期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 435, 期 -, 页码 75-82出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2014.08.017
关键词
Fluoropolymer; Hybrid nanocomposite; Superhydrophobic; Oleophobic
资金
- National Basic Research Program of China (973 Program) [2012CB720904]
- National Natural Science Foundation of China (NSFC) [51373133, 51073126]
- State Administration of Cultural Heritage [20110128]
- Fundamental Research Funds for the Central Universities
The fluoropolymer-SiO2 hybrid nanocomposite consisting of core-corona fluoropolymer-grafted SiO2 nanoparticle (NP) and poly(dodecafluoroheptyl methacrylate) (PDFHM) was obtained by radical solution polymerization of the vinyl trimethoxy silane (VTMS)-treated SiO2 NP with DFHM in this work. In H2O/ tetrahydrofuran (THF) solution, PDFHM self-assembles into dendritic micelle and the increase in H2O volume is favorable for fluoropolymer-grafted SiO2 NPs to create dense fluoropolymer corona layer. It also shows that the addition of H2O to the THF suspension of fluoropolymer-SiO2 nanocomposite could cause a transfer for surface morphology of cast film from smooth film-covered aggregation to bare-exposed flaky aggregation and microsphere aggregation, which results in an increase in surface RMS roughness of cast film and induces a superhydrophobicity. Oleophobicity of cast film can be improved by thermal annealing, because strong surface self-segregation of PDFHM chains during thermal annealing process arouses a marked increase in surface fluorine content. (C) 2014 Elsevier Inc. All rights reserved.
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