以国产聚丙烯腈(PAN)基高强中模碳纤维(QZ5526)为研究对象,采用扫描电子显微镜(SEM)、原子力显微镜(AFM)、万能材料试验机、纱线耐磨仪等表征手段分析比较了上浆量分别为0、0.5%、1.0%、1.5%、2.0%、2.5%和3.0%的碳纤维表面物理结构和化学特性,结合耐磨性、悬垂性、表面能以及拉伸强度、层间剪切强度(ILSS)等力学性能实验,探讨了上浆量对国产高强中模碳纤维表面形貌、后加工性能及复合材料界面性能的影响。结果表明:上浆剂含量对纤维的表面粗糙度、化学活性、耐磨性、力学性能和层间剪切性能等影响显著,适宜的上浆量(1.5%左右)有助于改善碳纤维表面性能以及与树脂基体的界面结合能。
Taking polyacrylonitrile (PAN)-based high-strength and medium-mode carbon fiber (QZ5526) as the research object,using scanning electron microscope (SEM),atomic force microscope (AFM),universal material testing machine,yarn wear resistance tester and other characterization methods to analyze and compare the surface physical structure and chemical properties of carbon fibers with sizing agent amount of 0,0.5%,1.0%,1.5%,2.0%,2.5% and 3.0%.Combined with abrasion resistance,drapability,surface energy,tensile strength,interlayer shear strength (ILSS) and other mechanical properties experiments,the influence of the sizing agent content on the surface morphology,post-processing properties and composite interface properties of domestically produced high-strength and medium-model carbon fibers were explored.The results showed that the sizing agent content had significant effects on the surface roughness,chemical activity,abrasion resistance,mechanical properties and interlaminar shear properties of the fiber.A suitable sizing agent amount (about 1.5%) could help improve the surface properties of carbon fibers and the interface binding energy with the resin matrix.
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