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152results about How to "Reduce penetration resistance" patented technology
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Soaking plate of foam metal and copper powder compounded capillary structure
InactiveCN101848629AReduce penetration resistanceReduce return lossIndirect heat exchangersCooling/ventilation/heating modificationsCopperThermal contact
The invention discloses a soaking plate of a foam metal and copper powder compounded capillary structure. In the technical scheme, a main body is a vacuum chamber which consists of an upper cover and a lower cover, a compounded capillary structure formed by foam metal and copper powder is arranged in the chamber, the chamber is also filled with a certain quantity of working medium which can boil and transfer heat at a low temperature, the upper cover and the lower cover are both made of deoxidized plate, and the compounded capillary structure is formed through sintering a foam metal plate and copper powder of a certain size. Compared with the traditional capillary structure, the compounded capillary structure has the significant advantages of large lower capillary force, small upper osmotic resistance, accurate control of the capillary force, small thermal contact resistance and the like; and the capillary structures of the upper cover plate and the lower cover plate can be designed as a whole, thereby improving the backflow capacity. Compared with the traditional product, the soaking plate of the foam metal and copper powder compounded capillary structure has the significant advantages of low cost, high irradiating efficiency, long service life and the like when achieving the identical irradiating effect.
Owner:SOUTH CHINA UNIV OF TECH
Ceramic membrane tube support and preparation method thereof
ActiveCN102671550AReduce penetration resistanceImprove osmotic separation efficiencySemi-permeable membranesHigh polymerCeramic membrane
Owner:TSINGHUA UNIV +1
Method for manufacturing lithium ion secondary battery
ActiveCN103825050AHigh peel strengthReduce penetration resistanceElectrode rolling/calenderingFinal product manufactureLithiumMaterials science
Owner:TOYOTA JIDOSHA KK +1
Combined honeycomb ceramic membrane filtering element
The invention discloses a combined honeycomb ceramic membrane filtering element comprising a honeycomb ceramic support body, a filter duct arranged in the support body, a supporting member and a fastener, wherein the honeycomb ceramic support body is in a flat plate shape; the axis of the filter duct and the board of the honeycomb ceramic support body are parallel and are arranged in the honeycomb ceramic support body in parallel to form two or more than two honeycomb ceramic monomers which are overlaid and combined at intervals; the fastener is arranged on the periphery of the combined honeycomb ceramic monomers; and the supporting member is respectively positioned between adjacent honeycomb ceramic monomers and between the fastener and the honeycomb ceramic monomer and is positioned on the port of the filter duct. The combined honeycomb ceramic membrane filtering element has the advantages of higher penetration flux and unit volume membrane area and simple configuration and preparation technology, and ensures that the osmotic resistance is effectively reduced, simultaneously the yield rate of the honeycomb ceramic membrane is greatly improved and the ceramic membrane cost is lowered.
Owner:重庆兀盾纳米科技有限公司
Method for manufacturing lithium ion secondary battery
ActiveUS20140079872A1High peel strengthReduce penetration resistanceElectrode rolling/calenderingFinal product manufactureLithiumMaterials science
A method for manufacturing a lithium ion secondary battery having electrodes in which a mix layer including a first binder and one of a positive electrode active material and a negative electrode active material is formed via a second binder on a collector. The method includes: performing pattern coating of the second binder on the surface of the collector and regularly forming binder-coated sections and uncoated sections; and feeding a powder of mix particles on the binder-coated sections and the uncoated sections so as to form the mix layer on the collector.
Owner:TOYOTA JIDOSHA KK +1
Multi-level back-grasp-type hollow anchor rod and construction method thereof
InactiveCN103572757AIncrease contact areaOutflow smoothlyBulkheads/pilesAnchoring boltsRock boltCement mortar
The invention discloses a multi-level back-grasp-type hollow anchor rod. The multi-level back-grasp-type hollow anchor rod comprises an anchoring rod with a grouting passage inside, an anchor head is fixed at the lower end of the anchoring rod, a plurality of back-grasp buckles are fixed on the anchoring rod, a grout outlet is formed in the anchor head, and the parts, at the upper side of the back-grasp buckles, of the anchoring rod and the parts, at the lower side of the back-grasp buckles, of the anchoring rod are provided with grout outlets and air return holes respectively, and the grout outlets and the air return holes are communicated with the grouting passage. Compared with the construction method of a hard rock body and a soil body, the construction method of the multi-level back-grasp-type hollow anchor rod comprises the steps of (a) preparation of equipment, (b) measurement and distribution of holes, (c) drilling, (d) hole cleaning and detection, (e) inserting of the anchor rod, (f) installation of a grout stop plug, (g) screwing of nuts and (h) grouting, and the anchor rod is directly inserted through the anchor head according to the construction method of a soft soil body, sand and water. The multi-level back-grasp-type hollow anchor rod and the construction method of the multi-level back-grasp-type hollow anchor rod increase the contact area and anchoring force between the anchor rod and the hole wall and prevent the anchor rod from falling out and injuring people. A uniform cement mortar layer can be formed around the anchor rod through the grout outlets and the air return holes, the damage of corrosion is avoided, and the purpose of long-time supporting is achieved.
Owner:SHANDONG JIAOTONG UNIV
Hollow fiber compound nanofiltration membrane and preparation method thereof
InactiveCN104607056AHigh removal rateImprove removal effectSemi-permeable membranesPolyetherimidePolyvinyl alcohol
The invention relates to a hollow fiber compound nanofiltration membrane. The nanofiltration membrane takes a porous supporting layer as an inner layer and a separating function layer as an outer layer. A casting membrane solution of the porous supporting layer contains an inner layer macromolecular polymer which is selected from one or more of polysulfone, polyether sulfone, polyvinylidene fluoride, polyvinyl chloride and polyacrylonitrile; a casting membrane solution of the separating function layer contains an outer layer macromolecular polymer which is selected from one or more of polyetherimide, polyether-ether-ketone, sulfonated polyether-ether-ketone, polymethyl methacrylate and polyvinyl alcohol; a preparation method comprises the following steps: synchronously extruding and molding the inner layer casting membrane solution and the outer layer casting membrane solution; solidifying to obtain a membrane filament in a nascent state; and carrying out an oxidizing agent aqueous solution to obtain the hollow fiber compound nanofiltration membrane. The invention further provides the preparation method of the nanofiltration membrane correspondingly. According to the hollow fiber compound nanofiltration membrane provided by the invention, the flux of the nanofiltration membrane is remarkably improved, and moreover, the nanofiltration membrane further has the certain desalinization rate.
Owner:HUNAN OVAY TECH CO LTD
Method for preparing step micro-needle array
InactiveCN101829394AEffective size controlReduce penetration resistanceMicroneedlesPhotomechanical apparatusSilicon chipSilicon etching
The invention discloses a method for preparing a step micro-needle array in the technical field of biomedical engineering. The method comprises the following steps of: gapping a silicon etching window on a silicon chip through photoetching and performing wet etching on the silicon in the silicon etching window; cutting the silicon chip to obtain a micro square column array by using a slicing machine, and further cutting the micro square column array to obtain micro square blocks; and finally performing the wet etching on the micro square column array to obtain the step micro-needle array. Micro-needle arrays with different heights are prepared by the method, and the micro-needle arrays puncture into the skin in a progressive mode. Meanwhile, the method has the advantage of simple preparation process, and the step micro-needle array is prepared by adopting the method of combining the wet etching with machining, so the cost is low and the method is convenient to popularize.
Owner:SHANGHAI JIAO TONG UNIV
Preparation of FeAl intermetallic compound porous material
The invention relates to a preparation method for FeAl intermetallic compound porous material, which belongs to the field of inorganic porous material. The technical problem solved by the invention is to provide the preparation method for the FeAl intermetallic compound porous material with a pore structure having higher controllability. The method comprises the following steps: firstly preparing a porous supporting body and composite slurry; then coating the surface of the porous supporting body with the composite slurry; and sintering and cooling down the porous supporting body in the vacuum atmosphere to obtain the FeAl intermetallic compound porous material. The method capable of regulating the porous structure of the porous material is characterized by a short flow, low cost and low energy consumption. The porous material has excellent resistance to high temperature sulfurization, resistance to high temperature oxidation and thermal shock, good mechanical performance at a high temperature, good processability and solderability, and the like. Therefore, the FeAl intermetallic compound porous material has bright application prospect.
Owner:CHENGDU INTERMENT TECH
Flat heat pipe with multi-channel sintered supporting structure and manufacturing method thereof
InactiveCN105973045ARaise the capillary limitReduce penetration resistanceIndirect heat exchangersRefluxCapillary pressure
The invention discloses a flat heat pipe with a multi-channel sintered supporting structure and a manufacturing method thereof. The flat heat pipe comprises an upper metal cover plate and a lower metal cover plate, wherein a sealed cavity is formed between the upper metal cover plate and the lower metal cover plate through welding sealing; the cavity is filled with a liquid working medium; the inner surface of the cavity is divided into an evaporation surface and a condensation surface; thin-layer porous liquid absorption core structures formed through sintering metal powder particles are laid on the evaporation surface and the condensation surface; support pillars arranged in an array are formed on the evaporation surface through sintering; cylindrical holes which are matched with cylindrical bosses at the top ends of the support pillars are processed in the condensation surface; and the cylindrical bosses and the cylindrical holes are matched in an embedded manner to form working medium reflux channels. According to the flat heat pipe, the capillary pressure is improved, axial channels formed in the sintered support pillars provide the good working medium reflux channels, the liquid reflux resistance is reduced, the working medium reflux speed is remarkably increased, the separation of gas and liquid phases is achieved, the heat transfer performance is improved, and the support pillars can effectively prevent the problems that the flat heat pipe collapses and deforms, and the like.
Owner:广东省惠州市质量计量监督检测所 +1
Forward osmosis membrane based on interface hydrophilic modification and preparation method of forward osmosis membrane
ActiveCN105195027AReduce penetration resistanceReduce tortuositySemi-permeable membranesPolyesterPolymer science
The invention discloses a forward osmosis membrane based on interface hydrophilic modification. The forward osmosis membrane comprises a separation peel layer arranged on the surface, a porous support layer arranged in the middle and a non-woven fabric support material arranged at the lower part. The forward osmosis membrane is characterized in that a hydrophilic polymer layer is also arranged between the porous support layer and the non-woven fabric support material, and is embedded into the non-woven fabric support material; the non-woven fabric support material is made of polyolefin or polyester. The hydrophilic polymer can also be interlinked through a crosslinking agent. The forward osmosis membrane has the advantages that through the hydrophilic modification, on the one hand, the permeation resistance of water in a permeation process is reduced, and the water flux is improved, and on the other hand, in a phase inversion process, the water can easily permeate, so that an instant phase inversion can be more easily generated; a large pore structure is formed; the porosity is improved; the sinuosity of pores is reduced, so that the inner concentration polarization can be obviously reduced; the water flux of the membrane is improved.
Owner:OCEAN UNIV OF CHINA +1
Composite membrane for water treatment, and preparation method thereof
InactiveCN106345318ASimple film making processImprove hydrophilicitySemi-permeable membranesMembranesHydrogen atomCyclodextrin
The invention discloses a composite membrane for water treatment, and a preparation method thereof. The composite membrane comprises a polymer supporting layer and a polyamide active layer, wherein the polyamide active layer comprises polymerized cyclodextrin amine derivatives and polyacyl chloride; and the cyclodextrin amine derivatives comprise at least two substituent groups shown in the formula I, wherein R is a hydrogen atom or organic amine of C1 to C 6. The composite membrane is prepared by performing interfacial polymerization to cyclodextrin amine derivatives and polyacyl chloride, so that the membrane production technology is greatly simplified; the annular cavities of the cyclodextrin amine derivatives are embedded in the polyamide active layer of the composite membrane, so that the permeation resistance of water molecules can be reduced, and the permeation of the polyamide active layer is improved; and the composite membrane with high water throughout and good hydrophilicity can be obtained.
Owner:HUAZHONG UNIV OF SCI & TECH
Construction method of large-diameter crushed stone pile
ActiveCN102888834AReduce penetration resistanceReduce equipment performance requirementsSoil preservationThin walledEngineering
Owner:SHANGHAI SHEN YUAN GEOTECHN +2
Novel cardiac valve implantation instrument with anchoring device
ActiveCN104055603AImprove the success rate of entryAchieving Elastic AdaptabilityStentsHeart valvesAutologous tissueTreatment success
The invention relates to a novel cardiac valve implantation instrument with an anchoring device. The novel cardiac valve implantation instrument comprises a cardiac valve prosthesis, at least two sets of anchoring needles and at least two sets of anchoring needle releasing devices detachably connected with the cardiac valve prosthesis. The far ends of the anchoring needles are in preset shapes, the anchoring needle releasing devices comprise conveying pipes, push rods and hollow guide rails, the guide rails are arranged in the conveying pipes in advance and can move towards the far ends of the conveying pipes, rigid sections are arranged at the far ends of the guide rails, the anchoring needles are arranged in the guide rails in advance in an extension state, the push rods are arranged in the conveying pipes and located at the near ends of the anchoring needles, the far ends of the anchoring needle releasing devices are in preset shapes, the far ends of the conveying pipes can be overall bent or partially bent, the guide rails and the anchoring needles can move towards the far ends of the conveying pipes under the action of external force, and the cardiac valve prosthesis is fixedly arranged between the autologous tissue and the anti-falling ends of the anchoring needles. The novel cardiac valve implantation instrument can achieve accurate locating and firm anchoring, and the treatment success rate is improved.
Owner:NINGBO JENSCARE BIOTECHNOLOGY CO LTD
Non-layered cross-linked graphene oxide film as well as preparation method and application thereof
The invention discloses a preparation method of a non-layered cross-linked graphene oxide film. The preparation method comprises the following steps: firstly mixing poly-ammonia or an amino-terminated polymer with a graphene oxide water dispersion solution; uniformly dispersing to form graphene oxide sol; dropwise adding the graphene oxide sol into a substrate; and hermetically arranging at the temperature of 70 to 90 DEG C to obtain the non-layered cross-linked graphene oxide film. In the non-layered cross-linked graphene oxide film prepared by the method disclosed by the invention, a graphene oxide nanometer plate layer is formed by crosslinking the poly-ammonia and the amino-terminated polymer and is in irregular disordered orientation; the non-layered cross-linked graphene oxide film has super-hydrophilic properties and super-oleophobic properties underwater, high throughput and good pollution resistance and is suitable for separation of oil and water emulsion at normal pressure.
Owner:ZHEJIANG UNIV
Method for preparing NaA molecular sieve membrane by inner surface of asymmetric micro-pore ceramic
ActiveCN106478079AReduce penetration resistancePrevent subsidenceCeramicwareMolecular sieveChemical physics
The invention belongs to the technical field of preparation of molecular sieve membranes and in particular relates to a method for preparing a NaA molecular sieve membrane by an inner surface of asymmetric micro-pore ceramic. The method comprises: taking polyhedron aluminum oxide powder as aggregate, and uniformly mixing and stirring the aggregate with a binding agent, water, a moisturizing agent and a dispersant to form mud; sintering the mud to obtain a porous carrier A; coating a suspension solution to the inner surface of the carrier A for decorating by adopting a dipping and lifting process; drying, sintering and keeping the heat to obtain a molecular sieve membrane supporting body B; fixing the molecular sieve membrane supporting body B into a reaction kettle containing molecular sieve membrane crystallization liquid; carrying out upper and lower rotary hydrothermal synthesis to obtain the NaA molecular sieve membrane. By adopting the method provided by the invention, the surface of the supporting body is more flat and the pore diameter distribution is uniform; the possibility that molecular sieve crystal grains are sunk into macro-pores of the carrier is avoided; the prepared molecular sieve membrane has relatively low permeation resistance and the separation efficiency is improved.
Owner:山东硅元膜材料科技有限公司 +3
Grinding or polishing apparatus and method for operating it
InactiveUS20120021674A1Reduce penetration resistanceShorten the timePolishing machinesGrinding work supportsEngineeringMechanical engineering
A grinding or polishing apparatus and method for grinding or polishing at least one workpiece, in particular having a ferromagnetic property, by way of barrel finishing, having at least one pot-like treatment container, mounted so as to be able to oscillate, for receiving one or more workpieces and grinding or polishing elements, also having at least one workpiece anchoring device for disposing one or more workpieces within the treatment container and for connecting the workpieces to the treatment container in a releasably secured manner, and also having at least one oscillation exciter, by means of which the treatment container can be oscillated, and in that the workpiece anchoring device comprises at least one switchable clamping plate, in particular at least one clamping plate having one or more permanent electromagnets, which is adapted such that a magnetic field emanating outwardly from a clamping surface of the clamping plate can be selectively activated or deactivated.
Owner:WALTHER TROWAL
Flat heat pipe liquid suction core provided with fins and embedded grooves and manufacturing method thereof
InactiveCN104864755AIncrease disturbanceIncrease the heat exchange areaIndirect heat exchangersCapillary pressureMarine engineering
The invention discloses a flat heat pipe liquid suction core provided with fins and embedded grooves and a manufacturing method thereof. The flat heat pipe liquid suction core comprises a metal evaporation plate, wherein multiple first embedded grooves and multiple second embedded grooves which are arranged at intervals and distributed in a staggered mode in the first direction and the second direction and multiple fins distributed in an array mode are arranged on the evaporation face of the metal evaporation plate, and each first embedded groove and each second embedded groove respectively comprises a groove body forming a groove cavity and a vertical gap forming a groove opening. Each fin comprises a fin body and a supporting boss and is formed by the gaps and internal groove bodies of the corresponding first embedded groove and the corresponding second embedded groove in a staggered mode. The liquid suction core can increase heat exchange area, promote boiling for nucleus formation, enhance boiling heat transfer, improve capillary pressure and reduce backflow resistance. During manufacture, a ball-end milling cutter is utilized to mill the embedded grooves in the first direction, and a base plate is turned to mill the embedded grooves in the second direction and meanwhile form a fin structure. The flat heat pipe liquid suction core is simple in manufacturing process and low in machining cost and can remarkably strengthen heat transfer.
Owner:XIAMEN UNIV
Method for preparing high-throughput ultrafiltration membrane from nano calcium carbonate doped polysulfone
InactiveCN106693731AHigh porosityImprove throughputSemi-permeable membranesMembranesUltrafiltrationReverse osmosis
The invention discloses a method for preparing a high-throughput ultrafiltration membrane from nano calcium carbonate doped polysulfone. The method comprises the steps of taking the polysulfone as a polymer membrane material and nano calcium carbonate as a doped particle to prepare membrane casting liquid, preparing a membrane by a nonsolvent-induced phase separation method, and treating with a hydrochloric acid aqueous solution at a certain concentration for a period of time to form the high-throughput ultrafiltration membrane. The prepared ultrafiltration membrane can be used for ultrafiltration and serve as a basement membrane for preparing a nanofiltration and reverse osmosis composite membrane. The throughput of the ultrafiltration membrane is greater than that of the pure polysulfone under the same pressure, and an entrapment rate of bovine serum albumin is not changed basically.
Owner:TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
High selective separability nanofiltration membrane preparation method
The invention discloses a high selective separability nanofiltration membrane preparation method which comprises the following steps: (1) preparing a separation layer with high flux and a low inorganic salt removing rate; (2) preparing a separation layer with high negative charge density. The high selective separability nanofiltration membrane preparation method disclosed by the invention has theadvantages that the defined amount of dendritic polyfunctional group membrane material is added into a water phase solution to form a polypiperazine-amide separation layer with smaller osmotic resistance; then interface polymerization reaction is utilized to finish residual acyl chloride groups on the surface of an initial polypiperazine-amide membrane, reacting with strong-electronegativity compound containing hydroxyl or amino and utilizing a chemical bond mode to durably enhance membrane surface electronegativity to obtain a high selective separability nanofiltration membrane. In addition,as the introduced strong-electronegativity compound contains sulfonic acid groups or phosphate groups, an isoelectric point is lower than that of a general polypiperazine-amide nanofiltration membrane, and the electronegativity of the membrane surface can be kept under a lower pH value; thus, a wider pH value application range is obtained.
Owner:杭州奈诺膜环境技术有限公司
Offshore wind turbine single pile foundation with radial rib plates and anti-scouring cover
ActiveCN112177031AGuaranteed verticalitySimple structureProtective foundationElectric machineryStructural engineering
The invention provides an offshore wind turbine single pile foundation with radial rib plates and an anti-scouring cover. The offshore wind turbine single pile foundation comprises a tubular pile, a cylinder part and a conical cover body, wherein the tubular pile is a hollow cylinder; multiple rib plates are arranged on the outer side wall of the tubular pile, and are outwards distributed in a radial form along the outer side wall of the tubular pile; the cylinder part coats the outer sides of the rib plates, and is connected with the tubular pile through the rib plates; the inner wall of thecylinder part is connected with the upper edges of the rib plates to enhance the integrity of the single pile foundation; the conical cover body is used for preventing waves from scouring a seabed, coats the tubular pile, and is positioned above the cylinder part; a large end of the conical cover body is contacted with the cylinder part; the outer diameter of the large end of the conical cover body is matched with the outer diameter of the cylinder part; and the inner diameter of a small end of the conical cover body is matched with the outer diameter of the tubular pile. The offshore wind turbine single pile foundation improves the bearing capacity and the antiskid and anti-overturning stability of the single pile foundation, and meanwhile, can prevent scouring through setting the conicalcover body to improve the stability and the anti-scouring capacity.
Owner:SHANGHAI JIAO TONG UNIV
Method for preparing super-high-bulk paper pulp from fir slabs
ActiveCN104711884AReasonable useImprove toughnessPretreatment with water/steamPretreatment with alkaline reacting compoundsPulp and paper industryCompressibility
The invention discloses a method for preparing super-high-bulk paper pulp from fir slabs. The method is a process for producing bleached pulp boards according to the chemical hot-grinding technology, and comprises the following steps: slicing, pre-boiling, extruding, soaking, pre-heating, defibrination, secondary defibrination, screening and purifying, bleaching and papermaking. The method has the advantages that the prepared paper pulp is high yield, bulk, whiteness, drainability, tenacity, stiffness, ink absorption and compressibility, so that the print performance of the prepared paper pulp can be improved; the production cost and the sewage emission are low; the sewage is easy to treat; the prepared paper pulp can be used for producing of light paper, cup base paper and other types of paper requiring high bulk.
Owner:福建腾荣达制浆有限公司
Method for constructing soil ploughing layer of south-Xinjiang oasis drop-irrigation continuous-cropping middle-low-yield cotton field
ActiveCN106613263ANo premature agingReduce penetration resistancePlant cultivationCultivating equipmentsContinuous croppingSoil porosity
The invention relates to a method for constructing a soil ploughing layer of a south-Xinjiang oasis drop-irrigation continuous-cropping middle-low-yield cotton field. The method includes the steps that before sowing in the cotton field, straw of last crops is smashed and returned to the field; farmyard manure and chemical fertilizer are applied; deep ploughing, cotton field flattening and super-deep scarification are conducted; irrigation is conducted before sowing; sowing is conducted; furrows are dug in the cotton field, and anti-salt plants are planted; a windbreak tree belt is built on the periphery of the cotton field; a water-irrigation and drainage trench system is built; field management is conducted. After the method is adopted, the surveying result shows that the soil water content in the seedling stage is increased by 0.5%, rapidly-available potassium of the ploughing layer is increased by 35.2%, the temperature of soil 5 cm lower than films is increased by 0.6 DEG C, the thickness of the ploughing layer in the seedling period is increased by 7.1 cm, the salt content of soil is reduced by 2.1 g / kg, the soil porosity is increased by 8.5%, the soil penetration resistance (PSI) is reduced by 130, the soil bulk density is reduced by 0.11 g / cm<3>, the pH value of soil is reduced by 0.4, the residual film content of soil of the ploughing layer is reduced by 11.3 kg per mu, premature senescence of the cotton field is avoided, the yield of seed cotton is increased by 57.5 kg per mu, and therefore the method has the soil-improving and yield-increasing effects and can meet production requirements.
Owner:ECONOMIC CROPS RES INST XINJIANG ACAD OF AGRI SCI +2
Intermittent ultrasonic assisted low-salt salted egg pickling technology
InactiveCN108634228AIncrease pickling ratePickling rate shortenedFood scienceUltrasonic assistedSalt content
The invention discloses an intermittent ultrasonic assisted low-salt salted egg pickling technology. Low-salt salted eggs can be obtained with the technology through pretreatment of duck eggs, pickling of duck eggs, desalting and cleaning. An ultrasonic technology is creatively used in assisting the salted egg pickling process, the table salt permeation rate is increased, the pickling period is shortened, the salted eggs can be well pickled within 15 days with the technology, and the pickling period is 20 days shorter than that in a traditional method. The well pickled salted eggs are placed in a 1% table salt solution to be desalted, the salt content of salted egg white can be decreased to 3.58% within 6 days, and the salinity is proper. In general, salted eggs with high oil yield and lowsalt can be pickled within 21 days.
Owner:HUAZHONG AGRI UNIV
Preparation method of glass hollow fiber nanofiltration membrane with asymmetric pore structure
ActiveCN103752187AReduce penetration resistanceHigh permeation fluxSemi-permeable membranesPolymer solutionCompound c
The invention relates to a preparation method of a glass hollow fiber nanofiltration membrane with an asymmetric pore structure. The method comprises the following steps: preparing sodium borosilicate glass after fusing a sodium salt A, a boron compound B and a silicon compound C, and then crushing, ball-milling and sieving to obtain sodium borosilicate glass powder; preparing a polymer solution, adding the glass powder to the polymer solution, stirring to evenly disperse, so as to obtain a spinning solution; carrying out stewing and defoaming treatment; extruding from a spinning nozzle under the pressure action of nitrogen; enabling the spinning solution to enter a coagulating bath, so as to obtain a hollow fiber membrane green body; soaking the green body into running water, so that an organic solvent is fully dissolved into water; drying the hollow fiber membrane green body and then processing by a sintering technology, so as to obtain the hollow fiber membrane green body; putting the membrane into an acid liquor to corrode, so as to obtain the glass hollow fiber nanofiltration membrane with the asymmetric pore structure. The method disclosed by the invention is simple in technology, free of expensive equipment, and low in sintering temperature, and the prepared glass hollow fiber nanofiltration membrane has the asymmetric pore structure, and can be applied to the fields such as gas separation and ion separation.
Owner:天津鼎芯膜科技有限公司
High-intensity water-resistance corrugated board and preparation method thereof
ActiveCN103103891AHigh water resistance strengthStrong water resistanceNon-fibrous pulp additionMechanical working/deformationCardboardAdhesive
The invention discloses a high-intensity water-resistance corrugated board and a preparation method of the high-intensity water-resistance corrugated board according to the national standard GB / T22873-2008. The high-intensity water-resistance corrugated board comprises surface paper and inner paper, wherein a corrugated paper layer is arranged between the surface paper and the inner paper; a high-intensity water-resistance adhesive is coated between the peak surface of the corrugated paper layer and the surface paper as well as the inner paper; a special water-resistance additive is added into the conventional corrugated board adhesive; and various technological parameters of a board automatic line are optimized by an ultrafine particle pulping technology, so that the water resistance of the corrugated board is greatly improved and is much higher than the advanced level of products of the same type in foreign countries.
Owner:DACHENG PACKAGING PROD SUZHOU
Film casting solution of PVDF hollow fiber ultrafiltration film as well as spinning mechanism and production method
The invention discloses a film casting solution of a PVDF hollow fiber ultrafiltration film as well as a spinning mechanism and a production method, and belongs to the technical field of polymer filmpreparation. The method comprises the following steps: 1) preparing the film casting solution, namely heating a stirring kettle to 110-150 DEG C in advance, adding PVDF, a poor solvent, a water-soluble good solvent and an additive into the stirring kettle, stirring and dissolving to form a uniform and transparent viscous solution, reducing the stirring speed, and defoaming the film casting solution for 8-12 hours in a heat preservation state; and 2) performing composite film spinning: spinning by using a dry-wet spinning machine by adopting a composite thermally induced phase separation methodto prepare the PVDF hollow fiber ultrafiltration film. The invention relates to the film casting solution of the PVDF hollow fiber ultrafiltration film as well as the spinning mechanism and the production method. Microstructures and crystal forms of surfaces and sections of film filaments are regulated and controlled through process parameter control, and the hollow fiber composite film which iscompact in surface layer, has spongy penetrating network pore structure in lower layer and is tightly combined with a supporting pipe is prepared.
Owner:浙江易膜新材料科技有限公司
Sponge loaded type organic solvent absorbent and preparation method thereof
ActiveCN106925238AHigh porosityReduce penetration resistanceOther chemical processesAlkali metal oxides/hydroxidesPorosityFunctional monomer
The invention discloses a sponge loaded type organic solvent absorbent and a preparation method thereof. The absorbent contains the following raw materials: 1-10 parts of modified sponge, 5-15 parts of styrene, 15-40 parts of acrylics, 0.2-2 parts of functional monomer, 0.5-5 parts of emulgator, 0.2-2 parts of cross-linking agent, 0.1-1 part of initiator and 30-80 parts of water. The preparation process is as follows: adopting an emulsion polymerization method for preparing an emulsion type high oil-absorptive resin containing an epoxy functional group, and meanwhile, chemically modifying a polymeric sponge, grafting and compounding the emulsion type high oil-absorptive resin with the polymeric sponge, thereby acquiring the sponge loaded type organic solvent absorbent. The absorbent disclosed by the invention has the characteristics of polymeric sponge and oil-absorptive resin, has an excellent absorptive character, is free from obvious deformation after absorption and has a certain mechanical strength and flexibility; due to a specific high-porosity skeleton structure of the polymeric sponge, the osmotic resistance in practical application is small, a pore structure can be kept after absorption and the full contact of the wastewater effluent and absorbent is benefited; the industrial applicability is excellent; the development prospect is wide.
Owner:FUZHOU UNIV
Preparation method of high-purity alumina plate ceramic membrane support
The invention provides a preparation method of a high-purity alumina plate ceramic membrane support. The preparation method comprises steps as follows: step one, zirconium nitrate is put into deionized water and is heated and stirred; step two, powder of alumina a, alumina b, lanthanum oxide and yttrium oxide is added to a kneading machine proportionally for mixing; step three, mixtures obtained in the step one and the step two are mixed; step four, dextrin, PVA (polyvinyl acetate), glycerin and tung oil are weighed proportionally and mixed sufficiently, a mixture is added to a material obtained in the step three for mixing, and a pug material is obtained; step five, the pug material is transferred to a pug mill and subjected to pugging and then is fed into an extruder, and an extruded blank is air-dried naturally; step six, the blank is placed into an oven for drying and then is placed in a kiln for sintering. The alumina content of the plate ceramic membrane support prepared with the method is 99% or higher, and while the anti-corrosion strength of the support is greatly improved and the service life of a ceramic membrane is greatly prolonged, long-term stable usage of the ceramic membrane under a strong alkali system can be guaranteed.
Owner:上海硅苑膜科技有限公司 +1
Medical electrode needle device
InactiveCN1964675AAvoid mobilityPrevent disengagementSurgical needlesSurgical instruments for heatingPolyolefinSynthetic resin
A thermocouple (6) for detecting the temperature of the tip end of an electrode needle (1) is provided. The thermocouple (6) is provided with a tip end connecting portion (18) at which the tip ends of a pair of coated elemental wires (8, 9) are connected together electrically, and a tip end coating portion formed by coating the tip end connecting portion (18) with polyolefin synthetic resin. The tip end coating portion is bonded and fixed to the electrode needle (1). Accordingly, a medical electrode needle device is provided which is formed compact by providing a thermocouple to an electrode needle, and can very accurately detect temperatures by means of a thermocouple.
Owner:KK TOPCON
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