低温等离子体处理山羊绒纤维力学性能的多指标优化

Multi- target optimization of low-temperature plasma processing on mechanical properties of cashmere fiber

采用空气低温等离子体(LTP)技术对山羊绒纤维进行表面改性处理,重点研究低温等离子体处理压强、功率和时间等参数对山羊绒纤维力学性能的影响,利用矩阵分析法对多指标试验结果进行优化,计算出各因素水平对纤维强伸性试验结果影响的权重,并根据权重大小确定最优方案以及各个因素对强伸性影响的主次顺序。对经等离子体处理前后的纱线润湿性进行测试。分析结果表明:低温等离子体处理不会对纤维的主体强伸性能造成较大影响。较佳工艺条件为:压强15 Pa,功率70 W,时间90 s;等离子体处理后纱线的润湿性能有很大的改善,表现为毛细高度值上升55.43%。这为纤维及其制品的后续开发提供了一定的理论依据。

Low temperature plasma treatment （LTP） using air gas was applied to cashmere fibers in this research. The effect of the processing parameters, such as the cabinet pressure, the discharge power and the exposure time on the mechanical properties of cashmere were studied. Matrix analysis method was used to optimize the process of surface modification of cashmere fiber by air LTP. The weight of the factors which have influence on the results could be figured out by this method. According to the weight, the optimal schema of the orthogonal design and the order of the factor could be easily determined. We also tested the wettability of cashmere yarn. The results showed that the plasma treatment can be used as an effective technique for modifying the surface properties of cashmere fiber without much alteration of the mechanical property, and the optimized air-low-temperature plasma treatment condition is as follows： the cabinet pressure is 15 Pa, discharge power is 70 W, and the exposure time is 90 s. The height of capillary effect improved by 55.43 % than that of no modification. The analysis above can provide certain theory evidence to further development of fiber and relevant textiles.