Journal of the Brazilian Chemical Society | |
Preparation of tunable wettability polymer (ionic liquid) brushes at rough substrate using surface initiated atom transfer radical polymerization | |
Wan, Fei1  MOE1  Northwest Normal University, Lanzhou, P.R. China1  Guo, Hao1  Sun, Kanjun1  Gao, Jinzhang1  Lei, Ziqiang1  Yang, Wu1  Ma, Guofu1  | |
关键词: tunable wettability; polymer brushes; surface-initiated polymerization; ion exchanging; rough substrate; | |
DOI : 10.1590/S0103-50532011000300010 | |
学科分类:化学(综合) | |
来源: SciELO | |
【 摘 要 】
Using surface initiated atom transfer radical polymerization (ATRP), novel tunable wettability polymer (ionic liquid) brushes poly[2-(1-butylimidazolium-3-yl)ethyl methacrylate hexafluorophosphate] (PBIMH-PF6-) from a rough substrate modified with an initiator layer composed of 2-bromoisobutyryl bromide was prepared. Various characterization techniques including ellipsometry, static water contact angle measurements, X-ray photoelectron spectroscopy (XPS), and atomic force microscope (AFM) were used to characterize the films for each surface modification step. Kinetic studies revealed a linear increase in polymer film thickness with reaction time, indicating that chain growth from the surface was a controlled process with a "living" characteristic. Wetting measurements indicated that ion exchanging interactions can be used to switch surface characteristics from hydrophilicity to hydrophobicity in a reversible manner. Compared with the smooth surface of the flat substrate modified with the same polymer (ionic liquid) brushes, the rough substrate by chemical etching exhibited better hydrophobicity.
【 授权许可】
Unknown
【 预 览 】
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RO201912050581266ZK.pdf | 1371KB | download |