Protein and glycerol contents affect physico-chemical properties of soy protein isolate-based edible films |
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| Authors: | Sabina Kokoszka Frederic Debeaufort Alicia Hambleton Andrzej Lenart Andree Voilley |
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| Affiliation: | 1. Department of Food Engineering and Process Management, Faculty of Food Sciences, Warsaw University of Life Sciences-SGGW (WULS-SGGW), 159c Nowoursynowska St., 02-776 Warsaw, Poland;2. IUT-Dijon Departement Genie Biologique, 7 Boulevard Dr. Petijean, B.P. 17867, F-21078 Dijon cedex, France;3. EMMA EA 581, Université de Bourgogne-AgrosupDijon, 1 Esplanade Erasme, F-21000 Dijon, France;1. MOE Key Laboratory of Wooden Material Science and Application, Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China;2. Department of Mechanical and Energy Engineering, University of North Texas, Denton, TX 76203, USA;1. Food Science Program, Division of Food Systems & Bioengineering, University of Missouri, Columbia, MO 65211, USA;2. Department of Food Engineering, Sichuan University, Chengdu 610065, PR China;1. Department of Chemical Engineering, Federal University of Paraná, 81531-990 Curitiba, PR, Brazil;2. Federal University of the Southern Border, 85301-970 Laranjeiras do Sul, PR, Brazil;1. College of Materials Science and Engineering, Northeast Forestry University, Harbin, PR China;2. Research Center of Wood Bionic Intelligent Science, Northeast Forestry University, Harbin, PR China;1. Department of Food Science, College of Agriculture, Isfahan University of Technology, Isfahan, 84156, Iran;2. Department of Chemical Sciences, University of Naples?Federico II”, Complesso Universitario di Monte S. Angelo, Via Cintia, 80126, Napoli, Italy |
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| Abstract: | This study was conducted to determine the effect of both soy protein and glycerol contents on physico-chemical properties of soy protein isolate-based edible (SPI) films. The aim of this study was to better understand the influence of SPI and GLY contents on the behavior of the physico-chemical properties of soy protein isolate-based films. Films were casted from heated (70 °C for 20 min) alkaline (pH 10) aqueous solutions of SPI at 6, 7, 8, and 9 (w/w %), glycerol (50%, w/w, of SPI) and SPI at 7 (w/w %), glycerol (40, 60, 70 %, w/w of SPI). Water vapor permeability (WVP), was measured at 25 °C and for four different relative humidities (30–100%, 30–84%, 30–75%, 30–53%). Surface properties and differential scanning calorimetry were also measured. Varying the proportion of SPI and GLY had an effect on water vapor permeability, wetting and thermal properties of SPI films. A synergistic effect of glycerol and protein was observed on the water vapor permeability. Glycerol and RH gradient strongly enhance the moisture absorption rates and permeability of SPI based films. SPI content weakly increases the WVP and does not modify the surface properties. The temperature of denaturation of soy protein decreases glycerol content except for the higher concentration whereas it increases with protein ratio.Industrial relevanceThis topic of research aims to control mass transfers within composite foods or betweenfoods and surrounding media (for instance the headspace in packagings). The targeted applications from this work deals with the food product coating or the coating of paper-based packaging for limiting both the loss of water and flavors by cheese based products. This will allow to maintain the weight of the cheese during “ripening” and commercialization, and also to prevent (off-) flavour dissemination from very odorant cheese as produced in France and Poland. |
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