Study on interfacial adhesion of the aramid fibers/rubber matrix by grafting mercapto hyperbranched polysiloxane |
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| Affiliation: | 1. School of Chemical Engineering and Technology, Harbin Institute of Technology, PR China;2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150001, Heilongjiang, PR China;1. Laboratory of Materials Science, Tampere University of Technology, P.O. Box 589, 33101, Tampere, Finland;2. Institute for Materials and Processes, School of Engineering, The University of Edinburgh, The King''s Buildings, Robert Stevenson Road, EH9 3FB Edinburgh, UK;1. School of Food Engineering, Department of Chemistry, Harbin University, Harbin, 150086, China;2. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China;3. Integrated Composites Laboratory (ICL), Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA;4. Advanced Materials Division, Engineered Multifunctional Composites Nanotech. LLC., Knoxville, 37934, USA;5. Key Laboratory of Materials Processing and Mold, Zhengzhou University, Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450001 China;6. Department of Mechanical & Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India;1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, PR China;2. Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Ministry of Education, Beijing 100029, PR China;3. Beijing Engineering Research Center of Advanced Elastomers, Beijing 100029, PR China |
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| Abstract: | In order to improve the interfacial adhesion between aramid fiber (AF) and rubber matrix, the mercapto hyperbranched polysiloxane (HPSi) was grafted onto the AFs via a novel in-situ growth strategy, which combines the formation of polydopamine (PDA) precursor layer and the co-dehydration condensation between (3-aminopropyl) trimethoxysilane and (3-mercaptopropyl) trimethoxysilane. Based on the results of characterizations including morphology observations and chemical structure analyses, the growth process of mercapto HPSi with the reaction time was investigated and discussed. The pull-out force tests of AFs/rubber composites, which were carried out by universal testing machine, showed that the modification strategy proposed in this study could increase the interfacial adhesion up to approximately 96.5%, and the key factor could be inferred to be the covalent interaction between mercapto groups and double bonds. It is also worth mentioning that the phenomenon of excessive surface modification will occur with the overlong growth time, which would result in the reduction of the interfacial adhesion. |
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| Keywords: | Aramid fiber Mercapto groups Hyperbranched polysiloxane Interfacial adhesion |
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