henan University, Kaifeng 475004, PR China;2. College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, PR China;3. Henan Wangwu Nano Technology Co., Ltd, Henan University, Jiyuan 459000, PR China;1. Department of Chemical & Bio-chemical Engineering, Dongguk University, 30 Pildong-ro 1gil, Jung-gu, Seoul 04620, Republic of Korea;2. Decontamination and Decommissioning Research Division, Korea Atomic Energy Research (KAERI), Daedeok-daero 989-111, Yuseong-gu, Daejeon 34057, Republic of Korea |
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| 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. |
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| Keywords: | TWEEN-20 Environment-friendly Silica/NR composites Volatile organic compounds (VOCs) |
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