作者：Mufang Li a, Dong Wanga,?, Ru Xiao b, Gang Sun b,c, Qinghua Zhao a, Haiying Li
关键字：PTT ，Nanofiber ，Nanofiber membrane ，Microfiltration
论文来源：期刊
发表时间：2013年
A novel high flux poly(trimethylene terephthalate) (PTT) nanofiber membrane for microfiltration media
was prepared and characterized in this study. The PTT nanofibers for the membrane preparation were
fabricated based on a high throughput, cost effective and environmental friendly method developed by
us. The PTT nanofiber membranes were then prepared by a wet-laid process. To enhance the mechanical
properties of fabricated PTT nanofiber membrane, two strategies were employed. The structures of PTT
nanofiber membrane were compacted by making PTT nanofibers shrink together under heat. The other
one is to facilitate the formation of locally physical cross-linking points by blending PP nanofibers having
lower softening points into PTT nanofiber membranes and the following heat-treatment. The properties
of the original nanofiber membrane and two modified nanofiber membranes, including morphology,
apparent density, porosity, contact-angle, pore size distribution, water flux and filtration efficiency, were
thoroughly investigated. The rejection rates of the prepared nanofiber membranes to TiO2 suspensions
with the average diameter of 100 nm were above 99.6%. The results indicated that the PTT nanofiber
membranes prepared by this novel method have great potential for the application of high flux microfiltration
media.