低温等离子体对国产聚酰亚胺纤维的亲水性改性研究

Study on Hydrophilic Modification of Domestic Polyimide Fiber by Low-Temperature Plasma

采用低温等离子体改性技术,对国产聚酰亚胺纤维进行表面改性,从而提高了国产聚酰亚胺纤维的润湿性。对改性后的聚酰亚胺纤维进行表面形貌、表面化学结构、纤维力学性能、纤维静态水接触角以及束纤维芯吸效应的测试与分析,得知低温等离子体改性可以对国产聚酰亚胺纤维的表面进行刻蚀,使光滑的纤维表面出现凹槽,同时可以引入大量的亲水性官能团,提升纤维亲水性。当放电功率为130 W、放电时间为240 s、放电压强为25 Pa时,聚酰亚胺纤维的亲水性得到较大的改善,同时强力损失相对较小。

The low-temperature plasma modification technology was used to modify the surface of the domestic polyimide fiber to improve the wettability of the domestic polyimide fiber.The surface morphology,surface chemical structure,fiber mechanical property,fiber static water contact angle and bundle fiber wicking effect of the modified polyimide fiber were measured and analyzed.It is found that low-temperature plasma modification can etch the surface of domestic polyimide fiber to make grooves appear on the surface of smooth polyimide fiber,and a large number of hydrophilic functional groups can be introduced to improve the hydrophilicity of the fiber.When the discharge power is 130 W,the discharge time is 240 s and the discharge pressure is 25 Pa,the hydrophicity of polyimide fiber is improved the most,and the strenth loss is relatively small.