This paper reports a feasible method for covalent functionalization of graphene oxide (GO) by using maleic anhydride (MAH), and the fabrication of composites with bismaleimide (BMI) resin. The synthesized MAH functionalized GO (MAH-GO) nanosheets were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectra (XPS), X-ray diffraction (XRD) and Raman spectroscopy. Furthermore, the chemical interactions between MAH-GO and BMI resin were verified, which facilitated the dispersion and exfoliation of MAH-GO in the resin matrix. As a consequence, the MAH-GO/BMI composites showed significantly improved impact strength, tensile strength, elastic modulus and bending strength as compared to neat BMI resin and GO/BMI composites. The SEM photographs showed that the MAH-GO/BMI composites exhibited typical ductile fracture with dimples. The study also indicated that the thermal stability of BMI resin was improved by the addition of MAH-GO.

中文翻译：

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共价官能化氧化石墨烯增强双马来酰亚胺复合材料的机械和热性能

本文报道了一种可行的方法，可通过使用马来酸酐（MAH）对氧化石墨烯（GO）进行共价官能化，以及与双马来酰亚胺（BMI）树脂复合材料的制备。合成的MAH功能化GO（MAH-GO）纳米片通过傅立叶变换红外光谱（FT-IR），X射线光电子能谱（XPS），X射线衍射（XRD）和拉曼光谱进行了表征。此外，验证了MAH-GO与BMI树脂之间的化学相互作用，这促进了MAH-GO在树脂基体中的分散和剥落。结果，与纯BMI树脂和GO / BMI复合材料相比，MAH-GO / BMI复合材料显示出显着改善的冲击强度，拉伸强度，弹性模量和弯曲强度。SEM照片显示MAH-GO / BMI复合材料表现出典型的韧性断裂和凹痕。研究还表明，通过添加MAH-GO可以改善BMI树脂的热稳定性。