Abstract
Abstract Corn starch (CS)/polyvinyl alcohol (PVA)/rice husk (RH) based bio-composite films were prepared by adding fructose (F) and citric acid (CA) as a plasticizer and cross-linking agent, respectively. The influence of drying temperature, plasticizer, and cross-linker on the film properties (physical) was investigated. The mechanical properties (tensile strength (TS) & elongation at break (E)) along with degree of swelling (DS), solubility (S), and water vapor permeability (WVP) of CS/PVA/RH blend films were examined with and without adding the plasticizer F and cross-linker CA. At all measurement’s conditions, the films having CA show better physical properties than the film containing F alone. In the presence of CA, the hydrogen bonding between a hydroxyl group and the carboxyl group enhances inter-intra-molecular interaction among CS, PVA, and RH. With the addition of plasticizer (F); % E, S, WVP of CS/PVA/RH bio-composite films were increased as compared to corresponding cross-linker (CA) incorporated films. However, there was a decrease in TS and DS. Moreover, drying the film at low temperature shows clear improvement in the film properties due to activation of hydrogen bonding at low temperature.
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