Method of preparing shape-reconfigurable micropatterned polymer haptic material using electric field technique
AssigneeKorea Advanced Institute of Science and Technology
InventorsDong Ki Yoon, Ra You, Changjae Lee
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Abstract
The present invention relates to a method of preparing a shape-reconfigurable micropatterned polymer haptic material using an electric field technique, and more particularly, to a method of preparing a shape-reconfigurable micro-patterned polymer thin film and a haptic material by controlling the orientation of a liquid-crystalline organic polymer using an electric field control system and inducing the generation of defect structures having a regular microstructure array in a polymer film.
Claims17
A method of preparing a shape-reconfigurable micropatterned polymer thin film, the method comprising:
- (a) forming a polymer alignment layer on each of two patterned electrode substrates;
- (b) fabricating a sandwich electrode cell by cross-assembling the two patterned electrode substrates on which the polymer alignment layer is formed at regular intervals;
- (c) injecting a liquid-crystalline organic monomer mixture between the two substrates of the sandwich electrode cell;
- and
- (d) producing a micropatterned polymer thin film by performing photocuring of the mixture in a state in which an electric field is applied to the sandwich electrode cells containing the liquid-crystalline organic monomer mixture therein.
A shape-reconfigurable micropatterned polymer thin film in which −1 topological defects are formed in crossed electrodes, +1 topological defects are formed between vertical electrode and horizontal electrode, −1 topological defects are formed at the diagonal centers of the electrodes, and surface depression deformations around the topological defects increase to 5 to 800 nm with increasing external temperature, so that a change in the roughness or frictional force of the surface of the polymer thin film is induced.
A shape-reconfigurable micropatterned polymer haptic material in which −1 topological defects are formed in crossed electrodes, +1 topological defects are formed between vertical electrode and horizontal electrode, −1 topological defects are formed at the diagonal centers of the electrodes, and surface depression deformations around the topological defects increase to 5 to 800 nm with increasing external temperature, so that a change in the roughness or frictional force of the surface of the polymer thin film is induced, wherein liquid-crystalline organic polymer is composed of polymer of 4-(3-acryloyloxypropyloxy)-benzoic acid 2-methyl-1,4-phenylene ester and 4-methoxybenzoic acid 4-(6-acryloyloxy-hexyloxy)phenyl ester.
Dependencies are inferred from the claim text.