Method for production of antimicrobial silver-containing cellulose material

FIELD: textile, paper.

SUBSTANCE: method for the production of an antimicrobial silver-containing cellulosic material is claimed, comprising the treatment of a cellulose-containing material with a previously prepared aqueous dispersion of silver particles, followed by dehydration and drying. Wherein the dispersion of silver nanoparticles with the silver concentration from 0.006 wt % to 0.06 wt % contains preparations not reducing the aggregative stability of the silver particles, namely, gelatine, a cation-active polyelectrolyte, e.g. chlorhexidine, miramistin, a preparation based on polyhexamethylenguanidine hydrochloride or quaternary ammonium compounds, and a reductant, e.g. sodium tetrahydroborate or alkaline solutions of starch. In addition, the aqueous dispersion of the silver particles may contain a film-forming compound, for example PVA, PVS.

EFFECT: increasing the efficiency of producing an antimicrobial cellulosic silver-containing material and ensuring its high biological activity during long operation after humid-heat treatments.

6 cl, 2 tbl, 26 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: claimed invention relates to method of tainting during washing by means of special flue or violet bis-azo dyes, separately or in combination with photocatalyst. Other objects of claimed invention represent composition, containing at least one photocatalyst and at least one of special bis-azo dyes. Composition in accordance with claimed invention is especially suitable for tainting fabrics during washing. Other objects of claimed invention represent detergent composition, fabric-softening composition, containing said dyes or mixtures of said dyes and photocatalysts, and new blue or violet bis-azo dyes.

EFFECT: reduction of dye accumulation on fabric after several washing cycles.

15 cl, 3 tbl, 36 ex

FIELD: textiles, paper.

SUBSTANCE: invention can be used in the textile industry for production of antimicrobial argentiferous cellulosic materials. The method of production of antimicrobial argentiferous cellulosic material comprises processing of the cellulose matrix by the aqueous dispersion of the silver particles for 10-60 sec, obtained by mixing an alkali extract of bast fibres with an aqueous solution of silver nitrate and keeping this mixture at a temperature of 50-95°C for 10-90 min.

EFFECT: invention enables to reduce loss of the active components, to reduce the time and energy consumption during production of antimicrobial materials and also to improve the quality of the processed nonwoven material and environmental safety.

4 cl, 2 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to technology of production of antimicrobial copper-containing cellulose materials and can be used in the textile industry. A cellulose matrix is processed with water dispersion of copper particles with their concentration of 0.025-1.28 wt %. Dispersion is obtained by mixing an alkaline extract of bast fibres with a copper salt solution and with a reductant solution and standing of the said mixture at a temperature from room to 95°C for 10-60 min. A concentration of the alkaline extract of the bast fibres in the dispersion constitutes 10-80 wt %. Processing the cellulose material with water dispersion of copper particles is carried out by impregnation or aerosol application. As the reductant used are taken separately or in a combination with each other compounds, selected from the group of reductants, capable of reducing copper ions, for instance, sodium borohydride, rongalite, sodium thiosulphate, hydrazine sulphate. As the copper salt, copper sulphate, chloride, acetate or nitrate is used. In obtaining water dispersion of copper particles a ratio of the reductant and the copper salt concentrations constitutes 1:1-1:2.5.

EFFECT: application of the invention makes it possible to increase efficiency of obtaining the antimicrobial copper-containing cellulose material, quality of processed the non-woven material and ecological safety.

4 cl, 2 tbl, 9 ex

FIELD: textiles, paper.

SUBSTANCE: method is characterised by applying on the surface of the complex aramid thread of the processing composition comprising mineral heat resistant odorless oil with a flash point not less than 180°C; a mixture of fatty acid ether and oxyethylated fatty alcohol as emulsifier, alkylpolyoxyethylene phosphate an antistatic agent and a preservative to protection from biological damage with the following ratio of components, wt %: heat-resistant oil - 45-60, a mixture of fatty acid ether and oxyethylated fatty alcohol - 20-30, alkylpolyoxyethylene phosphate - 19.93-24.9, preservative 0.07-0.1. The ratio of fatty acid ether and oxyethylated fatty alcohol in the mixture is 4:1. The derivatives of isatiozolones and oxalidines are used as preservative.

EFFECT: increase in electrical conductivity properties, protection against biological damage while maintaining high physical and mechanical properties of aramid threads and exclusion of irritating odor.

4 dwg, 1 tbl

FIELD: machine building.

SUBSTANCE: along the slot there is a through-hole for connection pipe interconnected with slot with diameter larger than connection pipe diameter. The connection pipe has longitudinal slotted hole and arranged in such a way that longitudinal slotted hole is diametrically opposite the tank slot (slots). At the face ends of longitudinal slotted hole there are mounted shut-off glands tightly contacting the walls of tank through-hole. One end of connection pipe is equipped with fitting for binding substance supply in it, the other is plugged or also equipped with fitting for binding substance supply in it, note that connection pipe casing and the internal surface of through-hole for it form two channels limited by shut-off glands for binding substance passing. In case there are two slots in the tank the latter have equal width and are located with shift, and if there are not less than three slots in the tank, the latter also have equal width and are arranged in staggered order. There are heating elements installed on tank housing.

EFFECT: invention allows provision of qualitative processing of moving fibre material of different width, binding substances of different viscosity and quick-response binding agents.

4 cl, 16 dwg

FIELD: textile, paper.

SUBSTANCE: invention is referred to decorative works of textile industry. Device for polychrome painting of fabrics contains chamber with openings for fabric inlet and outlet in stretched edgewise form, re-rollers and pull-out rollers, squeeze rolls and radiation thermal chamber. In addition, this device is provided with feeder for soft capsules with staining solution. Feeder is installed so that it can supply capsules to squeezed locks bit. Device also comprises device for collecting and/or removal squeezed capsules. Radiation thermal chamber is located between squeeze roll and pull-out roll. Brush roll is situated under pull-out roll.

EFFECT: manufacture of simple device capable of random patterns of unlimited colour painting.

3 cl, 1 dwg

FIELD: textile, paper.

SUBSTANCE: invention is referred to decorative works in textile industry. Device for dye application to fabric contains a pair of shafts for fabric passing-through in stretched edgewise form, aerodynamic circuit consisting of fan, air duct and nozzle. In addition, aerodynamic circuit includes stationary diffuser and convergent nozzle being opposite to diffuser and having round platform in its wide part. There is at least one opening in round platform for air inlet. Diffuser and convergent nozzle are installed with clearance sufficient for fabric passing between them. Convergent nozzle can be rotated, and nozzle is connected to dye power and/or nano-powder supplying unit. Platform is removable.

EFFECT: manufacture of simple device capable to form pattern such as spiral (spirals) of different configuration.

2 cl, 2 dwg

FIELD: biocide agents.

SUBSTANCE: method of invention related on the whole to finishing of textile materials. Textile materials, including textile museum exhibits, are impregnated with solution of biocidal alkoxysiloxane derivative of 3,6-dichloro-2(4-hydroxyphenoxy)pyridine in organic solvent or aqueous emulsion. Material is then dried at 140-150°C for 3-5 min or kept at ambient temperature for 24 h. Impregnation with above solutions is conducted in presence of γ-aminopropyltriethoxysilane.

EFFECT: imparted moisture-resistant bioprotective properties to textile materials made from various fibers, including colored fibers.

2 cl, 1 dwg, 4 tbl

The invention relates to textile production and allows to improve the performance of irrigation equipment and to improve the treatment quality of the sample of fibrous material through the intensification of the process in the field of microwave energy

The invention relates to the textile industry and can be used in preparatory departments weaving production when dressing cotton yarn of viscose staple yarn and yarn from cotton blend with viscose Mylar or nylon fiber with dominant content in the mixture of cotton fiber

FIELD: chemistry.

SUBSTANCE: first step includes obtaining low-hydroxylated insoluble fullerenols by reacting concentrated fullerene solution in o-xylene with aqueous ammonia solution in the presence of a tetrabutylammonium hydroxide phase-transfer catalyst at 35-40°C. At the second step, the obtained low-hydroxylated insoluble fullerenols are hydroxylated to transform them into a water-soluble form by mixing with 6-15% aqueous hydrogen peroxide solution and heating for 4-5 hours at 65°C. Water-soluble fullerenols are then precipitated from an alcohol-containing solution.

EFFECT: simplifying the method while preserving quality characteristics and full extraction of the end product.

2 cl, 1 dwg, 4 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to nanotechnology, particularly a method of producing aspirin nanocapsules in a carrageenan envelope. The disclosed method includes preparing an aspirin suspension in benzene; dispersing the obtained mixture into a carrageenan suspension in butanol in the presence of an E472c preparation while mixing at 1000 rps; adding tetrachloromethane; filtering the obtained nanocapsule suspension and drying at room temperature.

EFFECT: method provides a simpler and faster process of producing nanocapsules and increases mass output.

1 dwg, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to encapsulation, particularly to a method of producing albendazole nanocapsules in a sodium alginate envelope. The disclosed method includes adding albendazole to a sodium alginate suspension in hexane in the presence of an E472c preparation while mixing at 1000 rps. The weight ratio of albendazole and sodium alginate is 1:3 or 3:1. Further, 1,2-dichloroethane is added. The obtained suspension of nanocapsules is filtered, washed and dried. The process of producing the nanocapsules is carried out at 25°C for 20 minutes.

EFFECT: invention provides a simpler and faster process of producing nanocapsules, reduces losses during production thereof (high mass output).

3 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to encapsulation, particularly a method of producing resveratrol nanocapsules in an envelope made of low- or highly esterified apple or citrus pectin. According to the disclosed method, resveratrol is dispersed in a suspension of low- or highly esterified apple or citrus pectin in benzene in the presence of an E472c preparation while stirring at 1000 rps. Tetrachloromethane is then added. The obtained suspension of nanocapsules is filtered and dried. The process of producing the nanocapsules is carried out at 25°C for 10 minutes.

EFFECT: invention provides a simpler and faster process of producing nanocapsules, reduces losses during production thereof (high mass output).

9 ex, 1 dwg

FIELD: nanotechnology.

SUBSTANCE: according to the invention method, albendazole is added to the suspension of sodium alginate in butanol in the presence of the preparation E472s when stirring at 1000 revolutions per second. The mass ratio of albendazole and sodium alginate is 1:3 or 3:1. Then acetonitrile is added. The resulting suspension of the nanocapsules is filtered, washed, and dried. The process of production of nanocapsules is carried out at 25°C for 20 min.

EFFECT: simplification and acceleration of the process of production of nanocapsules, reduction of losses in their production.

1 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: according to the method a suspension of resveratrol in heptane was dispersed into a suspension of xanthan gum in butanol in the presence of E472c under stirring at the rate of 1000 rev/s. A mixture of benzene and water taken at a volume ratio of 5:1 or 3:1 was added to the said suspension. The resulted suspension of nanocapsules was filtered, washed and dried. The process was performed at a temperature of 25°C within 10 min.

EFFECT: simplified and fast process of nanocapsule production, reduced process losses.

4 ex, 2 dwg

FIELD: nanotechnology.

SUBSTANCE: suspension of aspirin in benzene is produced. The resulting mixture is dispersed into suspension of sodium alginate in butanol in the presence of the preparation E472s when stirring at 1000 rpm/sec. Then chloroform is poured, the resulting suspension of nanocapsules is filtered and dried at room temperature.

EFFECT: simplification and acceleration of the process of production of the nanocapsules, and increase in the yield by weight.

1 dwg, 4 ex

FIELD: medicine.

SUBSTANCE: invention represents a method for preparing a sterile nanoemulsion of perfluororganic compounds (PFOC) involving: adding a PFOC mixture to an aqueous solution of a stabilising agent; homogenising the PFOC mixture with the aqueous solution of the stabilising agent to produce a PFOC pre-emulsion; mixing the PFOC pre-emulsion with a salt-water solution to produce the PFOC nanoemulsion; keeping the PFOC nanoemulsion at a temperature from 2 to 10°C for at least 18 hours. The method can be also implemented as follows: pre-filling a circulation loop of a PFOC nanoemulsion generating plant with the aqueous solution of the stabilising agent; adding the PFOC mixture to the aqueous solution of the stabilising agent; homogenising the PFOC mixture with the aqueous solution of the stabilising agent to produce the PFOC pre-emulsion; mixing the PFOC pre-emulsion with the salt-water solution to produce the PFOC nanoemulsion.

EFFECT: higher stability of the PFOC emulsion and prolonging the storage life.

30 cl, 7 ex, 5 tbl, 1 dwg

FIELD: nanotechnology.

SUBSTANCE: shell of the nanocapsules is used as apple or citrus high- or low-esterified pectin, and the core - as L-arginine. According to the inventive method, L-arginine is suspended in benzene, the resulting mixture is dispersed into a suspension of apple or citrus high- or low-esterified pectin in benzene in the presence of the preparation E472s while stirring 1000 revolutions per second. Then carbon tetrachloride is added, the resulting suspension of the nanocapsules is filtered and dried at room temperature. The process is carried out for 15 minutes.

EFFECT: simplification and acceleration of the process of producing the nanocapsules, and increase in the yield by weight.

6 ex

FIELD: nanotechnology.

SUBSTANCE: method of production of nanocapsules of vitamin in sodium alginate is characterized in that the shell is used as sodium alginate, and the core - as the vitamin, in a weight ratio of core:shell as 1:3. According to the method of preparing the nanocapsules the vitamin is added to a suspension of sodium alginate in benzene in the presence of the preparation E472s while stirring at 1300 rev/sec. Then hexane is added, the resulting suspension is filtered and dried at room temperature.

EFFECT: simplification and acceleration of the process of production of the nanocapsules, and increase in the yield by weight.

3 dwg, 8 ex

FIELD: carbon materials.

SUBSTANCE: weighed quantity of diamonds with average particle size 4 nm are placed into press mold and compacted into tablet. Tablet is then placed into vacuum chamber as target. The latter is evacuated and after introduction of cushion gas, target is cooled to -100оС and kept until its mass increases by a factor of 2-4. Direct voltage is then applied to electrodes of vacuum chamber and target is exposed to pulse laser emission with power providing heating of particles not higher than 900оС. Atomized target material form microfibers between electrodes. In order to reduce fragility of microfibers, vapors of nonionic-type polymer, e.g. polyvinyl alcohol, polyvinylbutyral or polyacrylamide, are added into chamber to pressure 10-2 to 10-4 gauge atm immediately after laser irradiation. Resulting microfibers have diamond structure and content of non-diamond phase therein does not exceed 6.22%.

EFFECT: increased proportion of diamond structure in product and increased its storage stability.

2 cl

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