采用在一定程度下可控的电化学聚合法在碳纤维表面快速一步构建了聚吡咯(Ppy)共轭高分子膜,再利用真空辅助树脂传递模塑技术(VARTM)将碳纤维(CF)与环氧树脂(EP)制备成复合材料。使用扫描电子显微镜和傅里叶红外光谱仪对碳纤维的表面形态和结构进行分析与表征,并通过对碳纤维/环氧树脂复合材料(CF/EP)进行层间剪切强度试验和三点弯曲实验来研究其力学性能。结果表明:与未经处理的CF/EP相比,碳纤维表面具有聚吡咯涂层的CF/EP其层间剪切强度、弯曲强度和弯曲模量分别提升了37.6%、24.3%和37.5%。因此,通过简单高效的一步电聚合法在碳纤维表面修饰聚吡咯涂层,可有效地提高CF/EP的整体力学性能。
Polypyrrole(Ppy) conjugated polymer film was rapidly constructed on the surface of carbon fiber (CF) in one step by electrochemical polymerization controlled under a certain degree,followed by the preparation of CF/epoxy resin(EP) composite via vacuum-assisted resin transfer molding technology (VARTM).The surface morphology and structure of the carbon fibers were analyzed and characterized by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy.The mechanical properties of the composites (CF/EP) were studied by interlaminar shear strength test and three-point bending test.Impressive improvements of 37.6%,24.3% and 37.5% in interfacial shear strength,flexural strength and flexural modulus over those of untreated carbon fiber/epoxy composites (CF/EP) were achieved for composites with Ppy on carbon fiber surface,featuring a simple and efficient one-step electropolymerization method to modify the polypyrrole coating on CF surface could effectively improved overall mechanical properties of CF/EP.
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基金资助
吉林省科学技术厅项目(20200201189JC)
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