21 results about "Vacuum drying" patented technology

The invention relates to a battery technology, in particular to a solid sodium battery electrolyte and a preparation and an application thereof. The electrolyte is a carbonic ester polymer, a sodium salt and a porous support material, wherein the thickness of the electrolyte is 20-600 microns; the ionic conductivity is 1*10<-5>S/cm to 1*10<-3>S/cm; and an electrochemical window is greater than 3.6V. The preparation comprises the following steps: dissolving the carbonic ester polymer and the sodium salt into a solvent at a certain ratio; preparing a film on the porous support material; and carrying out vacuum drying to obtain the solid sodium battery electrolyte material. The assembled solid sodium battery is good in rate capability and has excellent long-cycle stability; and no electrolyte is added, so that the safety is high. The main body material is the carbonic ester polymer, so that the price is low; and the cost is low. The solid sodium battery electrolyte material is simple to prepare.

The invention relates to super-hydrophobic film materials and provides a super-hydrophobic polypropylene film and a preparation method thereof. The super-hydrophobic polypropylene film is characterized in that an isotactic polypropylene-b-polyethylene glycol diblock copolymer serves as a surface modifier to construct a micronano composite structure on the surface of the polypropylene film. The preparation method includes steps: dissolving the isotactic polypropylene-b-polyethylene glycol diblock copolymer in an alkane solvent to obtain a polymer solution, coating to the surface of the polypropylene film by spin coating, putting the polypropylene film subjected to surface modification into a vacuum drying oven, and performing vacuum drying to obtain the super-hydrophobic polypropylene film. The super-hydrophobic polypropylene film and the preparation method thereof have advantages that simplicity in operation is achieved, complex chemical treatment is avoided, and expensive equipment is not needed; the preparation method is high in efficiency, feasible, environment friendly, low in cost and easy for industrialization; the prepared super-hydrophobic polypropylene film has excellent surface structural stability.

The invention discloses a preparation method of water-soluble sodium cellulose sulfate with high substituting degree, which comprises the following steps: 1) a reactor is added with concentrated sulphuric acid, slowly dropped with alcohol, stirred for reaction; the molar ratio of alcohol and concentrated sulphuric acid is 1: 1.8 to 2.8 and alcohol and concentrated sulphuric acid are mixed evenly to be made into a sulfonating agent; 2) the sulfonating agent is added with cellulose to form a non-homogeneous reacting system, stirred for reaction and washed by alcohol, thus obtaining sodium cellulose sulfate, wherein, the mass ratio of the sulfonating agent and the cellulose is 20 to 50: 1; 3) the sodium cellulose sulfate is added into water, the pH value is adjusted to 8 to 10 by using the solution of sodium hydroxide, the solution of the sodium cellulose sulfate is obtained through filteration; 4) ethanol is added into the solution of the sodium cellulose sulfate, centrifugal separation or filtering is carried out to obtain sodium cellulose sulfate precipitate which goes through vacuum drying, thus acquiring sodium cellulose sulfate. The sodium cellulose sulfate prepared by the invention has the advantages of relatively high substituting degree, little cellulose molecule degradation, relatively large molecule weight, etc., and has certain antibacterial and antivirus properties proven by research results.

The invention discloses a preparation method for vacuum drying of transglutaminase. The preparation method comprises the following steps of: adding a heat protectant in fermentation broth of the transglutaminase; standing the mixed solution at room temperature; carrying out high-speed freezing and centrifuging on the mixed solution to obtain supernate; precipitating the fermentation broth with 95 percent ethanol; carrying out high-speed freezing and centrifuging on the precipitated solution to obtain a precipitate; adding an antioxidant protectant; and carrying out uniform mixing and vacuum drying to obtain an transglutaminase preparation. The transglutaminase obtained by using the preparation method disclosed by the invention has greatly-improved stability.

The invention provides natural bamboo fibers modified by nano-cellulose whiskers and a preparing method of the natural bamboo fibers. The preparing method specifically comprises the following steps that fresh bamboos are cut off and sliced into bamboo chips, the bamboo chips are steeped into an alkali solution containing cellulase, boiled, taken out, rolled and spin-dried, and pretreated bamboo fibers are obtained; the pretreated bamboo fibers are put into a steam explosion treatment device for steam explosion treatment, taken out, washed with water and filtered, bamboo fiber bundles are obtained, and long natural bamboo fibers and short natural bamboo fibers are obtained through combing; the short natural bamboo fibers are put into an acetic acid solution, ultrasonic crushing is carried out, and a cellulose whisker solution is formed; the long natural bamboo fibers are combed and twisted to form initial-spun fibers, then the initial-spun fibers are steeped into the cellulose whisker solution, ammonium hydroxide is dropwise added, the initial-spun fibers are taken out and subjected to vacuum drying, and the natural bamboo fibers modified by nano-cellulose whiskers are formed.

The invention discloses a suppository for treating haemorrhoids, and belongs to external traditional Chinese medicines for treating haemorrhoids. The suppository is prepared from golden cypress, scutellaria baicalensis, gallnuts and radix sophorae flavescentis by the following steps: 1) adding the golden cypress into ethanol 8 times by weight, carrying out reflux extraction three times, and concentrating the filtrate to obtain golden cypress concentrated liquor; 2) decocting the scutellaria baicalensis for 10 minutes by boiled water 14 times by weight of residual three medicinal materials, adding the gallnuts and the radix sophorae flavescentis and decocting for 2 hours, and filtering; 3) then, adding water 12 times by weight to decoct twice, combining the filtrates obtained by three times, and concentrating to obtain a fluid extract with relative density of 1.10-1.15; 4) adding ethanol into the fluid extract, standing for 18 hours, filtering and concentrating to obtain concentrated extracting liquor; 5) combining the concentrated extracting liquor and the golden cypress concentrated liquor, vacuum-drying and crushing to obtain medical powder; and 6) after uniformly mixing the medical powder with a matrix in a weight ratio of 4:6, carrying out injection moulding and cooling to obtain the suppository. The suppository disclosed by the invention has a good curative effect on hemorrhage, swelling, pains, constipation and the like caused by internal hemorrhoids, external hemorrhoids and mixed hemorrhoids, and is an external medicine for treating haemorrhoids.

The invention discloses a rapid baking method for a square lithium ion battery, which comprises the following steps of 1, in a preparation stage, vacuumizing a vacuum drying oven in which the square battery is placed to P0 for the vacuumizing time of t0, and then filling nitrogen to normal pressure, 2, in a preheating stage, preheating and drying the vacuum drying oven in which the square battery is placed, 3, in a heat and pressure maintaining stage, maintaining the vacuum degree P2 in the vacuum baking oven for the preheated battery, 4, in a circulation stage, repeating the step 3 for circulation times of X0, 5, in a nitrogen cooling circulation stage, filling nitrogen into the baking device to normal pressure, keeping the normal pressure for t3, and keeping the normal pressure for t4 under the vacuum degree P3, 6, repeating the step 5 for circulation times of X1, and 7, ending the baking. According to the method, air exchange operation is carried out in the vacuum drying oven before baking, the moisture content of gas in the oven body before baking can be removed, what is guaranteed is that the moisture content of the battery baking environment is low, and the performance of the battery is brought into play.

The invention relates to an active pure snake powder capsule and a preparation technique thereof. The invention adopts the technical scheme that the active pure snake powder capsule is prepared from Agkistrodon halys freeze-drying powder and black-tail snake freeze-drying powder according to the weight ratio of 2-3:1. The preparation technique comprises the following steps: delivering the washed Agkistrodon halys and the washed black-tail snake into a freezing dryer and freezing for 7-9 hours at negative 45 DEG C to negative 35 DEG C; starting a vacuum pump and heating to sublimate for 9-11 hours at 25-35 DEG C under a state of the vacuum degree of 1.3-13Pa; heating to sublimate for 11-13 hours at 55-65 DEG C; heating to sublimate for 9-11 hours at 75-85 DEG C; after vacuum drying, pulverizing the Agkistrodon halys and the black-tail snake coarsely by a roller respectively, then pulverizing finely and obtaining Agkistrodon halys freeze-drying powder and black-tail snake freeze-drying powder; and mixing the Agkistrodon halys freeze-drying powder and the black-tail snake freeze-drying powder evenly according to the weight ratio of 2-3:1, sieving with a sieve of 80 meshes and granulating a sieved substance by a capsule granulating machine after sterilizing by microwave. The invention can retain all the effective components of a snake, has curative effect to the three-high and is convenient to eat.

A preparing method of a Ag3PO4@Ag/carbon sphere ternary heterojunction composite material capable of selectively removing cationic dye is disclosed. The method includes subjecting a glucose solution having a mole concentration of 0.5 mol/L to a hydrothermal reaction in a hydrothermal reaction kettle at 180 DEG C for 5-8 h to obtain carbon spheres having an average diameter of 0.3-0.7 [mu]m; addingdropwise ammonia water having a concentration of 10-25 wt% into a AgNO3 solution having a concentration of 0.05-0.2 mol/L to prepare a transparent Tollens' reagent; adding the carbon spheres into theTollens' reagent with the mass ratio of the carbon spheres to the AgNO3 being 0.01-0.1:1 and stirring the mixture for 2-10 h; adding dropwise a Na2HPO4 solution into the mixture with the mole ratio of Ag<+> to PO<4><3-> being 3:1-10; reacting the mixture for 1-3 h; then performing centrifugation, filtration and washing; and drying a product in a vacuum drying oven at 50 DEG C to obtain the composite material. The composite material can rapidly and efficiently remove cationic dye and the synthesized composite material has good stability.

A chemical method for preparing dye-sensitized solar cell slurry relates to a method for preparing dye-sensitized solar cell slurry. The method comprises the following steps: (1) dispersing P25 titanium dioxide into water or ethyl alcohol, and adding glacial acetic acid as the surface modifying agent of titanium dioxide; (2) heating the mixed solution obtained from step (1) to 80-90 DEG C and keeping the mixed solution at the temperature for 10-24h; (3) drying the mixture obtained from step (2) in a vacuum drying box to obtain surface-modified powder; and (4) dispersing the powder obtained from step (3) into aqueous solution under ultrasonic waves, and adding ethyl alcohol solution containing 0.05-0.2wt% of hydrochloric acid to prepare thick titanium dioxide slurry. The method of the invention is simple and practical. The P25 powder is low in cost, an electrode prepared with the slurry is transparent, the whole process has a short period, the process is simple, and large-scale industrial production is easy to realize.

A method for detecting the penetration type water vapor diffusion coefficient of a large-thickness low-porosity asphalt mixture is disclosed. The method includes molding a large-thickness close-gradedcylinder asphalt mixture test piece to be detected; adding a proper amount of distilled water controlling 100% relative humidity in an opened glass container into the container to prepare a water vapor diffusion device; putting the device into a vacuum drying oven capable of controlling a constant temperature, with P2O5 being disposed in the oven to provide stable humidity in the oven; vacuumizing the vacuum drying oven according to a set negative pressure by utilizing a vacuum pump; weighing everyday and recording the reduced mass of the device, namely the mass of water vapor penetrating theasphalt mixture; and calculating the vapor diffusion coefficient at the specific temperature and in the relative humidity gradient according to an equation. The method can achieve testing of the penetration type water vapor diffusion coefficient of the asphalt mixture at specific temperature in relative humidity gradient and under different negative pressures, significantly shortens testing time,and increases the efficiency. A test material is simple to prepare, the test method is simple and convenient to operate and testing precision is high.

The invention discloses a method for preparing hexyl-dioctyl phosphorus oxide. The method comprises the following steps: adding dioctyl phosphorus oxide, 1-hexene, an acetic acid solvent and di-tert-butyl peroxide in a PTFE (Polytetrafluoroethylene) reaction kettle, adding a small amount of industrial mixed decene, stirring and dissolving, rising the temperature to be 130 to 140 DEG C, reacting for 12 to 36 hours, detecting and completely reacting under <31>P-NMR (Nuclear Magnetic Resonance), adding 5 to 15 weight percent of diluted hydrochloric acid in a reaction solution for carrying out demulsifying and washing, extracting by using trichloromethane, washing an organic layer to be neutral by using water, evaporating to remove trichloromethane and unreacted olefin through a rotary evaporator, recrystalizing by using ethanol, filtering, and carrying out vacuum drying, thus obtaining white solid. The method for preparing hexyl-dioctyl phosphorus oxide, disclosed by the invention, is simple in steps, is green and environmentally friendly and is good in atom economy, a product is high in purity, separation is easy, and an industrial prospect is obtained; the product is applied to industries of water quality detection and sewage treatment.

The invention discloses stereocomplex polylactic acid and a preparation method thereof. The preparation method comprises the following steps: fully drying PLLA and PDLA in a vacuum drying oven until the water content is less than 300ppm; heating graphene oxide to 120-200 DEG C in a vacuum drying oven, conducting drying for 1-60 minutes, conducting cooling to room temperature under a vacuum condition, taking out and sealing the cooled material for later use; and fully mixing the obtained material, and conducting internal mixing in an internal mixer, wherein the internal mixing temperature is smaller than or equal to the sum of the heating temperature of graphene oxide in the S2 in the vacuum environment and the temperature of +(0-50) DEG C, the rotating speed is 10-100 rpm, and the time is 3-10 minutes. The prepared stereocomplex polylactic acid can still keep a product with high SC content after multiple melting heat treatment, and the preparation method is simple and convenient.

The invention discloses a production technology of low-sugar candied watermelons. The production technology comprises the following steps of: (1) selecting fresh watermelons which are free from diseases and insect pests, and cleaning the selected fresh watermelons; (2) blanching the cleaned fresh watermelons in water of which the temperature is 90-100 DEG C for 0.5-1.5 minutes, and removing outer peels of the fresh watermelons; (3) performing hardness improving treatment on the watermelons treated in the step (2), wherein delta-glucolactone is used as a hardening agent, the proper concentration of hardening liquid is 2-4%, and the time is 3-5 hours; (4) performing vacuum sugar infiltration on the watermelons after hardening treatment with a 45% sugar solution for 20 minutes, performing maceration for 36 hours with a 50% sugar solution, and adding 1.1% citric acid; (5) performing vacuum drying for 10-12 hours on the watermelons after the vacuum sugar infiltration; and (6) after the vacuum drying, packaging the dried watermelons. The measures of sulfur-free color protection, vacuum sugar infiltration, low-temperature sugaring, vacuum drying, packaging with nitrogen and the like are adopted, so that the nutrient components of the fresh watermelons can be maintained to the maximum extent, the sugar content is low, the shelf life is long, and the requirements of people for the quality and the mouth feel of preserved fruits are met after living standards are increased.

The invention discloses an anti-radiation post-treatment method of latex gloves. The anti-radiation post-treatment method comprises the following steps: after adding a latex base material into a glovemold, carrying out a microwave radiation modification finishing technology; after carrying out modification finishing, carrying out a series of technological flows to obtain a semi-finished product;then putting the semi-finished product into an anti-radiation finishing agent prepared from 70 percent of anti-radiation plant extract, 3 percent of a citric acid solution and the balance of de-ionized water, and treating; then taking out the semi-finished product and washing with water; carrying out drying treatment by adopting a vacuum drying technology to obtain a latex glove finished product.The anti-radiation type latex gloves prepared by treating through the anti-radiation post-treatment method provided by the invention have the advantages of soft hand feeling and comfort for wearing and touching, and also have an excellent anti-radiation capability.

The invention discloses a method for preparing a wastewater treatment material from a grape vine material, which mainly comprises the following steps of: 11, drying the grape vine material until the water content is less than 15%, and crushing until the particle size is less than 20 meshes to form a base material; 12, a base material is soaked in the ferric oxide sol to be subjected to dipping treatment for 0.5-8 h, and drying is conducted in the environment of 105 DEG C; and step 13, soaking the base material dried in the step 12 into titanium dioxide sol, performing hydrothermal treatment, performing ultrasonic cleaning for 3 minutes by adopting deionized water, and performing vacuum drying for 24 hours in an environment of 50 DEG C to obtain the wastewater treatment material. According to the invention, nano titanium dioxide and nano iron trioxide are compositely loaded on a grape vine material residue carrier, so that on one hand, a bio-based porous material, namely grape vines, is used as the carrier, the loading area of the carrier is increased, and the carrier is high in strength, recyclable and good in biodegradability; and meanwhile, the photocatalyst has relatively high photocatalytic efficiency when being used for treating wastewater with high-concentration and high-content organic pollutants.