The development of ceramic membranes with different geometries and compositions extends the possibilities of industrial applications, inducing advantages in terms of increased permeability, membrane area by volume module and chemical, thermal and mechanical resistance. The use of low-cost raw materials is a trend that has grown in scientific research. The aim of this work is to prepare membranes with hollow fiber geometry from alumina and residue of quartzite, by the technique of immersion precipitation in distilled water from a mixture of ceramic mass with a solution of polyethersulfone and, synthesized in temperatures of 1100 ºC to 1500 °C. The hollow fiber membranes were characterized by chemical analysis, X-ray diffraction, particle size distribution, scanning electron microscopy, apparent porosity, flexural strength and permeated water flow by the membranes. The results indicated that the sintering temperature has direct influence on the formation of the mullite phase, and the properties of apparent porosity and permeate flow. The higher the sintering temperature (1400-1500 ° C) increase the formation of the mullite phase, the lower the porosity, as well as the lower the permeate water flow in the membranes. However, there was increase in flexural strength in the hollow fiber membranes with high temperature.
Curcumin is a polyphenolic component of Curcuma longa, highlighting in the literature by presenting medicinal properties such as: antioxidant, anti-inflammatory, antibacterial, antiparasitic, antimalarial and anticancer activities. From this, it has been used together with curcumin, chitosan, a biodegradable polymer of natural origin, in order to encapsulate curcumin from a polymer system. Thus, this study aimed to evaluate the morphological behavior of beads and powder chitosan/curcumin, by the Optical Microscopy (OM) technique in the presence of the solvent (methanol). From the pictures, it was noticed that the beads have in their external structure the presence of the drug in a punctual manner, but a more homogeneous internal region. Regarding the powder, it was observed that curcumin was well distributed and involved by chitosan, proving the good interaction between them. In the presence of the solvent, the beads and the powder showed a good distribution of curcumin.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.