Plasticizer effect on mechanical properties ofβ-lactoglobulin films

摘要

The mechanical properties(elastic modulus, EM; tensile strength, TS and /100 elongation, /100E)ofβ-lactoglobulin(β-Lg)films plasticized with different plasticizers were determined. Six plasticizer types were studied over a range of concentrations. Propylene- glycol-plasticizedβ-Lg films were the most brittle, with mechanical properties of plasticizer content. Films with other plasticizers studied(glycerol, Gly; sorbitol, Sor; polyethylene glycol, PEG 200 and PEG 400 sucrose, Suc)exhibited negative exponential dependence on plasticizer concentration for EM and TS, while they exhibited linear dependence on plasticizer con- centration for /100E.