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Formation of Polysaccharide Membranes by Splitting of Evaporative Air–LC Interface
Author(s) -
Okeyoshi Kosuke,
Joshi Gargi,
Okajima Maiko K.,
Kaneko Tatsuo
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201701219
Subject(s) - materials science , polymer , membrane , evaporation , capillary action , non equilibrium thermodynamics , deposition (geology) , chemical physics , aqueous solution , chemical engineering , meniscus , nanotechnology , thermodynamics , composite material , optics , chemistry , paleontology , biochemistry , physics , incidence (geometry) , sediment , biology , engineering
Abstract Self‐assembly methods for colloidal crystals are widely developed by using the evaporative interface and capillary forces. Recently, a distinct phenomenon is discovered of macrospace partitioning by a polysaccharide membrane formed in a limited space by drying its aqueous liquid crystalline solution. Differing from typical fingering patterns, here, the viscous solution is in a nonequilibrium process between the polymer deposition and hydration during drying. By drying in limited space with a narrow gap, the nonequilibrium state causes accumulation of small depositions at several specific points and the deposited polymer bridging the substrates. Here, the split meniscus should make the area of the evaporative interface larger. To describe the correlation between the interfacial curve and the partitioning, the geometric effects of the evaporation front are discussed experimentally and numerically. By controlling the evaporation front three dimensionally, the necessary conditions for the vertical membrane formation are verified multilaterally. In future, this approach will help deposition control of not only the polysaccharides but also other biopolymers exhibiting microrod assembly.