摘要
采取不同浓度的磷酸水溶液对芳纶纤维进行表面处理,并对不同处理条件下芳纶纤维的单丝强度、表面性质及其环氧树脂复合材料的界面性能进行了分析和测试。结果表明:20 wt%磷酸溶液处理的芳纶纤维,纤维表面含氧官能团含量最高;继续提高磷酸溶液的浓度,含氧官能团含量下降,纤维表面趋于平整,单丝强度上升。用20 wt%磷酸溶液处理芳纶纤维,纤维/环氧树脂基复合材料的层间剪切强度达到62 MPa,界面剪切强度提高18%,是一种简单有效的表面处理方法。纤维表面粗糙度和纤维表面含氧官能团的数量是影响芳纶纤维/环氧树脂复合材料界面结合性能的关键因素。
The Kevlar fibers were treated by phosphorous acid（PA） solutions of different concentrations. The surface properties of the treated Kevlar fiber and the interfacial properties of the fiber/epoxy resin composites were investigated. The results show that the amount of the oxygenous functional groups on the surface reaches a maximum after being treated with 20 wt% PA solution. The amount of the oxygenous functional groups and the surface roughness decrease as the concentration of PA solution increases, but the filament strength rises. After being treated with 20 wt% PA solution, the interlaminar shear strength（ILSS） of Kevlar fiber/epoxy composites reaches 62 MPa and the interfacial shear strength（IFSS） of Kevlar fiber/epoxy composites increases by 18%. The amount of the functional groups on the fiber surface and the surface roughness are the crucial factors to improve interfacial properties of Kevlar fiber/epoxy composites .
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2007年第3期7-12,共6页
Acta Materiae Compositae Sinica
