Spatiotemporal Control of Self-oscillating Gel by Uniformly Aligned Inorganic Nano
Sheets
- Title
- Spatiotemporal Control of Self-oscillating Gel by Uniformly Aligned Inorganic Nano
Sheets
- Authors
- KIM, YOUN SOO
- Date Issued
- 2018-12-06
- Publisher
- The Society of Polymer Science
- Abstract
- A novel “self-oscillating” gel that exhibits an autonomous mechanical
swelling–deswelling oscillation without any on–off switching of external stimuli has been
developed since 1996. The basic chemical structure of the self-oscillating polymer is a
copolymer of N-isopropylacrylamide (NIPAAm) and Ru(bpy)3 as a catalyst for the
Belousov–Zhabotinsky (BZ) reaction. In response to the redox change of Ru(bpy)3 units,
hydrophilicity and LCST of gel matrices change, which causes the swelling and deswelling of
the gel networks. Unilamellar titania nanosheet (TiNS) is quite attractive, owing to its highly
anisotropic shape and unique magnetic properties, where TiNSs in an aqueous dispersion
magnetically align cofacially. Through in-situ polymerization, the aligned structure of TiNSs
can be chemically locked in the hydrogel network. Based on this strategy, we fabricated an
anisotropic self-oscillating hydrogel by hybridization of poly(NIPAAm) and Ru(bpy)3 units
with uniformly aligned TiNSs. The as-prepared hydrogel showed autonomous
swelling/deswelling behavior driven by BZ reaction, in a highly anisotropic manner.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/102453
- Article Type
- Conference
- Citation
- The 12th SPSJ International Polymer Confer, 2018-12-06
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