石墨烯改性对环氧树脂/碳纤维复丝拉伸性能的影响

采用直接分散法和上浆剂法分别制备了环氧树脂/碳纤维复丝,通过红外光谱、分光光度法等分析方法对处理的石墨烯的表面官能团及表面形貌进行表征,借助扫描电子显微镜对碳纤维表面进行微观形貌观察,研究了石墨烯改性对环氧树脂/碳纤维复丝界面性能的影响。结果表明:石墨烯表面成功地接枝了硅烷偶联剂KH-560;接枝硅烷偶联剂KH-560的石墨烯的环氧树脂/碳纤维复丝的拉伸性能优于未经改性的石墨烯的复丝;上浆法制得的环氧树脂/碳纤维复丝的拉伸性能优于分散法制得的复丝的拉伸性能;上浆剂法制备的石墨烯改性的环氧树脂/碳纤维复丝的断裂强力比未经过改性的未上浆的复丝的提高了48.6%,拉伸强度提高了30.4%,断裂伸长率提高了90.9%。

Effect of graphene modification on tensile properties of epoxy resin/carbon multifilament

An epoxy resin/carbon multifilament was prepared by direct dispersion method and sizing process.The surface function groups and morphology of modified graphene were characterized by infrared spectrometry and spectrophotometric method.The micro-morphology of carbon fiber surface was characterized by scanning electron microscopy.The effect of graphene modification on the interfacial properties of epoxy resin/carbon multifilament was studied.The results showed that silane coulping agent KH-560 has been successfully grafted on the surface of graphene;the epoxy resin/carbon multifilament containing graphene grafted with silane coupling agent KH-560 was superior to the multifilament containing unmodified graphene in tensile properties;the sizing process contributed better tensile properties to epoxy resin/carbon multifilament than the dispersion method;and as compared with unmodified multifilament,the graphene-modified epoxy resin/carbon multifilament prepared by sizing process had increments of 48.6%,30.4% and 90.9% in the breaking strength,tensile strength and elongation at break,respectively.