A Simple Method for Controllable Preparation of Polymer Nanotubes via a Single Capillary Electrospinning

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• 作者：Xing H. Li ; Chang L. Shao ; Yi C. Liu
• 刊名：Langmuir
• 出版年：2007
• 出版时间：October 23, 2007
• 年：2007
• 卷：23
• 期：22
• 页码：10920 - 10923
• 全文大小：397K
• 年卷期：v.23,no.22(October 23, 2007)
• ISSN：1520-5827

文摘

Polymer nanotubes have been successfully electrospun via a single capillary spinneret instead of coaxial electrospinning.By altering the volume of ethanol under a fixed amount of poly(vinyl pyrrolidone) (PVP) and tetraethyl orthosilicate(TEOS) in the precursor, the nanotubes could be controllably produced for a proper concentration of PVP solution.Further investigation showed that the diameters of nanotubes, the thicknesses of nanotube walls, and the ratios of thethickness of the nanotube wall to the nanotube diameter (RTNWND) could be controlled by altering the amount ofTEOS in the precursor. With increasing the ratios of TEOS to PVP solution, the nanotube diameters were increasedand the nanotube walls were decreased. Thus, the RTNWND were decreased. The applied voltages also have an effecton the nanotube diameter and the thickness of the nanotube wall, but little on the RTNWND. The effects of ethanoland TEOS on evaporation and phase separation processes were discussed.