Fabrication of Spirocyclic Phosphazene Epoxy-Based Nanocomposites with Graphene via Exfoliation of Graphite Platelets and Thermal Curing for Enhancement of Mechanical and Conductive Properties
Fabrication of Spirocyclic Phosphazene Epoxy-Based Nanocomposites with Graphene via Exfoliation of Graphite Platelets and Thermal Curing for Enhancement of Mechanical and Conductive Properties
复制标题
通过石墨片剥离和热固化制备石墨烯螺环磷腈环氧基纳米复合材料，以增强机械和导电性能
DOI：
10.1021/ie400483x
复制
发表时间：
2013-07-31
影响因子：
4.2
通讯作者：
Wu, Dezhen
中科院分区：
文献类型：
--
作者：
Feng, Hua;Wang, Xiaodong;Wu, Dezhen
采用石墨薄片剥离和热固化工艺制备了螺环磷腈环氧树脂（sp -环氧树脂）与石墨烯纳米复合材料。透射电镜、拉曼光谱和x射线光电子能谱证实了石墨烯的化学剥落和随后的热还原。透射电镜观察还表明，还原后的氧化石墨烯以单层或多层的形式均匀地分散在sp -环氧树脂基体中。石墨烯的存在改善了纳米复合材料的拉伸和弯曲性能，因为石墨烯片与基体接触的表面积很大。这些纳米复合材料在玻璃化转变温度、热分解温度和储存模量方面也取得了相当大的提高。值得强调的是，sp -环氧树脂/石墨烯纳米复合材料还具有0.375 vol %的低渗透阈值，并且在石墨烯体积分数高于0.75 vol %时具有高导电性。
Nanocomposites of a spirocyclic phosphazene epoxy (SP-epoxy) resin with graphene were prepared through the exfoliation of graphite platelets and thermal curing process. Transmission electric microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy confirmed the chemical exfoliation and following thermal reduction for the graphene. The TEM observation also demonstrated that the reduced graphene oxide, as the single- and/or few-layered stacking sheets, was homogeneously dispersed in the SP-epoxy matrix. The presence of graphene improved both the tensile and flexural properties of the nanocomposites as a result of the great surface area of graphene sheets in contact with the matrix. These nanocomposites also achieved a considerable increase in glass transition temperature, thermal decomposition temperatures, and storage modulus. It is highly emphasized that the SP-epoxy/graphene nanocomposites also presented a low percolation threshold of 0.375 vol % and achieved high electrical conductivity at a volume fraction of graphene higher than 0.75 vol %.