Protein adsorption of dialdehyde cellulose-crosslinked chitosan with high amino group contents.

Published on May 1, 2017in Carbohydrate Polymers7.182
· DOI :10.1016/J.CARBPOL.2017.01.052
Ung-Jin Kim19
Estimated H-index: 19
(Kyung Hee University),
Yeong Ro Lee1
Estimated H-index: 1
(Kyung Hee University)
+ 3 AuthorsMasahisa Wada9
Estimated H-index: 9
(Kyoto University)
Abstract Crosslinked chitosan was prepared by Schiff base formation between the aldehyde groups of dialdehyde cellulose (DAC) and the amino groups of chitosan and a subsequent reduction. DAC was obtained through periodate oxidation of cellulose and solubilization in hot water at 100 °C for 1 h. Three grades of DAC-crosslinked chitosan were prepared by adding various amounts DAC. The degrees of crosslinking as determined by amino group content were 3.8, 8.3, and 12.1%, respectively. DAC-crosslinked chitosan showed higher stability in the pH 2–9 range and no cytotoxicity was identified over the course of a 21-day long-term stability test. Also, DAC-crosslinked chitosan showed remarkably high bovine serum albumin (BSA) adsorption capacity at pH 5.5 as a result of the increased amino group content, due to the reaction between DAC and chitosan molecular chains occurring at multiple points even though DAC-crosslinked chitosan showed a lower degree of crosslinking.
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