马来酸酐功能化氧化石墨烯/天然胶乳复合材料的制备与性能

Preparation and characterization of maleic anhydride functional graphene oxide/natural latex composites

采用马来酸酐(MAH)接枝改性氧化石墨烯(GO)制得MAH功能化改性GO(MAH-GO),采用乳液共混法制备MAH-GO/天然胶乳(MAH-GO/NR)复合材料。考察MAH-GO用量对MAH-GO/NR复合材料力学性能、分散相态与动态加工性能的影响。结果表明:MAH成功接枝改性GO;MAH-GO含量为1.0%时,复合材料的拉伸强度为25.63MPa,较NR的14.13MPa提高了81.4%,且分散较为细致均匀;随着MAH-GO含量的增加,复合材料的Payne效应越明显,且剪切变稀行为更显著。MAH接枝改性GO,有助于提高填料在橡胶基体中的分散及复合材料抵抗变形的能力,可制备高性能的石墨烯/橡胶复合材料。

Maleic anhydride(MAH) functionally-modified GO(MAH-GO) was prepared by grafting modified graphene oxide(GO) with MAH,and MAH-GO/natural latex(MAH-GO/NR) composites were further prepared by emulsion blending.The effects of MAH-GO dosage on mechanical properties, dispersion phase and dynamic machining properties of MAH-GO/NR composites were investigated.The results showed that, MAH was successfully grafted into GO and the tensile strength of the 1.0% MAH-GO/NR composite reached to 25.63 MPa, which increased by 81.4% compared with14.13 MPa of NR;moreover, the dispersion was more detailed and uniform.With the increase of the MAH-GO content, the more obvious the Payne effect of the MAH-GO/NR composite material was, and the more significant the behavior of the shear thinning presented.MAH grafted into modification of GO was helpful to improve the dispersion of filler in rubber matrix and the deformation resistance of composites, which contributed to prepare high-performance graphene/rubber composites.