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. 2022 Aug 6;23(15):8763.
doi: 10.3390/ijms23158763.

Rheological and Film-Forming Properties of Chitosan Composites

Katarzyna Lewandowska  1 , Marta Szulc  1
Affiliations

Rheological and Film-Forming Properties of Chitosan Composites

Katarzyna Lewandowska et al. Int J Mol Sci. .

Abstract

Chitosan (Chit) and its composite films are widely used in biomedical, cosmetic, and packaging applications. In addition, their properties can be improved and modified using various techniques. In this study, the effect of the type of clay in Chit composites on the structure, morphology, and physical properties of Chit solution and films was tested. The liquid flow properties of Chit solution with and without clay were carried out using the steady shear test. Chit films containing clay were obtained using the solution-casting method. The morphology, structure, and physical properties of the films were characterized by scanning electron microscopy, atomic force microscopy, infrared spectroscopy, swelling behavior, and tensile tests. The results reveal that for the Chit solution with clay (C1) containing 35 wt.% dimethyl dialkyl (C14-C18) amine, the apparent viscosity is the highest, whereas Chit solutions with other clays show reduced apparent viscosity. Rheological parameters of Chit composites were determined by the power law and Cross models, indicating shear-thinning behavior. Analytical data were compared, and show that the addition of clay is favorable to the formation of intermolecular interactions between Chit and clay, which improves in the properties of the studied composites.

Keywords: chitosan; clay; rheological properties; surface properties.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Curves of apparent viscosity vs. shear rate for Chit solution and Chit/clay mixtures at 25 °C.
Figure 2
Figure 2
Mechanical properties of Chit and Chit composite films: (a) TS, (b) YM, and (c) EB, before and after alkaline treatment, n = 5, mean ± SD (standard deviation), error bars represent SD.
Figure 3
Figure 3
Swelling ratio of Chit films and its composite films, n = 3, mean ± SD (standard deviation), error bars represent SD.
Figure 4
Figure 4
Representative SEM images of film surface of different composition (A) before and (B) after NaOH treatment (magnification ×1000, bar = 100 μm).
Figure 5
Figure 5
Representative AFM images of film surface of different composition (A) before and (B) after NaOH treatment.
Figure 6
Figure 6
ATR infrared spectra of (A) Chit and Chit composite films (B) before and (C) after NaOH treatment. The inserts are magnification, showing the region of 600–1800 cm−1, asterisks (*) indicate changes in the characteristic bands.
See this image and copyright information in PMC

References

    1. Santos V.P., Marques N.S.S., Maia P.C.S.V., Barbosa de Lima M.A., de Oliveira Franco L., de Campos-Takaki G.M. Review: Seafood waste as attractive source of chitin and chitosan production and applications. Int. J. Mol. Sci. 2020;21:4290. doi: 10.3390/ijms21124290. - DOI - PMC - PubMed
    1. Kurakula M., Raghavendra N.N. Review: Prospection of recent chitosan biomedical trends: Evidence from patent analysis (2009–2020) Int. J. Biol. Macromol. 2020;165:1924–1938. doi: 10.1016/j.ijbiomac.2020.10.043. - DOI - PubMed
    1. Khan A., Alamry K.A. Recent advances of emerging green chitosan-based biomaterials with potential biomedical applications: A review. Carbohydr. Res. 2021;506:108368. doi: 10.1016/j.carres.2021.108368. - DOI - PubMed
    1. Cheng S.-Y., Wang B.-J., Weng Y.-M. Antioxidant and antimicrobial edible zein/chitosan composite films fabricated by incorporation of phenolic compounds and dicarboxylic acids. LWT—Food Sci. Technol. 2015;63:115–121. doi: 10.1016/j.lwt.2015.03.030. - DOI
    1. Gabriele F., Donnadio A., Casciola M., Germani R., Spreti N. Ionic and covalent crosslinking in chitosan-succinic acid membranes: Effect on physicochemical properties. Carbohydr. Polym. 2021;251:117106. doi: 10.1016/j.carbpol.2020.117106. - DOI - PubMed

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