pH effect on correlation between water state and swelling kinetics of the crosslinked chitosan/polyether semi-IPN hydrogel

✍ Scribed by Yun Lin Guan; Lei Shao; Jing Liu; Kang De Yao

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 412 KB
• Volume: 62
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19961121)62:8<1253::aid-app15>3.0.co;2-8

✦ Synopsis

SYNOPSIS

The water state in crosslinked chitosan/polyether semi-IPN(cr-CS/PE semi-IPN) hydrogels swollen in buffer solutions with various pH values was studied using differential scanning calorimetry (DSC). The results show that the total water content and the amount of bound water is related to the pH values of the swelling medium. The swelling kinetics of the hydrogel was investigated as well. The diffusion coefficient is correlated with the water state of the swollen hydrogel. It suggests that the change in the diffusion coefficient is related to the relative composition of bound water and nonbound water.