Direct exfoliation of graphene in methanesulfonic acid and facile synthesis of graphene/polybenzimidazole nanocomposites
Direct exfoliation of graphene in methanesulfonic acid and facile synthesis of graphene/polybenzimidazole nanocomposites
复制标题
甲磺酸中石墨烯的直接剥离及石墨烯/聚苯并咪唑纳米复合材料的简便合成
DOI：
10.1039/c0jm02376k
复制
发表时间：
2011
影响因子：
--
通讯作者：
Yin, Jie
中科院分区：
文献类型：
--
作者：
Wang, Yan;Shi, Zixing;Fang, Jianhua;Xu, Hongjie;Ma, Xiaodong;Yin, Jie
近年来，石墨烯（GP）基聚合物纳米复合材料的新兴领域一直是人们关注的焦点，因为与纯聚合物相比，其在机械、热和电学性能方面表现出无与伦比的改善。然而，这些改进在很大程度上取决于良好剥离和高质量GP的合成。在本文中，我们报告了一种简单的方法，通过液相剥离石墨在甲磺酸（MSA）的GP片材的生产。拉曼光谱、X射线光电子能谱和红外光谱分析表明，所得GP具有低的缺陷密度和低的氧化程度。透射电子显微镜和原子力显微镜进一步证实，所得的GP是在良好的剥离状态。以该GP/MSA溶液为反应介质，通过原位聚合制备了聚[2，2 ′-（对氧二苯撑）-5，5 ′-联苯并咪唑]（OPBI）纳米复合材料。与纯OPBI相比，所得到的OPBI/GP纳米复合材料在添加极少量GP的情况下同时显示出改善的杨氏模量、拉伸应力、韧性、储能模量和热稳定性。高水平的增强归因于聚合物和GP之间良好的分散和有效的应力传递，如断裂表面的SEM图像所证明的，以及高质量GP的优异的固有特性。所有这些特点使得这种简单的过程是一个潜在的路线，低成本和高性能的聚合物纳米复合材料的制造。
The emerging field of graphene(GP)-based polymer nanocomposites has continued to be the focus of considerable interest in recent years because of the unparalleled improvement shown in mechanical, thermal, and electrical properties compared to the neat polymer. However, these improvements largely depend on the synthesis of well-exfoliated and high-quality GP. In this paper, we report a facile method for the production of GP sheets through the liquid-phase exfoliation of graphite in methanesulfonic acid (MSA). Raman, X-ray photoelectron and infrared spectroscopies reveal that the obtained GP has a low-defect density with a low degree of oxidation. Transmission electron microscopy and atomic force microscopy further confirm that the resulting GP is in the well-exfoliated state. Using this GP/MSA solution as a reaction solvent medium, polymer nanocomposites are prepared by in situpolymerization of poly [2,2′-(p-oxydiphenylene)-5,5′-bibenzimidazole] (OPBI). Compared to pure OPBI, the resulting OPBI/GP nanocomposites show simultaneously improved Young's modulus, tensile stress, toughness, storage modulus and thermal stability with the addition of extremely small amounts of GP. The high levels of reinforcement are attributed to the good dispersion and effective stress transfer between polymer and GP as evidenced by SEM images of the fracture surfaces, and the excellent intrinsic properties of the high-quality GP. All these features make this simple procedure a potential route for the fabrication of low-cost and high-performance polymer nanocomposites.
登录
查看更多内容
影响因子：
29.4
作者：
Lee, Jong Hak;Shin, Dong Wook;Yoo, Ji-Beom
通讯作者：
Yoo, Ji-Beom
影响因子：
9.1
作者：
M. Wichmann;K. Schulte;H. Daniel Wagner
通讯作者：
M. Wichmann;K. Schulte;H. Daniel Wagner
影响因子：
64.8
作者：
Stankovich, Sasha;Dikin, Dmitriy A.;Ruoff, Rodney S.
通讯作者：
Ruoff, Rodney S.
影响因子：
19
作者：
Sahoo, Nanda Gopal;Cheng, Henry Kuo Feng;Zhao, Jianhong
通讯作者：
Zhao, Jianhong
影响因子：
13.3
作者：
Okamoto, Minoru;Fujigaya, Tsuyohiko;Nakashima, Naotoshi
通讯作者：
Nakashima, Naotoshi