|
KMID : 0525720210260020083
|
|
Journal of Chitin and Chitosan
2021 Volume.26 No. 2 p.83 ~ p.89
|
|
|
Preparation of Hydrogels Using Super-Giant Polysaccharide Sacran and Chitosan and Their Swelling Property
|
|
Shin Ho-Joon
Kwon Soon-Young
Choi Dong-Il
|
|
|
Abstract
|
|
|
|
Sacran is a heteroanionic polyelectrolyte, forms liquid crystal (LC) gels at low concentration (c > 0.5 wt%) and has high water contents (97.5 ~ 98.3 wt%). Although various researchers reported chemically crosslinked sacran gels with a more stable structure, water content of these sacran gels was lower than that of conventional sacran gel. In this present study, we newly prepared and characterized chemically crosslinked-hydrogel composed of a mega molecular polysaccharide sacran and chitosan with high water content. We successfully synthesized a chemically crosslinked sacran-chitosan hydrogel by a condensation reaction with DMT-MM. Crosslinking between carboxyl group of scran and amine group of chitosan was observed by FT-IR, TGA, DSC and XRD analysis. Saran-chitosan hydrogels showed high water content (98 ~ 99 %), which is superior to that of conventional sacran gels. Water content of hydrogels was highest in the order of DW > NaCl > CaCl2 solution and tended to decrease as the concentration of NaCl and CaCl2 increased. This result can be explained that salt addition broke the nanoloops of sacran network, which retained water molecules, and caused decrease of retention capacity of hydrogels.
|
|
|
KEYWORD
|
|
|
Sacran, Chitosan, Polysaccharide, Hydrogel, Swelling
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|