2-Dimensional colloidal micropatterning of cholesteric liquid crystal microcapsules for temperature-responsive color displays

[Display omitted] •Uniform thermochromic microcapsules consisting of a CLC core and a thin polyurethane shell were produced.•2-D patterned array of CLC microcapsules on a flexible stencil led to temperature-responsive color display.•Designated registry of RGB-colored CLC microcapsules on the stencil...

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Bibliographic Details
Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2018, 68(0), , pp.393-398
Main Authors: Lee, Woo Jin, Kim, Bohyun, Han, Sang Woo, Seo, Minjeong, Choi, Song-Ee, Yang, Hakyeong, Kim, Shin-Hyun, Jeong, Sohee, Kim, Jin Woong
Format: Article
Language:English
Subjects:
Colloidal array
Liquid crystals
Microcapsules
Microfluidics
Temperature-responsive sensor
화학공학
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Summary:[Display omitted] •Uniform thermochromic microcapsules consisting of a CLC core and a thin polyurethane shell were produced.•2-D patterned array of CLC microcapsules on a flexible stencil led to temperature-responsive color display.•Designated registry of RGB-colored CLC microcapsules on the stencil enabled development of a microwriting display technology. This work offers a promising approach for development of a temperature-responsive colorimetric display platform. For this purpose, uniform thermochromic microcapsules consisting of a cholesteric liquid crystal (CLC) core and a thin polyurethane shell layer were fabricated by conducting in-situ condensation polymerization at the interface of monodisperse CLC-in-water emulsion drops. Colloidal packing-driven microcapsule registry led to exact 2-dimensional positioning of CLC microcapsules into a holes-patterned flexible film stencil. Furthermore, we showed that the designated registry of different color types of CLC microcapsules on the stencil enabled development of a microwriting display technology capable of reversible text representation according to temperature change.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2018.08.014