Journal
APPLIED SURFACE SCIENCE
Volume 258, Issue 18, Pages 6969-6976Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2012.03.145
Keywords
Thermoplastic poly(vinyl alcohol); Saponite; Air dielectric barrier discharges plasma; Surface-initiated atom transfer radical polymerization; Water resistance
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Funding
- National Science Foundation of China [50833003]
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To improve the water resistance of thermoplastic poly(vinyl alcohol)/saponite nanocomposites (TPVA), a simple two-step method was developed for the covalent immobilization of atom transfer radical polymerization (ATRP) initiators on the TPVA surfaces enhanced by air dielectric barrier discharges (DBD) plasma treatment, and hydrophobic poly(methyl methacrylate) (PMMA) brushes were then grafted onto the surface of TPVA via surface-initiated atom transfer radical polymerization (SI-ATRP). The chemical composition, morphology and hydrophobicity of the modified TPVA surfaces were characterized by Xray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), respectively. The water resistance of the surface-functionalized PMMA was evaluated by the contact angle and water adsorption method. It was shown that air DBD plasma treatment activated the TPVA surface and accelerated the immobilization of ATRP initiator on the TPVA surface. Compared with TPVA control, TPVA modified by SI-ATRP can be grafted well-defined and covalently tethered network PMMA brushes onto the surface and the hydrophobicity of TPVA were significantly enhanced. (C) 2012 Elsevier B. V. All rights reserved.
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