Preparation of Gradient Polyacrylate Brushes in Microchannels
- Authors
- Lee, Seongyeol; Youm, Sang Gil; Song, Yeari; Yi, Whikum; Sohn, Daewon
- Issue Date
- May-2012
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Polymer Brushes; Microchannels; PHEMA; ATRP
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.12, no.5, pp.4185 - 4189
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 12
- Number
- 5
- Start Page
- 4185
- End Page
- 4189
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/165717
- DOI
- 10.1166/jnn.2012.5906
- ISSN
- 1533-4880
- Abstract
- Gradient poly(2-hydroxyethyl methacrylate) brushes were synthesized by surface-initiated atom transfer radical polymerization (ATRP) confined within a microfluidic system on a silicon wafer. For ATRP, surface initiator, 11-((2-bromo, 2-methyl) propionyloxy) undecyltrichlorosilane (BUC), was synthesized, and allowed to self-assemble in a monolayer on the Si wafer, as analyzed by XPS to confirm the presence of an ester group of BUC. A solution containing 2-hydroxyethylmethacrylate, Cu catalyst, and bipyridin was allowed to flow in a microchannel and polymerize, resulting in the brushes with a gradient of thickness on the Si wafer. Using ellipsometry and ATR-IR, we verified the gradients of well established brushes on the Si wafer. AFM and contact angle data showed that wettability of the brushes did not exhibit a linear relationship with hydrophilicity.
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