摘要
以乙酸为溶剂溶解壳聚糖,与适量PVA(聚乙烯醇)混合制得复合纺丝液,测量复合溶液的表面张力、电导率、黏度等参数,用来表征溶液性能。通过静电纺丝法得到纳米纤维,采用扫描电子显微镜观察纤维的表面形貌。结果表明:未添加PVA的壳聚糖乙酸体系静电纺丝困难,纺丝过程中串珠较多。将配制的壳聚糖质量分数为1%的壳聚糖/乙酸溶液与10%PVA水溶液分别以5∶5、3∶7的比例混合,在纺丝电压20 kV,溶液流速0.5 mL/h,接收距离20 cm的处理条件下,可获得直径分别为61、118 nm的纳米纤维网。
Chitosan is dissolved with acetic acid as a solvent, and then mixed with an appropriate amount of polyvinyl alcohol to prepare a composite spinning solution. The surface tension, conductivity, viscosity and other parameters of the composite solution are measured to characterize the solution properties. The nanofibers are made by electrospinning method, and the surface morphology of the electrospinning fibers is observed with scanning electron microscopy. The resuhs show that electrospinning of chitosan acetate system is difficult without adding PVA. The optimum conditions to obtain a uniform nanofibers are a spinning solution of 50% acetic acid and 1% chitosan dissolved with 10% aqueous polyvinyl alcohol solution with mixing ratio of 5 ： 5 and 3 ： 7 mixed, voltage 20 kV, solution flow at the rate of 0.5 mL/h, and received distance 20 cm, and a more uniform diameter of 61 nm and 118 nIn nanofiber net can be obtained.
出处
《上海纺织科技》
北大核心
2017年第4期24-25,61,共3页
Shanghai Textile Science & Technology
基金
辽宁省高等学校杰出青年学者成长计划(LJQ2015008)
关键词
壳聚糖
乙酸
聚乙烯醇
静电纺丝
纳米纤维
chitosan
acetic acid
polyvinylalcohol
electrostatic spinning
nanofiber
