甘油涂层对常压等离子体射流处理超高模量聚乙烯的影响研究

Effect of the glycerol coating interlayer on UHMPE fibers treated by atmospheric pressure plasma jet

在工业化生产中,常压等离子体对基体的改性的一个潜在问题是助剂被基体吸收或包覆于基体表面上,影响等离子体表面的改性效果.以甘油涂层溶液作为吸收助剂,研究了其对常压等离子体射流(APPJ)对超高模量聚乙烯纤维(UHMPE)处理效果的影响,通过扫描电镜(SEM)和纤维粘结强度测试对纤维的表面形态和界面剪切力的变化进行了分析表征.扫描电镜显示经APPJ处理的UHMPE纤维表面粗糙度有所增加,而界面剪切力(IFSS)随涂层浓度的增加不断减小;同时,干态和湿态的等离子处理条件下,界面剪切力的下降趋势一致,说明甘油涂层的存在会削弱等离子体射流处理UHMPE纤维的刻蚀效果,并且降低纤维与树脂间的粘结性能.

In industrial production area, a potential problem for the atmospheric pressure plasma jet treatment （APPJ） is that the existent agents absorbed by the substrate may influence the plasma surface modification processes. In order to investigate the etching effect of ultra high modulus polyethylene （UHMPE） fibers treated by helium APPJ, different concentrations of glycerol solution were selected as the absorbed agents. The results are investigated by SEM and interfacial shear strength （IFSS） test. The SEM images showed that the surface roughness was increased, and the IFSS value decreased as the concentration of glycerol coating solution increased. Meanwhile, the IFSS value had the same decreasing trend under the dry and wet treatment condition. It indicates that the existed glycerol coating will quench the etching effect of APPJ treating UHMPE;furthermore decrease the adhesion between fiber and resin.