Biodegradable, UV absorber and thermal stable bioplastic films from waxy corn starch/polyvinyl alcohol blends

Abstract Chemically modified waxy corn starch is a promising material for biodegradable bioplastic synthesis. This work to study the film performance and microbial enzymatic biodegradation of made from chemically according effect pre-gelatinization cardanol oil with various ratios as mixed plasticizer sorbitol. The preparation films maize acetylated di-starch adipate (WADA) pregelatinized (PWADA) blended polyvinyl alcohol polymer using sorbitol mixture plasticizers were performed. Characterization biodegradability by enzymes (alpha-amylase glucoamylase) soil burial test. weight loss reached 96% degradation percentage 95.5% PWADA these results significantly ( p < 0.05) lower than WADA; proved high-performance liquid chromatography, increasing osmolality evidence measured osmometer physical appearance indicated complete after 21 days. morphology, chemical structure, crystallinity, transparency, thermal stability studied scanning electron microscope, Fourier-transformed infrared, X-ray diffraction, UV–Vis spectrophotometer, gravimetric analysis. As result, under had more homogenous surface. films’ infra-red spectra showed similar patterns, indicating identical structures. Waxy has an A-type crystalline structure thermoplasticization, diffractogram new peaks appeared at 2θ 13.2°, 19.5°, 20.8°, which attributed V-type crystal pattern. addition restricts transmission light in UV region 250 nm 69 63.4%, respectively, absorber films. Furthermore, adding increased onset deterioration 272 318 °C 317 320 °C, that their improved. water uptake rate vapor permeability increase WADA without but slightly decrease oil. Also, decreases elongation 33.3% while strength 10.5% Hence, waxy-modified potential be biodegradable, stable, packaging material.