Fabrication of PA 4,6 Nanofibers through Electrospinning Technique

• Main Authors: Sheng Che Feng, 馮聖哲
• Other Authors: F. C. Chiu
• Format: Others
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/94950632515415885055

碩士 === 長庚大學 === 化工與材料工程學系 === 98 === In this study, electrospinning technique was used to fabricate polyamide 4,6 (PA 4,6) nanofibers. Functionalized multi-walled carbon nanotubes (MWNTs) served as fillers for the nanofibers. The Raman spectroscopy, FTIR spectroscopy and TGA results confirm that the MWNTs were successfully functionalized through the treatment of inorganic acids. The nanofibers were electrospun from solutions of PA 4,6/MWNTs in formic acid with different concentrations. The solution concentration and spinning voltage played important roles on the morphology of spun fibers. FESEM results show that beaded fibers were developed from a solution of low concentration (i.e., 10 wt%).When the solution concentration arose to 20 wt%, smooth nanofibers were obtained. TEM results illustrate that MWNTs were embedded within the nanofibers and oriented along the fiber axis direction. The electrospun nanofibers exhibited a new PA 4,6 crystal form instead of the commonly developed α form crystals as revealed by XRD data. More complicated DSC melting behavior was observed for the nanofibers compared with that of cast PA 4,6 film. TGA results show that the thermal degradation temperature of nanofibers was higher than that of cast film.