Hot Topics
Vol. 61, No. 4, April (2012)
High-Functionability of Biobased and Biodegradable Porous Fibers
Tadahisa IWATA Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo |
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pH-Responsive Aqueous Foams Stabilized by Hairy Latex Particles
Syuji FUJII and Yoshinobu NAKAMURA Department of Applied Chemistry, Osaka Institute of Technology |
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A New Class of Living Radical Polymerization with Organic Amines as Catalysts
Atsushi GOTO Institute for Chemical Research, Kyoto University |
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Hybrid Particles Decorated with Polymer Brush
Kohji OHNO Institute for Chemical Research, Kyoto University |
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Transfer of Stir-Induced Optical Activity Occurred from Ionic Oligomer Solution onto a Congo Red Dye
Kunihiko OKANO Department of Pure and Applied Chemistry, Tokyo University of Science |
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Control of Interface Structure and Properties Using Reversibly Cross-linkable Polymers
Eriko SATO Department of Applied Chemistry and Bioengineering, Graduate School of Engineering, Osaka City University |
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Wettability is one of the most important interface properties and affected by both surface free energy and surface topography of the materials. A new concept of controlling wettability was investigated using reversibly cross-linkable polymer and their volume changes. Polymers having a coumarin moiety in the side-chain are cross-linked and de-cross-linked by photochemical dimerization and reverse dimerization of the coumarin moiety, respectively. Volume shrinkage was accompanied by cross-linking when intermolecular dimerization occurs. Photo-patterning of the thin films of shrinkable polymers resulted in an indented patterned surface having different surface free energies. The indented patterned surface resulted in larger increase in the contact angle (CA) of water than the flat and smooth surface after cross-linking due to the synergy effect of the changes in surface topography and free energy.
Polymer Preprints, Japan 2011, 60, 105.
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