Increase in optical transmittance of SPI-Gelatin composite films
is evidence for good compatibility between SPI and gelatin (Bai, Xu,
Liao, & Liu, 2013; Guerrero, Stefani, Ruseckaite, & de la Caba, 2011;
Kaewprachu & Rawdkuen, 2014). The pure SPI film and gelatin film
surfaces are hydrophilic in the presence of hydroxyl, amino and
carboxyl groups. The gelatin content had an important effect on
interaction force between SPI and gelatin, which would result in the
exposing of hydrophobic groups initially buried in SPI.
Increase in optical transmittance of SPI-Gelatin composite filmsis evidence for good compatibility between SPI and gelatin (Bai, Xu,Liao, & Liu, 2013; Guerrero, Stefani, Ruseckaite, & de la Caba, 2011;Kaewprachu & Rawdkuen, 2014). The pure SPI film and gelatin filmsurfaces are hydrophilic in the presence of hydroxyl, amino andcarboxyl groups. The gelatin content had an important effect oninteraction force between SPI and gelatin, which would result in theexposing of hydrophobic groups initially buried in SPI.
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