截面形状对聚酰胺6/石墨烯复合纤维性能的影响

通过母粒共混熔融纺丝法制备了圆形、三角形和十字形截面的聚酰胺6/石墨烯复合纤维。采用光学显微镜观察了纤维的截面形貌并计算其异形度,采用负离子测试仪、远红外发射率测试仪、恒温恒湿干燥箱表征了不同截面纤维的负离子释放性能、远红外辐射性能和纤维吸湿及其干燥速度。研究表明:圆形、三角形和十字形截面纤维的异形度分别达到6.31%、34.80%和58.29%。相对而言,异形度增大,会明显影响纤维的负离子释放浓度、吸湿速度及干燥速度,其中十字形截面纤维的负离子释放浓度最高达到1 820个/cm^3;另一方面,异形度的变化不会对纤维远红外辐射能力产生明显的影响,其远红外发射率在0.90~0.93,远红外辐射温升约为1.70℃。

Effect of Cross-Sectional Morphology on Properties of Polyamide 6/Graphene Composite Fiber

Round, triangular and cross-shaped polyamide 6/graphene composite fibers were prepared by master batch blending melt spinning. The cross-sectional morphology of these fibers were observed by optical microscope and their profile degree were calculated. The negative ion disengagement and far infrared radiation properties of these fibers with different cross-sectional morphology were characterized by negative ion tester, far-infrared emissivity tester and constant temperature and humidity drying oven. The results showed that the profile degree of round, triangular and cross-shaped fibers was 6.31%, 34.80% and 58.29%, respectively. Relatively speaking, with the increase of profile degree, the release rate of negative ion, moisture absorption rate and drying rate obviously enhanced. The release concentration of negative ion of cross-shaped fiber reached 1 820/cm~3. On the other hand, the profile degree had little effect on the far-infrared performance of the composite fibers. The far-infrared emissivity of the fiber was about 0.90～0.93,and the far-infrared radiation temperature rised by 1.70 ℃.