Abstract
Flaxseed mucilage was extracted with distilled water, dried and used for film production with polyvinyl alcohol (PVA) (ratio 1:1) of different hydrolysis degrees (88.0 and 98.3%). The properties of the films were evaluated by determining the thickness, tensile measurements, moisture content, water vapor permeability, apparent opacity, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) analysis and thermogravimetric analysis. Flaxseed mucilage, when mixed with PVA, produces less resistant, less rigid, more-flexible films, has a higher thermal stability, and does not change the water vapor barrier properties compared with pure mucilage films. SEM revealed that films with mucilage and PVA mixtures formed a compact and homogeneous structure, corroborating the FTIR spectra that indicated a chemical interaction between these two biopolymers. In general, the degree of PVA hydrolysis did not influence the properties of the films when mixed with flaxseed mucilage extract. Therefore, films obtained from mixtures of flaxseed mucilage and PVA can be an interesting and advantageous alternative for producing bio-based packaging.
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The authors thank CNPq for scholarship and financial support (Process No. 420055/2018-5) and the Multiuser Laboratory of Federal University—Paraná—Campus Londrina.
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de Paiva, P.H.E.N., Correa, L.G., Paulo, A.F.S. et al. Film production with flaxseed mucilage and polyvinyl alcohol mixtures and evaluation of their properties. J Food Sci Technol 58, 3030–3038 (2021). https://doi.org/10.1007/s13197-020-04806-7
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DOI: https://doi.org/10.1007/s13197-020-04806-7