低温等离子体改性UHMWPE纤维的表面性能

采用空气低温等离子体改善超高相对分子质量聚乙烯(UHMWPE)短纤维的黏着性,设计正交试验对改性后纤维的黏着性进行测试与分析,确定出较优试验方案;然后对未处理和经较优方案改性后的UHMWPE短纤维的表面形貌、表面化学成分、表面润湿性和强伸性进行测试分析。结果表明:空气低温等离子体改性UHMWPE短纤维黏着性的较优处理条件为功率50 W、压强15 Pa、反应时间120 s,此时,纤维的剥离功是未处理的4.14倍,黏着性得到了大幅度的提升,且单纤维强力损失率仅为3.29%;经较优方案处理后,纤维表面的粗糙程度有所增加,表面润湿性有明显改善,纤维表面的C元素含量明显减少,O、N元素含量有所增加,且出现了相对含量为22.2%的C=O官能团,有利于UHMWPE短纤维黏着性的改善。

Surface Properties of UHMWPE Fiber Treated by Low Temperature Plasma

The air low temperature plasma was used to improve the adhesion of ultra-high molecular weightpolyethylene(UHMWPE) short fiber. The fiber adhesion was tested and analyzed by orthogonal test, andthe optimum testing condition was picked up. Then, some properties of short fibers untreated and modifiedby the optimum testing condition were tested such as surface morphology, surface chemical composition,surface wettability and tensile strength. The results showed that the optimum testing conditions were 50 W,15 Pa, 120 s to improve the adhesion of UHMWPE short fibers treated by air low temperature plasma. Un-der the conditions, adhesion was greatly improved with stripping work being 4.14 times to the untreated fi-bers, and the strength loss rate of single fiber was only 3.29%. After treated by the optimum testing condi-tion, the surface roughness of the fibers increased, and the surface wettability improved obviously; the sur-face contents of O and N increased, the content of C decreased, and a functional group(C=O) was found witha content of 22.2%. All these factors were propitious to the adhesion improvement of UHMWPE short fibers.