大豆蛋白质纤维的结构研究(Ⅲ):共混结构

Study on the soybean protein fiber structure (Ⅲ):the cross-blend structure

对大豆蛋白质纤维 (PVA SPF)的形态结构、共混结构以及各级原纤结构进行了研究 ,PVA SPF的横截面呈多种不规则的非圆形 ,纵向表面较光滑 ,伴有某些条纹和沟槽。与一般湿法纺丝成纤的结构不同 ,PVA SPF不呈皮芯结构 ,只有 0 2 μm左右的表皮层 ,应视为全芯层结构。在共混结构中大豆蛋白呈分散相 ,聚乙烯醇呈连续相 ,分散相的分布是随机的、均匀的 ,但纤维的表皮层是聚乙烯醇组分构成的 ;在各级原纤结构中 ,PVA SPF存在着明显的巨原纤结构 ,直径为 1μm左右。

The morphological structure,blending structure and all grades fibrillar structure of the PVA SPF were studied. The cross section of the PVA SPF appears anomalous noncircular,the longitudinal surface of it is slick with some stripes and grooves. Different from other wet spinning fibers,the PVA SPF is not skin core structure and about 0 2 μm thick cuticular layer,so it is clearly all core structure. The soybean protein is dispersed phase which is distributed stochastic and even,and the polyeinyl alcohol is continuous phase in the whole blending structure. The content of the fiber's cuticular layer is polyeinyl alcohol. There are obvious macrofibril structure which diameter is about 1 μm.