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Preparation of a novel flame retardant based on diatomite/polyethyleneimine modified MWCNT for applications in silicone rubber composites

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Abstract

A new flame retardant, DM/PEI/MWCNT, was prepared by self-assembly method based on non-covalent interactions between hydroxyl and amino groups on the surface of hydroxyl multi-walled carbon nanotubes (MWCNT), polyethyleneimine (PEI) and diatomite (DM). The flame-retardant composites were prepared by adding DM/PEI/MWCNT to room-temperature vulcanisated silicone rubber (RTV-silicone). The structure of the flame retardant and composites was characterised by polarising light microscope, scanning electron microscopy and Fourier-transform infrared spectroscopy. The flame retardancy of composites was studied by limited oxygen index and cone calorimeter measurement. Results showed that RTV-silicone composites with DM/PEI/MWCNT owned better flame retardancy. In addition, DM/PEI/MWCNT exhibited better compatibility in silicone rubber than that of unmodified DM, and the tensile properties of RTV-silicone/DM/PEI/MWCNT composites were improved compared to pure RTV-silicone.

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Acknowledgements

This work was supported by “National Natural Science Funds (No. 51873103)”, “Capacity Building Project of Some Local Colleges and Universities in Shanghai (No.17030501200)”, “Scientific and Technological Support Projects in the Field of Biomedicine (No. 19441901700)”, “Talent Program of Shanghai University of Engineering Science (No. 2017RC422017)”, and “First-rate Discipline Construction of Applied Chemistry (No. 2018xk-B-06)”.

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  1. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620, People’s Republic of China

    Lu Yao, Wang Jincheng & Zhang Chenyang

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  1. Lu Yao
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  2. Wang Jincheng
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  3. Zhang Chenyang
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Correspondence to Wang Jincheng.

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Yao, L., Jincheng, W. & Chenyang, Z. Preparation of a novel flame retardant based on diatomite/polyethyleneimine modified MWCNT for applications in silicone rubber composites. J Rubber Res 24, 137–146 (2021). https://doi.org/10.1007/s42464-020-00079-z

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