表面改性石墨烯增强高分子纳米复合材料的拉伸性能  

Tensile properties of surface-modified graphene-reinforced polymer nanocomposites

作　　者：陈加亮 CHEN Jialiang(National Garment and Accessories Quality Supervision Testing Center(Fujian),Fujian Fiber Inspection Center,Fuzhou 350026,China)

机构地区：[1]福建省纤维检验中心,国家纺织服装产品质量监督检验中心(福建),福建福州350026

出　　处：《东华大学学报（自然科学版）》2022年第3期1-7,14,共8页Journal of Donghua University(Natural Science)

摘　　要：针对表面改性石墨烯增强高分子纳米复合材料理论研究不足的现状,采用耗散粒子动力学(dissipative particle dynamics,DPD)和基于DPD的非平衡变形方法研究表面改性石墨烯增强高分子纳米复合体系(P/G-g-T)的拉伸性能。结果表明:增加高分子链的聚合度和石墨烯表面的改性接枝率能够显著提高P/G-g-T的拉伸性能,包括拉伸强度、弹性模量和韧性;在较大的应变条件下,聚合度较大的P/G-g-T有应变硬化的特性和较高的韧性,这主要得益于接枝在石墨烯表面的高分子沿拉伸方向的有序排列。研究揭示了表面改性石墨烯增强、增韧高分子纳米复合材料的机理,可为高性能、多功能高分子纳米复合材料的设计、制备及应用提供理论依据。In response to the lack of theoretical studies on surface-modified graphene-reinforced polymer nanocomposites,the tensile properties of surface-modified graphene-reinforced polymer nanocomposite systems(P/G-g-T)were investigated using dissipative particle dynamics(DPD)and DPD-based nonequilibrium deformation methods.The results show that increasing the polymerization degree of polymer chains and the modified grafting rate on the graphene surface can significantly improve the tensile properties of P/G-g-T,including tensile strength,elastic modulus,and toughness,etc.At larger strain or deformation,the P/G-g-T nanocomposite system has strain-hardening properties and higher toughness,which mainly benefit from the ordered arrangement of the polymer grafted on the graphene surface along the stretching direction.The study reveals that the strengthening and toughening mechanism after introducing surface-modified graphene into polymer matrix,and can provide a theoretical basis for the design,preparation and application of high-performance and multifunctional polymer nanocomposites.

关 键 词：高分子纳米复合材料 拉伸性能 石墨烯 表面改性 耗散粒子动力学 

分 类 号：O631.11[理学—高分子化学]