Activation of the surface of cotton fabrics before chemical copper plating is proposed to be carried out by applying dispersed copper particles. For this purpose, physical and chemical processes that occur in thin layers of copper chloride solutions under the influence of electromagnetic solar rays of the visible spectrum are used. Initially, copper chlorides interact with cellulose, which is the main component of the tissue, and form copper monochloride. It is shown that this interaction is stimulated by solar rays. After that, the fabric is moistened with a solution of ascorbic acid and again exposed to sunlight. Under the action of photons of solar radiation, electrons in a semiconductor acquire additional energy and restore copper to the elemental state, and the vacancies formed are filled with electrons due to the oxidation of ascorbic acid. As a result of these processes, a film is formed on the surface of the tissue containing copper particles that can catalyze chemical copper plating.
To activate the surface of cotton fabrics before chemical nickel plating, it is proposed to use physical and chemical processes occurring in thin layers of solutions of copper (II) chloride under the influence of electromagnetic solar rays of the visible spectrum. It is shown that cellulose, which is the main component of the fabric, undergoes photo-oxidation in the presence of copper (II) chloride. As a result of this interaction, well-bonded copper monochloride is formed. When further processing of the fabric with phosphine gas, copper monochloride is transformed into copper and copper phosphide. Copper phosphide is a catalyst for the chemical nickel plating process. This makes it possible to obtain an electrically conductive nickel-phosphorus coating on the surface of the fabric in conventional electrolytes of chemical nickel plating. It is also found that when screening individual sections, the processes leading to the formation of copper monochloride do not occur. This allows selective metallization of the fabric.
PREPARATION OF ANTIBACTERIAL COPPER-CONTAINING NANOFILMS ON DIELECTRIC SURFACESAnnotation. Activation of the surface of cotton fabrics before obtaining a chemical copper film is recommended to be carried out by precipitation of dispersed copper particles. For this purpose, physical and chemical processes occurring in thin layers of copper chloride solutions under the influence of the visible spectrum of electromagnetic solar radiation are used. In this case, copper chlorides interact with cellulose, which is the main component of the fabric, forming copper monochloride. It is shown that this interaction occurs from exposure to sunlight. After that, the fabric is moistened with a solution of ascorbic acid and again exposed to solar radiation. Electrons located in a semiconductor under the influence of solar photons receive additional energy and oxidize the copper element, and the free spaces that appear in this case are filled with electrons depending on the oxidation of ascorbic acid. As a result of these processes, a shell containing copper particles that can catalyze the chemical copper is formed on the surface of the tissue.
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