119th General Meeting of the KCS

Type Oral Presentation
Area Oral Presentation for Young Polymer Scientists
Room No. 405호
Time THU 09:45-:
Code POLY.O-4
Subject Fabrication of fibrillary hydrogel via partial crystallization and its application for three-dimensional neuronal network construction
Authors 김동윤, 윤명한*
GIST 신소재공학부, Korea
Abstract Dissolution of polymer at solvent/polymer interface is of interest not only for fundamental science but also in the field of industry. Depending on solvent condition, the solvent/polymer interface is reached into three different equilibrium states: first, complete dissolution of the polymer in which the individual polymers are dislocated by the solvent. Second, not dissolved polymer, having an abrupt interface with respect to the solvent. Third, gel state in which the polymer is swelled with solvent. Herein, by using solvent/dissolvent (water/ethanol) mixture and electrospun poly(vinyl alcohol) (PVA), dynamic polymer dissolution process at the polymer interface is controlled and enable to modulate polymer crystallization degree. The polymer density and microstructure of hydrogel, which is measured by optical tomography and atomic force microscopy, respectively, reveal partially crystallized hydrogel structure. The resultant PVA fiber hydrogel exhibit preserved original fiber structure and decent optical transparency. Finally, the fibrillary hydrogel is used as a scaffold for artificial three-dimensional neuronal network construction.
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