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Mechanical, thermal properties and curing kinetics of liquid silicone rubber filled with cellulose nanocrystal

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Abstract

To prepare liquid silicone rubber (LSR)/cellulose nanocrystal (CNC) nanocomposite, 3-aminopropyltriethoxysilane (APTES) was used to modify the surface of CNC to improve the interfacial interaction between the hydrophilic CNC and the hydrophobic LSR. Fourier transform infrared spectroscopy and energy dispersive spectrometer results demonstrated that APTES modified CNC successfully. It was found that small amount of modified CNC (M-CNC) had better reinforcement than SiO2 in LSR nanocomposites, the tensile strength and the strain at break of LSR increased over 85% and 44% by adding 1.5 wt% M-CNC. However, DSC and rheology tests indicated that APTES modified CNC increased the curing temperature of LSR and limited the addition of CNC, which was attributed to poisoning of Pt catalyst by APTES. Furthermore, small amount of M-CNC improved the thermal stability of LSR, the TGA results showed that the 10% weight loss temperature (T10%) of LSR increased 56 °C with 1.0 wt% addition of M-CNC.

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Acknowledgments

This work was financially supported by the Special Fund for Forest Scientific Research in the Public Welfare (201504603), the Program for key Science and Technology Team of Zhejiang Province (2013TD17), the Project of National Natural Science Foundation of China (21404092), Science and technology innovation program for college students of Zhejiang Province (2016R412040), the Project of National Natural Science Foundation of China (51603189) and Zhejiang Provincial Natural Science Foundation of China (No. LQ14C160004).

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Authors and Affiliations

  1. School of Engineering, Zhejiang A&F University, Hangzhou, 311300, China

    Xiuwen Li, Qiang Wu, Minghuan Zheng, Qian Li & Siqun Wang

  2. National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, Hangzhou, 311300, China

    Xiuwen Li, Qiang Wu, Minghuan Zheng, Qian Li & Siqun Wang

  3. Center for Renewable Carbon, University of Tennessee, Knoxville, TN, 37996, USA

    Siqun Wang

  4. Zhejiang Liniz Fine Chemical Co. Ltd, Lin’an, 311305, China

    Chunhui Zhang

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  1. Xiuwen Li
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  2. Qiang Wu
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  3. Minghuan Zheng
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  4. Qian Li
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  5. Siqun Wang
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Correspondence to Qiang Wu or Qian Li.

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Li, X., Wu, Q., Zheng, M. et al. Mechanical, thermal properties and curing kinetics of liquid silicone rubber filled with cellulose nanocrystal. Cellulose 25, 473–483 (2018). https://doi.org/10.1007/s10570-017-1581-6

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