One-pot approach to prepare high-performance graphene-reinforced poly(vinyl chloride) using lithium alkyl as covalent bonding agent
One-pot approach to prepare high-performance graphene-reinforced poly(vinyl chloride) using lithium alkyl as covalent bonding agent
复制标题
以烷基锂为共价键合剂一锅法制备高性能石墨烯增强聚氯乙烯
DOI：
10.1039/c4py01110d
复制
发表时间：
2015
影响因子：
4.6
通讯作者：
Tang Tao
中科院分区：
文献类型：
--
作者：
Yao Kun;Zhang Guangchun;Lin Yichao;Gong Jiang;Na Hui;Tang Tao
已经证明了一种新的一锅法用于制备聚氯乙烯（PVC）/石墨烯纳米复合材料，该方法基于使用正丁基锂作为引发剂进行 PVC 链与石墨烯的接枝反应。 FT-IR、XPS、TGA、TEM 和 ICP-OES 成功证实了接枝反应。拉曼测量表明，表面功能化后石墨烯框架的结构完整性得以保留，从而开发出了在 PVC 基体中石墨烯分散良好的均质纳米复合材料。由于所得到的PVC/石墨烯纳米复合材料中界面相互作用的增强和石墨烯分散性的改善，随着变形过程中基体的移动，石墨烯片可以将其随机排列转变为平行于拉伸方向的定向排列。正如预期的那样，填充极低石墨烯含量的 PVC 基体比未经正丁基锂处理的同类材料表现出显着改善的机械性能和导电性。结果表明，合理同时控制石墨烯的分散状态、结构完整性以及石墨烯与聚合物基体之间的界面相互作用对于制备高性能聚合物纳米复合材料非常重要。
A novel one-pot approach has been demonstrated for the preparation of poly(vinyl chloride) (PVC)/graphene nanocomposites based on the grafting reaction of PVC chains to graphene using n-BuLi as an initiator. The grafting reaction was successfully confirmed by FT-IR, XPS, TGA, TEM and ICP-OES. Raman measurements showed that the structural integrity of graphene framework was retained after surface functionalization, leading to the development of homogeneous nanocomposites with well-dispersed graphene in PVC matrix. Because of a strengthened interfacial interaction and improved dispersion of graphene in the resultant PVC/graphene nanocomposites, the graphene platelets could change their random alignment into oriented alignment parallel to the stretching direction with the movement of the matrix during deformation. As expected, the PVC matrix filled with very low loading of graphene showed significantly improved mechanical properties and electrical conductivity over their counterparts without n-BuLi treatment. The results show that it is very important to rationally and simultaneously control dispersion state, structural integrity of graphene and interfacial interaction between graphene and polymer matrix to fabricate high-performance polymer nanocomposites.