上浆剂使用浓度对碳纤维性能的影响研究

摘要

The effects of different kinds of concentration of sizing agent on the performances of carbon fibre and interface of its composites were studied by atomic force microscopy （AFM）, and the surface energy along with contact angles was determined by dynamic contact angle analysis test （DCAT） with three different polar liquid. The interracial shear strengths and hygrothermal ageing of carbon fibres micro-composites was also studied. It was found that the grooves on the 2% sized carbon fiber were disappeared. A significant change in the surface energy of these materials was displayed with the decreased yd and increased TP. The results indicate that the concentration has great effect on the micro-composites interface and ageing properties. The 1.5% sized carbon fibre shows better interracial adhesion and ageing property than others.%为了改善碳纤维表观性能及其复合材料界面性能，不同浓度的上浆剂用于碳纤维表面上浆．采用原子力显微镜（AFM）、动态接触角测试仪（DCAT）和微复合材料界面结合强度（IFSS）等研究了上浆剂浓度对碳纤维的表面形貌，表面能及对微复合材料界面性能和耐湿热老化性能的影响．实验结果表明：上浆剂的使用浓度对碳纤维表观性能影响较大．AFM证实使用浓度2％时，碳纤维表面沟槽消失．上浆剂的使用浓度对碳纤维的表面能的影响表现在其色散分量的减小和极性分量的增加，对制备的微复合材料的界面性能和耐湿热老化性能有较大的影响．1．5％使用浓度的上浆剂有助于改善碳纤维表观性能及与树脂基体的界面结合强度和耐湿热老化性能．