摘要
为探究纤维素溶液流变性能对其静电纺丝可纺性的影响,研究了纤维素/氯化锂(LiCl)/N,N-二甲基乙酰胺(DMAc)溶液的稳态流变性能和动态流变性能,并在此基础上进行静电纺丝。结果表明:纤维素/LiCl/DMAc溶液为假塑性流体,溶液的表观黏度、稠度系数、结构黏度指数均随着温度的升高而减小,随着纤维素质量分数的增加而增大,而非牛顿指数的变化规律则相反;20~60℃温度下,质量分数为2.5%和3.0%的纤维素/LiCl/DMAc溶液的非牛顿指数更接近1,具有较稳定的流变性能,且结构黏度指数较小,更易进行纺丝操作;室温下,质量分数为3.0%的纤维素/LiCl/DMAc溶液更适宜进行静电纺丝。
In order to investigate the effect of rheological properties of cellulose solution on the spinnability of electrospinning,the steady and dynamic rheological properties of cellulose/LiCl/N,N-dimethylacetamide(DMAc)solution were studied,and electrospinning was carried out on this basis.It was found that the cellulose/LiCl/DMAc solutions were pseudoplastic fluid.The research results showed that the apparent viscosity,consistency coefficient and structural viscosity index of the solution decrease with the increase of temperature and increase with the increase of cellulose mass fraction,while the variations of non-Newtonian index were opposite.The non-Newtonian indices of the 2.5%and 3.0%cellulose/LiCl/DMAc solutions were closer to 1 at 20-60℃,meaning that the solutions have stable rheological properties.The structural viscosity indices of the 2.5%and 3.0%cellulose/LiCl/DMAc solutions were smaller,making them easier to spin,with 3.0%cellulose/LiCl/DMAc solution the optimal for electrospinning at room temperature.
作者
余美琼
袁红梅
陈礼辉
YU Meiqiong;YUAN Hongmei;CHEN Lihui(College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350108, China;School of Ocean Science and Biochemistry Engineering, Fujian Polytechnic Normal University, Fuqing, Fujian 350300, China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2021年第5期23-30,共8页
Journal of Textile Research
基金
国家自然科学基金项目(31971612)
福建农林大学科技发展基金项目(CXZX2018007,CXZX2017040)。
