title: Fluorinated hyperbranched polyurethane electrospun nanofibrous membrane: fluorine-enriching surface and superhydrophobic state with high adhesion to water.
abstract: 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.
authors.affiliation: College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
authors.forename: Fei
authors.initials: F
authors.lastname: Zheng
authors.affiliation: College of Chemistry, Central China Normal University, Wuhan 430079, PR China. Electronic address: denght@mail.ccnu.edu.cn.
authors.forename: Hongtao
authors.initials: H
authors.lastname: Deng
authors.affiliation: College of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, PR China.
authors.forename: Xinjun
authors.initials: X
authors.lastname: Zhao
authors.affiliation: College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
authors.forename: Xia
authors.initials: X
authors.lastname: Li
authors.affiliation: College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
authors.forename: Can
authors.initials: C
authors.lastname: Yang
authors.affiliation: College of Chemistry, Central China Normal University, Wuhan 430079, PR China.
authors.forename: Yunyan
authors.initials: Y
authors.lastname: Yang
authors.affiliation: College of Chemistry, Central China Normal University, Wuhan 430079, PR China. Electronic address: adzhang@mail.ccnu.edu.cn.
authors.forename: Aidong
authors.initials: A
authors.lastname: Zhang
mesh_terms: D005461:Fluorine / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008855:Microscopy, Electron, Scanning; D057139:Nanofibers; D011140:Polyurethanes / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014867:Water / Q000737:chemistry
chemical_list: D011140:Polyurethanes; D014867:Water; D005461:Fluorine
keywords: High adhesion; Nanofibrous membrane; Polyurethane; Superhydrophobicity