静电纺丝
壳聚糖
材料科学
环氧乙烷
扫描电子显微镜
化学工程
超细纤维
差示扫描量热法
傅里叶变换红外光谱
醋酸
高分子化学
水溶液
聚合物
核化学
复合材料
化学
共聚物
有机化学
工程类
物理
热力学
作者
Bin Duan,Cunhai Dong,Xiaoyan Yuan,Kangde Yao
标识
DOI:10.1163/156856204774196171
摘要
Electrospinning of chitosan solutions with poly(ethylene oxide) (PEO) in an aqueous solution of 2 wt% acetic acid was studied. The properties of the chitosan/PEO solutions, including conductivity, surface tension and viscosity, were measured. Morphology of the electrospun chitosan/PEO was observed by using scanning electron micrographs. Results showed that the ultrafine fibers could be generated after addition of PEO in 2:1 or 1:1 mass ratios of chitosan to PEO from 4-6 wt% chitosan/PEO solutions at 15 kV voltage, 20 cm capillary-collector distance and flow rate 0.1 ml/h. During electrospinning of the chitosan/PEO solutions, ultrafine fibers with diameters from 80 nm to 180 nm were obtained, while microfibers with visually thicker diameters could be formed as well. Results of X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and differential scanning calorimeter exhibited the larger electrospun microfibers were almost entirely made from PEO, while the electrospun ultrafine fibers mainly contained chitosan.
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