| Summary: | Rheology of film solution is important to determine the final characteristics of biopolymer film as packaging material. In this study, the dynamic rheological properties of cassava starch-kaffir lime oil film solution were determined. The rheology measurement was made at frequency of 0.1 to 10 Hz and 1 % strain at 25 °C. The storage modulus (G'), loss modulus (G') and complex viscosity (η∗) were determined to know the viscoelastic behavior of the film solution. The magnitude of G' was greater than G' for all samples which indicated that the film solution was a gel-like; that is, the film solution behaves more like a solid where the deformations were elastic and recoverable. All samples show increasing trend of G' and G' as the frequency increased. The complex viscosity decreased with increasing frequency which presented a shear thinning behavior of the film solution. The dynamic rheological properties of cassava starch-kaffir lime oil film solution was determined appropriately, thus the characterization of produced biopolymer film by casting can be correlated. © Published under licence by IOP Publishing Ltd.
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