Structural Investigation of a Self-Cross-Linked Chitosan/Alginate Dialdehyde Multilayered Film with in Situ QCM-D and Spectroscopic Ellipsometry

Junhao Huang, Saeed Zajforoushan Moghaddam, Esben Thormann*

*Corresponding author for this work

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Abstract

A chitosan/alginatedialdehyde multilayered filmwas fabricated using the layer-by-layer assembly method. Besides electrostaticinteraction that promotes alternate adsorption of the oppositely chargedpolyelectrolytes, the Schiff base reaction between the amine groupson chitosan and the aldehyde groups on alginate dialdehyde providesa covalently cross-linked film, which after reduction by sodium cyanoborohydrideis stable under both acidic and alkaline conditions. Moreover, the cross-linked film is responsive to changes in pH and addition of multivalentsalts. The structural properties of the multilayered film such asthickness, refractive index, and water content were examined usingsimultaneous quartz crystal microbalance with dissipation monitoringand spectroscopic ellipsometry.
Original languageEnglish
JournalACS Omega
Volume4
Issue number1
Pages (from-to)2019-2029
Number of pages11
DOIs
Publication statusPublished - 2019

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