141results about How to "Avoid sedimentation" patented technology

The invention relates to a production method of a boron nitride coated diaphragm of a lithium-sulfur battery. The diaphragm is produced from a commercial polypropylene diaphragm, two sides of the diaphragm are uniformly covered with hexagonal boron nitride, and the characteristics of hexagonal boron nitride 'white graphite' are used, so lithium ions are allowed to pass, shuttle of polysulfide anions is obstructed, a reaction of a lithium negative electrode with the polysulfide anions is inhibited, formation of lithium dendrites, lithium sulfide precipitate and fixed lithium is prevented, the capacity, the coulombic efficiency and the cycle stability of the lithium-sulfur battery are improved, the growth of the negative electrode metal dendrite in the cycle process is effectively inhibited, and the safety of the battery is improved. The method has the advantages of simple process route and clear purpose, and the produced diaphragm has multiple functions, and can greatly overcome disadvantages of present technologies.

The ink jet recording device includes an ink jet recording head and an ink circulation system. The ink circulation system has an ink tank, an ink feeding unit, an ink supplying system and an ink recovery system. The ink feeding unit is provided in the ink tank, and has both a function to supply ink from the ink tank to the recording head through the ink supplying system and a function to stir the ink stored in the ink tank. The ink circulation system circulates the ink by supplying the ink to the recording head through the ink supplying system and recovering the ink supplied to the recording head through the ink recovery system.

The ink jet recording device includes an ink jet recording head and an ink circulation system. The ink circulation system has an ink tank, an ink feeding unit, an ink supplying system and an ink recovery system. The ink feeding unit is provided in the ink tank, and has both a function to supply ink from the ink tank to the recording head through the ink supplying system and a function to stir the ink stored in the ink tank. The ink circulation system circulates the ink by supplying the ink to the recording head through the ink supplying system and recovering the ink supplied to the recording head through the ink recovery system.

The invention discloses a production system and process of pigment carbon black with low impurity content and relates to the field of production of carbon black. The production system comprises a raw material supply device, a reaction device, pre-heating devices, a collection device, a granulation device and a storage and packaging device, wherein air, raw oil and fuel oil enter the reaction device from the respective pre-heating devices; carbon black flue gas passing through the reaction device is used for pre-heating the air and the raw oil and sequentially enters the collection device, the granulation device and the storage and packaging device to finish carbon black collection; in the production process, the raw oil passes through four paths of filtering devices in advance; before an additive is blended, the raw oil is pre-dissolved with water; quenched water needs to be purified; an ultrafine grinding device is arranged in the collection device; the content of non-carbon impurities in a production process is effectively reduced and the purity of the pigment carbon black is improved; advanced equipment and process technology are adopted so that the aim of reducing the content of the impurities in a carbon black finished product is realized.

An apparatus for mixing a viscous flowable medium includes a receptacle for receiving the viscous flowable medium and has a substantially vertically arranged rotatable stirring axle and a stirring assembly that comprises at least one stirring element. In one embodiment, the stirring element is arranged at a lower end of the stirring axle substantially perpendicular thereto for rotation of the stirring element around the stirring axle. The stirring elements are shovel-like and are open towards an end of the stirring axle remote from the lower end and inclined with a slant angle in rotation direction towards a bottom of the receptacle, such that said viscous liquid upon rotation of the stirring axle is at least partly directed upwards in the receptacle by the at least one shovel-like stirring element.

The invention discloses a method for rapidly preparing large-particle-size silica sol, belongs to the field of inorganic application materials and in particular relates to an ion exchange method for rapidly preparing the large-particle-size silica sol. High-purity sodium silicate prepared by fumed silica is selected as a raw material, activated silica acid and silica mother solution are prepared by virtue of an ion exchange method, the pH value of the silica mother solution is regulated so as to compress a double electrode layer of silica sol particles, and the distance among the nanoparticles is further shortened so as to increase the silica particle size increase rate. Therefore, rapid formation of particle size of large-particle-size silica sol is promoted, narrow particle size distribution can be obtained, and the production efficiency and quality are greatly improved. According to the addition of a stabilizer and a polymerization inhibitor, the effects of preventing aggregation of silica sol and ending the reaction can be respectively achieved, and nanometer silica sol with uniform dispersion and controllable particle size is finally obtained. Compared with the traditional ion exchange method, the method disclosed by the invention has the advantages that the prepared silica sol is high in purity, the particle size distribution is narrow, and the production efficiency is doubled.

The invention discloses a natural pullulan polysaccharide hydrogel wound dressing, which is prepared by undergoing a cross-linking reaction on a carboxy methylation pullulan polysaccharide and a hydrazine or diamine, wherein the crosslinking degree of carboxyl of the carboxy methylation pullulan polysaccharide and the hydrazine or the amino of the diamine is 30-90 percent. A preparation method of the wound dressing comprises the following steps of: performing carboxy methylation on the natural pullulan polysaccharide, preparing the carboxy methylation pullulan polysaccharide into a solution of which the concentration is 0.1-1.0g / ml by using deionized water, adding the hydrazine or diamine into the aqueous solution of the carboxy methylation pullulan polysaccharide with stirring at normal temperature and under normal pressure, adding an aqueous solution of 1-(3-dimethylamino propyl)-3-carbodiimide hydrochloride of which the concentration is 0.5-1.0g / ml after uniformly stirring, and uniformly stirring; and standing the obtained solution at normal temperature, crosslinking for at least 10 minutes, soaking into deionized water for at least 6 days after crosslinking, removing impurities, and drying in vacuum to obtain the natural pullulan polysaccharide hydrogel wound dressing.

This invention relates to a method for separating and purifying 1,3-dihydroxypropane from microbial fermentation liquor, comprising: after the sterilization and dehydration of fermentation liquor, add in 1-pentanol or isoamyl alcohol, n-butanol and n-hexanol, then remove the sediment in the fermentation liquor by filtration or settlement followed by washing; add in appropriate amount of glycerol or 1,4-butylene glycol to the supernatant to recover 1-pentanol or isoamyl alcohol, n-butanol and n-hexanol, by decompression or normal pressure distillation, so as to produce high-purity 1,3-dihydroxypropane, with more than 95% recovering rate. This invention is characterized of simple separation process, mature technique, low separation cost, and little additional introduced agent with easy recovery. Besides, the crystallization sediment in the fermentation liquor can be efficiently separated, which overcomes the problems of foaming, agglomerating and pipe clogging during distillation, so as to realize continuous operation.

The invention discloses a peach juice beverage and a preparation method thereof and belongs to the technical field of food processing. Each 1,000 parts of the beverage comprises following raw materials in parts by weight: 60-75 parts of peach pulp, 73-105 parts of a sweetening agent, 2-4.5 parts of a sour agent, 0.3-0.7 part of an antioxidant, 1-1.6 parts of a stabilizing agent, 0.4-0.6 part of peach essence and of the balance being water, wherein the stabilizing agent is composed of sodium carboxymethylcellulose, xanthan gum and sodium alginate with the mass ratio of (2-4):(2-4):(1-2). The peach juice beverage is reasonable in compatibility; the stability is good in a storage rack period and the mouth feel is good; the peach juice beverage is easy to produce. The stabilizing agent is compounded by the sodium carboxymethylcellulose, the xanthan gum and the sodium alginate so that the system viscosity can be increased and the thickening and emulsification effects are exerted; large grains are prevented from being collected and depositing so that sedimentation and layering phenomena are effectively prevented; compared with independently-adopted components, the peach juice beverage has the advantages that the sedimentation rate is low and the stabilizing efficiency is high; the texture is uniform; the peach juice beverage does not have the sedimentation and layering phenomena after being stored at a room temperature for one month.

The invention relates to a method of processing acid tar, concretely is a method of processing acid tar by coal blending coking, which mainly solves technical problems of environment pollution made by the acid tar. Technical project for solving the problems includes steps: a) adding alkaline solution into the acid tar to adjusting pH value of 6-8 at 80-100 DEG C; b) putting mixed liquid of the acid tar and the alkaline solution in waste acid groove beside coal blending belt of coal blending workshop, wherein the waste acid groove must be heated to 50-80 DEG C to prevent the mixed liquid from delaminating and depositing; c) adding the mixed solution befittingly into coal blending by pipe and spraying device. Adding mode of the mixed solution is continuously adding at upper of the coal blending belt when the belt is carrying coal, and stopping when the belt stops. The invention is mainly used for post-treatment of acid tar generated from coking plant.

A developing roller for electrophotographic image forming apparatus is disclosed. The developing roller has a shaft and a resin layer, and the resin layer comprises a binder resin, a resin particle having a particle diameter of 5 μm to 30 μm and a content of from 10% to 50% by weight with respect to the resin layer, and inorganic oxide particles having a number based average primary particle diameter of 5 nm to 100 nm and a content of 1% to 40% by weight with respect to the resin layer. An image forming method employing the developer roller is also disclosed.

The invention relates to a storable emulsified asphalt cold-patch mixture and a preparation method and application thereof. The storable emulsified asphalt cold-patch mixture consists of the following components in percentage by weight: 7 to 8 percent of emulsified asphalt, 5 to 6 percent of water, 1 to 2 percent of reinforcing agent, 1 to 3 percent of thixotropic agent and the balance of stone, wherein the emulsified asphalt consists of the following components in percentage by weight: 1.0 to 1.5 percent of emulsifying agent, 1 to 3 percent of thickening agent, 26.5 to 36.5 percent of water and the balance of No.70 asphalt. The storable emulsified asphalt cold-patch mixture has the advantages of convenience of manufacture, long storage time, no environmental pollution, convenience of construction, capacity of opening the traffic after construction and the like, and is suitable for repairing pot holes of asphalt pavements.

The invention provides a preparation method and applications of an iron-carbon micro-electrolysis material for maintaining the long-term catalytic activity of a Fenton system. According to the present invention, the catalyst is derived from an iron metal organic framework (Fe-MOFs) and montmorillonite; after Fe-MOFs prepared by a mechanochemical method are mixed with montmorillonite, high temperature carbonizing is performed to form a core-shell type iron-carbon filler micro-electrolysis material (Fe@C-MMT) dispersed between the montmorillonite sheet structures; the inefficient decomposition of hydrogen peroxide can be delayed by highly dispersing the Fe@C-MMT material in the water sample, and the hydroxyl radicals are selectively generated, such that the hydrogen peroxide in the system has long-term oxidation ability; the catalyst has a certain pH value adjustment ability, wherein organic pollutants can be efficiently degraded when the initial pH value is 3-6.5; and the catalyst has good stability, can be reused multiple times, and is suitable for removing refractory organic pollutants such as phenol, methyl orange and the like in environmental water samples by advanced oxidation technology Fenton reactions.

The invention relates to a room-temperature curing efficient adhesive and a preparation method thereof. The room-temperature curing efficient adhesive is composed of a metal primer and a chloroprene rubber adhesive, wherein a base formula of the metal primer comprises the following raw materials by weight: 1200-1500g of chlorinated rubber CR20, 100-200g of general chloroprene rubber CR2321, 1-3g of an anti-aging agent BHT, 200-300g of light magnesium oxide and 3,000-4,000g of industrial methylbenzene; and the chloroprene rubber adhesive comprises the following raw materials by weight: 50-70g of chloroprene rubber A-90, 30-50g of chloroprene rubber M-40, 1-3g of an anti-aging agent WSL, 0.1-0.6g of a red iron oxide pigment, 10-30g of chlorinated rubber R20, 10-50g of fumed silica, 6-8g of light magnesium oxide, 10-40g of terpene-phenolic resin, and 500-800g of a mixed solvent which is composed of methylbenzene and butanone according to the mass ratio of 3 to 2. The room-temperature curing efficient adhesive provided by the invention is high in adhesive strength, stable in quality and good in heat resistance, has good adaptability on metal materials and non-metal materials, and is suitable for large-scale bonding work.

The invention relates to a group of benzene sulfonamido benzamide derivatives, and a preparation method and an application thereof. The research results indicate that the compounds obviously inhibit the apical sodium-dependent bile acid transporter (ASBT) at the cellular level, thereby being expected to be researched and developed to become a clinically effective medicament for treating hyperlipemia and cholestatic diseases.

The invention relates to an electric heating energy-storage recycling system which belongs to the technical field of energy-accumulation energy-saving facilities. The system comprises a heat storage groove and an electric heater, wherein the electric heater comprises a container body, one end of the container body is provided with a heat exchange medium inlet, the other end is provided with a heatexchange medium outlet, and an electric heating element which is externally connected with a power supply is arranged in the container body; the heat storage groove is provided with a first inlet, asecond inlet, a first outlet and a second outlet; the heat exchange medium outlet of the container body is communicated with the first inlet of the heat storage groove and the first outlet of the heatstorage groove is connected with the heat exchange medium inlet of the container body, thereby forming a first circulation loop which is connected with a first circulation pump in series; and the second outlet of the heat storage groove is externally connected with an inlet of a user system and an outlet of the user system is connected with the second inlet of the heat storage groove, thereby forming a second circulation loop which is connected with a second circulation pump in series. The invention is beneficial to the balance of an electric network, can reduce the cost for enterprises and is beneficial to energy saving and discharge reduction.

The invention belongs to the technical field of textile equipment, and particularly relates to an efficient dyeing device for a textile fabric production line. The equipment comprises a dyeing tank, ahorizontally arranged upper sliding plate is arranged in the dyeing tank in a sliding manner, and a lower sliding plate parallel to the upper sliding plate is arranged below the upper sliding plate;the upper sliding plate and the lower sliding plate are both slidably connected with the inner side wall of the dyeing tank through sliding mechanisms, a plurality of supporting rods are fixedly mounted on the lower surface of the upper sliding plate and the upper surface of the lower sliding plate correspondingly, the supporting rods are distributed at equal intervals in a staggered mode, and guide rollers are mounted at the other ends of the supporting rods; through holes are formed in the upper sliding plate and the lower sliding plate in a penetrating mode, the diameter of an opening in the upper end of each through hole is larger than that of an opening in the lower end of each through hole, and a driving mechanism used for driving the upper sliding plate and the lower sliding plate to slide is arranged in the dyeing tank. Dye can be promoted to alternately flow in gaps between warps and wefts of the textile fabric from top to bottom, the permeation effect of the dye in the textile fabric is improved, and the dyeing effect is better.

The invention belongs to the technical field of water pumps, and particularly relates to a clogging prevention control method of a floating water pump. The clogging prevention control method of the floating water pump includes the following steps that 1, the power of a drive motor of a pump body is monitored; 2, the monitored power of the drive motor is compared with preset power and maximum application power of the drive motor; 3, according to comparison results in step 2, the pump body is controlled to make the floating water pump rotate faster, or the pump body stops working, and when the pump body stops working, water in the floating water pump and water in a water pipe are subjected to back flush. During running of the floating water pump, the flow of the floating water pump is reduced, when the power of the floating water pump increases to be within a preset range, the rotation speed of the floating water pump is moderately increased through a control cabinet, and water flow needed by a customer is ensured; when filter screen clogging becomes more serious and the maximum application power of the floating water pump motor is reached, a back flush command is started; a gap withpreset width exists between the periphery of a filter screen and a floating ring, it is convenient to flush junk inside the floating ring and at the inner sides of filtration pores to the external ofthe floating ring, the situation is avoided that the junk deposits at the inner sides of the filtration pores, and the back flush efficiency can be greatly improved.

The invention discloses a cleaning method of a metal nanowire. The cleaning method comprises the coating procedure, cleaning procedure, dispersion procedure and removing procedure. The cleaning method of the metal nanowire is characterized in that a protective layer is formed on the surface of the metal nanowire, coagulation of the metal nanowire is effectively prevented through the protective layer during follow-up suction filtration washing, a solvent, organic polymers and inorganic salt are removed through suction filtration washing, and finally, the protective layer on the surface of the metal nanowire is removed. The cleaning method has the beneficial effects that the quick and efficient cleaning technology of the metal nanowire overcomes the defects that centrifugal washing time is long, operation is complex and efficiency is low, coagulation of the metal nanowire is effectively prevented through the protective layer during follow-up suction filtration washing, the metal nanowire is quickly and efficiently cleaned, the film forming phenomenon during the filtration washing process is effectively avoided, yield of a product is increased, and quality of the product is improved.

The invention discloses a graphene modified inorganic potassium silicate coating. The coating is prepared from the following components in percentage by weight: 10 to 20 percent of a high-modulus potassium silicate solution, 1 to 3 percent of a silane coupling agent, 8 to 10 percent of a silicone acrylic emulsion, 10 to 20 percent of sodium aluminosilicate, 0.1 to 2 percent of graphene, 15 to 20 percent of zinc powder, 1 to 3 percent of attapulgite, 1.5 to 1.8 percent of aid and 20 to 30 percent of deionized water. The invention further discloses a corresponding preparation method. The preparation method comprises the following steps: preparing the high-modulus potassium silicate solution, the silicone acrylic emulsion, a graphene dispersion solution and the like. The coating prepared fromthe graphene-modified inorganic potassium silicate coating has good toughness, adhesion and hardness, the overall corrosion resistance of the coating is improved, metal surface erosion is effectivelyprevented, and the graphene-modified inorganic potassium silicate coating has extremely wide application in preparation of metal anticorrosive coatings.

The invention relates to a multi-material automatic real-time mixed electric spinning direct writing device, and relates to electrostatic spinning. The device includes a hybrid micro channel, a liquid storage device, a liquid conveying pipeline, a driver, a liquid supply hose, a stop valve, a nozzle, a high-voltage power supply, a collecting board, an XYZ three-dimensional mobile platform, a CCD microscope and a computer; the hybrid micro channel is connected with the liquid storage device and the liquid conveying pipeline respectively, the liquid conveying pipeline is connected with the liquid supply hose provided with the driver, the other end of the liquid supply hose is connected with the liquid conveying pipeline divided into two paths, one path of the liquid conveying pipeline is connected with the liquid storage device, the other path of the liquid conveying pipeline is connected with the stop valve, the other end of the stop valve is connected with the nozzle, the nozzle is connected with the positive electrode of the high-voltage power supply, the negative electrode of the high-voltage power supply is connected with the collecting board and then is connected with the ground together with the collecting board, the nozzle and the collecting board are installed on the XYZ three-dimensional mobile platform, the CCD microscope is mounted near the nozzle, and the computer servers as a controller. A micro fluidic chip is used for real-time automatic mixing of electric spinning direct writing multiple-materials, liquid supply and real-time mixing are achieved at the same time by means of the driver, it is ensured that solutions are fully and uniformly mixed, and the efficiency is high.

The invention relates to a pulsed jet rock debris washing tool and belongs to the technical field of auxiliary equipment for drilling. The pulsed jet rock debris washing tool is composed of an upper joint, a housing, a central pipe and a lower joint; the upper joint is installed at one end of the housing by screw threads; the lower joint is installed at the other end of the housing by screw threads; the central pipe is movably installed inside the housing by virtue of a left bearing and a right bearing; the head of one end of the central pipe is in leaning connection with the upper joint and correspondingly communicates with the upper joint; the head of the other end of the central pipe is in leaning connection with the lower joint and correspondingly communicates with the lower joint; thepart, between the left bearing and the right bearing, of the central pipe is provided with at least two flow guide holes; the flow guide holes communicate with a central hole of the central pipe; thecircumference of the housing is provided with a plurality of jet flow holes corresponding to the flow guide holes; and the flow guide holes intermittently communicate with the jet flow holes. The washing tool can be used for cleaning a rock debris bed so as to prevent deposition of rock debris, and also enhances the turbulence degree of drilling fluid around the washing tool so that the fluid generates a better rock taking effect, thereby preventing the risk of blocking of a drilling bit due to deposition of too much rock debris.

The invention relates to a pesticides composition, concretely relating to the application of the pesticides composition which contains fipronil content, has synergism effect and is used to control the pests of diamond-back moth etc., on the crop. The active ingredient A in the composition is the fipronil, and the active ingredient B in the composition comprises at least one germicide of diflubenzuron and tebufenozide. Fipronil A and B comprise at least one germicide of the diflubenzuron and the tebufenozide. The weight portion ration of the two active ingredients in the composition is 1-80:70-1. The invention has obvious synergism effect, small pesticide resistance, light environmental pollution, low production cost, good control efficiency and comparatively long persistently effective period. In the control process of common pest mites of cabbage caterpillar, diamond-back moth, beet noctuid, cotton noctuid, whitefly, etc., on vegetable, fruit trees, cotton and so on, the pesticides composition combined by the fipronil which has strong damaging effect with the diflubenzuron or the tebufenozide is characterized in high efficiency, low pollution, low residue, and that pesticide resistance is not easy to be generated in long-term usage and so on.

The invention relates to the field of engineering, and discloses a self compact concrete construction system and a construction method thereof. The self compact concrete construction system comprises a self compact concrete mixing plant (10) provided with a material outlet, and a conveying pipeline device (20). A feeding port of the conveying pipeline device (20) is connected to the material outlet, and a pouring port communicating with the feeding port can move to different to-be-pour ports, therefore cranes, and the like are not needed for transporting and the equipment configuration requirement can be reduced, construction cost can be reduced, sedimentation and segregation of the self compact concrete in a concrete tank truck or a transit port can be prevented, and the pouring quality can be guaranteed more reliably.

The invention discloses a cyclic stirring system for solid-liquid mixed mediums in a storage tank. The cyclic stirring system comprises a medium storage tank, wherein a circulating liquid pump inlet pipeline is arranged at the lower end of the medium storage tank; an outlet of a circulating liquid pump is connected with a cyclic stirring device; the cyclic stirring device enters the storage tank from three paths; two stirring spray heads are respectively arranged at the tail end of each of three cyclic stirring pipelines; the six stirring spray heads are respectively positioned on three different levels on two concentric circumferences; the mediums obtain high-enough dynamic energy after being pressurized by the circulating liquid pump and are sprayed out through the six spray heads; circulating liquid sprayed out of the spray heads form tangent angles together with the two concentric circles of the circumference of the storage tank, so that the mediums in the storage tank can obtain high rotation stirring power, and the liquid can rotate in the storage tank. The cyclic stirring system disclosed by the invention can effectively stir the mediums in the storage tank, so that the phenomenon that solid components are deposited at the bottom of the tank due to staying of the mixed mediums is prevented, reduction of the effective volume of the storage tank is avoided, and successful production is guaranteed.

The invention discloses a modifier applied to a plant protein drink and a preparation method of the modifier. The modifier has stronger emulsification capacity, can effectively prevent the plant protein drink from producing grease floating, protein flocculation, sedimentation and layering, and endows the drink with excellent hanging performance and fragrant, smooth and fine taste; and besides, the modifier can further enhance absorption of a human body for nutrients in the plant protein drink, can improve functionality of the drink and effectively improve qualities of taste and flavor of the plant protein drink.

The invention discloses a grinding and degassing discharge tank for fruit juice production, which comprises a discharge cylinder, a juice degassing tank, a grinding hopper, a grinding roller and a nitrogen storage tank, and the bottom side of the juice degassing tank is welded on a frame The inner wall of the upper end of the juice degassing tank is welded with a grinding hopper, the fruit juice degassing tank on the upper part of the grinding hopper is set as a juice distribution cavity, the juice degassing tank on the lower part of the grinding hopper is set as a stirring cavity, the juice A rotating shaft is installed vertically in the middle of the degassing tank, and the rotating shaft passes through the through hole of the rotating shaft in the middle of the grinding hopper; it effectively prevents the juice from being oxidized when sprayed into the juice distribution chamber, contacting oxygen, etc., improves the stability of the juice quality, and has a good grinding effect; It is convenient for oxygen, carbon dioxide and other gases in the pulp cell gap of the juice to escape; to avoid the precipitation and stratification of the pulp in the juice, to improve the uniformity of the juice, to facilitate the degassing treatment of the gas in the juice; to realize the rapid discharge of the juice.

The invention provides a device for effective dephosphorization of dispersive sewage treatment equipment. The device comprises a water inlet, a preparation region and a work region, wherein the preparation region comprises a fixing cavity, a heating cavity and a sub transmission pipeline; the mixing cavity comprises a supplementing passage, a first water outlet and a first rotating shaft; the heating cavity comprises a first connecting opening, a second rotating shaft, a second water outlet and a heating plate; a work cavity comprises a third rotating shaft, a fourth rotating shaft, a rotatingframe and a separation plate; the upper half cavity of the work cavity is provided with a ring sleeve; lime milk is laid on the inner side wall of the sleeve ring; the outer profile dimension of therotating frame is identical to the inner wall dimension of the work cavity; a groove is formed in the side wall of the rotating frame; the groove penetrates through the rotating frame; the groove spirally ascends; crystallization beds are arranged at the upper and lower sides of the groove; the fourth rotating shaft is provided with a stirring blade; the stirring blade is provided with a water pulling sheet. The centrifugation effect is used; the increase of the corresponding ion concentration in the region is caused by tiny dissolution of insoluble subjects, so that precipitates are formed; the dephosphorization efficiency is improved.

The invention relates to a preparation method of a heat-insulating TiO2 / SiO2 composite aerogel material. The preparation method comprises the following steps: A, doping nano TiO2 powder into SiO2 solsubjected to a hydrolysis reaction, carrying out ultrasonic dispersion, and carrying out standing and aging for forming TiO2 / SiO2 composite wet gel; B, soaking the TiO2 / SiO2 composite wet gel in a mixed solution of siloxane / organic solvent / hydrochloric acid; and C, drying the TiO2 / SiO2 composite wet gel treated in the step B at room temperature under normal pressure, carrying out heating treatment, and then carrying out cooling. The composite aerogel rapidly synthesized by the preparation method has a special nano porous structure and excellent mechanical and thermal properties, and the application value and application potential of the material in the fields of photoelectric devices, gas-sensitive sensors, heat-preservation heat-insulation and the like are greatly improved.

The invention discloses a production method for a corona resistant enamel wire. The production method comprises the following steps: firstly, synthesizing polyester with low polymerization degree; reducing an acid value of a polycondensation product to 140-70mg / g as a reaction ending point; adding a nanoscale powder particle subjected to surface activating treatment in the polyester with low polymerization degree and reacting until the acid value of the polycondensation product is reduced to 60-15mg / g as a reacting ending point; and cooling and adding solvent to dilute and obtain a finished product. According to the production method for the corona resistant enamel wire, which is disclosed by the invention, the equipment is simple and the operation process is easy to control; the high dispersity of the powder particle in paint liquid can be maintained; and in addition, long-time aggregation and settlement are avoided.