超细CaCO3／PP复合纤维的制备和亲水行为研究

通过共混包粘一熔融纺丝法制备超细CaCO3／PP复合纤维，对复合纤维的亲水性能和力学性能进行了研究，通过接触角测量法研究超细CaCO3／PP复合纤维表面能参数的变化，并用FTIR和SEM对纤维结构和表面形态进行分析，结果表明，超细碳酸钙填充改性可使PP纤维接触角降低76．6％，表面能、粘附功、极化度和积极性分量显著提高。FTIR和SEM测试表明，复合纤维表面极性基团的形成和表面形态粗糙化对PP复合纤维亲水性能的改善有重要作用，且在超细CaCO3含量为6％（w）时，纤维性能最佳，断裂强度提高24．07％，模量提高38．40％，接触角下降57％。

Preparation of ultra-fine-CaCO3/PP and its composite fiber hydrophilic behavior

The ultrafine CaCO_3/PP composite fibers were prepared by blend-adhesion and melt-spinning methods.The hydrophilicity and mechanical properties of the composite fiber has been investigated.The surface energy parameters were studied by the contract angle measurements.And the fiber structure and surface morphology were analyzed by FTIR and SEM.The results showed that the contact angle of PP composite fiber decreased by 80%.The surface energy,adhesion work,surface polarity and polar component of the composite fiber were improved significantly.FTIR and SEM indicated that the improvement of hydrophilicity of the composite fibers was mainly influenced by the formation of polar groups and surface roughness on the composite fiber surface.And the properties were best at 6wt%CaCO_3 content,the tensile strength and modulus of the PP fibers were increased by 25%and 38.40%and the contact angle was decreased by 57%.