Programmable Liquid Crystal Defect Arrays via Electric Field Modulation for Mechanically Functional Liquid Crystal Networks

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The arrangement of mesogenic units determines mechanical response of the liquid crystal polymer network (LCN) film to heat. Here, we show an interesting approach to programming three-dimensional patterns of the LCN films with periodic topological defects generated by applying an electric field. The mechanical properties of three representative patterned LCN films were investigated in terms of the arrangement of mesogenic units through tensile testing. Remarkably, it was determined that LCN films showed enhanced toughness and ductility as defects increased in a given area, which is related to the elastic modulus mismatch that mitigates crack propagation. Our platform can also be used to modulate the frictional force of the patterned LCN films by varying the temperature, which can provide insight into the multiplex mechanical properties of LCN films.
Publisher
AMER CHEMICAL SOC
Issue Date
2021-08
Language
English
Article Type
Article
Citation

ACS APPLIED MATERIALS & INTERFACES, v.13, no.30, pp.36253 - 36261

ISSN
1944-8244
DOI
10.1021/acsami.1c04999
URI
http://hdl.handle.net/10203/287236
Appears in Collection
ME-Journal Papers(저널논문)CH-Journal Papers(저널논문)
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