Preparation and properties of chitosan-poly(N-isopropylacrylamide) semi-IPN hydrogels

✍ Scribed by Mingzhen Wang; Junchao Qiang; Yu Fang; Daodao Hu; Yali Cui; Xiangu Fu

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 157 KB
• Volume: 38
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(20000201)38:3<474::aid-pola12>3.0.co;2-b

✦ Synopsis

Chitosan (CS), CS-poly(N-isopropylacrylamide)(PNIPAM) and their dyed (pyrene) hydrogels were prepared using glutaraldehyde (Glu) as a crosslinker. The gelation rate, swelling behaviors in ethanol/water mixtures, electricity-induced contraction and thermoresponse of the gels were investigated using fluorescence probe technique. Results showed that CS/Glu, and PNIPAM-containing CS/Glu gels exhibited similar properties in all aspects examined, except that the transparence of the CS-PNIPAM/Glu gel is very dependent upon the temperature. The CS-PNIPAM/Glu gel is transparent below 30°C, whereas opaque above 32°C. It is expected that this observation may be useful for the design and preparation of new kinds of hydrogel devices.