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eNews from Thursday, January 26, 2012

New Research Indicates Soy Protein Isolate Films May Have Applications As Surgical Dressings

Journal of Engineering -- January 25, 2012 -- According to the authors of recent research from Tianjin, People's Republic of China, "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 C-13 nuclear magnetic resonance (NMR) spectra confirmed that Maillard reactions occurred between SPI and CMC. The Hunter color value (I., 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," wrote J.F. Su and colleagues, Tianjin University.

The researchers concluded: "These results indicated that the structure and properties of SPI-based films could be modified and improved by blending with CMC."

Su and colleagues published their study in Materials Science & Engineering C-Materials for Biological Applications (Physicochemical properties of soy protein isolate/carboxymethyl cellulose blend films crosslinked by Maillard reactions: Color, transparency and heat-sealing ability. Materials Science & Engineering C-Materials for Biological Applications, 2012;32(1):40-46).

For additional information, contact J.F. Su, Tianjin University, Sch Mat Sci & Engn, Tianjin 300072, People's Republic of China.

Publisher contact information for the journal Materials Science & Engineering C-Materials for Biological Applications is: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands.

(c) 2012 Journal of Engineering via

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