• 文献标题:   A graphene hybrid material functionalized with POSS: Synthesis and applications in low-dielectric epoxy composites
  • 文献类型:   Article
  • 作  者:   YU WQ, FU JF, DONG X, CHEN LY, SHI LY
  • 作者关键词:   nano composite, polymermatrix composites pmcs, electrical propertie, thermal propertie
  • 出版物名称:   COMPOSITES SCIENCE TECHNOLOGY
  • ISSN:   0266-3538 EI 1879-1050
  • 通讯作者地址:   Shanghai Univ
  • 被引频次:   40
  • DOI:   10.1016/j.compscitech.2013.12.016
  • 出版年:   2014

▎ 摘  要

A graphene hybrid material functionalized with octa-aminophenyl polyhedral oligomeric silsesquioxanes (OapPOSS) was synthesized and a new application of OapPOSS-g-GO was reported. The structure of OapPOSS-g-GO was confirmed by TEM, HRTEM, SEM, FTIR, XRD, Raman and Uv-vis. The OapPOSS functionalized graphene nanosheets can disperse homogeneously in various organic solvents. Moreover, the thermal stability of the OapPOSS-g-GO was improved and the initial thermal decomposition temperature was significantly increased from 75.2 to 394.5 degrees C compared to that of pure GO by thermal gravimetric analysis (TGA). With the incorporation of only 0.2 wt% OapPOSS-g-GO, at 10(4) Hz the dielectric constant and dielectric loss of OapPOSS-g-GO/epoxy composites dropped by 9% and 49% compared to the neat epoxy composites. This dramatically reduced dielectric constant and dielectric loss can be explained in terms of cage silsesquioxane cores of the OapPOSS and the movement of OapPOSS and polymer chains being limited by GO nano-platelet, resulting in a loose and the immobile epoxy structure. This approach provides a strategy to reduce the dielectric constant of epoxy composite materials with ultra-low filler content. (C) 2013 Elsevier Ltd. All rights reserved.