摘要
Abstract
To investigate the influence of alkali treatment with different mass concentrations of NaOH on structure and properties of blended yarns with various kapok fiber content, FHR spectra, X-ray diffraction (XRD), weight loss analysis, capillary rise height, exhaustion and mechanical properties of yarns were observed before and after alkali treatment. The results showed that after scouring process, the weight loss and capillary effect significantly increased but breaking strength less increased with increasing kapok fiber content; after alkali mercerization process, without any apparent change of cellulosic chemical compositions, mereerization treatment led to lower degree of crystallinity for blended yarns by destroying crystalline structure and finally parts of cellulose Ⅰ were transformed into cellulose Ⅱ. Meanwhile, as the content of kapok fiber increased, the hygroscopicity of yarns significantly improved while the increased value of breaking strength was less. However, the higher kapok fiber content, the lower dye exhaustion and light color together with negative chromatism. In contrast to different alkali treatment processes, it could be found that kapok fiber had rather poor alkali resistance than cotton fiber. Therefore, relatively mild alkali treatment conditions for kapok fiber must he necessary in dyeing and finishing processes.关键词
木棉纤维/碱处理/形态结构/物理性能Key words
kapok fiber/alkalization treatment/fiber structure/physical properties分类
轻工纺织
