Technology background
The advancement of nanotechnology applied to the textile industry has brought new possibilities of uses for these traditional materials, by incorporating new functionality by the use of nanomaterials, as bactericide and fungicide, electrical conduction, UV absorption, Water repellency, and others. The incorporation of the nano-porous substrates such as fabrics is usually performed through multiple stages, employing reagents and costly processes, high energy consumption, and generating a large volume of effluent that must be treated. Therefore, it is necessary to develop new processes that are simpler and lower cost to enable the production of these materials on a large scale.
Technology description
The present invention this is a process of synthesis, in which a porous substrate, impregnated with a solution containing zinc oxide precursor agents, It is dried by heating under conditions that allow the synthesis of nanoparticles in situ. The method developed is easy industrial implementation and adds the new material properties treated as, for example
, increasing the UV protection factor and bacterial action. The invention speeds up the process of synthesis and impregnation of the porous substrate and does not require expensive equipment, It can be applied to a diverse range of products.
Problem Fixed
The main problems solved by this invention are related to reduced costs and increased energy efficiency in the functionalization process of porous substrates (ex. tissue) to give these UV protection and bactericidal and / or fungicidal. In this method, the synthesis of ZnO nanoparticles occurs in-situ during the drying step, using simple low-cost reagents, in a simple and reproducibility.
Advantages
-No need to pre-treatments to the porous substrate;
-The synthesis of the zinc oxide takes place directly on the substrate of interest;
-The concentration of nano zinc oxide on the substrate is easily controlled technique for the, Just controlling the time of immersion of the porous substrate and / or the concentration of the solution;
-The product formed in-situ synthesis it is zinc oxide having high purity;
-The technique is used for heating the drying nanoparticles synthesis by reducing the number of process steps and energy consumption;
-The process allows, if there is interest, further treatment to the porous substrate;
-The product of the process it is nano zinc oxide, non-toxic material, that can be easily marketed.
Applications
Industrial sectors, pharmacists, Doctors and Agribusiness.
– antibacterial products (medical materials, cotton, diapers, absorbent, etc,);
– Products with greater protection to UV radiation (garments, EPI's, etc,).
Nível de Maturidade da Tecnologia (TRL – Technology Readiness Level)
Status of the technology
Patent filled by INPI.
Inventors
Such Antonio
Lauren Arrussul Carús
Ramaugusto the Portiuncula Vieira
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