改性石墨烯/天然橡胶复合材料的制备及性能  

Preparation and Properties of Modified Graphene/Natural Rubber Composite Materials

作　　者：辛华[1] 赵星[1] 任庆海[1] 张雯汐 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《精细化工》2017年第5期513-518,共6页Fine Chemicals

基　　金：国家自然科学基金(51603117);陕西科技大学博士科研启动基金项目(BJ12-27)~~

摘　　要：用γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)对石墨烯(GE)进行改性,将得到的改性石墨烯(KHGE)与天然橡胶(NR)进行混炼制备出改性石墨烯/天然橡胶(KH-GE/NR)复合材料。采用傅里叶变换红外光谱仪、拉曼光谱仪、X射线衍射仪和扫描电镜对改性前后石墨烯的结构进行了表征,考察了KH-GE/NR复合材料的硫化性能、力学性能和导电性能。结果表明:KH-570对GE改性后,增大了GE的层间距,使GE在NR基体中的分散得到了改善;随着KH-GE用量的增加,KH-GE/NR复合材料力学性能提高,当KH-GE质量比(即KH-GE质量占NR质量的百分数,下同]为1.0%时,KH-GE/NR复合材料的拉伸强度和断裂伸长率分别为17.57 MPa和645.48%,比未添加KH-GE的复合材料分别提高了122%和21%,当KH-GE质量比为2.5%时,KH-GE/NR复合材料的体积电阻率最终下降约3个数量级。Modified graphene/natural rubber （KH-GE/NR） composite materials were prepared by mechanical mixing process with natural rubber （NR） and γ-methacryloxy propyl trimethoxyl silane （KH-570） modified graphene （KH-GE）. The structure of graphene and KH-GE was characterized by Fourier infrared spectroscopy （ FTIR ） , Raman spectroscopy, X-ray diffraction （ XRD ）, and scanning electron microscope （SEM）. In addition, the vulcanization characteristics, mechanical properties and electrical conductivity of KH-GE/NR composite materials were investigated. The results showed that graphene was successfully modified by KH-570 and the layer space of KH-GE enhanced, which was favorable for the KH-GE dispersion in NR matrix. Meanwhile, the mechanical properties of KH-GE/NR composite materials increased with increasing of additive amount of KH-GE. When mass fraction of KH- GE was 1.0% （ based on the mass of NR） , the tensile strength and elongation at break of obtained composite materials were 17.57 MPa and 645.48% ,respectively. In comparison with that of the rubber without addition of KH-GE ,the tensile strength of composite materials was enhanced by 122%, and the elongation at break was enhanced by 21%. The research also confirmed that the volume resistivity of KH-GE composite materials decreased approximately three orders of magnitude.

关 键 词：改性石墨烯 天然橡胶 微观形貌 力学性能 体积电阻率 功能材料 

分 类 号：TQ332.5[化学工程—橡胶工业]