Abstract:

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 desolved have been investigated respectively. The experimental results showed that Non-Newtonian index of the brown cotton / LiCl/DMAc solution is the highest, closest 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 200nm can be obtained.