Journal
APPLIED SURFACE SCIENCE
Volume 307, Issue -, Pages 566-575Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.04.074
Keywords
transfer radical polymerization; (ATRP) Block copolymers; Electronsp inning; Fluorosilicones Morphology; Superhydrophobicity
Categories
Funding
- National Natural Science Foundation of China (NSFC) [21276243]
- Program for Zhejiang Leading Team of Science and Technology Innovation [2010R50038]
- Zhejiang Provincial Top Key Academic Discipline of Chemical Engineering and Technology
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A series of well-defined poly[methyl(3,3,3-trifluoropropyl)siloxane]-b-poly(methyl methacrylate) (PMTFPS-b-PMMA) diblock copolymers with low content of PMTFPS were synthesized by atom transfer radical polymerization (ATRP) of MMA from PMTFPS macroinitiators (PMTFPS-Br). The polymerization result reveals that the ATRP of MMA from PMTFPS-Br is fist-order with respect to MMA under different polymerization conditions, demonstrating a typical characteristic of living polymerization. The results also show that PMTFPS-b-PMMA diblock copolymers can exhibit a total surface tension ( ys) varying from 25.28 mN/m to 21.87 mN/m with the change of PMTFPS contents from 2.6 wt% to 22.2 wt%. Moreover, the water contact angles of electrospun PMTFPS-b-PMMA surfaces could be higher than 150 with water roll-off angles less than 10, which denotes a superhydrophobic property. However, the electronspinning conditions, especially the concentration of spinning solution, would have important effect on the surface morphology, surface composition and wetting behavior of electrospun films. It was found that bead-free fibers with uniform diameter as well as good superhydrophobic property could be prepared on condition that the polymer concentration of spinning solution was as high as 32 wt% in the mixed solvent of DMF and THF. 2014 Elsevier B.V. All rights reserved.
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