报告主题: Preparation and characterization of keratin-based transparent nanofibers for organic electronics
报告时间: 2018.5.20 15:15-16:00
报告人及简介: Dr. Jun Youb Lee received his B.S degree in Textile Engineering from Chonbuk National University in 1993. He obtained his M.S. degree from Hanji Culture Industry Division in Jeonju University in 2009. He received his PhD. Degree in Textile Engineering from Chonbuk National University. Currently he is the CEO of O-Sung Co., Ltd.
报告大纲: Electrospinning is a well-known and versatile technique to fabricate micro and nanoﬁbers (NFs) with high porosity and many environmentally friendly applications such as biomedical and filter industry. Here the fabrication of wool hair-based keratin/poly (vinyl alcohol) (PVA) (WH/PVA) NFs by electrospinning technique was presented. It has been successfully prepared the environmentally friendly NF mats made by WH/PVA composite NFs exhibiting high optical transmittance by using simple and versatile dip and dry process. Keratin was extracted from discarded WH and waste wool by sulphitolysis process and glyoxal solution was used as crosslinking agent in the system. Because of its low molecular weight (65-11 kDa) and poor mechanical properties, regenerated keratin is so difficult to handle that PVA was blended with keratin aqueous solution. More interestingly, the high optical transmittance (~88% at a wave length of 550 nm) of the NF mats was achieved by simply dipping it in water without adding any additive. Furthermore, the tensile strength of the transparent composite NFs were also found to be increased (30 MPa) as compared to the PVA NFs (5.9 MPa).