METHOD OF FORMING MULTILAYER COATING ON PARTICLES AND DEVICE FOR IMPLEMENTATION THEREOF (OPTIONS) Russian patent published in 2019 - IPC B05D5/00 B82B3/00 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to the field of chemistry, in particular to equipment for chemical or physical laboratories and the method of their application, and can be used to form multi-layer composite coatings on submicro- or microparticles by the method of layer-by-layer adsorption. Method of forming a multilayer coating on particles consists in alternately applying layers of nanomaterial on submicron or microparticles, washing the particles after each layer application in the working module, which has two channels separated by a filtration membrane, by supplying a stream of particles with a deposited layer of nanomaterial to one of the channels, and a washing liquid in the other. First application is carried out by feeding into one of the channels of the nanomaterial, and in the other – the flow of submicro- or microparticles. Each subsequent application after washing is carried out by feeding submicro- or microparticles with a deposited layer of nanomaterial into one of the channels, and the flow of nanomaterial into the other. Application and washing is carried out at the same pressure and speed. Streams of particles and nanomaterial are supplied parallel to the surface of the filtration membrane, made permeable to the molecules of the nanomaterial and impermeable to submicro or microparticles. Device for implementing the method of forming a multilayer coating on particles contains blocks for supplying nanomaterial solutions, submicro or microparticles and washing fluid, connected to a working module with two channels separated along the longitudinal axis of the filtration membrane, and made with the possibility of placing in one of the channels of particles with a nanomaterial deposited thereon, and in the other – a washing liquid. Working module is designed to accommodate either a nanomaterial solution therein, and a submicro- or microparticle solution in the other, or a nanomaterial solution, and in the other – a solution of particles with nanomaterial deposited thereon. Filtration membrane is made metallized with a pore size from 70 nm to 1 mcm and with the possibility of passing through it molecules of a nanomaterial solution. Device for implementing the method of forming a multilayer coating on particles can contain at least one additional working module, performed similarly to the first one, and have two channels separated along the longitudinal axis of the filtration membrane. One of the channels of the additional module is designed to accommodate either a nanomaterial solution therein, and another – a solution of submicro- or microparticles, or a nanomaterial solution, and in the other – a solution of particles with nanomaterial deposited thereon.

EFFECT: technical result of the group of inventions is to increase the efficiency of the process of forming a multilayer coating on particles by the method of layer-by-layer adsorption due to the implementation of the flow-through deposition process while expanding the spectrum of nanomaterials used and maintaining automation.

13 cl, 7 dwg, 1 tbl