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411 results about "Wetting" patented technology

Wetting is the ability of a liquid to maintain contact with a solid surface, resulting from intermolecular interactions when the two are brought together. The degree of wetting (wettability) is determined by a force balance between adhesive and cohesive forces. Wetting deals with the three phases of materials: gas, liquid, and solid. It is now a center of attention in nanotechnology and nanoscience studies due to the advent of many nanomaterials in the past two decades (e.g. graphene, carbon nanotube, boron nitride nanomesh).

Absorbent article with spacer element

An absorbent article having a front edge intended to be positioned at a front side of a person and a rear edge intended to be positioned at a rear side of a person, said absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent material between said topsheet and said backsheet, wherein at least a first spacer element is included between said topsheet and said backsheet, wherein the first spacer element has a top side facing the topsheet, a bottom side facing the backsheet, and a number of lateral sides between the top and the bottom side, and wherein the absorbent material extends along at least two opposite lateral sides of the first spacer element; said first spacer element being configured to guide liquid to the absorbent material upon wetting of the absorbent article.
Owner:DRYLOCK TECHNOLOGIES NV

Surface coating process detection method and device for steel pipe production

The invention relates to the technical field of steel pipe detection, and discloses a surface coating process detection method and device for steel pipe production, and the method comprises the steps: obtaining surface topography data and temperature distribution data; performing roughness analysis according to the surface topography data to obtain roughness parameters; performing wetting simulation according to the roughness parameter and a preset initial condition to obtain permeation data and a stress distribution result; parameter optimization is carried out according to the permeation data and the stress distribution result, the spraying pressure adjustment amount and the spraying angle adjustment amount are obtained through calculation, and then optimal spraying parameters are obtained; inputting the temperature distribution data into a thermal stress distribution model to obtain thermal stress distribution data, and performing process optimization according to the thermal stress distribution data to obtain optimal curing parameters; and processing the coating on the surface of the steel pipe according to the optimal curing parameters and the optimal spraying parameters. The method has the following effect that the detection precision of the surface coating of the steel pipe can be improved.
Owner:SHENZHEN XINXINGRONG BUILDING MATERIALS CO LTD

Composite material additive manufacturing method and equipment based on size error compensation

The invention provides a composite material additive manufacturing method and device based on size error compensation, and the method comprises the steps: selecting the number, type and combination mode of materials needed by each layered structure strip according to the material performance of a prepared component and the local thermodynamic performance and mechanical performance of the component; all strips of the single layered structure are laid at the same time or in each round, so that the single layered structure is formed; each strip is made of a single type of material or is formed by laminating and compounding a plurality of single type of materials, and the self-adaptive laying method is executed according to data of various sensors in the laying process and data of a detection mechanism after laying; and the steps are repeated, and the strips are laid layer by layer according to the layer sequence of the layered structure till the component is formed. According to the method, through effective combination of additive manufacturing modes of multiple fiber composite materials, multiple materials are combined and then laid, and it is ensured that the distribution of fibers and the infiltration effect of a matrix reach the ideal state.
Owner:EAST CHINA UNIV OF SCI & TECH

Efficient mixing equipment

The present application discloses an efficient stirring device 100, which includes a stirring tank body 101 forming an inner tank space to accommodate a mixture of powder materials and liquid materials; a stirring paddle103 and a stirring main shaft 104, at least a portion of which is disposed within the inner tank space and rotates around a central axis; a stirring motor 105; and the efficient stirring device further includes: a plurality of scraping members 101 rotatably disposed within the inner tank space to scrape off the mixture adhering to the inner wall of the stirring tank body when rotating on their own axes; a plurality of transmission shafts 107, at least a portion of which is disposed within the inner tank space; a power main shaft 108 for driving the transmission shafts to rotate on their own axes and to revolve around the central axis; and a scraping motor 109 for driving the scraping main shaft to rotate. Among them, the scraping members are connected to the transmission shafts in a non-rotating manner to move with the transmission shafts, and the transmission shafts are disposed parallel to the power main shaft. The advantage of the present application is that it provides an efficient stirring device that improves the wetting efficiency by disposing scraping members within the inner tank space that rotate on their own axes and revolve to scrape off the mixture adhering to the inner wall of the stirring tank body.
Owner:CHEN QING

Preparation method and application of composite micro-groove super-hydrophobic low-ice-adhesion photo-thermal film

The invention discloses a preparation method of a composite micro-groove super-hydrophobic low-ice-adhesion photo-thermal film. The preparation method comprises the following steps: (1) constructing a low-elasticity-modulus photo-thermal composite sponge substrate through a solvothermal method; (2) uniformly coating the surface of a substrate with a polydimethylsiloxane (PDMS) precursor solution by adopting an aerosol-assisted deposition technology, and carrying out thermocuring to form a functional composite interface layer; and (3) constructing a multi-stage scallop surface-imitating micro-nano groove composite structure on the surface of the interface layer by using a femtosecond laser micro-nano processing technology. The prepared film has super-hydrophobicity, the surface of the film is in a Cassie-Baxter wetting state with a 164-degree contact angle and a 1-degree rolling angle, and the film has a surface self-cleaning function. Under the icing condition, the adhesion strength of an ice layer of the system is obviously reduced to 2.57 kPa, the static delay icing time is effectively prolonged to 1587 s, and the system has the photo-thermal response characteristic and can realize rapid icing ablation under the standard solar irradiance; the preparation method has the characteristics of high process controllability, environment friendliness and the like, and is suitable for large-scale continuous production.
Owner:SOUTHWEAT UNIV OF SCI & TECH

Efficient soldering flux and preparation method thereof

The invention belongs to the technical field of welding materials, and particularly relates to efficient scaling powder and a preparation method thereof. The efficient scaling powder is composed of, by mass, 4%-10% of organic acid activating agents, 1%-2% of thiourea reinforcing agents, 0.15%-0.3% of wetting agents, 0.2%-0.6% of antioxidants, 0.3%-0.5% of surfactants, 0.05%-0.2% of defoaming agents, 3%-5% of film forming agents, 10%-15% of solvents and the balance water. The prepared scaling powder has good spreadability, stability, corrosion resistance and the like.
Owner:GUANGDONG JIANXIN TECH CO LTD

Photovoltaic profile and preparation method and application thereof

The invention belongs to the technical field of photovoltaic materials, and provides a photovoltaic profile and a preparation method and application thereof. The preparation method comprises the following steps: carrying out surface conditioning and phosphorization on a steel substrate (carbon steel or recycled steel or low alloy steel), carrying out electrophoretic deposition by using epoxy thermosetting electrophoretic primer, and pre-drying; the outer surface of a workpiece is coated with fluorocarbon finish paint (the fluorocarbon finish paint comprises the following raw materials in specific content: polyester resin with a certain viscosity hydroxyl value, fluorocarbon resin with a certain viscosity hydroxyl value, pigment filler, an organic solvent, a wetting leveling agent, a dispersing agent, a defoaming agent, an adhesion promoter and an aliphatic isocyanate curing agent), and curing is performed. And an electrophoretic primer layer with the thickness of 15-25 microns and a fluorocarbon finish layer with the thickness of 20-30 microns are formed on the outer surface of the steel substrate through curing. According to the photovoltaic profile, the electrophoretic primer layer and the fluorocarbon finish paint layer are formed on the low-cost steel substrate through one-time curing, the process can be simplified, the cost can be reduced, the paint layer is thin, and the photovoltaic profile further has long-term excellent adhesive force, aging resistance, corrosion resistance, weather resistance, gloss retention and the like.
Owner:JOLYWOOD SUZHOU SUNWATT

Super-amphiphobic high-reflection coating and preparation method thereof

The invention provides a preparation method of a super-amphiphobic high-reflection coating, and relates to the technical field of self-cleaning materials. A one-step method is adopted, and the core is to prepare functional super-amphiphobic particles with micro-nano structures. A micro-nano composite structure is constructed by a method of regrowing silicon dioxide on the surfaces of micron-scale barium sulfate, titanium dioxide or calcium carbonate particles, and then surface modification is performed to prepare the super-amphiphobic particles. And mixing the prepared particles with a water-based emulsion, alcohol-soluble or ester-soluble resin, a coalescing agent, a defoaming agent, a wetting leveling agent and an adhesive according to a certain ratio to prepare the coating. And finally, a coating with high reflectivity and super-amphiphobic performance is formed on the surface of the substrate, so that the contact angle of water drops and oil drops on the surface of the material is greater than 150 degrees.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Preparation method of water-based bi-component epoxy primer

The preparation method comprises the following steps: weighing raw materials in parts by weight: firstly weighing raw materials of a component A: 35-45 parts of epoxy resin, 10-15 parts of a modified functional agent, 5-8 parts of a carbon nanotube regulator, 4-7 parts of a flame retardant, 4-6 parts of a silane coupling agent, 2-5 parts of a wetting dispersant and 20-30 parts of water; the waterborne two-component epoxy primer is prepared by mixing the component A and the component B, the component A is prepared by blending the epoxy resin with the flame retardant, the silane coupling agent and the wetting dispersant, and meanwhile, the modified functional agent and the carbon nanotube regulator are added for cooperation and synergism, so that the flame-retardant and flame-retardant waterborne two-component epoxy primer is prepared through co-cooperation and synergism of the raw materials; the flame retardance, adhesive force and impact resistance balance coordination of the product are optimized, and meanwhile, the corrosion resistance and weather resistance durability effect of the product is remarkable.
Owner:JIANGXI COPPER IND GROUP (DEXING) BUILDING MATERIALS CO LTD

Preparation method of water-washing removable PETG label adhesive and application of product of water-washing removable PETG label adhesive

The invention belongs to the technical field of thermal shrinkage label films, and particularly relates to a preparation method of a water-washing removable PETG label adhesive and application of a product of the water-washing removable PETG label adhesive, the water-washing removable PETG label adhesive is formed by adopting an emulsion polymerization method on the basis of PSt / P (BA-MMA) core-shell structure emulsion, and the application of the adhesive in PETG labels is provided. The problems that an existing adhesive is high in adhesive capacity and serious in residue are solved, the balance of adhesive force and cohesive force is achieved through the core-shell microsphere structure, the wetting power with a base material is reduced, the compatibility with the base material is reduced, and the performance that the adhesive is removed by washing is improved.
Owner:JIANGSU GUANGHUI PACKAGE

Oil gas shaft crack plugging pressure repairing material and method based on microwave heating bismuth-based alloy

The invention belongs to the field of oil and gas exploitation, geothermal exploitation and deep ground engineering, and discloses an oil and gas shaft crack plugging pressure repair material and method based on microwave heating bismuth-based alloy, the material comprises 74%-86% of bismuth-based alloy powder, 10%-15% of Fe3O4-SiO2 core-shell magnetic particles, 3%-8% of a microwave sensitizer and 1%-3% of a wetting agent. The repairing material is conveyed to the position, where shaft crack plugging repairing needs to be conducted, in the oil and gas shaft, then the repairing material is melted in a microwave heating mode, then the melted alloy is filled in shaft crack plugging, and then a rotating gradient magnetic field is used for repairing the oil and gas shaft crack. And the liquid alloy is driven to directionally migrate to a target crack area along the magnetic line, and after alloy liquid is cooled and solidified, pressure repairing of the oil and gas shaft crack plugging target position is achieved. Precise positioning, efficient filling, phase change control and complete recovery of the repairing material can be achieved in the extremely deep environment, and therefore the high-quality repairing requirement for oil and gas shaft crack plugging pressure repairing achieved through efficient liquefaction of plugging metal can be met.
Owner:XI'AN PETROLEUM UNIVERSITY

High-temperature-resistant ceramic coating slurry and application thereof

The invention discloses high-temperature-resistant ceramic coating slurry and application thereof, and relates to the technical field of secondary batteries, the high-temperature-resistant ceramic coating slurry comprises ceramic particles, a PAA binder, a composite emulsion, a wetting agent and water as a solvent; the addition mass ratio of the ceramic particles to the PAA binder to the composite emulsion to the wetting agent is 1: (0.5-2): (5-10): (0.05-0.2); the adding mass percentage of the ceramic particles is 30-50%. The heat resistance of the prepared ceramic coating is remarkably improved, so that the effect of improving the use safety of the battery is achieved. Based on the corresponding components, the obtained ceramic coating forms a heat-resistant PAA framework and a composite body which are mixed to coat ceramic particles, and the effect of remarkably improving the heat resistance is further achieved.
Owner:宁波大浦新材料科技有限公司

Preparation method of hard alloy material based on high-entropy alloy bonding phase

The invention provides a preparation method of a hard alloy material based on a high-entropy alloy bonding phase, and relates to the field of hard alloy materials, and the preparation method comprises the steps of S1, tungsten carbide powder pretreatment, S2, preparation of a WC-coated TiN core-shell structure, S3, in-situ synthesis of an interface wetting agent (Ti, Zr, Mo) CN, S4, wet high-energy ball milling and mixing, and S5, preparation of the hard alloy material. According to the hard alloy material prepared through the method, the limitation that traditional cobalt serves as a bonding phase is overcome, interface bonding between the high-entropy alloy and a tungsten carbide matrix is remarkably improved, abnormal growth of crystal grains is inhibited, generation of a brittle phase is avoided, and the hardness, toughness and high-temperature stability of the hard alloy material are remarkably improved.
Owner:CHONGQING UNIV OF ARTS & SCI

Asymmetric bionic texture pyramid microcolumn array device for enhancing thin film evaporation

The invention relates to an asymmetric bionic texture pyramid micro-column array device for enhancing film evaporation, the device can stably transport a coolant and expand the effective evaporation area, and the device specifically comprises: a micro-column unit, the top of which is made of a hydrophobic material and the side wall of which is subjected to hydrophilic treatment and has a textured structure; the micro-column array is composed of micro-column units which are asymmetrically arranged, and the wetting perimeter, period and gradient of the micro-column array are subjected to accurate optimization design; in addition, according to the micro-column array, the capillary transport efficiency of the liquid is further enhanced by adjusting the distance and the height gradient between the micro-columns, and therefore the evaporation area of the thin liquid film is effectively expanded. The top of the micro-column unit is made of a hydrophobic material, the side wall is subjected to hydrophilic treatment and is combined with a micro-texture structure, the distribution and capillary action of liquid are optimized, and the stable transportation capacity of the liquid on the surface of the micro-column is remarkably improved. The device has excellent heat dissipation performance while improving the liquid transportation efficiency and the thin film evaporation performance, and is widely applied to the high-heat-flux fields such as efficient heat dissipation and microelectronic cooling.
Owner:SHANGHAI JIAOTONG UNIV

Ceramic diaphragm as well as preparation method and application thereof

The invention discloses a ceramic diaphragm as well as a preparation method and application thereof. The ceramic diaphragm comprises a base membrane, a first coating arranged on the surface of at least one side of the base membrane, and a second coating arranged on the surface of the first coating, the first coating comprises modified ceramic, a dispersing agent, a thickening agent, a binding agent and a wetting agent; the second coating comprises porous nano ceramic, a dispersing agent, a thickening agent, a binding agent and a wetting agent. The ceramic diaphragm disclosed by the invention has good high temperature resistance, and the puncture resistance of the ceramic diaphragm is improved due to the addition of the modified ceramic containing the polymer coating layer; meanwhile, by adding the porous nano ceramics with different particle sizes, the heat resistance of the diaphragm is improved under the condition that the air permeability of the diaphragm is not influenced, and the stability of the battery performance is ensured.
Owner:SHANXI HOUSHENG NEW MATERIAL TECH CO LTD

Nicosulfuron-containing herbicidal composition and application thereof

InactiveCN106172467AReasonable compositionGood weeding effectBiocideDead animal preservationChemical compositionMedicine
The invention discloses a nicosulfuron-containing herbicidal composition and application thereof. The herbicidal composition is prepared from the following components: nicosulfuron, amicarbazone, and dimethyltetrachloroisooctyl ester as well as a dispersant, an emulsifier, a wetting agent, a thickening agent, an antifreeze, and a dispersion medium, wherein the dosage form belongs to a dispersed oil suspension agent. Through the combination of the three active ingredients, the herbicidal composition has an obvious synergistic effect, the use amount of pesticides is reduced, the cost and environmental pollution are reduced, the drug resistance of corn field weeds can be delayed by the application of the composition, and the control spectrum is expanded.
Owner:SHANDONG AOKUN BIOLOGICAL TECH CO LTD

Wafer cutting protection liquid composition

The invention discloses a wafer cutting protection liquid composition, and belongs to the field of wet electronic chemicals. The composition comprises the following components in percentage by mass: 0.1-5% of a wetting agent, 0.1-2% of a penetrating agent, 0.1-2% of a dispersing agent, 0.1-2% of a pH regulator, 0.1-2% of a nonionic Gemini surfactant and the balance of water, wherein the sum of the mass percentages is 100%. The nonionic Gemini surfactant used in the invention has excellent wettability and permeability, can effectively reduce surface tension at low concentration, does not introduce foreign ions, is easy to rinse, has no residue, and can improve the cleaning ability to particles. The composition prepared from the cutting fluid has good cooling and lubricating effects, has no obvious foam, does not corrode metal to damage an electrode, can protect a wafer from being damaged during cutting, prevents fragments and pollution, is low in irritation and environment-friendly, and meets the environment-friendly requirement.
Owner:FUJIAN YOUDA ENVIRONMENTAL PROTECTION MATERIAL CO LTD

Intelligent continuous production method of common goldenrop particles

The invention relates to an intelligent continuous production method of common goldenrop particles. The method comprises the following steps: screening and crushing a filler, and conveying the filler to a material preparation bin for airflow premixing; adding the extract into an extract tank, and uniformly stirring and mixing; conveying the pre-mixed filler and extract into a mixer, uniformly mixing, inputting a wetting agent, and mixing to obtain a soft material; meanwhile, the filling agent of the next machine is subjected to airflow premixing; conveying the soft material into a granulator for granulating, and conveying granules into a hot air section of a boiling bed for drying; conveying the filling agent of the next machine into the mixing machine; after the soft materials are conveyed, the extract and the wetting agent are conveyed in sequence, and the soft materials of the next machine are prepared; after particles are transferred to the cold air section of the boiling bed, soft materials of the next machine are granulated, and materials are fed to the hot air section of the boiling bed; and screening to obtain the product. According to the continuous production method, the product quality and stability can be improved while the production efficiency is improved, and materials and energy are greatly saved.
Owner:GUANGZHOU BAIYUSN GUANGHUA PHARMA

Device and method for testing wet expansion coefficient of composite material under humidifying condition

The invention discloses a device and method for testing the wet expansion coefficient of a composite material under a humidifying condition, and belongs to the technical field of composite material performance testing, the device comprises a constant temperature box, the interior of the constant temperature box is divided into an upper closed chamber and a lower closed chamber, and the upper closed chamber is internally provided with a temperature adjusting element and a humidity adjusting element; the supporting device is arranged in the upper closed chamber, a plurality of grooves are formed in the end face of the top of the supporting device, the grooves are matched with supporting balls, and the supporting balls are used for supporting placed samples; the quality detection device is arranged in the lower closed chamber, and the detection end of the quality detection device extends into the upper closed chamber to be in contact with the bottom of the supporting device; laser emitted by the laser emitter penetrates through the upper closed chamber and is irradiated on the side end face, needing to be detected, of the sample. The problem of accurate measurement of the moisture absorption performance of the sample is solved by measuring the change of the sample through the laser transmitter and arranging the groove and the supporting ball matched with the groove on the supporting device.
Owner:SHANDONG NON METALLIC MATERIAL RESEARCH INSTITUTE

Method for measuring thickness of nanoscale anti-oxidation film

The invention discloses a nanoscale anti-oxidation film thickness measuring method, and relates to the technical field of nanoscale film thickness measurement, and the nanoscale anti-oxidation film thickness measuring method comprises the following operation steps: soaking a metal foil containing a nanoscale anti-oxidation film in a hydrochloric acid solution, recording the residual liquid as an extraction liquid, and recording the volume of the extraction liquid as V1; diluting the extract, and recording the dilution rate as a; carrying out ultrasonic treatment on the diluted extraction liquid, taking the liquid, titrating the liquid on a polished silicon wafer, and recording the volume of the taken liquid as V2; carrying out heating treatment under a protective atmosphere, measuring the wetting and spreading area, and recording the wetting area as S2; performing multi-point measurement on the film thickness of the obtained sample through an atomic force microscope, and calculating the average film thickness which is the minimum fragment film thickness h2; analyzing the proportion of black spots in the measured picture through pixel points, and recording the proportion of the black spots as b; and substituting into a formula h1 = a * S2 * V1 * b * h2 / (V2 * S1) to calculate the film thickness h1 of the nanoscale anti-oxidation film.
Owner:JIANGSU FERROTEC SEMICON TECH CO LTD

A high-stable dual-phase colloidal ceramic ink material, a preparation method and application thereof

The application discloses a kind of high-stability two-phase colloidal ceramic ink material and preparation method and application thereof, the two-phase colloidal ceramic ink material is composed of ceramic colloidal suspension, polymer colloidal suspension, additive, the ceramic colloidal suspension is composed of ceramic, solvent, dispersing agent, binder;The polymer colloidal suspension is composed of water, surfactant, rheological modifier, colloidal stabilizer.The two-phase colloidal ceramic ink material provided in the application, ceramic powder colloidal suspension and polymer colloid two phases mutually adsorb and combine, and by surfactant adjust the wetting of polymer colloid on the surface of ceramic particle and the thickness and area of adsorption layer, form the micro colloidal structure of ceramic particle wrapped by polymer colloid and have excellent stability, can be stably stored at normal temperature for 3 months and above without the change of rheological property, and can be consistently formed process condition stable printing after 3 months.
Owner:NANHUA UNIV

Hollow body, in particular for packaging a pharmaceutical composition, having a layer of glass and a surface region with a contact angle for wetting with water

A hollow body includes a wall which at least partially surrounds an interior volume of the hollow body. The wall comprises a layer of glass and has a wall surface. The wall surface comprises a surface region which is characterized by a contact angle for wetting with water of at least 80°. A process for making an item; a hollow body obtainable by this process; a closed container; a process for packaging a pharmaceutical composition; a closed hollow body obtainable by this process; a use of one of the hollow bodies; and a use of a perfluorinated silane or a perfluorosulfonic acid or both is also provided.
Owner:SCHOTT PHARMA AG & CO KGAA

Antistatic ABS material antistatic performance detection and analysis system

The invention discloses an antistatic ABS material antistatic performance detection and analysis system, and relates to the ABS material antistatic performance detection technology field, and the method comprises the following steps: generating a steady state relative humidity set point sequence at a set temperature, using 60 DEG C gloss and white light interference to quantify surface roughness, and calculating an effective contact area amplification amount; calculating the adsorption wet film coverage based on the contact angle spectrum constant; carrying out four-probe measurement under different electrode relative orientation angles in double processes of humidifying and dehumidifying, and extracting a humidifying threshold value, a dehumidifying threshold value and a lag ratio; and calculating a collaborative percolation threshold index according to the effective contact area amplification amount, the adsorption wet film coverage degree, the direction factor of threshold inversion and the critical connection degree, and giving a passing conclusion of a target humidity interval. According to the method, stable positioning and reliable release judgment of the threshold value of the antistatic ABS material can be realized.
Owner:创合新材料科技江苏有限公司

A precision grinding process for machining the motor shaft of a swimming pool water pump

This invention discloses a precision grinding process for machining the shaft of a swimming pool pump motor, relating to the field of shaft precision grinding technology. The process includes: Step 1: Establishing an incident window using a coherent jet nozzle, allowing the jet to penetrate the air gap into the grinding zone, first wetting and then introducing the load, and recording the incident window, jet posture, and dressing rhythm as working condition metadata; Step 2: After precision grinding, according to the material type, magnetic noise is used for ferromagnetic steel and X-ray diffraction is used for austenitic steel to obtain thermal damage and residual stress, and combining this with cleanliness to generate a surface integrity label and bind it to the working condition metadata; Step 3: Performing deionized ultrasonic cleaning and rinsing according to the label to remove chloride salts and free iron, rebuilding the passivation film according to specifications using chemical passivation, controlled drying, and clean sealing; Step 4: Under the premise of qualified chemical condition, performing isotropic ultra-finishing and low-plasticity rolling on the sealed working zone to form surface compressive stress and maintain geometric tolerances, quickly indicating inspection and writing back the label.
Owner:ANHUI SUNLIMA DRIVE TECH CO LTD

Hollow fiber composite membrane and preparation method thereof

The invention discloses a hollow fiber composite membrane and a preparation method thereof, and the method comprises the following steps: a pre-wetting step: wetting a hollow fiber membrane base material by using a pre-wetting liquid, so that the pre-wetting liquid occupies the pore structure of the hollow fiber membrane base material; a middle layer forming step: filling and coating the inner surface of the pre-wetted hollow fiber membrane base material with a middle layer membrane casting solution, and blowing to form a middle layer membrane casting solution membrane; curing the middle layer membrane casting liquid membrane to form a middle layer; a selection layer forming step: filling and coating the inner surface of the middle layer with a selection layer membrane casting solution, and blowing to form a selection layer membrane casting solution membrane; and curing the selection layer casting liquid membrane, and forming a selection layer on the inner surface of the hollow fiber membrane base material.
Owner:DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP +1

Preparation of modified white corundum powder and its application in ceramic shell surface material

The present invention discloses a preparation method of modified white corundum powder and its application in ceramic shell surface materials, belonging to the technical field of precision casting auxiliary materials. The present invention first performs surface modification and structural modification on white corundum powder to obtain modified white corundum powder with low reactivity, and uses it as the main raw material for ceramic shell surface materials. By adding pre-sintered composite oxides and metal oxide powders containing trace elements in the alloy components to the modified white corundum powder, the wetting angle of the alloy on the shell surface is greatly improved, and the chemical reaction rate and ion migration probability between the alloy and the shell surface are reduced, thereby achieving the purpose of reducing sand adhesion on the surface of cast alloy blades. The raw material modification method disclosed in the present invention, as well as the multi-angle and all-round shell surface material formula, can effectively reduce the probability of chemical reactions on the blade surface, improve the qualified rate of blade casting, and provide a feasible solution to the problem of surface chemical sand adhesion during blade casting.
Owner:CENT SOUTH UNIV

Method for evaluating delayed fracture characteristics of metal material, method for selecting metal material, method for manufacturing member, metal material, and automobile member

Provided is a method for evaluating the delayed fracture characteristics of a metal material, the method being capable of accurately evaluating delayed fracture characteristics caused by hydrogen entering the inside of a metal material due to atmospheric corrosion in which a chloride is a dominant factor of corrosion. This method for evaluating the delayed fracture characteristics of a metal material carries out, at least one time, a process involving: a chloride adhesion step (A) in which droplets of a chloride-containing aqueous solution are adhered to an evaluation surface of a metal material so as to achieve a predetermined adhesion amount of a chloride; and a corrosion step (B) in which a cycle having a predetermined drying step (b1), a wetting step (b2), a transition step (b3), and a transition step (b4) is regarded as one cycle, and the cycle is performed at least one time, wherein, regarding the distribution of the droplets on the evaluation surface of the metal material in at least the first chloride adhesion step (A), the average contact area of the droplets is at least 0.1 mm2 and less than 3.0 mm2, the area ratio of the total contact area of the droplets to the area of the evaluation surface is 40-80%, and the standard deviation of the contact area of the droplets is at most 3.0 mm2.
Owner:JFE STEEL CORP

Cathodic protection of concrete using an anode attached to an outer surface

An anode apparatus for mounting on an external surface of a concrete structure to provide cathodic protection of metal members in the concrete uses a pre-assembled body which is typically elongate carrying a longitudinal anode, which can be sacrificial or impressed current, together with a supporting material having a front face for attachment to the surface and an impermeable plastic covering material at the rear face covering the anode and the supporting material when the front face is attached to the surface of the concrete. A channel defined on the front face is arranged to receive a layer of a conformable ionically conductive adhesive material for attachment to the external surface. A distance of the edge of the covering material is arranged to be similar to a distance of the metal from the external surface such that wetting and drying effects of environmental moisture are the same for the anode as for the metal components. 20 25 20 17 30 11 M ar 2 02 5 A B S T R A C T 2 0 2 5 2 0 1 7 3 0 1 1 M a r 2 0 2 5 m a t e r i a l w h e n t h e f r o n t f a c e i s a t t a c h e d t o t h e s u r f a c e o f t h e c o n c r e t e . A c h a n n e l
Owner:VECTOR CORROSION TECH LTD

Anti-burst and high anti-falling water-based transfer adhesive, and preparation method and application thereof

ActiveCN117625086BCellulosePolymer science
The application discloses an anti-burst and high-anti-falling water-based transfer adhesive as well as a preparation method and application thereof. The water-based transfer adhesive comprises the following raw materials in parts by weight: 29-43 parts of a silicon-modified styrene-acrylic emulsion, 34-52 parts of a water-based butadiene-styrene emulsion, 0.3-1 part of cellulose nanofiber, 15-26 parts of deionized water, 0.1-1 part of a wetting agent, 0.1-1 part of a leveling agent and 0.05-0.9 part of a defoaming agent. The water-based transfer adhesive provided by the application has excellent anti-burst and anti-sticking properties and good adhesion.
Owner:WANHUA CHEM GRP CO LTD

Coating equipment and coating method

The invention relates to coating equipment and a coating method, and belongs to the technical field of coating. The coating equipment comprises a coating mechanism, a conveying mechanism and a wetting mechanism, the coating mechanism comprises a coating roller and a coating head, the coating roller is used for bearing and conveying a membrane material, and the coating head is matched with the coating roller to coat slurry on the surface, away from the coating roller, of the membrane material; the conveying mechanism is used for conveying a membrane material to the coating roller; the wetting mechanism is arranged on the upstream, corresponding to the coating roller, of the conveying mechanism, and is used for uniformly spraying a liquid medium to the surface, close to the coating roller, of the membrane material, so that the membrane material is attached to the coating roller. According to the coating equipment and the coating method provided by the invention, the problem of black spots or non-uniform thickness of the coated membrane material due to the existence of concave and convex points on the surface of the membrane material in related technologies is at least solved.
Owner:CHUZHOU TONGLI PHOTOELECTRIC CO LTD +1