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中文摘要：
为进行天然彩色棉纤维素的静电纺丝,研究了天然彩色棉和白棉纤维素LiCl/DMAc（N,N-二甲基乙酰胺）溶液的流变性能。结果表明：棕棉纤维素LiCl/DMAc溶液的非牛顿指数较高,最接近1;3种纤维素溶液的非牛顿指数随溶液温度的升高而增高,棕棉、绿棉纤维素LiCl/DMAc溶液分别在30、35℃以上具有较稳定的流变特性;3种纤维素溶液的非牛顿指数随溶液质量分数的增加而减小,棕棉、绿棉纤维素溶液质量分数在1.2%、1.1%以下均具有较稳定的非牛顿指数。通过棕棉纤维素LiCl/DMAc溶液的静电纺丝实验,证实了棕棉纤维素质量分数必须在1.2%以下才可能形成稳定的射流,制得直径为200 nm以下的静电纺纤维。
英文摘要：
For electrospinning of naturally colored cotton cellulose,rheological properties of LiCl /DMAc（Dimethyl acetamide） solutions with naturally colored cotton fibers,including the green and brown,and white cotton dissolved have been investigated respectively.The experimental results showed that Non-Newtonian index of the brown cotton /LiCl /DMAc solution is the highest,close to 1,and the Non-Newtonian indexes of all three fiber /LiCl /DMAc solutions increase with the increase of solution temperature and decrease with the increase of mass concentration.The rheological property remains relatively stable when the solution temperature is above 30 ℃ for the brown,and above 35℃ for the green.When the mass concentration is below 1.2% for the brown and 1.1% for the green,the solutions have stable Non-Newtonian index.The electrospinning experiment of the brown cotton demonstrated that a stable jet can be formed only when the mass concentration is below 1.2%,and electrospun nanofibers of a diameter less than 200 nm can be obtained.
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