The potential of cashew gum functionalization as building blocks for layer-by-layer films
authors Leite, AJ; Costa, RR; Costa, AMS; Maciel, JS; Costa, JFG; de Paula, RCM; Mano, JF
nationality International
journal CARBOHYDRATE POLYMERS
author keywords Chitosan; Cashew gum; Layer-by-layer; Biomimetics; Natural biomaterials
keywords ANACARDIUM-OCCIDENTALE GUM; ATOMIC-FORCE MICROSCOPY; TREE GUM; DRUG-DELIVERY; MULTILAYER FILMS; EXUDATE POLYSACCHARIDE; ANTIMICROBIAL ACTIVITY; RHEOLOGICAL PROPERTIES; CONJUGATED POLYMERS; EXPONENTIAL-GROWTH
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. (C) 2017 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0144-8617
isbn 1879-1344
year published 2017
volume 174
beginning page 849
ending page 857
digital object identifier (doi) 10.1016/j.carbpol.2017.06.055
web of science category Chemistry, Applied; Chemistry, Organic; Polymer Science
subject category Chemistry; Polymer Science
unique article identifier WOS:000407696800092
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journal analysis (jcr 2017):
journal impact factor 5.158
5 year journal impact factor 5.326
category normalized journal impact factor percentile 93.599
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