UV-blocking biodegradable film based on flaxseed mucilage/pectin impregnated with titanium dioxide and calcium chloride for food packaging applications.

Autor: Akhila K; Department of Paper Technology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India., Ramakanth D; Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India., Rao LL; Department of Paper Technology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India., Gaikwad KK; Department of Paper Technology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India. Electronic address: kirtiraj.gaikwad@pt.iitr.ac.in.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2023 Jun 01; Vol. 239, pp. 124335. Date of Electronic Publication: 2023 Apr 06.
DOI: 10.1016/j.ijbiomac.2023.124335
Abstrakt: A UV blocking and potentially biodegradable composite films are fabricated from flax seed mucilage and pectin with different concentrations of titanium dioxide (TiO 2 ) and crosslinked with calcium chloride (CaCl 2 ). This study aimed to evaluate the physical, surface, and optical properties including color, potential biodegradability, and absorption kinetics of the developed film. From the observations made, addition of 5 wt% TiO 2 enhanced UV barrier property with a total color change (ΔE) of 23.441 ± 0.54 and increased its crystallinity to 54.1 % from 43.6 %. Crosslinking agent and TiO 2 resulted in a prolonged period of biodegradation of >21 days when compared to neat film. Also, swelling index of crosslinked film was reduced by 3 times of non-crosslinked films. Surface of the developed films has no cracks and agglomerates as observed from scanning electron microscope. Moisture absorption kinetic study reveals that all the films have best-fit data following a pseudo-second-order kinetic model with a correlation coefficient ≥0.99 and the rate was controlled by inter-particle diffusion. The film with 1 wt% TiO 2 and 5 wt% CaCl 2 showed the lowest rate constants (k 1 ) of 0.27 and (k 2 ) of 0.029. The results suggest that this film can be potentially used in food packaging as a UV-blocking layer with potential biodegradability and good moisture resistance as compared to pure flax seed mucilage or pectin films.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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