99. Preparation and Properties Research on Electrostatic Spinning Acetate/Chitosan Composite Fiber

In this paper, composite fiber membranes of cellulose acetate/chistosan (CA/CS) were prepared by electrospinning using two different injection methods involving co-injection and two-step injection. The antibacterial and micro-morphology properties of the CA/CS composite fiber membranes were also investigated. The results show that the optimum conditions of co-injection method were as follows: voltage 13 kV, flow rate 1.0 ml/h, and receiving distance 10 cm. For the two-step injection method, the voltage of 15 kV, flow rate of 1.0 ml/h, and receiving distance of 10 cm were adopted to prepare cellulose acetate membrane at first, and then, the chitosan liquid was injected into the cellulose acetate membrane under the condition of 13 kV voltage and 0.5 ml/h flow rate. The CA/CS composite fiber membrane prepared by the co-injection method had a better fibrous structure arrangement, smooth fiber surface, and uniform thickness, but the poor antibacterial effect was also indicated. However, the two-step injection method has excellent antibacterial effects. When the CS/PEO ratio is 9:1, composite fiber membrane has the best antibacterial property, but the fiber surface is not smooth enough.