Soy Protein Isolate Based Films: Influence Of Sodium Dodecyl Sulfate And Polycaprolactone-Triol On Their Properties
MACROMOLECULAR SYMPOSIA(2005)
摘要
We report on the preparation and properties of soy protein isolate (SPI)-sodium dodecyl sulfate (SDS)-polycaprolactone-triol (PCL-T) films obtained by solvent casting from solutions containing variable amounts of SIDS or SDS/PCL-T. It is shown that the mechanical and thermal properties, and the morphology of SPI-based biofilms can be easily controlled by changing SIDS, PCL-T, and moisture contents, enabling the fabrication of rigid and flexible materials as pure SPI films [Young's modulus similar to 1400 MPa, elongation at break (E) similar to 2%, and glass transition temperature (T-g) similar to 150 degrees C] and SPI/SDS/PCL-T films with [PCL-T] >= 18% (Young's modulus similar to 50 MPa, E similar to 90%, and T-g similar to 135 degrees C), respectively. Micrographs taken at the cross-section of biofilms whose [PCL-T] >= 18% revealed the occurrence of a porous matrix, whereas a dense bulk phase was otherwise observed (pure SPI, SPI/SDS, and SPI/SDS/PCL-T films with [PCL-T] < 18%).
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关键词
biofilms,mechanical properties,morphology,soy protein isolate,thermal properties
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