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Morphological analysis of crease patterns formed on surface‐attached hydrogel with a gradient in thickness
Author(s) -
Kim Jungwook
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40482
Subject(s) - morphology (biology) , swelling , polyelectrolyte , exponent , surface tension , materials science , similarity (geometry) , surface (topology) , osmotic pressure , power law , self healing hydrogels , polymer chemistry , composite material , chemistry , polymer , geometry , thermodynamics , mathematics , physics , biology , linguistics , philosophy , genetics , image (mathematics) , biochemistry , artificial intelligence , computer science , statistics
The morphology of crease pattern formed on the surface‐attached hydrogel with a gradient in thickness is analyzed. We label the hydrogel surface at the creased state with fluorescent polyelectrolyte, which enables us to visualize surface morphology of creases using the fluorescent microscopy. Various morphological features of crease patterns are analyzed at different thickness of hydrogel, or characteristic spacing of creases λ c , max , to examine the self‐similarity of crease morphology at different length scales. Some morphological features show no λ c , max dependence, implying the self‐similarity, while others show weak λ c ,max dependence with positive values of the exponent of power law fit for the plots. We infer that such nonself‐similarity is originated from the variations in the kinetics of swelling and creasing of hydrogel, the effect of surface tension, or the reduction in the osmotic pressure occurred during the polyelectrolyte labeling step at different λ c ,max . © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40482.