Rheological Studies on Glycerol Plasticized Gelatin and Its Blends with Epoxidized Soybean Oil

CIANNAMEA E.M; CASTILLO, L.; RUSECKAITE R.A.; BARBOSA S.E.

ournal of Renewable Materials

Scrivener pUB

Año: 2019

2164-6325

Blends of gelatin (Ge) plasticized with varying amounts of glycerol(Gly), buffer solution pH 10 and epoxidized soybean oil (ESO) to enhancehydrophobicity were prepared by mixing and injection-molding. Blends werecharacterized by rheological tests and microscopy to select optimal conditionsfor scaling up their processing. The effect of each component on rheologicalresponse was analyzed using parallel plate geometry. Coating of gelatinspecimens with PDMS during rheological tests led to reliable and reproducibleresults since water evaporation was prevented. A gradual increment in ESOconcentration led to blends with an increased degree of phase separation, asevidenced by optical and confocal microscopy. Limited compatibility betweenESO and Ge increased viscosity at high ESO levels, but up to 10% Gly could bereplaced with ESO without a significant variation of rheological behavior.