67 results about "Sodium Acetate Trihydrate" patented technology

The invention discloses a preparation method of an antibacterial moisture-permeable polyamide fiber and the antibacterial moisture-permeable polyamide fiber, and relates to the technical field of polyamide fibers. When the antibacterial moisture-permeable polyamide fiber is prepared, pretreated carbon nanotubes, ferric trichloride, sodium acetate trihydrate and diallyl disulfide are subjected to a microwave-assisted heating reaction, and carbon nanotube loaded nano iron sulfide is prepared; the preparation method comprises the following steps: modifying carbon nano tube loaded nano iron sulfide by using 3-aminopropyltriethoxysilane to prepare a modified carbon nano tube; mixing the modified carbon nanotubes and a nylon raw material, and performing melt spinning to obtain modified polyamide fibers; the modified polyamide fibers are modified with diethyl (3-aminopropyl) phosphate, 3-pyridylaldehyde and ethyl isocyano acetate, and flame-retardant modified polyamide fibers are prepared; and modifying the flame-retardant modified polyamide fiber with propane sultone to obtain the antibacterial moisture-permeable polyamide fiber. The prepared antibacterial moisture-permeable polyamide fiber has the advantages of being antibacterial, moisture-absorbing, antistatic, flame-retardant and high in tensile strength.

The invention belongs to the technical field of phase change heat storage materials, and particularly relates to a phase change composite heat storage and energy storage material and a preparation method thereof. The phase-change composite heat and energy storage material comprises the following raw material components: sodium acetate trihydrate, disodium hydrogen phosphate dodecahydrate, porous silicon dioxide, nano Al2O3, expanded graphite, borax, polyacrylamide and the balance of water. The preparation method of the material comprises the following steps: S1, heating sodium acetate trihydrate to a molten state, and dipping into porous silicon dioxide; s2, adding borax, nano Al2O3, disodium hydrogen phosphate dodecahydrate, polyacrylamide and water, and stirring for dissolving; s3, adding expanded graphite, and grinding; and S4, cooling to obtain the product. The invention aims to solve the key problems of high supercooling degree, phase separation, insufficient phase change latent heat, poor comprehensive performance and the like of the existing phase change heat storage material, and a new material meeting the requirements of building heating, industrial waste heat recovery, solar heat storage and other fields on efficient heat storage and heat management is prepared.

The invention provides a lightweight single-component fireproof sealing filler. The lightweight single-component fireproof sealing filler comprises calcium sulfate hemihydrate, aluminosilicate, polyvinyl alcohol, cellulose ether, titanium dioxide, a gypsum retarder, a defoaming agent, sodium acetate trihydrate and a flame-retardant filler, the flame-retardant filler is prepared by taking a compound of alumina fiber and magnesium hydroxide as a matrix, growing a Zr-MOF material with amino on the surface of the matrix, and finally modifying an organic phosphorus compound. The prepared sealing filler is excellent in fireproof performance, good in flame retardance, light in weight, good in mechanical property and convenient to use.

Disclosed herein is a stable oxytocin composition having between about 0.04 and 0.08 IU / mL of oxytocin and / or a pharmaceutically acceptable salt thereof, a buffer comprising sodium acetate trihydrate and acetic acid, a tonicity adjusting agent comprising sodium chloride, a pH adjusting agent comprising acetic acid, sodium hydroxide, or a combination thereof, and water, the composition having a total impurities concentration of equal to or less than 16% after storage of at least six months at 25° C. Also disclosed herein is a pharmaceutical product having a single-use container containing the sterile and storage-stable liquid composition of the present disclosure.

The present application relates to a kind of meloxicam benzene sulfonic acid tablets and its preparation method and application, the meloxicam benzene sulfonic acid tablets include stabilizer, the stabilizer is selected from one or more of anhydrous citric acid, polyethylene glycol, sorbitol, crosslinked povidone, sodium acetate trihydrate, anhydrous sodium acetate, nicotinic acid, nicotinamide, polyacrylic acid resin, ascorbic acid palmitate.The stability of meloxicam benzene sulfonic acid tablets prepared according to the prescription of the present application is significantly improved, while the preparation process is simple, and has good application prospect.

The utility model relates to a sodium acetate trihydrate skid-mounted MVR (mechanical vapor recompression) evaporation energy-saving device which comprises a primary skid-mounted MVR device and a secondary falling film evaporation device. The first-stage skid-mounted MVR device comprises a first-stage heat exchanger, a second-stage heat exchanger, a heat recovery heat exchanger, a compressor and a condensate water recovery tank. And the secondary falling film evaporation device comprises a tubular heat exchanger and a separation chamber. Two paths of raw water respectively pass through the primary heat exchanger and the heat recovery heat exchanger, then pass through the secondary heat exchanger, and enter the tubular heat exchanger and the separation chamber for flash evaporation. And after being pressurized and heated by the compressor, the secondary steam is conveyed to the tubular heat exchanger again for heat exchange, and condensate water is discharged to a condensate water collecting tank and is discharged through a condensate water pump. The concentrated discharged liquid exchanges heat with the raw water through a discharging pump and then is discharged to a concentrated discharged liquid collecting area.

The application relates to a preparation method of an azilsartan solid dispersion and a medicinal composition thereof, and belongs to the technical field of pharmaceutical preparations. A unit dose of the azilsartan solid dispersion comprises azilsartan 20 mg, povidone K30 50-105 mg, sodium acetate trihydrate 4.9-5.7 mg, microcrystalline cellulose 210-270 mg, mannitol 65.6-83.2 mg, and sodium croscarmellose 8-24 mg which is added internally, and the preparation method is wet granulation; a unit dose of the azilsartan medicinal composition comprises the solid dispersion 429.5 mg, sodium croscarmellose 16 mg which is added externally, magnesium stearate 4.5 mg, and film coating premix 18 mg. The preparation process of the azilsartan solid dispersion is simple, almost all pharmaceutical factories have the hardware conditions, and no first and second class organic solvents are used, so that the safety and bioavailability of the azilsartan preparation are effectively improved; the stability of the azilsartan solid dispersion is good, and the dissolution rate and related substances do not obviously decrease after long-time storage.

The utility model discloses a trailer type drainage unit which comprises a trailer chassis, a rectangular box body is fixedly installed on the trailer chassis, a generator set and a storage battery are installed in the box body, supporting legs capable of being adjusted in a lifting mode are arranged at the four corners of the outer side of the trailer chassis, and storage chambers are arranged on the front side and the rear side of the bottom of the box body respectively. The storage chamber is provided with an opening in the side face of the trailer chassis, the upper portion of the opening is provided with a side door capable of being opened and closed in an overturning mode through a hinge, a heat accumulator is installed in the middle of the bottom side of the box body, the heat accumulator is of a closed tank structure and filled with sodium acetate trihydrate, and a plurality of evenly-arranged fin plates are welded to the outer portion of the heat accumulator. The heat accumulator accumulates heat through heat dissipation of the engine, and a through hole communicated with a cavity where the heat accumulator is located is formed in the side face of the storage chamber. The drainage unit is convenient to transport and deploy, can be quickly moved to a place needing drainage in a short time, and is suitable for different operation places and scenes.

The invention relates to a high-capacity modified sodium manganese pyrophosphate positive electrode material of a sodium ion battery and a preparation method and application thereof, the preparation method comprises the following steps: adding sodium acetate trihydrate, manganese acetate tetrahydrate, ammonium dihydrogen phosphate and boric acid or silicon dioxide into deionized water to prepare a mixed solution, adding citric acid monohydrate, and uniformly stirring to obtain a precursor solution; sending the precursor solution to a spray dryer by using a peristaltic pump, and carrying out spray drying under the pressure of 2Bar to obtain a boron or silicon modified sodium manganese pyrophosphate precursor material; and placing the precursor material in an alumina crucible, placing the alumina crucible in a box-type furnace or a tube furnace, and carrying out heat treatment at 600 DEG C in an argon atmosphere to obtain the boron or silicon modified sodium manganese pyrophosphate material. The sodium manganese pyrophosphate-rich positive electrode material obtained through boron or silicon modification has the electrochemical sodium storage capacity superior to that of most sodium manganese pyrophosphate, and the use performance and effect of a sodium ion battery are improved.

The invention discloses a high-density culture medium of lactobacillus buchneri and a fermentation method. The high-density culture medium is prepared from 28-35 g / L of glucose, 20-30 g / L of corn steep liquor dry powder, 20-30 g / L of yeast extract, 5-9 g / L of sodium acetate trihydrate, 4-7 g / L of diammonium hydrogen citrate, 0.6-1 g / L of MgCl2, 0.8-1 g / L of CaCO3, 0.2-0.5 g / L of MnSO4 and 0.6-1 g / L of Tween-80; 2, a fermentation process: placing the seed solution at 37 DEG C, performing two-stage culture, namely first-stage culture for 24 hours and second-stage culture for 12 hours, inoculating the second-stage seed solution into a sterilized fermentation tank culture medium according to 3% (v / v), controlling the initial pH to be 7.0 and the fermentation pH to be 6.5, performing fermentation at 37 DEG C, supplementing glucose twice during the fermentation period, and performing culture until the fermentation is finished. The total fermentation time is 40-44 hours. The activity of the lactobacillus buchneri fermented by the method can reach 1.42 * 10 < 10 > CFU / mL, and the high-density culture technology of the lactobacillus buchneri is improved. The industrial pain point problem of low activity of the lactobacillus buchneri at present is successfully solved.

The invention relates to the technical field of aluminum electrolysis metallurgy, in particular to an aluminum electrolysis carbon anode anti-oxidation coating and a preparation method thereof. The coating is prepared from the following raw materials in percentage by mass: 45-60% of aluminum oxide powder; 15 to 25% of water glass; 8-12% of potassium feldspar powder; 0.5 to 2% of sodium fluoride; 7-11% of sodium acetate trihydrate; 8-12% of ionized water; the preparation method comprises the following steps: S1, preparing the catalytic compact component; s2, mixing the coating; s3, coating and drying; and S4, carrying out high-temperature calcination. The product provided by the invention has good oxidation resistance, adhesive force and compactness, and the preparation method provided by the invention has the advantages of simple process and low cost.

The application provides a preparation method of high-yield sodium acetate trihydrate, and belongs to the technical field of fine chemical product synthesis. The preparation method comprises the following steps: (1) reacting glacial acetic acid, a sodium-containing alkaline solution and water to obtain an initial sodium acetate solution; (2) reacting the initial sodium acetate solution obtained in the step (1) with a solvent solvent, and performing solid-liquid separation to obtain a solid and a liquid; the solvent solvent is selected from at least one of acetone, ethylene glycol, isopropyl alcohol and ethanol; the mass ratio of the solvent solvent to the initial sodium acetate solution is 0.5-2:1; and (3) washing and drying the solid obtained in the step (2) with a solvent solvent to obtain sodium acetate trihydrate. The sodium acetate trihydrate product with high yield is obtained by adopting a mild reaction temperature and performing the reaction under the action of the solvent with specific types and proportions.

The application relates to a preparation method of a phase change material which can store energy for a long time and release heat in intermittent crystallization, and relates to a preparation method of the phase change material. The application solves the problem that the existing phase change material can only release all stored energy once, and cannot release part of the stored energy in intermittent multiple times. The method is as follows: a melted sodium acetate trihydrate, a polymer monomer, a crosslinking agent and a stabilizer are heated and mixed to obtain a reaction system, an initiator is added into the reaction system, and heat preservation is carried out. The application is used for the preparation of the phase change material which can store energy for a long time and release heat in intermittent crystallization.

The invention discloses a preparation method of photo-thermal energy storage thermally induced flexible phase change hydrogel, and belongs to the field of phase change materials. The invention aims to solve the problem that the existing phase change material cannot realize soft and hard switching and efficient collection and long-term storage of solar energy. The method comprises the following steps: 1, preparing carbonized wood powder; 2, heating and melting sodium acetate trihydrate; and 3, thermally initiated polymerization. The preparation method is used for preparing the photo-thermal energy storage thermally induced flexible phase change hydrogel.

The invention provides a pharmaceutical preparation of a cefotaxime sodium compound and a preparation method thereof. The preparation method comprises the following steps: S1, weighing 20.0 g of sodium acetate trihydrate, putting the mixture into a reactor, adding 40.0 mL of a crystallization solvent, stirring and dissolving the mixture for 10 minutes, and obtaining a sodium acetate trihydrate solution; S2, adding cefotaxime acid to the sodium acetate trihydrate solution, and obtaining a clear and transparent reaction solution after the salt-forming reaction is complete; S3, moving the reaction solution into a crystallizer, dripping 0.5-2 mL of a 40% alkyl glycoside aqueous solution into the crystallizer, and starting stirring; S4, starting a constant temperature ice machine, and starting to drip a dissolving agent when the solution temperature in the crystallizer reaches 20-24° C., adding a seed crystal when the solution is slightly turbid, growing the crystal for 30 minutes, and continuing to drip a dissolving agent, and adding a total of 265 mL of a dissolving agent; S5, after the dissolving and crystallization is completed, vacuum filtration is performed, and drying is performed to obtain the cefotaxime sodium compound. The present invention reduces supersaturation, reduces nucleation barriers, and weakens spontaneous nucleation through the participation of 40% alkyl glycoside aqueous solution, so as to obtain a product with a large average particle size and concentrated particle size distribution.

The invention discloses a total arsenic online monitoring reagent formula and a preparation method, the total arsenic online monitoring reagent formula comprises a reagent A, a reagent B, a reagent C, a reagent D and a total arsenic standard solution, the reagent A is composed of sulfuric acid, potassium persulfate and pure water, the reagent B is composed of sodium acetate trihydrate, glacial acetic acid, an emulsifier OP-10, silver carbonate, absolute ethyl alcohol and pure water, the reagent C is composed of sulfuric acid, tartaric acid and pure water, and the reagent D is composed of sodium acetate trihydrate, glacial acetic acid, an emulsifier OP-10, silver carbonate, absolute ethyl alcohol and pure water. The reagent D is composed of potassium hydroxide, potassium borohydride and pure water, and the total arsenic standard solution is mother liquor with the concentration of 1000 mg / L. Through the synergistic effect of silver carbonate in the reagent B and the emulsifier OP-10, interference substances such as sulfides and heavy metal ions can be effectively shielded, the relative standard deviation of a monitoring result is smaller than or equal to 5%, and the accuracy of monitoring data is improved.

The invention belongs to the technical field of material chemistry, and discloses a cobalt-doped ferric oxide material and a preparation method and application thereof.The preparation method comprises the following steps that 1, ferric chloride hexahydrate and cobalt nitrate hexahydrate are dissolved in deionized water, absolute ethyl alcohol and sodium acetate trihydrate are added, and stirring is conducted under the room temperature condition till solute is completely dissolved; 2, the precursor solution prepared in the step 1 is placed in an air atmosphere for magnetic stirring, then solvothermal synthesis is carried out, centrifugation, cleaning and drying are carried out after the reaction is finished, and the cobalt-doped ferric oxide material is obtained and comprises a framework formed by ferric oxide nano cubic crystals and a cobalt element, the cobalt element enters the framework to replace part of the iron element to form chemical bonds with the oxygen element, and the degradation rate of bisphenol A within 20 minutes is as high as 100%.

The present application relates to a kind of MVR processing system and method of high-salt wastewater containing sodium acetate and sodium chloride, belong to high-salt wastewater treatment technical field, including the following preparation steps: S1, MVR evaporation stage: high-salt wastewater is added to MVR evaporator and is evaporated, and evaporation liquid is obtained;S2, first crystallization leaching stage: evaporation liquid is cooled and crystallized, and first mother liquor and first crystal are obtained, and the first crystal that is separated out is filtered and leached, and sodium chloride is obtained, and the first leaching liquid after filtration and leaching is transported to MVR evaporator;S3, second crystallization leaching stage: first mother liquor is diluted with water and cooled and crystallized, and second crystal and second mother liquor are obtained, and the second crystal that is separated out is filtered and leached, and sodium acetate trihydrate is obtained, and second mother liquor and the second leaching liquid after filtration and leaching are transported to MVR evaporator.The present application realizes the continuous separate separation of two salt divisions of sodium acetate and sodium chloride, reduces the discharge of waste mother liquor, and meets the concept of energy saving and carbon reduction in the industry.

The invention discloses an azilsartan solid dispersion and a preparation method of a medicinal composition thereof, and belongs to the technical field of medicinal preparations. A unit dose of the azilsartan solid dispersion comprises 20 mg of azilsartan, 50 to 105 mg of povidone K30, 4.9 to 5.7 mg of sodium acetate trihydrate, 210 to 270 mg of microcrystalline cellulose, 65.6 to 83.2 mg of mannitol, and 8 to 24 mg of internally added croscarmellose sodium. The preparation method is wet granulation. A unit dose of the azilsartan pharmaceutical composition comprises 429.5 mg of a solid dispersion, 16 mg of cross-linked sodium carboxymethyl cellulose, 4.5 mg of magnesium stearate and 18 mg of a film coating premix. The preparation process of the azilsartan solid dispersion is simple, almost all preparation manufacturers have hardware conditions, first and second organic solvents are not used, the safety and bioavailability of the azilsartan preparation are effectively improved, the azilsartan solid dispersion is good in stability, and the dissolution rate and related substances are not obviously reduced after long-time storage.

The application discloses a method for efficiently synthesizing methotrexate, and relates to the technical field of methotrexate preparation. The method comprises the following steps: preparing three intermediates, and then preparing methotrexate by using the three intermediates. In the process of preparing the intermediates, a step of improving the purity of tribromoacetone is added, so that the content of the tribromoacetone is increased from 89-90% to more than 98%, thereby reducing the separation difficulty of the product, reducing the generation of impurities, and improving the yield; in the step of preparing the methotrexate, a new catalyst is used, sodium acetate trihydrate and potassium dihydrogen phosphate are used as a composite catalyst, and the yield of the methotrexate is improved.

The invention relates to a copolymerized hydrogel-sodium acetate trihydrate composite phase change material as well as a preparation method and application thereof, and belongs to the technical field. The copolymerized hydrogel is prepared from the following components in parts by mass: 3-10 parts of a copolymerized hydrogel base material, 87-97 parts of sodium acetate trihydrate and 0.5-3 parts of a nucleating agent, the copolymerized hydrogel base material is prepared from two polymer monomers, a cross-linking agent, an initiator and a photo-thermal agent, wherein one polymer monomer is acrylamide; the nucleating agent is sodium carbonate decahydrate. High loading rate and high phase change latent heat value of the sodium acetate trihydrate phase change material are realized by utilizing the copolymerized hydrogel under the condition of a specific nucleating agent. The material is in a solid state all the time before and after phase change, and the problems of supercooling, phase separation and easy leakage of sodium acetate trihydrate do not exist.

A phase change material (PCM) comprises hydrated sodium acetate and a polymeric additive comprising carboxylated, sulphated and / or sulfonated lignin; carboxylated, sulphated and / or sulphonated cellulose; carboxylated, sulphated and / or sulfonated humin; sulphated and / or sulfonated humic acid; and / or humic acid. The PCM may further comprise a nucleating agent e.g. disodium phosphate. The sodium acetate trihydrate-based phase change material (PCM) has improved thermal stability over repeated cycles.

Measuring tool (1), in particular measuring tool (1) for measuring the interior of a footwear, comprising: - a shaped body (10) and - at least one handle (20), wherein the molded body (10) can have at least two states (A, B), wherein in a first state (A) the molded body (10) is plastically deformable and in a second state (B) the molded body (10) is essentially plastically indeformable, wherein the shaped body (10) can be transformed from the first state (A) to the second state (B) by a crystallization process, wherein the shaped body (10) has a shell (15) and a mass of the shaped body (10) located in the shell (15), wherein the shaped body (10) can be transformed from the first state (A) to the second state (B) by a chemical or physical process, wherein the mass in state (A) of the molded body comprises a supersaturated aqueous sodium acetate trihydrate solution.

The invention relates to a high-capacity sodium manganese pyrophosphate positive electrode material capable of regulating and controlling the content of P2O7 and a preparation method and application thereof.The preparation method comprises the steps that sodium acetate trihydrate, manganese acetate tetrahydrate and ammonium dihydrogen phosphate are added into deionized water, citric acid monohydrate is added, the mixture is stirred to be uniform, a precursor solution is obtained, spray drying is conducted, and a sodium manganese pyrophosphate precursor material capable of regulating and controlling the content of P2O7 is obtained; and placing the precursor material in an alumina crucible, placing the alumina crucible in a box-type furnace or a tube furnace, and carrying out heat treatment in an argon atmosphere to obtain the sodium manganese pyrophosphate material for regulating and controlling the content of P2O7. The preparation method has the advantages that the electronic structure of the material is changed by regulating and controlling the content of P2O7 polyanion groups and reducing the content of the P2O7 groups in the sodium manganese pyrophosphate structure, the thermodynamic induction effect is reduced, the oxidation-reduction potential is reduced, the multi-electron transfer reaction is promoted, and the high specific capacity is realized.

The application discloses a preparation method of a composite phase change material for solving the supercooling problem of sodium acetate trihydrate, and relates to the technical field of phase change material production, and comprises the following steps: S1, 30 g of natural crystalline bischofite is weighed, dried at 120 DEG C for 12 h, and then dissolved in 90 g of anhydrous ethanol to form a magnesium chloride solution; S2, the magnesium chloride solution is filtered by using a vacuum filtration bottle, and insoluble substances are separated; the ethanol component in the obtained solution after filtration is evaporated by using a rotary evaporator, and a precipitate, magnesium chloride hexahydrate MgCl2.6H2O, is obtained; S3, the magnesium chloride hexahydrate MgCl2.6H2O is combined with sodium acetate trihydrate SAT at an optimized mass ratio of 3:17; and S4, after complete melting and uniformity, 1% sodium polyacrylate PAAS is added as a thickening agent, and the mixture is packaged in expanded graphite EG. The method can realize effective utilization of the by-product bischofite of a salt lake, and simultaneously solve the supercooling problem of SAT.

The invention relates to the technical field of hot compress bags, and particularly discloses a hot compress bag capable of preventing self-activation and a preparation method thereof.Sodium thiosulfate pentahydrate, sodium acetate trihydrate and deionized water jointly form a ternary phase-change material, and compared with a single-component phase-change material, the newly formed ternary phase-change material is low in co-melting point and high in thermal stability; the ternary phase-change material can be kept at a lower temperature without phase change, and the thickening agent is added into the ternary phase-change material and is dispersed in the phase-change material, so that the stability of a phase-change material system is improved, and meanwhile, the intermolecular hydrogen-bond interaction force of the thickening agent hinders crystallization in a cooling process, so that the stability of the phase-change material system is improved. And the system can be kept at a lower temperature without phase change.

The utility model provides a device for separating sodium acetate trihydrate from byproduct sodium acetate, which belongs to the technical field of sodium acetate preparation, and comprises a first tower body, a second tower body and a third tower body, a first mother liquor pipe, a first mixed extraction pipe, a first extraction liquid outlet pipe and a first mother liquor outlet pipe are arranged on the first tower body; a second sieve plate is arranged in the second tower body, and a second mother liquor pipe, a second mixed extraction pipe, a second extraction liquid outlet pipe and a second mother liquor outlet pipe are arranged on the second tower body; the extraction liquid return tank is communicated with the first extraction liquid outlet pipe and the second extraction liquid outlet pipe; and the finished material tank is communicated with the second mother liquid outlet pipe. And the efficiency of purifying sodium acetate trihydrate from the byproduct sodium acetate is improved.

The application discloses a sodium acetate and sodium acetate trihydrate production device, which comprises a reaction system, an evaporation system, a crystallization system and a drying system. The reaction system is used for reacting sodium hydroxide solution and acetic acid solution to generate sodium acetate solution. The evaporation system is connected with the reaction system and is used for evaporating and concentrating the sodium acetate solution. The crystallization system is connected with the evaporation system and is used for crystallizing the sodium acetate solution after evaporation and concentration to prepare sodium acetate trihydrate. The drying system is connected with an outlet pipeline of the filter, and is used for drying the solid in the sodium acetate solution after evaporation, concentration and dehydration and the solid of the sodium acetate trihydrate after crystallization and filtration to prepare sodium acetate product and sodium acetate trihydrate product. The sodium acetate and sodium acetate trihydrate production device can simultaneously meet the demand of producing sodium acetate product and sodium acetate trihydrate product, and can timely adjust the production of the sodium acetate product and the sodium acetate trihydrate product according to actual production demand.

The invention discloses a sodium acetate trihydrate-lotus root starch / carbon nanofiber composite phase change material and a preparation method thereof. The preparation method comprises the following steps: step 1, drying carbon nanofibers; step 2, heating and melting sodium acetate trihydrate, adding lotus root starch into the sodium acetate trihydrate in a molten state, and stirring to obtain a sodium acetate trihydrate-lotus root starch system; and step 3, adding the carbon nanofibers dried in the step 1 into the system obtained in the step 2 for impregnation, taking out the phase change material after impregnation, and performing liquid leakage to obtain the sodium acetate trihydrate-lotus root starch / carbon nanofiber composite phase change material. The composite phase change energy storage material disclosed by the invention is high in comprehensive latent heat, high in heat conductivity and good in thermal cycle performance.

The invention discloses a piracetam injection and a preparation method and application thereof, and belongs to the technical field of pharmaceutical preparations, the piracetam injection is composed of the following components: piracetam, sodium acetate trihydrate, water for injection and glacial acetic acid, the content of piracetam is 200 mg / ml, the content of sodium acetate trihydrate is 0.8-1.2 mg / ml, and the pH value of the injection is 5.78-5.81. The piracetam injection prepared by the invention can achieve a complete impurity-free degree, and is relatively good in stability.