%0 Journal Article
%T Fluorinated hyperbranched polyurethane electrospun nanofibrous membrane: fluorine-enriching surface and superhydrophobic state with high adhesion to water.
%A Zheng F
%A Deng H
%A Zhao X
%A Li X
%A Yang C
%A Yang Y
%A Zhang A
%J J Colloid Interface Sci
%V 421
%N 0
%D May 2014 1
%M 24594031
%F 9.965
%R 10.1016/j.jcis.2014.01.009
%X The fluorination of hyperbranched polyurethane (HPU) was achieved by atom transfer radical grafting polymerization (ATRgP) of dodecafluoroheptyl methacrylate that was initiated from 2-bromoisobutyryl bromide-modified end groups of HPU. The nanofibrous membrane of fluorinated HPU was prepared by electrospinning. The structure of fluorinated HPU was characterized by Fourier-transform infrared spectroscopy (FTIR) and (1)H nuclear magnetic resonance spectrum (1H NMR). The surface of nanofibrous membrane was investigated with scanning electron microscope (SEM), atomic force microscope (AFM), X-ray photoelectron spectroscopy (XPS) and water contact angle (WCA) analysis, respectively. The results suggested that compared with the reported linear fluorine-containing polyurethane materials, rather high fluorine content up to 29.14% was achieved on the surface of fluorinated HPU nanofibrous membrane. Meanwhile, a superhydrophobic surface (WCA 159.7°) with high adhesion to water was successfully fabricated via a convenient electrospinning process. The prepared material is promising for the application in microfluidic devices.