• 文献标题:   Enhanced stress transfer and thermal properties of polyimide composites with covalent functionalized reduced graphene oxide
  • 文献类型:   Article
  • 作  者:   CAO L, SUN QQ, WANG HX, ZHANG XX, SHI HF
  • 作者关键词:   polymermatrix composites pmcs, mechanical propertie, stress transfer, surface treatment
  • 出版物名称:   COMPOSITES PART AAPPLIED SCIENCE MANUFACTURING
  • ISSN:   1359-835X EI 1878-5840
  • 通讯作者地址:   Tianjin Polytech Univ
  • 被引频次:   68
  • DOI:   10.1016/j.compositesa.2014.10.007
  • 出版年:   2015

▎ 摘  要

This work prepares (3-aminopropyl) trimethoxysilane (APTMS)-functionalized reduced graphene oxide (APTMS-rGO)/polyimide (PI) composite (APTMS-rGO/PI) through in-situ polymerization. NH2-functionalized rGO coupled by APTMS demonstrates the good reinforced efficiency in mechanical and thermal properties, which is ascribed to the covalent-functionalized PI matrix by APTMS-rGO sheets. The uniform dispersion of APTMS-rGO increases the glass transition temperature (Tg) and the thermal decomposition temperature (Td), exhibiting 21.7 degrees C and 44 degrees C improvements, respectively. The tensile strength of the composites with 0.3 wt% APTMS-rGO is 31% higher than that of neat PI, and Young's modulus is 35% higher than that of neat PI. Raman spectroscopy show the obvious G band shift, and also clearly demonstrates the enhanced interfacial interaction between rGO nanofillers and PI matrix. The high mechanical property of the APTMS-rGO/PI composites is attributed to the covalent functionalized GO by NH2 groups and its good dispersion in comparison with GO. (C) 2014 Elsevier Ltd. All rights reserved.