Skip to Main Content
Semi-Interpenetrating polymer network hydrogels based on aspen hemicellulose and chitosan: Effect of crosslinking sequence on hydrogel propertiesAuthor(s): Muzaffer Ahmet Karaaslan; Mandla A. Tshabalala; Gisela Buschle-Diller
Source: Journal of Applied Polymer Science, Volume 124, pp. 1168-1177; 2012.
Publication Series: Scientific Journal (JRNL)
Station: Forest Products Laboratory
View PDF (700.54 KB)
DescriptionSemi-interpenetrating network hydrogel films were prepared using hemicellulose and chemically crosslinked chitosan. Hemicellulose was extracted from aspen by using a novel alkaline treatment and characterized by HPSEC, and consisted of a mixture of high and low molecular weight polymeric fractions. HPLC analysis of the acid hydrolysate of the hemicellulose showed that its major constituent sugar was xylose. X-ray analysis showed that the relative crystallinity of hydrogels increased with increasing hemicellulose content up to 31.3%. Strong intermolecular interactions between chitosan and hemicellulose were evidenced by FT-IR analysis. Quantitative analysis of free amino groups showed that hemicellulose could interrupt the chemical crosslinking of chitosan macromolecules. Mechanical testing and swelling experiments were used to define the effective network crosslink density and average molecular weight between crosslinks. Swelling ratios increased with increasing hemicellulose content and mainly consisted of H-bonded bound water. Results revealed that by altering the hydrogel preparation steps and hemicellulose content, crosslink density and swelling behavior of semi-IPN hydrogels could be controlled without deteriorating their mechanical properties.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationKaraaslan, Muzaffer Ahmet; Tshabalala, Mandla A.; Buschle-Diller, Gisela. 2012. Semi-interpenetrating polymer network hydrogels based on Aspen hemicellulose and chitosan: Effect of crosslinking sequence on hydrogel properties. Journal of Applied Polymer Science. 124: 1168-1177.
Keywordshemicellulose, hydrogel, film, semi-interpenetrating, chitosan
- Wood hemicellulose/chitosan-based semi-interpenetrating network hydrogels : mechanical swelling and controlled drug release properties
- Nanoreinforced biocompatible hydrogels from wood hemicelluloses and cellulose whiskers
- Lignin-containing cellulose nanofibril-reinforced polyvinyl alcohol hydrogels
XML: View XML