Control of Dissolution Rate of Sodium-Alginate/Polyacrylamide Hydrogel for Selectively Dissolvable Water-Blocking Device

초록

The objective of this study was to examine changes in the dissolution rate of sodium-alginate/polyacrylamide (SA/PAM) hydrogel according to water temperature and concentration of cross-linking agent N,N'-methylenebisacrylamide (MBAAm). Results confirmed that swelling and dissolution rates of the SA/PAM hydrogel were increased when the temperature of the water was increased or the amount of MBAAm was decreased. When water temperature was increased, ionic crosslinks became unstable and amide bonds were broken due to hydrolysis, causing the hydrogel to rapidly dissolve in the hot water. Also, after the amount of MBAAm was decreased, ionic crosslinks became dominant and SA/PAM hydrogel became more vulnerable to hot water. Here, we analyzed the dissolution rate of hydrogel following temperature and MBAAm density changes. We also developed a selectively dissolvable water-blocking hydrogel that could be stable in cold water and become dissolved quickly in hot water.

키워드