Abstract
On the total earth wastes, nearly one-third was packaging wastes. Most of the packaging materials are non-biodegradable and non-recyclable. To overcome these issues, researchers turned their attention to develop biodegradable films(bio-films). In this article, through the solution casting method bio-films were developed by using water-soluble polyvinyl alcohol (PVA) and various proportions (5–25wt%) of rice hull powder as reinforcement filler. The effect of RHP on the PVA matrix was investigated by fourier-transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), thermogravimetric analysis, differential scanning calorimeter, tensile test, surface morphology studies, water vapor permeability, and antibacterial testing. FTIR result revealed the proper bonding between PVA/RHP in bio-films via strong hydrogen bonds. XRD result reveals a slight increase in the intensity of bio-films and the crystalline size was reported between 5.53 and 13.28 nm. The infusion of RHP in the matrix shows that tensile strength and tensile modulus increases gradually and reaches the maximum value of 23.32 MPa and 684 MPa respectively at 25% of RHP in PVA. Thermal behavior proved that the bio-films were strong enough to withstand the temperature up to 350 °C. The lower values of WVP possess a higher interaction of polymer chains. The bio-film samples form a good inhibition zone against both gram-positive and gram-negative bacteria and display remarkable antibacterial activity. From the microstructure images, it is visible that bio-films were homogenous, away from cracks and phase separation. By this evidence, RHP added PVA can be used as a packaging material.
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Ganesh Babu, A., Saravanakumar, S.S. Mechanical and physicochemical properties of green bio-films from poly(Vinyl Alcohol)/ nano rice hull fillers. Polym. Bull. 79, 5365–5387 (2022). https://doi.org/10.1007/s00289-021-03757-z
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DOI: https://doi.org/10.1007/s00289-021-03757-z