title: Physicochemical properties of soy protein isolate/carboxymethyl cellulose blend films crosslinked by Maillard reactions: color, transparency and heat-sealing ability.
abstract: Soy protein isolate (SPI) films have many potential applications in the biomaterial field as surgical dressings for burns, films for reduction of wound inflammation, and facial masks. The appearance and the sealing ability are important physicochemical properties that greatly influence consumer acceptance of such protein-based films. The aim of the present work was to investigate the chemical structure and the physical properties associated with color, transparency and heat-sealing ability for SPI/carboxymethyl cellulose (CMC) blend films prepared by solution casting, with weight proportions 90/10, 80/20, 70/30 and 60/40. Fourier transform infra-red (FTIR) and solid-state (13)C nuclear magnetic resonance (NMR) spectra confirmed that Maillard reactions occurred between SPI and CMC. The Hunter color value (L, a, b) and transparency of films were affected by varying the proportions of SPI and CMC. With increasing degree of crosslinking of SPI and CMC, the yellow color of the films was diluted and transparency was improved. Peel strength and tensile strength measurements showed that the Maillard reactions had the main effect of enhancing the heat-sealing ability above the melting temperature. These results indicated that the structure and properties of SPI-based films could be modified and improved by blending with CMC.
authors.affiliation: Institute of Materials Science & Chemical Engineering, Department of Packaging Engineering, Tianjin University of Commerce, Tianjin 300134, China. sujunfeng2000@yahoo.com.cn
authors.forename: Jun-Feng
authors.initials: JF
authors.lastname: Su
authors.forename: Xiao-Yan
authors.initials: XY
authors.lastname: Yuan
authors.forename: Zhen
authors.initials: Z
authors.lastname: Huang
authors.forename: Xin-Yu
authors.initials: XY
authors.lastname: Wang
authors.forename: Xu-Zhen
authors.initials: XZ
authors.lastname: Lu
authors.forename: Li-Dan
authors.initials: LD
authors.lastname: Zhang
authors.forename: Sheng-Bao
authors.initials: SB
authors.lastname: Wang
mesh_terms: D001672:Biocompatible Materials; D002266:Carboxymethylcellulose Sodium / Q000737:chemistry*; D003116:Color; D003432:Cross-Linking Reagents / Q000737:chemistry; D006358:Hot Temperature; D009682:Magnetic Resonance Spectroscopy; D015416:Maillard Reaction; D008422:Materials Testing; D030262:Soybean Proteins / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013718:Tensile Strength
chemical_list: D001672:Biocompatible Materials; D003432:Cross-Linking Reagents; D030262:Soybean Proteins; D002266:Carboxymethylcellulose Sodium