Cellulose-chitosan beads crosslinked by dialdehyde cellulose

Crosslinked cellulose-chitosan beads were obtained via dissolution-regeneration of cellulose and chitosan by a LiOH/urea aqueous solution, followed by the crosslinking of chitosan via dialdehyde cellulose (DAC). This crosslinking reaction involved the Schiff base formation between the aldehyde group...

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Veröffentlicht in:Cellulose (London) 2017-12, Vol.24 (12), p.5517-5528
Hauptverfasser: Kim, Ung-Jin, Kim, Hyeon Joo, Choi, Joon Weon, Kimura, Satoshi, Wada, Masahisa
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container_issue 12
container_start_page 5517
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creator Kim, Ung-Jin
Kim, Hyeon Joo
Choi, Joon Weon
Kimura, Satoshi
Wada, Masahisa
description Crosslinked cellulose-chitosan beads were obtained via dissolution-regeneration of cellulose and chitosan by a LiOH/urea aqueous solution, followed by the crosslinking of chitosan via dialdehyde cellulose (DAC). This crosslinking reaction involved the Schiff base formation between the aldehyde groups of DAC and the amino groups of chitosan and subsequent reduction. DAC was prepared through periodate oxidation of cellulose and solubilization in hot water at 100 °C for 1 h. Four grades of DAC-crosslinked cellulose-chitosan were prepared by controlling the amount of cellulose and chitosan. The DAC-crosslinked cellulose-chitosan showed higher stability in the pH range of 2–9 over a long-term 21-day test. Additionally, the DAC-crosslinked chitosan showed a higher bovine serum albumin adsorption capacity as a result of the increased amino group content due to the crosslinking between DAC and chitosan, which occurred at multiple points in spite of a lower degree in crosslinking.
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subjects Aldehydes
Aqueous solutions
Beads
Bioorganic Chemistry
Cellulose
Ceramics
Chemistry
Chemistry and Materials Science
Chitosan
Composites
Crosslinking
Glass
Hot water
Imines
Natural Materials
Organic Chemistry
Original Paper
Oxidation
Physical Chemistry
Polymer Sciences
Regeneration
Serum albumin
Solubilization
Sustainable Development
title Cellulose-chitosan beads crosslinked by dialdehyde cellulose
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