Method for obtaining fibrous material containing oxide nanoparticles from thermoplast melt

FIELD: chemistry.

SUBSTANCE: method, like the prototype, involves forming a fibrous material by laminating a melt of a thermoplastic polymer by the action of a gas stream containing solid particles. Particles penetrate into the surface layer of the softened material, and particle consolidation occurs, when the material passes into a solid aggregate state. New is that the formation of fibers occurs under the influence of an unheated gas stream containing oxide nanoparticles or small droplets of liquid, in which such nanoparticles having an ambient temperature are dispersed. Gas ejection is provided, in which an additional flow of unheated gas is generated around the jet of molten polymer fed. The particle size is less than 100 nm.

EFFECT: production of fibrous material with oxide nanoparticles fixed on its surface with one or, at least, two kinds, with minimal energy costs and simplification of the technological process.

2 dwg

 



 

Same patents:

FIELD: food industry.

SUBSTANCE: protein produced of milk is plasticised together with a plasticiser at a temperature of 60°C - 140°C under mechanical stress conditions; then fibres are moulded by means of a draw die. The plasticiser is chosen from the group including a polysaccharide water solution, glycerine, ethylene glycol or these substances mixture.

EFFECT: produce fibres have significant tensile strength.

13 cl, 1 tbl, 3 dwg, 1 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of nanofibres by electrostatic process. Spinning fibre-forming electrode designed to carry polymer solution or melt in electric field for fibre forming in devices intended for fibre forming by electrostatic process from said solutions or melts. Said electrode features elongated shape and comprises two end parts arranged at carrier. Fibre-forming elements made of string or wire bar are laid between said two parts. In compliance with this invention said fibre forming electrodes are inclined to axis of spinning of said electrode.

EFFECT: no sputter of polymer solution or melt.

8 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of several synthetic threads to be stretched and wound and to device to this end. Note here that synthetic threads are formed parallel with each other, cooled and tightened by extrusion of thin bundles of filaments. Note also that said threads are stretched as a bundle of threads are wound on reels. To allow identical physical conditions, threads after extrusion and before stretching are pulled off independently by separate godet wheels. This allows identical conditions of extrusion, cooling and stretching of every thread. Proposed device comprises several separate godet wheels arranged side by side and ahead of stretching device relative to one of the threads. To pull off a definite thread, said godet wheels can actuate an appropriate drive.

EFFECT: higher efficiency.

12 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: water composition contains in wt % 15-40 solution of interpolymeric complex, 50-80 aqueous solution of thickening agent (concentration 8 - 14%) and acidity regulator 2H HCl to pH=2 - 4. Interpolymeric complex is obtained by mixing 1% solution of polyacrylacid and 10% solution of polyvinyl alcohol with component ratio 1:1. As thickening agent, applied is polyvinyl alcohol or polyethylenoxide. Viscosity of composition constitutes from 0.5 to 0.9 Pa·s.

EFFECT: application of claimed spinning composition makes it possible to obtain fibres with diameter 200 - 400 nm with high indicators of hygroscopicity and steam-permeabilityat quite fast rate.

1 tbl, 3 ex

FIELD: process engineering.

SUBSTANCE: invention relates to production of strands of composite material by combining continuous glass fibers with continuous fibers of organic high-shrinkage material used as reinforcing material. Thermoplastic fibers, stretched and heated to softening point, are thrown on revolving drum 17 at the rate exceeding operating rpm of said drum. Web 10 of said thermoplastic fibers are mixed on drum surface with glass fiber bundle or web 2 to make composite material strand. Said drum 17 has multiple holes and element 19 dividing drum inside into, at least, two compartments, one with rarefaction to keep thermoplastic fibers in initial crimp state and another one with increased pressure to separated web from drum surface. Produced strand features uniform distribution of fibers and stable properties.

EFFECT: composite material with liner glass fibers and crimped thermoplastic fibers.

8 cl, 2 dwg

FIELD: polymer chemistry.

SUBSTANCE: invention refers to the devices for thread cooling during formation of thermoplastic materials for manufacturing of monofiber thread of fleece or fiber out of polymer materials, i.e. polypropylene. The device includes tank (1) made with possibility of running water supply and elements (2) of thread direction with cuts (3) for thread placements. The elements (2) of thread direction are made of elastic hygroscopic material and are established with possibility of filling the material with water from the tank (1) for thread cooling. The cuts (3) for thread placement are made as cuts in elastic hygroscopic material.

EFFECT: decrease of defects due to reduced probability of thread tearing during cooling with decreased size of cooling unit.

6 cl, 2 dwg

FIELD: machine-building industry.

SUBSTANCE: device comprises a shaping device, treatment device and pick-up device which are stacked one above the other making a number of positions for one or several filaments production on each of the devices along longitudinal side of the machine. Besides, the platform of provided for process positions servicing. It is located along longitudinal side of the machine at the level between treatment device and pick-up device so that all necessary filament charging operations or device service operations could be done.

EFFECT: improved maintainability of device and reduced number of man-hours.

10 cl, 5 dwg

FIELD: textile, paper.

SUBSTANCE: method for fibrous material production consists in short-term treatment of polystyrene or its wastes in reactor with air or steam and air mixture with steam content of 50% vol. at the temperature of 90-120°C, pressure of 3 MPa for 30 seconds.

EFFECT: simple, efficient and ecologically pure method is developed for production of fibrous material from polystyrene or its wastes with high yield and good sorption properties.

9 ex, 1 tbl

FIELD: machine building.

SUBSTANCE: line consists of extruder, of unit of first broach, of device for thread cooling, of thread directing elements, of unit of second broach and of cut-off mechanism. Also, the line consists of a directing support element. The cut-off mechanism is positioned behind the support element. The thread cooling device is installed between the unit of the first and the second broach. Thread is laced-up S-like into upper and lower rollers in the first unit of broach. The upper roller is driven. The elements of thread direction in the device of thread cooling transfer thread in linear motion through the unit of the second broach and the directing support element to the cut-off mechanism.

EFFECT: arrangement of compact lines of high efficiency for fabrication of qualitative fibre.

12 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: installation is designed for production of fibres out of thermo-plastic by means of supplying polymer melt and/or mixtures of polymers inside heated rotating fiberisator, in forming and simultaneous pulling fibres from jets of melt. The installation consists of an extruder, fiberisator, transporter for fibre collection, system for control and adjustment of temperature in the fiberisator; the system includes an optical pyrometre, power source and inductor. Notably, the rotating vertically installed fiberisator heated from the inductor is made in form of a cylinder with internal surface formed with a truncated cone, where angle between a shaft axis and an internal wall of the fiberisator is not less 30° and not more 35°, and with a lower truncated cone of the fiberisator where angle between a vertical axis of the fiberisator and cone generatrix is 45-60°. In a bottom part of the fiberisator and along circumference there are made openings; melt of thermo-plastic material flows via the openings under effect of centrifugal forces at fiberisator rotation. Angle of incline of secant flow of air from the opening of the inductor relative to vertical axis of the fiberisator is not less 10° to facilitate air flow directing formed fibre to a side opposite to the fiberisator. Diametre of produced fibre is adjusted by velocity of rotation and temperature of fiberisator walls, while output is determined with diametre and number of the openings in the fiberisator.

EFFECT: upgraded quality and physical-mechanical properties of produced fibre and reduced losses of source raw material due to destruction.

4 cl, 3 dwg, 1 tbl

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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