功能化石墨烯对聚合物/石墨烯纳米复合材料发泡行为的影响研究

项目名称： 功能化石墨烯对聚合物/石墨烯纳米复合材料发泡行为的影响研究

项目编号： No.51473181

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 郑文革

作者单位： 中国科学院宁波材料技术与工程研究所

项目金额： 85万元

中文摘要： 本研究在已进行的关于石墨烯制备、改性及聚合物/石墨烯纳米复合材料及聚合物微孔发泡研究基础上，利用制备出具有不同结构特性（包括不同C/O比、比表面积和电导率等）的石墨烯，通过对石墨烯进行功能化改性，利用熔融共混制备出不同石墨烯/聚合物体系的纳米复合材料，研究具有不同分子链结构的聚合物与石墨烯在熔融共混下的相互作用及作用机制，实现石墨烯在聚合物中的均匀分散。选择两大类聚合物的代表即非晶的聚苯乙烯（PS）及结晶的聚丙烯（PP）为聚合物基体材料，利用CO2为发泡剂，结合微孔发泡原位成像技术研究石墨烯对聚合物微孔发泡过程中泡孔成核及生长的影响；使用间歇发泡（包括釜压发泡等）及连续挤出发泡等实验方法对聚合物/石墨烯纳米复合材料的发泡行为进行系统研究，研究发泡过程中功能化石墨烯对于聚合物泡孔成核、生长及抑制泡孔聚并与稳定化的影响及微孔结构的形成对于聚合物/石墨烯发泡材料力学、导电和电磁屏蔽性能的影响。

中文关键词： 功能化石墨烯；聚合物/石墨烯纳米复合材料；发泡；泡孔成核与稳定化；发泡材料结构与性能

英文摘要： The proposal is focused on the preparation of polymer/graphene nanocomposites and studies on the foaming behavior of polymer/graphene nanocomposites, based on previous results on the preparation of graphene, functionlized modification of graphene, preparation of polymer/graphene nanocomposites and foaming of polymer and polymer nanocomposites using supercritical CO2 as physical blow agent in my research group. polymer (PP and PS)/graphene nanocomposites will be prepared via direct melt compounding (mixer or twin screw extruder) using modified graphene, in which the graphene has cotrollable C/O ratio, higher surface area and good electrical conductively, prepared using low temperature exfoliation method of graphene oxide(GO). The targeted homogeneous dispersion of graphene in polymer matrix is achieved using the compatibilizer, which will be in situ formed via π-π stacking interaction for PS/graphene nanocomposite and PP(PS)/modified graphene nanocomposites or using commercial PP-MAH and SMA polymer as compatibilizer. The foaming behavior of polymer/graphene nanocomposites is investigated using in situ image technology to reveal the effect of modified graphene on the cell nucleation, cell growth and stabilization of polymer during the foaming process. The polymer nanocomposite foams are prepared by batch foaming(PS matrix), reactor foaming(PP matrix) and continuous extrusion foaming (PP and PS matrixes) using supercritical CO2 as physical blow agent. The mechanical, electrical and EMI properties of polymer/graphene nanocomposite foams are characterized and studied to correlate with the foam structure and morphology.

英文关键词： Functionalized graphene;polymer/graphene nanocomposites;foaming;cell nucleation and stabilization;structure and properties of foaming materials