The SiO2 nanoparticles were coated on the surface of graphene oxide (GO) by sol-gel method to get the SiO2-G compound. The SiO2-G was restored and oleophylically modified to prepare hydrophobic modified SiO2-G (HM-SiO2-G) which was subsequently added to silicone rubber matrix to prepare two-component room temperature vulcanized (RTV-2) thermal conductive silicone rubber. The morphology, chemical structure and dispersity of the modified graphene were characterized with SEM, FTIR, Raman, and XPS methods. In addition, the heat-resistance behavior, mechanical properties, thermal conductivity, and electrical conductivity of the RTV-2 silicone rubber were also studied systematically. The results showed that the SiO2 nanoparticles were coated on graphene oxide successfully, and HM-SiO2-G was uniformly dispersed in RTV-2 silicone rubber. The addition of HM-SiO2-G could effectively improve the thermal stability, mechanical properties and thermal conductivity of RTV-2 silicone rubber and had no great influence on the electrical insulation performance.
Graphene Modification Two components Room temperature vulcanized silicone rubber Thermal conductivity
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The authors would like to thank the Guangdong Province Science and Technology projects (Grant No. 2017A040402005) and Guangdong Bureau of Quality and Technical Supervision Science and Technology projects (Grant No. 2017CT30) for financial support of this work.
Zheng, Z. M.; Xu, C. H.; Jiang, J.; Ren, C. Y.; Gao, W.; Xie, Z. M. Hydrophobicity of contaminated silicone rubber surfaces. Chinese J. Polym. Sci.2002, 20, 559–564.Google Scholar
Gan, T. F.; Shentu, B. Q.; Weng, Z. X. Modification of CeO2 and its effect on the heat–resistance of silicone rubber. Chinese J. Polym. Sci. 2008,113, 3202–3206.Google Scholar
Wang, J. B.; Li, Q. Y.; Wu, C. F.; Xu, H. Y. Thermal conductivity and mechanical properties of carbon black filled silicone rubber. Polym. Polym. Compos.2014, 22, 393–400.Google Scholar
Jiang, M. J.; Dang, Z. M.; Xu, H. P. Enhanced electrical conductivity in chemically modified carbon nanotube/methylvinyl silicone rubber nanocomposite. Eur. Polym. J.2007, 43, 4924–4930.CrossRefGoogle Scholar
Pradhan, B.; Srivastava, S. K. Synergistic effect of three–dimensional multi–walled carbon nanotube–graphene nanofiller in enhancing the mechanical and thermal properties of high–performance silicone rubber. Polym. Int. 2014, á3, 1219–1228.Google Scholar
Gan, L.; Shang, S. M.; Yuen, C. W. M.; Jiang, S. X.; Luo, N. M. Facile preparation of graphene nanoribbon filled silicone rubber nanocomposite with improved thermal and mechanical properties. Compos. Part B Eng. 2015, 69,237–242.CrossRefGoogle Scholar
Chabot, V.; Higgins, D.; Yu, A. P.; Xiao, X. C.; Chen, Z. W.; Zhang, J. J. A review of graphene and graphene oxide sponge: Material synthesis and applications to energy and the environment. Energ. Environ. Sci.2014, 7, 1564–1596.CrossRefGoogle Scholar
Novoselov, K. S.; Geim, A. K.; Morozov, S. V.; Jiang, D.; Dubonos, S. V.; Grigorieva, V. I.; Firsov, A. A. Electric field effect in atomically thin carbon films. Science2004, 306, 666–669.CrossRefGoogle Scholar
Huang, G. J.; Chen, Z. G.; Li, M. D.; Yang, B.; Xin, M. L.; Li, S. P.; Yin, Z. J. Surface functional modification of graphene and graphene oxide. Acta Chimica Sinica (in Chinese)2016, 74, 789–799.CrossRefGoogle Scholar
Yang, Y. K.; He, C. E.; Peng, R. G.; Baji, A.; Du, X. S.; Huang, Y. L.; Xie, X. L.; Mai, Y. W. Non–covalently modified graphene sheets by imidazolium ionic liquids for multifunctional polymer nanocomposites. J. Mater. Chem.2012, 22, 5666–5675.CrossRefGoogle Scholar
Niyogi, S.; Bekyarova, E.; Itkis, M. E.; McWiliams, J. L.; Hamon, M. A.; Haddon, R. C. Solution properties of graphite and graphene. J. Am. Chem. Soc.2006, 128, 7720–7721.CrossRefGoogle Scholar
Hu, H. T.; Wang, X. B.; Wang, J. C.; Liu, F. M.; Zhang, M.; Xu, C. H. Microwave–assisted covalent modification of graphene nanosheets with chitosan and its electrorheological characteristics. Appl. Surf. Sci.2011, 257, 2637–2642.CrossRefGoogle Scholar
Vadukumpully, S.; Gupta, J.; Zhang, Y. P.; Xu, G. Q.; Valiyaveettil, S. Functionalization of surfactant wrapped graphene nanosheets with alkylazides for enhanced dispersibility. Nanoscale2011, 3, 303–308.CrossRefGoogle Scholar
Zhu, D. Y.; Xiao, Z. Y.; Liu, X. M. Introducing polyethyleneimine (PEI) into the electrospun fibrous membranes containing diiron mimics of [FeFe]–hydrogenase: Membrane electrodes and their electrocatalysis on proton reduction in aqueous media. Int. J. Hydro. Energ.2015, 40, 5081–5091.CrossRefGoogle Scholar
Xu, Y. X.; Bai, H.; Lu, G. W.; Li, C.; Shi, G. Q. Flexible graphene films via the filtration of water–soluble noncovalent functionalized graphene sheets. J. Am. Chem. Soc.2008, 130, 5856–5864.CrossRefGoogle Scholar
Vallès, C.; Drummond, C.; Saadaoui, H.; Furtado, C. A.; He, M. S.; Roubeau, O.; Ortolani, L.; Monthioux, M.; Pènicaud, A. Solutions of negatively charged graphene sheets and ribbons. J. Am. Chem. Soc. 2008,130, 15802–15804.CrossRefGoogle Scholar
Hummers, W. S.; Offeman, R. E. Preparation of Graphitic Oxide. J. Am. Chem. Soc.1958, 80, 1339–1344.CrossRefGoogle Scholar
Ramezanzadeh, B.; Haeri, Z.; Ramezanzadeh, M. A facile route of making silica nanoparticles–covered graphene oxide nanohybrids (SiO2–GO); fabrication of SiO2–GO/epoxy composite coating with superior barrier and corrosion protection performance. Chem. Eng. J.2016, 303, 511–528.CrossRefGoogle Scholar
Kou, L.; Gao, C. Making silica nanoparticle–covered graphene oxide nanohybrids as general building blocks for large–area superhydrophilic coatings. Nanoscale2011, 3, 519–528.CrossRefGoogle Scholar
Haeri, S. Z.; Ramezanzadeh, B.; Asghari, M. A novel fabrication of a high performance SiO2–graphene oxide (GO) nanohybrids: Characterization of thermal properties of epoxy nanocomposites filled with SiO2–GO nanohybrids. J. Colloid Inter. Sci.2017, 493, 111–122.CrossRefGoogle Scholar