Hybrid Carbon Silica Nanofibers through Sol鈥揋el Electrospinning

详细信息    查看全文

• 作者：Tahira Pirzada ; Sara A. Arvidson ; Carl D. Saquing ; S. Sakhawat Shah ; Saad A. Khan
• 刊名：Langmuir
• 出版年：2014
• 出版时间：December 30, 2014
• 年：2014
• 卷：30
• 期：51
• 页码：15504-15513
• 全文大小：627K
• ISSN：1520-5827

文摘

A controlled sol鈥揼el synthesis incorporated with electrospinning is employed to produce polyacrylonitrile鈥搒ilica (PAN鈥搒ilica) fibers. Hybrid fibers are obtained with varying amounts of silica precursor (TEOS in DMF catalyzed by HCl) and PAN. Solution viscosity, conductivity, and surface tension are found to relate strongly to the electrospinnability of PAN鈥搒ilica solutions. TGA and DSC analyses of the hybrids indicate strong intermolecular interactions, possibly between the 鈭扥H group of silica and 鈭扖N of PAN. Thermal stabilization of the hybrids at 280 掳C followed by carbonization at 800 掳C transforms fibers to carbon鈥搒ilica hybrid nanofibers with smooth morphology and diameter ranging from 400 to 700 nm. FTIR analysis of the fibers confirms the presence of silica in the as-spun as well as the carbonized material, where the extent of carbonization is also estimated by confirming the presence of 鈭扖鈺怌 and 鈭扖鈺怬 peaks in the carbonized hybrids. The graphitic character of the carbon鈥搒ilica fibers is confirmed through Raman studies, and the role of silica in the disorder of the carbon structure is discussed.