期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 348, 期 1-3, 页码 151-156出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2009.07.006
关键词
Polymerizable emulsifier; Seed emulsion polymerization; Emulsifier-free fluorinated polyarcylate emulsion
资金
- National Natural Science Foundation of China [20476035, 20846003, 20876065]
An emulsifier-free fluorinated polyarcylate emulsion was synthesized by a seed emulsion polymerization method from methyl methacrylate (MMA), butyl acrylate (BA) and hexafluorobutyl methacrylate (HFMA) in the presence of a polymerizable emulsifier-ammonium allyloxtmethylate nonylphenol ethoxylates Sulfate (DNS-86). Influences of the DNS-86 level on electrolyte stability of the emulsifier-free emulsion were discussed. In addition, the emulsion and the films were characterized by Fourier transformed infrared (FT-IR) spectrometry, nuclear magnetic resonance (H-1 NMR) spectrometry, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC), thermogravimetry (TG), and contact angle (CA) analysis, respectively. The FT-IR spectra and H-1 NMR spectrum showed that HFMA was effectively involved in the emulsion copolymerization and monomers formed the fluorine-containing acrylate copolymer. The resulted emulsion particles had a core-shell structure and a narrow particle size distribution. XPS and CA analysis revealed that a gradient concentration of fluorine existed along the depth profile of the fluorine-containing emulsion Him. One side of the film was richer in fluorine and more hydrophobic than the other side. The film formed from the fluorine-containing emulsion showed higher thermal stability than that of the fluorine-free emulsion. (C) 2009 Elsevier B.V. All rights reserved.
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