【摘要】 使用单宁酸（TA）对超高分子量聚乙烯（PE-UHMW）纤维进行表面改性，研究了金属离子种类及反应时间对单宁酸与金属离子（TA-[M]）改性对PE-UHMW纤维性能的影响，并在TA-[M]改性溶液中引入聚乙烯亚胺（PEI），研究了PEI分子量对TA-[M]-PEI改性PE-UHMW纤维性能影响，以及PEI对TA涂层稳定性的影响。结果表明，TA涂层成功涂覆在PE-UHMW纤维表面，在纤维表面引入了羟基官能团。TA-Fe改性12 h后纤维与环氧树脂（EP）的界面剪切强度较改性前提高了102.03%；与聚氨酯树脂（PU）界面剪切强度提升了97.78%。TA-Fe改性12 h后纤维与PU的界面粘接强度提高了44.35%；与EP的界面粘接强度提高了58.50%。氨基化合物PEI能够改善TA涂层的稳定性，超声清洗实验后PE@TA-Fe-PEI600比PE@TA-Fe界面黏结强度下降少。更多还原

【Abstract】 In this paper, tannic acid(TA) was used to modify the surface of ultra-high molecular weight polyethylene(PE-UHMW) fiber. The effects of metal ion type and reaction time on the properties of PE-UHMW fiber modified by tannic acid and metal ion(TA-[M]) were studied. Polyethyleneimine(PEI) was introduced into TA-[M] modified solution.The effect of PEI molecular weight on the properties of TA-[M]-PEI modified PE-UHMW fiber and the effect of PEI on the stability of TA coating were studied. The results indicated that the TA coating was successfully coated on the surface of PE-UHMW fiber, and the phenolic hydroxyl functional group was introduced on the surface of the fiber. The interfacial shear strength between fiber and epoxy resin(EP) increased by 102. 03 % after TA-Fe modification for 12 h.The interfacial shear strength with polyurethane resin(PU) increased by 97. 78 %. The interfacial bonding strength between fiber and PU increased by 44. 35 % after TA-Fe modification for 12 h. The interfacial bonding strength with EP increased by 58. 50 %. The amino compound PEI can improve the stability of TA coating. After ultrasonic cleaning experiment, the interfacial bonding strength of PE@TA-Fe-PEI600 decreased less than that of PE@TA-Fe.更多还原