METHOD OF PRODUCING COMPOSITE MATERIAL HAVING PHOTOCATALYTIC PROPERTIES Russian patent published in 2019 - IPC B01J21/06 B01J37/34 C01G23/47 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to functional polymer composite materials containing metal particles and/or metal oxides, and more specifically relates to methods of producing hybrid composite materials containing titanium dioxide in a polymer matrix and having pronounced photocatalytic properties. Described is a method of producing a composite material having photocatalytic activity by forming a methylolacrylamide polymer matrix with embedded titanium dioxide TiO₂ particles from aqueous solution containing acrylamide monomer, cross-linking agent N, N'-methylene-bis-acrylamide and titanium dioxide, characterized in that the polymer matrix is formed in the form of a film on the surface of the electrode from the electroconductive material by electrochemical polymerisation during 2–5 min in potentiostatic mode at potential in the range of -0.95÷-1.25 V relative to standard silver chloride electrode, wherein the prepared solution further contains formaldehyde, zinc chloride, an antifoaming agent Penta 4060 and a nonionic surfactant Glucopon 650 EC, with the following content of components, g/l: acrylamide 210–490 monomer, cross-linking agent N,N'-methylene bis-acrylamide 6.0–12.2, titanium dioxide 0.5–2.5, formaldehyde 90–210, zinc chloride 7.0–27.0, non-ionogenic surfactant Glucopon 650 EC 0.5–2.5, antifoiler Penta 4060 0.08–0.12. Prior to use, the initial solution is subjected to ultrasound treatment. Formed composite film is separated from conducting electrode.

EFFECT: simplification of the technology and hardware design of the method, shorter time for its implementation by combining in one process intermediate steps of forming a polymer matrix and introducing into it particles of titanium dioxide, low power consumption with simultaneous improvement of the quality of the obtained material.

1 cl, 2 dwg, 1 tbl, 5 ex