ABSTRACT
In this study, biodegradable biomaterials were prepared by using inulin (INL), PVA and plasticizers (citric acid (CA), glycerol (GL) and thiamine (TH)) with UV curing process. INL was extracted from Jerusalem artichoke flour using hot water extraction method. Extracted INL and INL/PVA biomaterials were characterized by TLC, FT-IR, and SEM analysis. Physical properties such as mechanical and water resistance properties of biomaterials prepared with UV curing time from 0 to 20 min and types of plasticizers were investigated. Their antimicrobial activities, biodegradability, and application of coating materials for foods were also determined. Results indicated that their physical properties were improved by the UV curing process. In addition, physical properties of TH-added biomaterials were 1.5 to 2 times higher than those of GL-added and CA-added biomaterials. Biodegradability in soil revealed that biomaterials were degraded by about 20-40% after 140 days.
Subject(s)
Biocompatible Materials/chemistry , Food Packaging , Helianthus/metabolism , Inulin/analogs & derivatives , Plasticizers/chemistry , Polyvinyl Alcohol/chemistry , Thiamine/chemistry , Biodegradation, Environmental , Citric Acid/chemistry , Glycerol/chemistry , Solubility , Tensile StrengthABSTRACT
In this study, nanocomposite films were synthesized by chitosan (CH), PVA, ZnS, sulfosuccinic acid, and plasticizers. The nanocomposite films were cross-linked by the heat curing process. ZnS was synthesized by the reaction of Zn(CH3COO)2 and Na2S2O3·5H2O in aqueous solution via a template-free hydrothermal process. The prepared ZnS and CH/PVA nanocomposite films were characterized by X-ray diffraction, Fourier transform IR spectroscopy, and scanning electronic microscopy. The results of this study confirmed the presence of specific peaks of ZnS in the prepared nanocomposite films, and the intensity of these peaks increased with increasing ZnS contents. Tensile strength, elongation at break, water barrier properties, and thermal properties of the prepared nanocomposite films were also investigated, indicating that the addition of ZnS nanoparticles improved the physical and thermal properties. In addition, the photocatalytic degradability of the prepared films containing ZnS nanoparticles was evaluated using 2,4-dichlorophenoxyacetic acid and methyl orange.