摘要
选用黏均分子量分别为1.59×105和3.27×105的海藻酸钠(A)和海藻酸钠(B),用旋转黏度计研究了两种海藻酸钠溶液的流变性,用热重分析(TGA)、扫描电子显微镜(SEM)研究了海藻纤维的热性能及形态结构。结果表明:海藻酸钠溶液的流变行为具有一般非牛顿流体的基本特征;随剪切速率的增加,溶液黏度下降;温度升高,溶液黏度下降,溶液的非牛顿指数、黏流活化能、结构黏度指数(η)都发生变化;海藻酸钠B的η比海藻酸钠A的较低,可纺性较好;海藻纤维具有良好的热稳定性,其表面具有沟槽结构,较好的吸湿性。
The rheological behavior of sodium alginate （A） and （B） with the viscous average molecular mass of 1.59 × 10^5 and 3.27 ×10^5 was studied with a rotational viseometer. The thermal properties and morphology of the resulted alginate fibers were studied by thermogravimetrie analysis（TGA） and scanning electron microscopy（SEM）. The results showed that the sodium alginate solutions belonged to non-Newtonian fluid; the viscosity of the solution decreased with the increase of shearing rate; the non- Newtonian index, viscous flow activation energy and structural viscosity index（/kr/） of the solution all changed and the viscosity decreased while elevating the temperature, sodium alginate B bad lower/kr/and better spinnability as compared with sodium alginate A; and the alginate fiber had favorable thermal stability and hygroscopicity due to the grooves on the fiber surface.
出处
《合成纤维工业》
CAS
北大核心
2013年第1期28-31,共4页
China Synthetic Fiber Industry
基金
辽宁省教育厅一般项目资助(LR2012017)
纤维材料改性国家重点实验室资助课题(v201106)
关键词
海藻酸钠
流变性
黏度
热性能
sodium alginate
rheologieal behavior
viscosity
thermal property
