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Geometry Control of Wrinkle Structures Aligned on Hydrogel Surfaces
Masatoshi Kato1, Yuka Kashihara1, Taka-Aki Asoh1
1Department of Applied Chemistry, Graduate School of Engineering , Osaka University , 2-1 Yamadaoka , Suita , Osaka 565-0871 , Japan.
Langmuir : the ACS Journal of Surfaces and Colloids
|January 31, 2020
Summary
Researchers developed a new method to create aligned wrinkles on hydrogels using an electrophoretic technique. This controllable surface geometry fabrication method allows for tunable wrinkle structures and thermoresponsive transformations.
Area of Science:
- Materials Science
- Surface Chemistry
- Polymer Science
Background:
- Surface geometries in nature, like wrinkles, serve crucial functions.
- Fabrication and control of surface geometry are key for active interfaces.
- Understanding these geometries aids in controlling environmental interactions.
Purpose of the Study:
- To develop a novel method for fabricating aligned wrinkles on hydrogels.
- To control wrinkle geometry based on substrate properties and external stimuli.
- To create thermoresponsive wrinkles with reversible shape transformations.
Main Methods:
- Fabrication of aligned wrinkles via electrophoretic formation of a polyion complex layer on stretched hydrogels.
- Control of wrinkle geometry by adjusting the stretching ratio and Young's modulus of hydrogels.
- Creation of hierarchical wrinkle structures and thermoresponsive wrinkles using functionalized hydrogels.
Main Results:
- Successfully fabricated aligned wrinkles on hydrogel surfaces in aqueous conditions.
- Demonstrated control over wrinkle geometry influenced by hydrogel stretching and modulus.
- Achieved hierarchical wrinkle structures and reversible transformations in thermoresponsive wrinkles.
Conclusions:
- The electrophoretic method offers a new approach for wrinkle formation, transferring substrate anisotropy to the wrinkle structure.
- This technique enables the creation of tunable and functional surface geometries for advanced applications.
- Thermoresponsive wrinkles were successfully fabricated, showcasing reversible shape-changing capabilities.
