微波法制备石墨烯及其功能化对环氧树脂性能的影响  

Microwave preparation and functionalization of graphene and its effect on properties of epoxy resin

作　　者：包旭濠 何云鹏 王朔[2] 孟庆实 BAO Xuhao;HE Yunpeng;WANG Shuo;MENG Qingshi(College of Civil Aviation,Shenyang Aerospace University,Shenyang 110136,China;College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学民用航空学院,沈阳110136 [2]沈阳航空航天大学航空宇航学院,沈阳110136

出　　处：《沈阳航空航天大学学报》2023年第6期8-14,共7页Journal of Shenyang Aerospace University

基　　金：国家自然科学基金(项目编号:51973123)。

摘　　要：为了高效低成本地制备高质量石墨烯,在微波炉中加热可膨胀石墨(graphite intercalation on compounds,GIC)制备膨胀石墨,然后将聚醚胺(D2000)接枝在石墨烯(GnPs)表面,制得功能化石墨烯(D2000-g-GnPs)并分析其表征。随后用超声分散和磁力搅拌制备了环氧树脂(epoxy resin,EP)/石墨烯复合材料黏合剂。研究改性前后石墨烯对增强环氧树脂机械性能和拉伸断裂面表面形貌的影响。实验表明,环氧树脂的拉伸强度、杨氏模量、断裂韧性以及断裂能量释放率都随着石墨烯含量的增加先增加后减少,在改性石墨烯质量分数达到0.3%时复合材料的机械性能达到最大值。拉伸强度达到76.269 MPa,比未改性前的石墨烯/环氧树脂复合材料提高了24.95%;杨氏模量达到1.315 GPa,提高了10.97%;断裂韧性达到1.79 MPa·m0.5,提高了16.23%。此外,添加D2000-g-GnPs使环氧树脂黏合剂的导电性大幅提高,得到较低的渗流阈值为1.0%。In order to prepare high-quality graphene more efficiently and cost-effectively,expanded graphite was prepared by heating a commercial graphene precursor in a microwave oven,and then functionalized graphene(D2000-g-GnPs)was prepared by grafting polyetheramine(D2000)onto the graphene(GnPs)surface.Epoxy resin(EP)/graphene composite binders were then prepared by ultrasonic dispersion and magnetic stirring.The effects of graphene on the improvement of the mechanical properties of epoxy resin and the surface morphology of the tensile fracture surface before and after modification were investigated.The experiments showed that the tensile strength,Young's modulus,fracture toughness and fracture energy release rate of epoxy resin increased and then decreased with the increase of graphene content,and the mechanical properties of composites reached the maximum value when the mass fraction of modified graphene reached 0.3%.The tensile strength,Young's modulus and fracture toughness reached 76.269 MPa,1.315 GPa and 1.79 MPa.m0.5 repectively,which were 24.95%,10.97%and 16.23%higher than those of graphene/epoxy composites before modification.In addition,the addition of D2000-g-GnPs significantly improved the electrical conductivity of the epoxy binder and a low pre-permeation value of 1.0%was achieved.

关 键 词：微波膨胀 石墨烯 机械性能 导电性能 透射电镜 扫描电镜 环氧树脂 

分 类 号：V258[一般工业技术—材料科学与工程]