The surfaces of glass fabric (GF) were attached with multi-walled carbon nanotubes (MWCNTs) through electrostatic absorption and physical deposition methods, thus the MWCNTs attached GF reinforced epoxy composites based on the GF-d-CNTs and GF-a-CNTs multiscale reinforcements were prepared by vacuum-assisted resin infusion molding (VARIM) technique.Tensile properties, flexural properties, interlaminar shear strength, dynamic viscoelasticity and microstructure of composites were measured and characterized using the static and dynamic mechanics methods, scanning electron microscope, Fourier transform infrared spectroscopy, respectively.The results show that the network structures of MWCNTs attached GF, like "nanobarbed wires", are identified to improve the fiber/matrix adhesion strength and the toughness of resin through the micromechanical interlocking, which exhibits an evident enhancement in glass transition temperature (Tg).As compared to the GFRP without MWCNTs, the mechanical properties of GF-d-CNTs composites are significantly higher, the tensile strength and modulus, flexural strength and modulus and interlaminar shear strength of GF-d-CNTs composites increased by 14.5%, 37.9%, 26.2%, 36.6% and 31.5%, respectively.Moreover, the Tg of GF-a-CNTs composites is improved by 8.9℃.%通过物理沉积法和静电吸附法在玻璃纤维织物(GF)表面包覆多壁碳纳米管(MWCNTs),制备GF-d-CNTs和GF-a-CNTs两种多尺度增强体,采用真空灌注工艺制备MWCNTs-GF增强环氧复合材料.采用静态、动态力学法、扫描电镜、红外光谱等分析手段,对复合材料的拉伸、弯曲、层间剪切、黏弹性和微观组成结构表征.结果表明:MWCNTs包覆于GF表面形成"倒刺"结构,并通过啮合作用增强了复合材料界面的强度和树脂韧性,提高了复合材料的玻璃化温度(Tg)等;与纯GF复合材料相比,GF-d-CNTs复合材料的拉伸强度和模量分别提高14.5%和37.9%,弯曲强度和模量分别提高26.2%和36.6%,层间剪切强度提高31.5%;GF-a-CNTs复合材料的Tg提高了8.9℃.
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