41results about How to "Wide range of practical applications" patented technology

The invention discloses a method for preparing an orientated-state polylactic acid profile. The method comprises the following steps of 1, conducting injection molding on dried polylactic acid raw materials through an injection molding machine, so that a billet material is obtained, or heating and pressurizing the polylactic acid raw materials, so that the polylactic acid raw materials are made into the billet material through forging; 2, conducting oriented intensification on the billet material obtained in step 1, wherein extrusion or forging is adopted as the oriented intensification method; and 3, conducting cooling and quenching on the billet material obtained in step 2, so that after the billet material is stabilized, the profile is formed. According to the method for preparing the orientated-state polylactic acid profile, technological parameters for preparing the polylactic acid profile are controlled, so that the orientation effect of polylactic acid molecules and a crystalline region is improved to the greatest extent; and the unexpected technical effect is gained, and thus the polylactic acid profile which is excellent in mechanical performance is obtained. The orientated-state polylactic acid profile prepared through the method is stable in performance, healthy, harmless and good in biocompatibility.

The invention relates to a molybdenum sulfide / polypyrrole / polyaniline ternary composite material as well as a preparation method and application thereof. According to the molybdenum sulfide / polypyrrole / polyaniline ternary composite material, a polypyrrole nano coating layer and polyaniline nanoparticles are grown on molybdenum sulfide nanosheets in situ. The preparation method comprises the following steps: performing ultrasonic peeling on a solution so as to obtain molybdenum sulfide nanosheets, performing ultrasonic dispersion so as to obtain a molybdenum sulfide nanosheet dispersion liquid, adding an acid solution dispersion liquid of a pyrrole monomer, performing in-situ polymerization in an ice water bath, washing, drying so as to obtain a molybdenum sulfide / polypyrrole composite material, performing ultrasonic dispersion so as to obtain a molybdenum sulfide / polypyrrole dispersion liquid, adding an acid solution dispersion liquid of aniline, performing in-situ polymerization in the ice water bath, washing, and drying, thereby obtaining the molybdenum sulfide / polypyrrole / polyaniline ternary composite material. The molybdenum sulfide / polypyrrole / polyaniline ternary composite material is simple in preparation process, easy to operate and low in reaction temperature, and can be used as an ideal electrode material of a new energy device such as a high-performance super-capacitor and a lithium ion battery.

The invention belongs to the field of composite membrane preparation and relates to a method for preparing a composite fiber membrane, in particular to a method for preparing a cellulose-reinforced nano-composite fiber membrane by electrostatic spinning, aiming to solve the problems that a PMMA (polymethyl methacrylate) fiber membrane prepared by an existing method is difficult to form, poor in thermal stability and poor in nonpolar PMMA and polar CNC (cellulose nanocrystal) compatibility. The method includes firstly, preparing CNC water suspension; secondly, preparing electrostatic spinning liquid; thirdly, filling an injector with the electrostatic spinning liquid and performing electrostatic spinning so as to obtain the cellulose-reinforced nano-composite fiber membrane. Fibers prepared by the method are smooth in surface and uniform in diameter; along with increase of CNC addition amount, the fiber diameters are decreased gradually and are narrowed in distribution, and a TGA (thermal gravity analysis) curve of nano-composite fibers moves towards a high temperature direction, so that thermal properties of the nano-composite fibers are enhanced. The maximum tensile strength of the prepared fiber membrane can reach 0.3MPa.

The invention relates to a molybdenum sulfide / nickel oxide composite material and a preparation method and application thereof. The structure of the composite material is that a nickel oxide nanosheet grows on a molybdenum sulfide nanosheet. The preparation method comprises the steps of dispersing the molybdenum sulfide nanosheet into a polar solvent and carrying out ultrasonic treatment to obtain a molybdenum sulfide nanosheet dispersion liquid; dissolving a nickel salt into the molybdenum sulfide nanosheet dispersion liquid, carrying out ultrasonic treatment to obtain a mixed liquid, adding a complexing agent, reacting at 80-100 DEG C for 6-24 hours and washing and drying the product to obtain a molybdenum sulfide / nickel hydroxide composite material; and carrying out thermal treatment to obtain the molybdenum sulfide / nickel oxide composite material. The preparation process is simple and easy to operate, the reaction temperature is low, the security coefficient is high, and the prepared molybdenum sulfide / nickel oxide composite material can be used as an excellent electrode material for new energy devices of a high-performance super-capacitor, a lithium battery and the like.

The invention discloses a signal instantaneous frequency estimation method, and relates to the technical field of signal processing methods. The method comprises the following steps: inputting a signal and initializing each variable; performing two-dimensional search on the i-th signal to obtain an optimal parameter, and extracting instantaneous frequency estimation of the i-th signal under the optimal parameter; solving the time domain representation of the i-th signal, and subtracting the i-th signal from the original signal to obtain the remaining (i+1)-th signal; repeating the above stepsuntil the energy of the remaining components is less than a set threshold value; and finally, adding the obtained instantaneous frequency estimation of the components to realize instantaneous frequency estimation of the multi-component non-stationary signal. The method provided by the invention not only has adaptability to the number of signal components and relatively strong noise robustness, butalso improves the signal time-frequency distribution energy aggregation and instantaneous frequency estimation precision.

The invention belongs to the field of natural active materials and particularly relates to an extraction method of anthocyanin ingredients. The extraction method includes the steps of 1), extracting raw materials containing the anthocyanin ingredients with ethyl alcohol, and performing alcohol yeast on an extracting solution and then centrifugal filtration to collect a filtrate; 2), extracting the filtrate to obtain the anthocyanin ingredients after filtration. Compared with the prior art, the extraction method has the advantages that the anthocyanin ingredients high in content contain effective components of compound alkaloid, superoxide dismutase and the like and have better therapeutic effect on various tumors and cancers, stroke cardiovascular disease, diabetes, leucoderma, scales disease and cerebral palsy, and blocking of cell tumor variation and caner cell mutation gene variation which are caused by fluid-circulating lymph can be effectively improved.

The invention belongs to the technical field of zinc oxide nanorod array preparation, and particularly relates to a large-area preparation method for a zinc oxide nanorod array with good orientation and high compactness, which comprises the following steps of preparing a sol, cleaning a substrate, dip-coating and carrying out crystallizing heat treatment. The invention adopts a sol-gel method to directly prepare the zinc oxide nanorod array with good orientation and high compactness on the substrate in a large area without a catalyst or a template, greatly lowers actual production cost and improves process repeatability. The invention can solve the problems of high cost, adoption of the catalyst and the template or a gas-phase zinc oxide transition layer to aid growth, poor production repeatability and the like in existing zinc oxide nanorod array production methods. By using a simple method, the invention directly grow the zinc oxide nanorod array with an ordered array, a uniform structure and high compactness on the substrate in a large area, and the draw ratio of the zinc oxide nanorod is effectively controlled through adjusting dip-coating speed.

The invention relates to the field of compound extraction and in particular relates to an extraction method of purple sweet potato anthocyanin. The extraction method is characterized by comprising thefollowing steps: a, adding a metal salt solution, 1-ethyl-3-methylimidazole acetate and 1-ethyl-3-methylimidazole diethyl phosphate into purple sweet potato slurry, and uniformly mixing; carrying outultrasonic and microwave cooperative treatment for 5 to 10 min; then carrying out microwave extraction for 5 to 15 min; carrying out de-coloring and clarificationimpurity removal on an extracting solution, and taking supernatant; concentrating and drying the supernatant to obtain extract; b, carrying out centrifugal separation on the extract and collecting filtrate; concentrating and drying the filtrate to obtain purple sweet potato anthocyanin extract. Compared with the prior art, the extraction method of the purple sweet potato anthocyanin has the advantages of simple technology and convenience for operation; the prepared anthocyanin has the characteristics of high extraction rate, high purity and the like and has very good popularization and application value.

The invention provides a tool for quickly forming radial temperature gradient distribution. The tool comprises a circular bottom part, a heat transfer body, a circular working platform, a heat-insulation layer, a quartz substrate, heat-conducting silicone grease and the like. The horizontal circular bottom part is used for connecting with a heat source for providing constant temperature; the heattransfer body achieves dynamic temperature balance through a heat-conducting characteristic of the heat transfer body and heat exchange between the heat transfer body and an external environment; theheat-insulation layer is adopted on the side face for insulating heat and preserving heat; the temperature endowed for the circular working platform is uniformly distributed in the circumferential direction and distributed in a certain temperature gradient way in the radial direction; and in order to reduce contact thermal resistance, the quartz substrate and the working platform form surface contact through the heat-conducting silicone grease, and the temperature finally endowed for the surface of the quartz substrate is uniformly distributed in the circumferential direction and distributed in a certain temperature gradient way in the radial direction. The tool for quickly forming radial temperature gradient distribution provided by the invention can quickly realize radial temperature continuous gradient distribution of the circular horizontal substrate, and is controllable in temperature distribution and convenient and reliable to operate.

The invention discloses a fatty acid / SEBS stretchable composite film with enhanced triboelectric output, its preparation method and application. The stretchable composite film contains two materials of fatty acid and SEBS, and is simple to operate and easy for large-scale industrial production prepared by the solution scraping process. Among them, compared with the functional groups constituting SEBS, the COOH group in fatty acid has higher electronegativity; the introduction of fatty acid can change the triboelectricity and charge retention ability of SEBS film, thereby greatly improving the triboelectric nanogenerator. output performance. Compared with the triboelectric nanogenerator based on the pure SEBS stretchable film triboelectric pair, the output performance of the triboelectric nanogenerator based on the fatty acid / SEBS stretchable composite film triboelectric pair developed by the present invention can reach up to 3.28 times. In addition, the fatty acid / SEBS stretchable composite film developed in the present invention also has excellent flexibility, stretch recovery, and transparency.

The invention discloses a method for preparing oriented polylactic acid profiles, which comprises the following steps: 1) Injecting dried polylactic acid raw materials through an injection molding machine to make blanks or heating and pressing polylactic acid raw materials to form blanks by forging ; 2) performing orientation strengthening on the embryo material obtained in step 1), and the orientation strengthening method is extrusion or forging; 3) cooling and quenching the embryo material obtained in step 2), and forming a profile after the embryo material is stabilized. By controlling the process parameters for preparing polylactic acid profiles, the orientation of polylactic acid molecules and crystal regions is improved to the greatest extent, and unexpected technical effects are achieved, thereby obtaining polylactic acid profiles with excellent mechanical properties. The oriented polylactic acid profile prepared by the invention has stable properties, is healthy and harmless, and has good biocompatibility.

The application discloses a method for extracting anthocyanins. The method for extracting anthocyanins in this application includes using roselle as a raw material, chopping the raw material to 5-10 mesh, and using pure water and adding a compound enzyme preparation to enzymatically process the chopped raw material under the condition of 45-55°C. Extraction, the extract is sequentially centrifuged, ultrafiltered, concentrated by reverse osmosis, purified by macroporous adsorption resin, and freeze-dried to obtain high-purity anthocyanins; the compound enzyme preparation includes cellulase and pectinase. The anthocyanin extraction method of the present application has a simple process and is easy to operate, and has a high extraction rate of anthocyanin, relatively saves production costs, and has higher economic value. The anthocyanins extracted by the method of the application have a purity of more than 70%, so that the extracted anthocyanins have higher medical value and wider practical application fields. Moreover, the method of the present application avoids organic solvent residues, reduces environmental pollution, and has better social benefits.

The invention relates to the field of compound extraction and in particular relates to an extraction method of purple sweet potato anthocyanin. The extraction method is characterized by comprising thefollowing steps: a, adding a metal salt solution, 1-ethyl-3-methylimidazole acetate and 1-ethyl-3-methylimidazole diethyl phosphate into purple sweet potato slurry, and uniformly mixing; carrying outultrasonic and microwave cooperative treatment for 5 to 10 min; then carrying out microwave extraction for 5 to 15 min; carrying out de-coloring and clarificationimpurity removal on an extracting solution, and taking supernatant; concentrating and drying the supernatant to obtain extract; b, carrying out centrifugal separation on the extract and collecting filtrate; concentrating and drying the filtrate to obtain purple sweet potato anthocyanin extract. Compared with the prior art, the extraction method of the purple sweet potato anthocyanin has the advantages of simple technology and convenience for operation; the prepared anthocyanin has the characteristics of high extraction rate, high purity and the like and has very good popularization and application value.

The invention belongs to the field of composite membrane preparation and relates to a method for preparing a composite fiber membrane, in particular to a method for preparing a cellulose-reinforced nano-composite fiber membrane by electrostatic spinning, aiming to solve the problems that a PMMA (polymethyl methacrylate) fiber membrane prepared by an existing method is difficult to form, poor in thermal stability and poor in nonpolar PMMA and polar CNC (cellulose nanocrystal) compatibility. The method includes firstly, preparing CNC water suspension; secondly, preparing electrostatic spinning liquid; thirdly, filling an injector with the electrostatic spinning liquid and performing electrostatic spinning so as to obtain the cellulose-reinforced nano-composite fiber membrane. Fibers prepared by the method are smooth in surface and uniform in diameter; along with increase of CNC addition amount, the fiber diameters are decreased gradually and are narrowed in distribution, and a TGA (thermal gravity analysis) curve of nano-composite fibers moves towards a high temperature direction, so that thermal properties of the nano-composite fibers are enhanced. The maximum tensile strength of the prepared fiber membrane can reach 0.3MPa.

The invention provides a preparation method for rare earth and cobalt permanent magnetic particles with the high remanence ratio. According to the method, the low-temperature wet type ball milling technology is adopted; the melting point temperature of organic solvents is controlled to be under minus 50 DEG C; the ball milling temperature is higher than the melting point temperature of the organic solvents and lower than 0 DEG C; in the ball milling process, the mass ratio of ball materials is controlled to be 8:1-9.5:1; the ball milling time of every time is controlled to be within 1.5 minutes to 5 minutes, and the total ball milling time is controlled to be within one hour to ten hours; finally, the rare earth and cobalt permanent magnetic particles with the high nanoscale particle content, the high coercivity and the high remanence ratio are obtained. As a result, the overall performance of the rare earth and cobalt permanent magnetic particles is improved, and the practical application area of the rare earth and cobalt permanent magnetic particles is greatly expanded. In addition, the preparation method has the advantages of being low in cost and easy and convenient to operate and having good application prospects.

The invention relates to a molybdenum sulfide / nickel oxide composite material and a preparation method and application thereof. The structure of the composite material is that a nickel oxide nanosheet grows on a molybdenum sulfide nanosheet. The preparation method comprises the steps of dispersing the molybdenum sulfide nanosheet into a polar solvent and carrying out ultrasonic treatment to obtain a molybdenum sulfide nanosheet dispersion liquid; dissolving a nickel salt into the molybdenum sulfide nanosheet dispersion liquid, carrying out ultrasonic treatment to obtain a mixed liquid, adding a complexing agent, reacting at 80-100 DEG C for 6-24 hours and washing and drying the product to obtain a molybdenum sulfide / nickel hydroxide composite material; and carrying out thermal treatment to obtain the molybdenum sulfide / nickel oxide composite material. The preparation process is simple and easy to operate, the reaction temperature is low, the security coefficient is high, and the prepared molybdenum sulfide / nickel oxide composite material can be used as an excellent electrode material for new energy devices of a high-performance super-capacitor, a lithium battery and the like.

The invention relates to a preparation method of blueberry anthocyanins with high bioavailability. The method comprises the following steps: preparation of blueberry anthocyanin solution, glycosidase-catalyzed conversion of blueberry anthocyanin, membrane separation of blueberry anthocyanin conversion product, separation of blueberry anthocyanin in permeate, high bioavailability Drying and preservation of blueberry anthocyanins. Beneficial technical effects are: (1) Enzyme-catalyzed reaction is carried out by using a membrane reactor integrating reaction and separation, which not only improves the use efficiency of enzyme, reduces production cost, but also continuously discharges reaction products, reduces or even eliminates reaction The inhibitory effect of the product on the enzyme improves the speed of the catalytic reaction; (2) The integrated membrane reaction system, reverse osmosis system, and extraction system prepare blueberry anthocyanins with high bioavailability, which is suitable for industrialization; (3) The present invention obtains High bioavailability The bioavailability of blueberry anthocyanins is higher than 60%, which has higher health care value and wider practical application fields.

The invention relates to a molybdenum sulfide / polypyrrole / polyaniline ternary composite material as well as a preparation method and application thereof. According to the molybdenum sulfide / polypyrrole / polyaniline ternary composite material, a polypyrrole nano coating layer and polyaniline nanoparticles are grown on molybdenum sulfide nanosheets in situ. The preparation method comprises the following steps: performing ultrasonic peeling on a solution so as to obtain molybdenum sulfide nanosheets, performing ultrasonic dispersion so as to obtain a molybdenum sulfide nanosheet dispersion liquid, adding an acid solution dispersion liquid of a pyrrole monomer, performing in-situ polymerization in an ice water bath, washing, drying so as to obtain a molybdenum sulfide / polypyrrole composite material, performing ultrasonic dispersion so as to obtain a molybdenum sulfide / polypyrrole dispersion liquid, adding an acid solution dispersion liquid of aniline, performing in-situ polymerization in the ice water bath, washing, and drying, thereby obtaining the molybdenum sulfide / polypyrrole / polyaniline ternary composite material. The molybdenum sulfide / polypyrrole / polyaniline ternary composite material is simple in preparation process, easy to operate and low in reaction temperature, and can be used as an ideal electrode material of a new energy device such as a high-performance super-capacitor and a lithium ion battery.