METHOD OF PRODUCTION OF THE NANOPOROUS POLYMERIC FILM WITH THE OPEN PORES Russian patent published in 2007 - IPC B29C55/06 C08J9/28 

FIELD: chemical industry; methods of production of the nanoporous polymeric films with the open pores.

SUBSTANCE: the invention is pertaining to the field of production of the nanoporous polymeric films with the open pores. The films may be used in production of the porous polymeric membranes, the sorbents, the gas-permeable materials, molds for production of the nanocomposites, etc. the invention allows to increase by 10 times the porosity of the films at saving the nanometric dimension of the pores. The method of production of the nanoporous polymeric films with the open pores includes the stage of the single axis drawing in the contact with the adsorption-active medium. The subsequent stages include withdrawal of the adsorption-active medium from the films and the thermal treatment of the films, which are conducted in the conditions of keeping the films stretched in the direction of the drawing. At least, one of the stages of the method, such as the drawing, the withdrawal of the adsorption-active medium from the film and the thermal treatment of the film is exercised with the additional adjustment of the cross-sectional dimensions of the films.

EFFECT: the invention allows to increase by 10 times the porosity of the films at saving the nanometric dimension of the pores.

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