摘要
采用新型碱复合溶剂NaOH／硫脲／尿素水溶液作为溶剂溶解纤维素，对纤维素溶液的流变性能进行探索，从而为纤维素／NaOH／硫腑尿素溶液纺丝提供理论依据。研究结果表明，纤维素溶液表现出非牛顿流体的性质，溶液的粘流活化能随纤维素质量分数以及剪切速率的不同而有所差异，纤维素溶液的结构黏度指数随着温度的升高、纤维素质量分数的增大而增大。5～25℃是所测的纤维素溶液纺丝的适宜温度范围，随着温度的升高，凝胶点开始出现，且凝胶点随着温度的升高向高频率的方向移动。随着纤维素质量分数的增大，纤维素溶液凝胶温度降低。
A novel composite solvent NaOH/thiourea/urea aqueous solution was adopted as solvent to dissolve the cellulose. The rheological properties were studied, so as to get theoretical basis of wet spinning of cellulose in NaOH/thiourea/urea aqueous solutions. Cellulose solution showed non-newtonian fluid properties. Viscous flow activation energy of the cellulose solution was different with the change of mass fraction and the shear rate. The structural viscosity index of the cellulose solution increased as the temperature and the mass fraction increased. 5-25℃ was a suitable temperature range for the cellulose solution wet spinning. The gel point had a trend of moving to the high-frequency direction as the temperature increased. The gel temperature of the cellulose solution got lower when the mass fraction increased.
出处
《纤维素科学与技术》
CAS
CSCD
2013年第3期62-69,共8页
Journal of Cellulose Science and Technology
