3/26/2023 0 Comments Fish gelatin![]() The composite films of the gelatin/ZnO NRs were dried at 50% ± 5% relative humidity (RH) and 24☌ ± 1☌ for 24 h. The gelatin nanocomposite solution was then cooled to 40☌, and the bubbles were removed using a vacuum.Ī portion (90 g gelatin) of the dispersion was cast onto Perspex plates (England, UK) (150 mm × 150 mm × 3 mm). The gelatin nanocomposites were heated to 55☌ ± 5☌ and held for 45 min. Sorbitol (0.15 g/ g gelatin) and glycerol (0.15 g/ g gelatin) were added as plasticizers. The solution was cooled to ambient temperature and was used to prepare 5 wt.% aqueous gelatin. Thereafter, the mixture was exposed in an ultrasonic bath for 20 min. The mixture was heated at 70☌ ± 5☌ for approximately 45 min with constant stirring to dissolve the ZnO NRs completely. ZnO NRs were added to distilled water at different concentrations. Preparation of ZnO bio-nanocomposite films Figure 1b illustrates the transmission electron microscopy micrographs of ZnO NR clusters with 0.5 to 2 μm lengths and 50 to 100 nm diameters. ZnO NRs were observed in different lengths and widths because of the large variety in growth conditions in the CFCOM process. The films were characterized for their mechanical, electrical, and UV absorption properties. In this paper, ZnO NRs were used as fillers to prepare fish gelatin bio-nanocomposites. Furthermore, fish gelatin can be used with minimal religious prohibition in Islam, Judaism, and Hinduism. ![]() Marine gelatin sources are not related to the risk of bovine spongiform encephalopathy. Current researchers have focused on the use of marine gelatin sources as alternatives to mammalian gelatins, such as those from fish. Mammalian gelatin films commonly have excellent mechanical properties compared with other types of gelatin films. Thus, several experts have concentrated their research on gelatin films made from mammalian sources, such as porcine and bovine. The use of gelatin as an organic additive in composites with inorganic nanohybrids has recently gained increasing interest because of the bioadhesive and biodegradable properties of gelatin. ZnO nanostructures in various morphologies, such as discs, rods, tubes, spheres, and wires, have been easily synthesized by the precipitation of surfactants followed by hydrothermal processes (120☌) and low temperature thermolysis (80☌). ZnO nanostructures can be simply grown by chemical techniques under moderate synthesis conditions with inexpensive precursors. Furthermore, functional nano-ZnO displays antibacterial properties in neutral pH even with small amounts of ZnO. ZnO has better advantages than TiO 2 because ZnO can block UV in all ranges (UV-A, UV-B, and UV-C). However, such a process complicates the production of TiO 2 UV-active coatings for textiles. TiO 2 is more efficient in photoactivity when TiO 2 precursor coatings are heat treated at 400☌. TiO 2/Ag, ZnO-starch, and ZnO/SiO 2/polyester hybrid composites have been investigated for UV-shielding textile coatings. Moreover, these materials offer antimicrobial, antifungal, antistatic, and UV-blocking properties. ![]() Metal oxides, such as ZnO, MgO, and TiO 2, are used extensively to construct functional coatings and bio-nanocomposites because of their stability under harsh processing conditions and safety in animal and human applications. Nanorods (NRs) and nanoparticles combined with biomolecules are used for various applications in biomolecular sensors, bioactuators, and medicines, such as in photodynamic anticancer therapy. The combination of nanostructures and biomaterials provide an unrivaled opportunity for researchers to find new nanobiotechnology areas. These results indicated that bio-nanocomposites based on ZnO NRs had great potentials for applications in packaging technology, food preservation, and UV-shielding systems. The conductivity of the films also significantly increased with the addition of ZnO NRs. The surface topography of the fish gelatin films indicated an increase in surface roughness with increasing ZnO NR concentrations. X-ray diffraction showed an increase in the intensity of the crystal facets of (10 ī1) and (0002) with the addition of ZnO NRs in the biocomposite matrix. UV transmission decreased to zero with the addition of a small amount of ZnO NRs in the biopolymer matrix. Results showed an increase in Young's modulus and tensile strength of 42% and 25% for nanocomposites incorporated with 5% ZnO NRs, respectively, compared with unfilled gelatin-based films. The effects of ZnO NR fillers on the mechanical, optical, and electrical properties of fish gelatin bio-nanocomposite films were investigated. Well-dispersed fish gelatin-based nanocomposites were prepared by adding ZnO nanorods (NRs) as fillers to aqueous gelatin.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |