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Mechanical and thermal performances of epoxy resin/graphitic carbon nitride composites

机译：环氧树脂/石墨碳氮化物复合材料的机械和热性能

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In this paper, a series of graphitic carbon nitride (g-C3N4) was synthesized under different thermal oxidation etching temperatures and epoxy/g-C3N4 composites were prepared via solution blending. The morphology and structure of g-C3N4 were investigated by transmission electron microscope, X-ray diffraction (XRD), Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The tensile fracture morphology and structure of epoxy resin (EP) composites were demonstrated by scanning electron microscopy and XRD, respectively. Mechanical properties of EP composites were characterized by tensile testing, and the thermal performances were investigated by dynamic mechanical thermal analysis and thermal gravimetric analysis. The results revealed that the active groups on g-C3N4 sheets increased under thermal oxidation etching and the C to N ratio of g-C3N4 decreased from 0.94 to 0.76 with the increasing etching temperature. Noticeably, the tensile strength of EP composites was enhanced by 58% with the addition of C3N4-NS-500 and the thermal properties were also improved significantly, including T-0.5 (the decomposition temperature at the mass loss of 50%) increased by 21.5 degrees C and glass transition temperature improved by 8 degrees C. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48598.
机译：在本文中，一个系列石墨氮化碳的（G-C3N4）中的溶液不同的热氧化蚀刻温度下合成和环氧树脂分别通过溶液共混制备/克 - C3N4复合材料。形态和g-C3N4的结构通过透射电子显微镜，X射线衍射（XRD）研究，傅里叶变换红外光谱和X射线光电子能谱。环氧树脂（EP）复合材料的拉伸断裂形态和结构是由扫描电子显微镜和X射线衍射，分别证实。通过拉伸试验EP复合材料的机械性能进行了表征，并通过动态力学热分析和热重分析的热性能进行了研究。结果表明，对于g C3N4片的活性基团下热氧化蚀刻增加，C至G-C3N4的N比从0.94减少至0.76日益增加的蚀刻温度。值得注意的是，EP复合材料的拉伸强度通过58％增强在添加的C3N4-NS-500和热特性的结果也显著改进，包括T-0.5（以50％的质量损失的分解温度）增加了21.5度c和玻璃化转变温度由8摄氏度（℃）2019威利期刊公司J.申请提高。聚合物。 SCI。 2019年，137，48598。

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