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Development, Validation, and Performance of Chitosan-Based Coatings Using Catechol Coupling.

Clayton Souza Campelo¹, Pascale Chevallier¹, Caroline Loy¹

¹Laboratory for Biomaterials and Bioengineering, CRC-I, Department of Min-Met-Materials Eng., & University Hospital Research Center, Regenerative Medicine, Laval University, Quebec City, G1V 0A6, Canada.

Macromolecular Bioscience

|December 14, 2019

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Caffeic acid offers a superior method for grafting chitosan onto biodevices compared to dopamine. This novel approach enhances material-tissue interaction and biodevice functionality with improved coating properties.

Area of Science:

Biomaterials Science
Polymer Chemistry
Surface Engineering

Background:

Long-lasting polymer coatings on biodevices improve material-tissue interaction and functionality.
Natural polymers like chitosan offer biocompatibility, non-toxicity, and antimicrobial properties.
Covalent grafting enhances chitosan coating adhesion compared to physisorption.

Purpose of the Study:

To compare the efficacy of caffeic acid-chitosan grafting with dopamine-poly(ethylene glycol)-chitosan grafting.
To evaluate various properties of the resulting chitosan coatings.
To determine the potential advantages of caffeic acid-based grafting for biodevice applications.

Main Methods:

Chitosan grafting using caffeic acid and dopamine with poly(ethylene glycol) as a linking arm.

Keywords:

caffeic acid catechol chemistry chitosan surface modification

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Surface characterization using X-ray photoelectron spectroscopy and atomic force microscopy.

Assessment of hydrophilicity, stability, anticorrosion behavior, and non-toxicity.

Main Results:

Caffeic acid allows direct chitosan grafting, simplifying the process compared to dopamine.
Coatings were evaluated for homogeneity, hydrophilicity, stability, and anticorrosion properties.
Results suggest caffeic acid/chitosan grafting in solution may be advantageous over traditional dopamine coating.

Conclusions:

Caffeic acid-based chitosan grafting presents a promising alternative for biodevice surface modification.
This method offers potential improvements in coating properties and application efficiency.
Further investigation into solution-based grafting of caffeic acid/chitosan is warranted.