✦ LIBER ✦

Hydrogels Prepared from Unsubstituted Cellulose in NaOH/Urea Aqueous Solution

✍ Scribed by Jinping Zhou; Chunyu Chang; Ruping Zhang; Lina Zhang

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 251 KB
Volume: 7
Category: Article
ISSN: 1616-5187
DOI: 10.1002/mabi.200700007

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✦ Synopsis

Abstract

Novel cellulose hydrogels were synthesized through a “one‐step” method from cellulose, which was dissolved directly in NaOH/urea aqueous solution, by using epichlorohydrin as crosslinker. Structure and properties of the hydrogels were characterized by using SEM, NMR, and water absorption testing. The hydrogels are fully transparent and display macroporous inner structure. The equilibrium swelling ratios of the hydrogels in distilled water at 25 °C are in the range from 30 to 60 g H~2~O/g dry hydrogel. Moreover, the reswelling water uptake of the hydrogels could be achieved to more than 70% compared with their initial swelling states. This work provided a simple and fast method for preparing eco‐friendly hydrogels from unsubstituted cellulose.

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