Sticky poly(vinyl alcohol) hydrogels

✍ Scribed by Won-Ill Cha; Suong-Hyu Hyon; Daniel Graiver; Yoshito Ikada

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 349 KB
• Volume: 47
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1993.070470213

✦ Synopsis

Low-temperature gelation of poly (vinyl alcohol) (PVA) solution was performed in the presence of CaClz. The resulting PVA hydrogels showed high stickiness and excellent water-holding ability. These properties became more remarkable with increasing CaClz concentration in solvent. Furthermore, both the peel strength on stainless steel and the degree of swelling of the PVA hydrogel drastically increased as CaCI2 concentration was increased from 20 to 30 wt %. It is concluded that the sticky and water-holding properties of PVA hydrogels are intimately related to the state of hydration of Ca ions in aqueous environment.