Biomaterials, Biodegradables and Biomimetics Research Group

Papers in Scientific Journals

The potential of cashew gum functionalization as building blocks for layer-by-layer films

Abstract

Cashew gum (CG), an exudate polysaccharide from Anacardium occidentale trees, was carboxymethylated (CGCm) and oxidized (CGO). These derivatives were characterized by FTIR and zeta potential measurements confirming the success of carboxymethylation and oxidation reactions. Nanostructured multilayered films were then produced through layer-by-layer (LbL) assembly in conjugation with chitosan via electrostatic interactions or Schiff bases covalent bonds. The films were analyzed by QCM-D and AFM. CG functionalization increased the film thickness, with the highest thickness being achieved for the lowest oxidation degree. The roughest surface was obtained for the CGO with the highest oxidation degree due to the predominance of covalent Schiff bases. This work shows that nanostructured films can be assembled and stabilized by covalent bonds in alternative to the conventional electrostatic ones. Moreover, the functionalization of CG can increase its feasibility in multilayers films, widening its potential in biomedical, food industry, or environmental applications.

Journal
Carbohydrate Polymers
Volume
174
Pagination
849-857
Publisher
Elsevier
ISSN
0144-8617
URL
http://www.sciencedirect.com/science/article/pii/S0144861717306926
Keywords
Biomimetics, Cashew gum, Chitosan, layer-by-layer, Natural biomaterials
Rights
Restricted Access
Peer Reviewed
Yes
Status
published
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