低温等离子体与丙烯酸接枝处理对UHMWPE纤维的表面改性

Surface Modification of UHMWPE Fiber by Low Temperature Plasma Treatment and Grafting Using Acrylic Acid

在不同功率、时间、气氛等条件下对超分子量聚乙烯(UHMWPE)纤维进行低温等离子体处理,得出低温等离子体处理的最佳工艺为空气条件下、150W、处理8min;接枝丙烯酸处理的最佳工艺为40℃的水浴下,在1.5 mol/L的丙烯酸甲醇溶液中反应1.5 h。实验结果表明,在维持纤维的力学性能和表面形貌不变的前提下,经低温等离子体和丙烯酸处理后,在纤维长链的侧链引入了极性基团,使纤维与树脂间的粘接性能得到提高。

The effects of power, time and atmosphere of low temperature plasma treatment on the surface modification of ultra-high molecular-weight polyethylene（UHMWPE） fiber were studied. The optimum process was obtained, such as the air condition, 150W and 8 minutes of reaction time. The optimum process of the grafted acrylic on the fiber surface are as follows： methanol as a solvent and 1.5 mol/L of acrylic acid concentration at 40 ℃ for 1.5h. The results show that, via low temperature plasma treatment and grafting by acrylic acid on the surface of UHMWPE fiber, the polar groups are grafted in the side chain of the fiber, so the ability of the chemical bonding with other matrix materials increases, however, the mechanical properties and surface morphology of the fiber keep unchanged.