新型水性上浆剂对碳纤维及其复合材料界面性能的影响

Effect of a New Water-based Sizing Agent on Properties of Carbon Fibers and Their Composites

使用新型水性上浆剂O3PPA对碳纤维表面进行改性处理,使用聚己内酰胺树脂为基体制备碳纤维/聚己内酰胺树脂复合材料,使用X射线光电子能谱仪(XPS)、扫描电镜(SEM)、纤维强伸度仪(XQ-1A)、万能材料试验机等手段表征改性后的碳纤维和碳纤维/聚己内酰胺树脂复合材料。结果表明,O3PPA的最佳上浆质量分数和吸附量分别为1%和5 mg/g。经O3PPA处理的碳纤维单丝的断裂强度提高了12%,碳纤维短丝在聚己内酰胺树脂中的分散性明显提高。而经O3PPA处理的碳纤维/聚己内酰胺树脂复合材料,其弯曲强度和层间剪切强度比未处理分别提高了35%和46%。

The surface of carbon fibers was firstly modified with a new water borne sizing agent O3PPA,and then composites of the modified carbon fibers/polycaprolactam resin were prepared with polycaprolactam resin as matrix.The above prepared products were characterized by means of X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM),fiber strength extensometer and universal material testing machine.The results show that the optimum mass fraction and adsorption capacity of O3PPA were 1%and 5mg·g-1respectively.The fracture strength of the O3PPA modified carbon fiber monofilament increased by 12%and the dispersibility of short carbon fibers in polycaprolactam resin was significantly improved.Furthermore,the flexural strength and interlaminar shear strength of the modified carbon fibers/polycaprolactam resin composite increased by 35%and 46%respectively compared with those of plain carbon fibers/polycaprolactam resin composite.