Three kinds of Lyocell fibers with different cross-sections including circular, H-shape, and Y-shape (abbreviated as O-, H-, and Y-Lyocell) were prepared by a dry-jet wet spinning method. The effects of cross-sectional shape on structure and properties of Lyocell fibers were evaluated. The results showed H-Lyocell and Y-Lyocell exhibited triangular and dumbbell cross-sections, respectively, due to die swell. Both non-roundness factor and crystallinity of different cross-sectional Lyocell fibers were in the order of H-Lyocell > Y-Lyocell > O-Lyocell. All cross-sectional Lyocell fibers showed similar values of fineness and tensile strength. The profiled Lyocell fibers were superior to circular Lyocell fibers in terms of luster, dyeing properties, and moisture regain. The dye uptake and fixation rate of Lyocell fibers were influenced by shape in the order H-Lyocell > Y-Lyocell > O-Lyocell; while for luster and moisture regain the order was Y-Lyocell > H-Lyocell > O-Lyocell. Profiled Lyocell fibers are expected to open broader prospects in different textile or composite fields due to their various advantages versus conventional circular Lyocell fibers.

通过干喷湿纺法制备了具有圆形，H形和Y形的三种不同横截面的莱赛尔纤维（缩写为O-，H-和Y-莱赛尔）。评估了横截面形状对莱赛尔纤维结构和性能的影响。结果显示，由于模头膨胀，H-莱赛尔纤维和Y-莱赛尔纤维分别呈现出三角形和哑铃形横截面。不同横截面的莱赛尔纤维的非圆度因子和结晶度依次为H-莱赛尔> Y-莱赛尔> O-莱赛尔。所有横截面的莱赛尔纤维均显示出相似的细度和拉伸强度值。异型莱赛尔纤维在光泽，染色性能和回潮率方面均优于圆形莱赛尔纤维。Lyocell纤维的染料吸收和固着率受形状的影响，依次为H-Lyocell> Y-Lyocell> O-Lyocell。对于光泽和水分恢复，顺序为Y-莱赛尔> H-莱赛尔> O-莱赛尔。异型莱赛尔纤维与常规的圆形莱赛尔纤维相比具有多种优势，因此有望在不同的纺织品或复合材料领域开辟广阔的前景。