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92 results about "Ice crystals" patented technology

Ice crystals are solid ice exhibiting atomic ordering on various length scales and include hexagonal columns, hexagonal plates, dendritic crystals, and diamond dust.

Ice crystal evaporator and ice crystal water cooling device producing from same

The invention relates to an ice crystal evaporator and an ice crystal water cooling device producing from the same, belonging to the technical field of refrigeration. The ice crystal evaporator is characterized in that a liquid inlet channel is formed by an evaporator tube, a liquid inlet and a liquid outlet in a tubular casing; and the outer channel of the evaporator tube of the tubular casing is divided into more than one S-shaped channel forming a water return channel through a water inlet of a water divider and a water outlet of a water collector. The ice crystal water cooling device is characterized in that the return air inlet of the ice crystal evaporator is communicated with a compressor, a condenser, a liquid feeding valve, a dry filter, a liquid feeding electromagnetic valve anda thermostatic expansion valve in sequence, and then is communicated with the liquid inlet of the ice crystal evaporator; a cooling water inlet / outlet of the condenser is connected with a cooling tower in series; and a water inlet / outlet of the ice crystal evaporator is communicated with a water circulating pump and an ice crystal energy storage tank in series. The invention has the advantages ofhigh cooling efficiency, no icing and low cooling temperature and is suitable for production of energy storage central air-conditioning, marine fishing, seafood processing, fruit, vegetable or meat processing, and the like; the cooled medium is municipal water.
Owner:蒋军闽

A dynamic ice system that prevents ice blockage and maintains water outlet temperature

The utility model relates to energy equipment technical field discloses a kind of dynamic ice systems of ice blocking prevention and maintaining outlet temperature, including ice storage tank, ice storage tank inner wall is sequentially fixedly connected with ice slurry conveying branch pipe, stirring rod, semi-permeable membrane from top to bottom, the top of the ice slurry conveying branch pipe is fixedly connected with multiple ice slurry conveying spout, ice storage tank one side inside is fixedly connected with gas pipe, the one end of gas pipe is fixedly connected with air pump, air pump is located the outer side wall of ice storage tank, air pump outer wall is fixedly connected with air suction pipe and transmission shaft, the one side electric connection of air pump has monitoring line one, the one end electric connection of monitoring line one has monitoring device.In the utility model, ice crystal and water are completely separated by semi-permeable membrane, fine ice crystals entering the inlet of subcooling plate exchanger can be filtered out during ice storage, ice blocking in the plate exchanger is avoided, ice crystal filter is saved, the size of dynamic ice maker can be reduced, and the effects of preventing ice blocking and maintaining outlet temperature are achieved.
Owner:GUODIAN INVESTMENT (LINGSHUI) SMART ENERGY CO LTD

An anti-clogging device for the drain outlet of an air source heat pump

This utility model relates to the technical field of anti-clogging devices and discloses an anti-clogging device for the drain outlet of an air source heat pump. The device includes a drain pipe with a connecting circular frame on its exterior. The inner top and bottom walls of the connecting circular frame are equipped with limiting components that engage with the outside of the drain pipe. A filter plate is installed on the inner wall of the connecting circular frame. This anti-clogging device for the air source heat pump drain outlet, by incorporating a cleaning component and using a 1-mesh stainless steel filter plate, effectively traps tiny impurities such as dust particles and algae spores, preventing foreign objects from entering the drain pipe and causing blockage at the source. A miniature waterproof servo motor drives a second rotating shaft to rotate, which in turn drives a second bevel gear to rotate, causing a cleaning brush to rotate and scrape away dirt and ice crystals adhering to the filter plate surface in real time. This prevents the mesh from becoming clogged due to the accumulation of impurities, significantly improving the reliability of the anti-clogging device, enhancing its practicality, and making it easier for users to operate.
Owner:HONGYUAN GEOTHERMAL HEAT PUMP TECH (ZHONGSHAN) CO LTD

Quantitative method and device for silver iodide artificial precipitation snow catalytic potential based on cloud physical parameters

PendingCN122332846ASilver iodideLiquid water path
This invention discloses a quantitative method and apparatus for assessing the catalytic potential of silver iodide in artificial rain and snow enhancement based on cloud physics parameters, belonging to the field of atmospheric science and technology. The method includes: calculating and normalizing the total nucleation ratio of silver iodide particles to obtain a normalized nucleation conversion rate score; calculating the ice crystal potential ratio and supersaturation relaxation timescale that can effectively participate in the bergiron process after catalysis; calculating and normalizing the effective conversion time based on the ice crystal potential ratio and supersaturation relaxation timescale to obtain a normalized conversion rate score; calculating and normalizing the effective liquid water pathway to obtain a normalized liquid water content score; and weighted summing the normalized nucleation conversion rate score, normalized conversion rate score, and normalized liquid water content score to obtain a comprehensive catalytic potential score characterizing the quantitative results of the catalytic potential. This invention enables the quantitative assessment of the catalytic potential of cold clouds.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

A method for preparing anisotropic glass fiber aerogel

ActiveCN121021914Blow thermal conductivityExtended heat conduction pathGlass fiberPolymer science
The application discloses a preparation method of anisotropic glass fiber aerogel, which comprises the following steps: preparing a glass fiber dispersion solution; preparing an aluminum dihydrogen phosphate solution; preparing a polyvinyl alcohol solution; uniformly mixing the three solutions, pouring into a customized mold, freezing until complete solidification, and then performing freeze drying to obtain the glass fiber aerogel. Due to the influence of multiple temperature gradients on the aerogel, ice crystals grow vertically along the temperature gradient to form lamellas, and different cold surfaces interact to cause them to grow along the radial plane to the center of the square mold, finally forming an array radiation structure composed of four cones. The glass fiber aerogel prepared through the synergistic cooperation of the freeze casting technology and the aluminum dihydrogen phosphate has anisotropy and highly ordered lamellas, and therefore exhibits good low thermal conductivity.
Owner:JIUJIANG HONGLIDA COMPOSITE MATERIAL MFG CO LTD

All-layer turbulence inversion method based on spectrum fusion of lidar and millimeter wave radar

The application provides a full-layer turbulence inversion method based on spectrum fusion of a laser radar and a millimeter wave radar, wherein observation data of equipment in a same observation area are acquired; then, cloud micro-physical phase state recognition is performed, and liquid cloud areas, ice crystal / snow areas, rainfall areas and supercooled water areas are divided; the particle falling speed is set as zero in the supercooled water area as a strong physical priori; a dual-wavelength speed consistency criterion is introduced, the speed responses of the laser radar and the millimeter wave radar are compared at a same height layer, and an anchor point mode, a deviation correction mode or a model rollback mode is dynamically switched, so that the physical coupling of air vertical movement and particle sedimentation movement is realized; on this basis, the second-order structure function method is applied to invert the full-layer turbulence dissipation rate based on the decoupled air vertical speed time sequence. The application can invert the real full-height-layer turbulence dissipation rate, and is suitable for all-weather, full-height-layer and especially high-precision wind field and turbulence monitoring under complex cloud and precipitation conditions.
Owner:SHANGHAI TYPHOON INST OF CHINA METEOROLOGICAL ADMINISTRATION (SHANGHAI INST OF METEOROLOGICAL SCI) +1

Glass steel cold storage door

The utility model discloses a glass -steel cold storage door belongs to cold storage door technical field, include: cold storage door body, the cold storage door body side is connected with the sealing frame, and the one side of cold storage door body is close to the sealing frame and is equipped with the fixed through slot, and the inner chamber of fixed through slot is provided with two horizontal symmetry arrangement's visible glass, cleaning assembly sets up in the fixed through slot of cold storage door body for cleaning visible glass, and cleaning assembly contains fixed plate and two connecting plates, and the opposite side of two connecting plates all are welded with cold storage door body, and the curved surface of fixed plate is connected with two connecting plates, and the side of fixed plate is rotatably connected with rotating link through bearing, and the both end surfaces of rotating link are connected with rotating disc and the cleaning plate for cleaning visible glass respectively, and the side of cleaning plate close to rotating link is slidably contacted with visible glass, the utility model discloses can clean the ice crystal that can be condensed on the surface of visible glass, strengthens the visibility of visible glass, improves the use convenience of cold storage door.
Owner:HENAN LENGDUN DOOR IND CO LTD

Clothing (Ice Crystal Fairy Tale)

1. Name of the designed product: clothing (ice crystal fairy tale). 2. Use of the designed product: for wearing. 3. Design points of the designed product: in the combination of shape and pattern. 4. Picture or photo that best shows the design points: front view. 5. The designed product is a thin product, and other views are omitted.
Owner:孙仃鲁

Intelligent control system for freeze-drying parameters

The present application relates to the technical field of data processing, and more particularly to a freeze-drying parameter intelligent regulation system, which comprises a collection module, a determination module, a stage determination module, a type determination module, a control module, a verification module and an adjustment module. The present application constructs a quality index through multi-dimensional quantitative characterization data, and identifies whether the sublimation stage is abnormal by analyzing the time sequence coupling characteristics of ice crystal displacement rate and surface collapse degree. Further, the present application distinguishes the abnormal reasons by using the combination characteristics of rate offset and collapse change rate, so as to take targeted strategies. The regulation effect is verified by the rehydration qualification rate. Based on the historical abnormal density, the threshold is optimized, and the precise positioning and differential treatment of abnormal root causes are realized through multi-parameter coupling analysis, thereby effectively solving the problems of low abnormal recognition accuracy and low freeze-drying control precision caused by excessive dependence on static threshold and inability to adapt to complex working conditions.
Owner:厦门工学院

A drying device for a cryolite production line

ActiveCN118640671BAvoid over-drying fromAvoid burnt problemsThermodynamicsThermal treatment
The application belongs to the technical field of drying processing, in particular to a drying device for an ice crystal production line, which comprises a butt joint component, left and right sides of the butt joint component are symmetrically provided with traction components, a drying component is arranged on one side of the top of the traction component close to the butt joint component, and a pressurizing component is arranged on the other side of the top of the traction component away from the butt joint component; the pressurizing component comprises an outer rotating cylinder shell, and an oil tank is fixedly connected to the shaft center of the inner cavity of the outer rotating cylinder shell. The device can simultaneously spray fire from the inside and outside of the mesh baffle through the inner flame spray head and the ignition lance, uniformly heat the ice crystal inside and outside of the mesh baffle, and avoid the problems of uneven heating of the ice crystal and over-drying of the ice crystal, thereby avoiding the problem of burning of the ice crystal.
Owner:ZHENGZHOU LION TIGER ABRASIVE MATERIALS & ABRASIVE TOOLS CO LTD

A rapid freezing device based on konjac products

The application provides a kind of quick freezing device based on konjak product, including tunnel freezer body, also including ice bridge generation seat and electric field guide rail;The application realizes the controllable adhesion between the adjacent konjak tofu sides and corners during quick freezing by the multifunctional integrated design of ice bridge generation seat and electric field guide rail, forms the overall structure similar to "stamp unit", which is convenient for batch forming and automatic handling, and also makes consumers easily break apart;At the same time, the arc-shaped demolding rod on the electric field guide rail mechanically triggers the outward movement of the side baffle and links the piston exhaust jet, realizes the double soft demolding of mechanical drawing and airflow injection, effectively avoids product damage;At the same time, the electric field guide rail is reused as parallel electrodes to apply alternating electric field, promote the formation of small ice crystals, combined with the segmented temperature zone design of the pre-cooling zone and quick-freezing zone of the tunnel freezer body, significantly reduces the juice loss rate after thawing and maintains the Q elastic taste.
Owner:SHENGTIAN FUQING FOOD

Ice crystal field uniformity measuring device and measuring method

ActiveCN120927501BField uniformityField tests
A device and method for measuring the uniformity of an ice crystal field are disclosed, belonging to the field of ice crystal testing technology. This invention solves the problem of poor uniformity and stability of ice crystal fields in existing technologies. Key technical points include: calibrating the ice crystal field uniformity measuring device; placing the frame of the device against one side of the test area; using an external weighing sensor to measure the mass of the collection bags on both sides of the ice crystal nozzle being tested; and graphically calculating the effective coverage diameter of a single ice crystal nozzle. Based on the axial spacing of the nozzles, the width (X) of the ice crystal field test area, and the height (Y) of the test area, the nozzles are arranged to ensure proper ice crystal distribution in the test area. This invention is used to measure the effective coverage diameter and uniformity of ice crystals ejected from a single nozzle in the test area. The arrangement and spacing of the ice crystal nozzles can be adjusted according to their effective coverage diameter to improve the ice crystal field coverage area of ​​the test area.
Owner:CHINA AVIATION IND CORP HARBIN AERODYNAMICS RESEARCH INSTITUTE

Preparation method and application of elastic ceramic nanofiber flake product

PendingCN122354053AAdhesiveNanofiber
This invention discloses a method for preparing and applying elastic ceramic nanofiber flocs. Precursor coiled nanofibers are dynamically assembled using a periodically arranged spinneret module to form three-dimensional interwoven precursor nanofiber flocs. These flocs are then calcined at high temperature to obtain elastic ceramic nanofiber flocs. The flocs are cut into pre-formed sheets, conveyed by a conveying device, and wound onto the main mold of a self-rotating forming device under the action of auxiliary forming rollers. Adhesive is sprayed from the pre-formed sheets to achieve interlayer bonding, producing preforms. The main mold and preforms are placed into a matching mold to form a forming module. The preforms are then impregnated by an ultrasonic impregnation and homogenization device, followed by low-temperature treatment to form ice crystals in the impregnation solution perpendicular to the fiber direction, achieving inter-sheet stitching. Finally, the preforms are dried and demolded to obtain the finished product. This invention preserves the intrinsic elasticity and three-dimensional network structure of the fibers without damaging their structure and morphology, enabling short-process, high-efficiency, and continuous preparation of floc products.
Owner:DONGHUA UNIV

A cryogenic storage tank

This utility model provides a cryogenic storage tank, relating to the field of storage tank technology. It includes an outer ring and a temperature control component. The temperature control component includes a top plate fixedly connected to the top of the outer ring, a bottom outlet pipe fixedly connected to the bottom of the outer ring, a honeycomb anti-icing grid fixedly connected to the bottom of the top plate, and a temperature-sensitive color-changing patch fixedly connected to the outer side of the outer ring. An inner ring is fixedly connected to the inner side of the bottom of the top plate, and a partition is provided between the outer ring and the inner ring. This design effectively slows down the large-scale formation and accumulation of ice crystals, thereby preventing ice blockage and structural stress. It solves the problem of pipeline blockage caused by ice crystal accumulation in low-temperature environments, while reducing structural stress and avoiding brittle fracture of carbon steel materials due to stress, ensuring the stability of the cryogenic liquid state inside the storage tank and unobstructed pipeline flow.
Owner:SHANGHAI HUCHEN AUTOMATION SYST ENG CO LTD

A shrimp head hydrolysate with anti-freezing activity, and a preparation method and application thereof

ActiveCN120818579BImprove frost resistanceHigh antifreeze activityMicroorganism based processesPeptide preparation methodsShrimpHydrolysate
The application discloses a shrimp head hydrolysate with anti-freezing activity and a preparation method and application thereof, and belongs to the technical field of biology. The shrimp head is treated by fermentation with the aid of a magnetic field and Pediococcus pentosaceus, and a shrimp head hydrolysate with high anti-freezing effect is prepared. Six polypeptides with high anti-freezing activity are identified from the shrimp head hydrolysate through mass spectrometry analysis. The polypeptides have high ice recrystallization inhibition activity, can inhibit the formation of ice crystals and the migration of water during the food freezing process, reduce the mechanical damage of ice crystals to food, inhibit the protein denaturation caused by ice crystals, and can also reduce the thawing loss and cooking loss of food, and has great application value in food frozen storage.
Owner:GUANGDONG OCEAN UNIVERSITY

A low-temperature drying device for improving the quality of peony tea

The application belongs to the technical field of low-temperature drying, and discloses a low-temperature drying device for quality upgrading of peony flower tea, which comprises drying bins, the drying bins are provided with three, and are communicated with each other through turning joints, support plates are fixedly connected to the outer walls of the three turning joints, bidirectional motors are fixedly connected to the bottoms of the support plates, cooperation of the structures of the inner cylinder, the outer cylinder and the rotary leaf is achieved, and dynamic turning of the peony flower in the drying process is realized; when the bidirectional motors drive the inner cylinder and the outer cylinder to rotate synchronously, the spiral leaf continuously lifts and drops the petals, a uniform material curtain is formed, the defects of internal heat and external dryness and uneven drying caused by material accumulation under static tray drying are effectively solved, the air holes on the surfaces of the inner cylinder and the outer cylinder are matched, the low-temperature drying medium can uniformly penetrate the material layer, the ice crystal sublimation efficiency is significantly improved, the overall drying period is shortened compared with the static mode, and the nutritional components and the aroma substances of the peony flower are completely reserved.
Owner:INST OF AGRI PROD STORAGE & PROCESSING GANSU ACAD OF AGRI SCI

A device and method for testing ice blockage prevention performance of ice-water two-phase flow

The application discloses a kind of ice water two-phase flow anti-icing performance testing device and testing method, it is related to solid-liquid two-phase flow experimental equipment technical field.The application provides a kind of testing device, it includes ice water mixture fluid supply system and with multiple interface entrance component test section.The ice water mixture fluid supply system can prepare and long time maintain ice water mixture flow with constant ice content, ice crystal uniform suspension by built-in anti-agglomeration stirring component and external quantitative solid particle supply device.The multiple interface entrance component integrates at least two different principles or ways of heat source interface, such as first heat source interface for introducing high-temperature fluid and second heat source interface for electric heating.The application realizes stable and repeatable ice blockage experiment working condition by the above scheme, and can compare and verify the efficiency of various heat force dredging techniques on the same platform, with the beneficial effects of high working condition stability, high functional integration, high data value.
Owner:WUHAN UNIV OF TECH

A method for preparing modified cellulose fiber nonwoven material for ice crystal films

This invention relates to a method for preparing modified cellulose fiber nonwoven materials for ice crystal films. A porous membrane, consisting of a cellulose fiber spunlace nonwoven fabric with a three-dimensional texture, is tightly sandwiched between a soluble metal anode and an inert cathode to construct an electrolytic cell. The electrolytic cell is immersed in an electrophoretic modification solution containing negatively charged biocompatible macromolecules. A DC voltage is applied between the two electrodes, driving the macromolecules to actively penetrate into the spunlace nonwoven fabric via an electric field. An electrochemical oxidation reaction causes the soluble metal anode to release crosslinking ions in situ. These crosslinking ions then react with the migrated macromolecules in situ, forming a gel network within the fiber network. Finally, the product is obtained after rinsing and drying. This invention makes the preparation process more efficient, achieving deep and uniform penetration and efficient in-situ fixation of the modifier in the fiber substrate. It also protects and even strengthens the original physical texture during the modification process, resulting in high-performance gel mask materials.
Owner:SHANGHAI LANZHI MEIYA COSMETIC CO LTD +1

A method for preparing and applying flexible graphene aerogel

ActiveCN121085257BAvoid residueAvoid biocompatibility effectsGraphiteGrapheneCelluloseCross linker
This invention relates to the field of flexible graphene aerogel technology, specifically to a method for preparing and applying flexible graphene aerogel, comprising: dispersing graphene nanosheets in deionized water to form a dispersion with a concentration of 5-10 mg / mL, and adding 0.1-0.5 wt% carboxymethyl cellulose as a stabilizer; placing the dispersion in an alternating magnetic field for pre-freezing to form an ice crystal-graphene composite; introducing 1-5 wt% chitosan crosslinking agent into the pre-frozen ice crystal-graphene composite, which binds to the oxygen-containing functional groups on the graphene surface through hydrogen bonds to obtain the composite; and drying the composite to obtain a flexible graphene aerogel. This invention can avoid the residue of toxic substances during the preparation of flexible graphene aerogel, prevent the impact of residual toxic substances on biocompatibility, and avoid performance degradation of flexible graphene aerogel after long-term use.
Owner:GUANGDONG XINCHANGSHUN NEW MATERIAL TECH CO LTD

Pulsed laser based hierarchical porous structure aerogel and preparation method and application thereof

ActiveCN116272701Bhigh strengthGuaranteed macro formabilityFreeze-dryingCross linker
The application discloses a kind of multi-level pore structure aerogel based on pulsed laser and preparation method and application, belong to solar energy conversion and utilization technical field.It is inorganic material containing silicon nano as freezing base element, biomass polymer is crosslinking agent, deionized water is solvent, three are uniformly mixed and stand to form hydrogel after solidification, then freeze to form ice crystal, then remove ice crystal to form micron-nanometer level porous aerogel using freeze drying technology;Finally, the micron-nanometer level aerogel obtained is customized punched using pulsed laser technology Millimeter hole, finally obtain millimeter-micron-nanometer multi-level pore aerogel.The application first uses the high single-pulse energy of laser, and the customization optimization regulation and control of millimeter level hole of aerogel is not limited by the size and shape of template, and only through simple programming can realize the diversified design of millimeter hole, which is simple, stable in process and good in reproducibility.
Owner:OCEAN UNIV OF CHINA

Wind tunnel test apparatus and method for ice crystal testing and temperature sensor testing

The present application relates to the technical field of wind tunnel test, and discloses a wind tunnel test device and method for ice crystal test and temperature sensor test, which comprises a backflow type wind tunnel, the backflow type wind tunnel comprises a first test section, a second test section, a power section, a rectification section and a temperature control section, a temperature sensor dynamic characteristic test equipment is arranged in the first test section, the first end of the second test section is communicated with the tail end of the first test section, an ice crystal test equipment is arranged in the second test section, the air inlet of the power section is communicated with the tail end of the second test section, and the air inlet is used for increasing the airflow velocity in the wind tunnel, the rectification section inlet is communicated with the air outlet of an axial flow fan, and the rectification section inlet is used for eliminating the distortion and turbulence in the airflow, the rectification section outlet is communicated with the first end of the first test section, a component for generating ice crystals in the ice crystal test equipment is connected with one side of the rectification section, and the temperature control section is arranged in series on the pipeline between the second test section and the power section, and is used for controlling the temperature of the airflow in the backflow type wind tunnel.
Owner:HANGZHOU INTERNATIONAL INNOVATION INSTITUTE OF BEIHANG UNIVERSITY

A radiation source pulse sorting method, program, device, and storage medium

This invention belongs to the field of radiation source pulse sorting technology, specifically relating to a radiation source pulse sorting method, program, device, and storage medium. This invention models the determination process of the neighborhood radius and minimum number of neighborhood points for DBSCAN clustering in the pre-sorting of radiation source pulses as a multi-objective optimization problem, designs a multi-objective hoarfrost ice crystal optimization algorithm, and introduces multiple clustering performance indicators as optimization objectives under a unified evaluation framework to jointly constrain multiple structural performance aspects of the pre-sorting results. Simultaneously, an ice crystal subpopulation structure is introduced into the hoarfrost algorithm, integrating water molecule adsorption and soft frost search mechanisms, enabling the parameter search process to maintain both global search capability and good local search capability, ensuring the basic consistency of the pulse sequence structure in the pre-sorting results. This provides reliable input for the subsequent main sorting of each radiation source pulse sequence, reducing the problem of mis-batch sorting in radiation source pulses.
Owner:HARBIN ENG UNIV

Ceiling light fitting (ice crystal)

ActiveCN310020018SPendant lightEngineering
1. Name of the designed product: lamp fitting (ice crystal). 2. Use of the designed product: for lamp fitting. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.
Owner:ZHONGSHAN JIJING TECHNOLOGY CO LTD

A heating device that combines solar energy to block the propagation of reverse flow of ice crystals

The utility model relates to the field of energy equipment discloses a kind of heating device of ice crystal blocking countercurrent propagation combined with solar energy, including ice crystal blocking countercurrent propagation heating device, solar photovoltaic system is arranged on the ice crystal blocking countercurrent propagation heating device, solar photovoltaic system is internally provided with solar photovoltaic panel, battery, inverter and control device, the ice crystal blocking countercurrent propagation heating device is internally provided with supercooled water pipe one, power coil, supercooled water pipe insulation layer and supercooled water pipe protective layer, flow velocity sensor is equipped at the entrance of the ice crystal blocking countercurrent propagation heating device.In the utility model, application range is wide, easy to operate, environmental protection energy saving, the supercooled water state after supercooled water plate replacement is unstable, phase change freezing tendency at any time is solved.Ice crystal is the freezing nucleating agent of supercooled water, can accelerate supercooled water freezing, and finally lead to supercooled water heat exchanger internal freezing, affect the problem of heat exchange.
Owner:GUODIAN INVESTMENT (LINGSHUI) SMART ENERGY CO LTD

Highly efficient waterproof and breathable membrane and preparation method thereof

PendingCN122321650ALiquid waterFreeze-drying
This invention discloses a high-efficiency waterproof and breathable membrane and its preparation method. The preparation method includes the following steps: preparing a casting solution containing an aqueous polymer and deionized water; directionally freezing the casting solution to allow the deionized water to grow into ice crystals along a single temperature gradient direction; then freeze-drying the ice crystals to sublimate them, obtaining a core membrane with a vertically arranged and interconnected channel structure; and forming hydrophobic surface layers on both surfaces of the core membrane to obtain the high-efficiency waterproof and breathable membrane. This invention, by constructing a synergistic structure of a core layer with vertically ordered interconnected channels and an ultra-thin, ultra-hydrophobic surface layer, achieves high mechanical strength while ensuring efficient water vapor permeability and durable liquid water barrier, significantly improving breathability, waterproofness, and durability.
Owner:JIANGSU KANGHUI NEW MATERIALS TECH CO LTD