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Gelatin plasticized with a biodiesel coproduct stream

Stevens, Eugene S., Ashby, Richard D., Solaiman, Daniel K.Y.
Journal of biobased materials and bioenergy 2009 v.3 no.1 pp. 57
gelatin, films (materials), plasticizers, byproducts, biodiesel, mechanical properties, glycerol, tensile strength, biopolymers, fats and oils industry, refining, cost analysis, thermoplastics, starch
Cast gelatin films were plasticized with a biodiesel coproduct stream (BCS). Films were well formed and appeared homogeneous by visual inspection. There is no deterioration in mechanical properties when BCS replaces glycerol as plasticizer. A BCS content of 18-34% resulted in elongations of 35-182%, with corresponding tensile strengths of 45-6 MPa and elastic moduli of 1330-38 MPa. Factor analysis indicated that replacing glycerol with BCS increases elongation but has little effect on tensile strength or modulus. The use of BCS as a plasticizer for biopolymers would increase the value of BCS, increase the value of agricultural fats and oils from which biodiesel is synthesized, and increase the feasibility of fuel production in a biorefinery. The use of low-cost BCS may also increase the feasibility of producing thermoplastics from gelatin and from other biopolymers now more expensive than starch.