Abstract
The graphene oxide was modified by coupling agent (KH-550). The polyimide/graphene treated by KH-550 (PI/KG) composite were prepared by in situ polymerization from 4,4′-diaminodiphenyl ether (ODA), 2,2-bis(4- (3,4-dicarboxyphenoxy) phenyl) propane dianhydride (BPADA), and modified graphene. The structure and morphology of the composite membranes were analyzed by Fourier transform infrared spectroscopy (FT-IR) and X ray diffraction. Compared to pure PI system, the tensile strength and elongation at break of PI/KG-4 composite, increasing by 26.4 and 24.1 %, was 134 MPa and 9.8 %, respectively. The 5 % mass loss temperature of polyimide system was about 486.1 °C, and the PI/KG-6 composite was 493.8 °C. PI/KG composites have a better thermal stability and a higher thermal conductivity compared to PI system with the increasing of KG content.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (No. 51407134), (Innovative Research Group, No. 51221005), China Postdoctoral Science Foundation (No. 2016M590619), Natural Science Basic Research Plan in Shaanxi Province of China (No. 2015 JM5215), Special Scientific Research Program of Shaanxi Provincial Department of Education (No. 16JK1043), Key Project of Baoji University of Arts and Sciences (No. ZK16072), Baoji Engineering Technology Research Center for Ultrafast Optics and New Materials (No. 2015CXNL-1-3). A Feng is supported by scholarship from the China Scholarship of Council (No. 201508615058). We acknowledge the Taishan Scholars Advantageous and Distinctive Discipline Program of Shandong Province for supporting the research team of energy storage materials.
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Wu, G., Cheng, Y., Wang, Z. et al. In situ polymerization of modified graphene/polyimide composite with improved mechanical and thermal properties. J Mater Sci: Mater Electron 28, 576–581 (2017). https://doi.org/10.1007/s10854-016-5560-8
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DOI: https://doi.org/10.1007/s10854-016-5560-8