126 results about "Ice adhesion" patented technology

The present invention relates to a novel anti-icing composite for preventing ice adhesion. A microphase separated, fluorinated nano/micro particles in aliphatic/fluorinated polyurethane/polyurea matrix coated on an elastic substratum results in anti-icing composite. The preparation method for novel anti-icing composite is disclosed.

The present invention relates to a self-renewing, anti-icing composition driven by a dehydrogenative reaction of a reactive hydrogen-rich compound catalyzed by nanoparticle immobilized catalysts, which is active under subzero temperatures. The disclosed coating displays a variety of properties including, but not limited to hydrophobicity, anti-wetting, and resistance to ice formation and ice adhesion. The novel anti-icing coating can be used on glass surfaces requiring optical clarity and transparency and can also be applied to a variety of smooth, roughened, or porous surfaces.

The present invention relates to a novel composite for preventing ice adhesion. A superhydrophobic or superhydrophilic surface with a hydrophobic, low freezing point liquid adsorbed onto surface asperities results in a durable, renewable anti-icing surface. The preparation method for novel icing and rain protecting surface is disclosed.

A measuring assembly measures the adhesion between a fixed part and a movable part wherein the fixed part and movable part have ice extending therebetween. The measuring assembly includes a chamber for maintaining the ice, the fixed part and the movable part and the movable part at a predetermined temperature. A tension generator applies a force to the movable part to separate the movable part from the fixed part. A tension gauge measures the force required to overcome the adhesion between the movable part and the ice to remove the movable part from the fixed part. The test pieces (fixed and movable parts) are easily reproduced and coated with various coatings allowing direct comparison and evaluation of coatings in regards to ice adhesion.

The invention provides a mono-component hybridized aqueous anti-icing coating material. The mono-component hybridized aqueous anti-icing coating material mainly contains a hybridization emulsion, wherein the hybridization emulsion is a nanoparticle modified polymer emulsion preferably. The invention further provides a coating layer containing the coating material, a preparation method of the coating material, a coating method of the coating layer and a method for forming an anti-icing coating layer on the surface of a base material. As water serves as a dispersion medium, the mono-component hybridized aqueous anti-icing coating material provided by the invention is environment-friendly; after cured to form a film, the coating layer can have excellent wear resistance and prolonged service life; through coating the surfaces of base materials, such as metal, glass and macromolecular engineering materials, with the anti-icing coating layer, the ice adhesion strength of the surfaces of the base materials can be lowered, so that compared with the other similar materials, the material has the following advantages of simple process, wide applicable range, easiness in large-area construction, excellent anti-icing performance, excellent mechanical properties and easiness in coating layer repair.

The invention relates to a method and an apparatus for testing the ice adhesion strength. The apparatus comprises parts of a sample mount, refrigeration units, a water titration unit, a sliding knife, a force sensor and the like. The method for testing the ice adhesion strength comprises the following steps: fixing a test piece to be tested on the sample mount, and refrigerating the test piece to be tested by the bottom refrigeration unit; titrating quantitative water to the surface of the test piece to be tested by a water titration device to allow water to rapidly freeze on the surface of the test piece to be tested when the temperature of the test piece to be tested achieves a preset refrigeration temperature; and parallelly trimming convex ice hulls on the surface of the test piece by the sliding knife with the force sensor, testing maximal force when ice is peeled (or ruptured), and treating the maximal force as the ice adhesion strength for characterizing the surface of a material or a coating. According to the method and the apparatus provided by the invention, the principle and the structure are simple, the operation is simple and convenient, and the tangential adhesion strength between the surface of the material (or the coating) and ice can be actually characterized; and the repetition reliability and the accuracy of tests can be guaranteed because main parameters of the freezing rule, the pattern, the experimental temperature and the like are accurately controlled.

The invention provides an anti-icing paint which consists of inorganic nanoparticles and water-based resin, wherein the inorganic nanoparticles are uniformly dispersed in the water-based resin and then coated on a substrate to form a film, and after the film is solidified, the anti-icing paint is obtained. Due to use of the water-based resin, the anti-icing paint is environment-friendly; and due to the existence of ions obtained by ionization of hydrophilic groups, such as carboxyl, and restricted water on the macromolecule surface, a non-icing water film is formed on the surface of the anti-icing paint, so that a lubricating layer is introduced between ice and the anti-icing coating, and therefore the adhesion strength between the surface of the substrate and the ice is greatly reduced. Meanwhile, the mechanical strength of the coating can be enhanced due to addition of the rigid inorganic nanoparticles, the coating is endowed with excellent wear resistance and the service life of the coating is prolonged.

The invention provides preparation methods of a two-component waterborne wear-resisting and low-ice-adhesion anti-icing coating and a coating layer thereof. The two-component waterborne anti-icing coating is composed of a component A containing a core-shell structure polymer emulsion and inorganic nanoparticles and a component B containing a curing agent. An outer layer of the core-shell structure polymer emulsion in the component A of the anti-icing coating is a hydrophilic shell layer, so that polymer emulsion particles can be stably dispersed in water, and the advantages of being green and environmentally friendly are provided. The inorganic nano particles in the component A are rigid particles, can improve the mechanical properties of the anti-icing coating layer, endow the coating layer with excellent wear resistance and prolong the service life of the coating layer. After the coating is cured into a film, the hydrophilic shell layer of the polymer emulsion particles can absorb moisture, and thus a water lubricating layer is formed on the surface of the coating layer; when the coating layer surface is iced, due to the existence of the water lubricating layer, the acting force between ice and the coating layer is decreased, besides, the substrate surface roughness is also reduced, and the contact area between the ice and the substrate is decreased.

The invention belongs to the technical field of material surface engineering, and in particular relates to an organic silicon gel anti-ice-covering coating, and a preparation method and application of the organic silicon gel anti-ice-covering coating. The low-ice-adhesion organic silicon gel anti-ice-covering coating consists of crosslinkable polysiloxane, a crosslinking agent, a catalyst, a promoter, non-volatile hydrophobic liquid and an inorganic material. The preparation method comprises the following steps: performing mixing and uniform ball-milling on polysiloxane, the crosslinking agent, the catalyst, the promoter, the non-volatile hydrophobic liquid and the inorganic material, then coating on a base material, and curing to obtain an anti-ice-covering coating, wherein crosslinkable polysiloxane, the crosslinking agent, the catalyst and the promoter form an organic silicon rubber network by virtue of reaction, and the non-volatile hydrophobic liquid is effectively fixed in the anti-ice-covering coating; gel formed by the non-volatile hydrophobic liquid and the crosslinkable organic silicon rubber network is a main anti-icing functional layer which can delay the surface icing of water and reduce the binding force between an ice layer and a substrate material so as to ensure that the coating surface achieves an anti-ice-covering effect, and the mechanical performance of the anti-ice-covering coating also can be effectively improved.

The invention belongs to the technical field of material surface ice removal, and discloses a super-hydrophobic icing prevention coating with an active photothermal deicing function, a coating layer,a preparation method of the coating and an application of the coating. The coating mainly comprises silicon carbide micro-powder, carbon nano tubes, adhesives, hydrophobic agents and solvents, the weight ratio of the silicon carbide micro-powder to the carbon nano tubes is (0.5-20):1, the weight ratio of the adhesives to the carbon nano tubes is (40-100):1, the weight ratio of the hydrophobic agents to the carbon nano tubes is (4-10):1, the adhesives are provided with silane coupling agents, and the hydrophobic agents are provided with long-fluorine carbon chain silane coupling agents. The coating layer is prepared from the coating. The coating is applied to material surface icing prevention. The coated layer prepared from the icing prevention coating prolongs icing time of super-cooled liquid droplets, ice adhesion of the surface is reduced, rapid heating is achieved under irradiation of near-infrared light, rapid photothermal deicing is achieved, active photothermal deicing and passive icing prevention of the coating layer are combined, and rapid remote deicing is facilitated.

The invention belongs to the technical fields of chemistry and chemical engineering, and relates to an icing-proof coating with low ice adhesion, and a preparation method and application thereof. The icing-proof coating provided by the invention is composed of an inorganic material and a cross-linked hydrophilic polyelectrolyte. The inorganic materials and the cross-linked hydrophilic polyelectrolyte are mixed and subjected to ball milling, and then coated on a substrate film, and cured to form the icing-proof coating. The inorganic material improves surface mechanical properties and wear resistance of the icing-proof coating, while the hydrophilic cross-linked polyelectrolyte ionizes a large amount of ions after water absorption; the ion solution with high concentration lowers the freezing point of water and enables an unfreezing water film to be formed on the surface of the icing-proof coating; therefore, a lubricating layer is introduced between ice and the surface of the icing-proof coating, so that the ice later on the substrate surface layer breaks away from the substrate surface under the action of gravity or wind to realize the icing-proof effect.

The invention discloses a deicing robot based on an automatic tensioning U-shaped heating mechanism, relates to the technical field of protection equipment for overhead power transmission cables, and solves the problem of deicing the existing deicing mechanism with strong binding force and thick ice layer. The problem of limited ice capacity, including the casing, on which the driving wheel and the driven wheel are installed, the driving motor and the worm gear mechanism are arranged inside the casing, the worm gear is arranged above the worm and meshed with the worm, and the worm wheel and the driving wheel pass through the transmission belt A Transmission connection, the front end of the worm sticks out of the casing and is connected with a rotating body that rotates with the rotation of the worm. The rotating body is equipped with a mechanical deicing mechanism, including a thermal deicing mechanism. The thermal deicing mechanism includes a stepping motor, a transmission belt B, The U-shaped heating plate and the shells symmetrically arranged on both sides of the transmission line can effectively remove the icing with strong binding force and thick ice layer, such as rain rime and mixed rime, and avoid thermal De-icing mechanisms are prone to damage to the interior of power lines due to sustained heat.

The invention relates to the field of icing adhesion strength testing,and discloses an icing adhesion strength testing device. The icing adhesion strength testing device comprises a cooling table,a cooling circulator,a sleeve,a part to be tested and a force testing element. The cooling circulator is connected with the cooling table through a refrigerant circulating pipeline,the part to be tested is fixed to the cooling table,and the upper end and the lower end of the sleeve are open. A pull groove is formed in the circumferential direction of at least one end of the sleeve,the end,provided with the pull groove,of the sleeve is arranged on the part to be tested,and liquid is injected into the sleeve and cooled into an icicle through the cooling table; one end of an element with force to betested is connected with a connecting rope sleeve,the connecting rope sleeve is sleeved with the pull groove of the sleeve,the element with the force to be tested exerts pull force to the sleeve through the connecting rope sleeve until the icicle is separated from the surface of the part to be tested,and the icing adhesion strength between the icicle and the part to be tested is calculated. The icing adhesion strength testing device is easy,convenient and fast to operate,and good in result repeatability.

A vehicle heat management device that includes: a pump that circulates cooling water around a cooling water circulation path; an air blower that blows air through a radiator toward an exterior heat exchanger of an air-conditioning device of a vehicle; and a de-icing controller that, in a case in which an estimated ice adhesion amount on the exterior heat exchanger is a predetermined value or greater, starts first de-icing control by using a pump to circulate cooling water in a flow path including a second flow path, in the state in which a first flow path and the second flow path are isolated from each other by a first switching section, and using the air blower to blow air through the radiator toward the exterior heat exchanger.

The invention provides an experimental device for testing the icing adhesion of wings. Components comprises: a box of an experimental section, a sliding rod, a force sensor, a bracket, a lead screw, ahand wheel, an angle-of-attack adjusting plate, a wing section, a wing fixing plate, and a wing fixing shaft. The wing section is installed in the box of the experimental section, and the box of theexperimental section is driven along the sliding rod by the hand wheel and the lead screw. The angle-of-attack adjusting plate can adjust the angle-of-attack of the wing, and the icing condition can be adjusted by connecting the fixed ice wind tunnel to the experiment box bracket. After icing of the wing section in the ice wind tunnel, the device manually loads and moves the experimental section box, and measures the change value of the experimental box to the bracket pressure through a pre-calibrated force sensor to obtain the icing adhesion on the wing surface. The experimental device for testing the icing adhesion of the wing has the characteristics of simple and flexible installation, can be used for the icing adhesion test of aircrafts and helicopter wings, and can meet the needs of measuring the icing adhesion of different structural wings under different icing conditions.

The invention discloses a lubricating organic-silicon anti-icing coating and a preparation method thereof. The organic-silicon anti-icing coating is prepared by the following steps: taking hydrogen-containing polydimethylsiloxane as a main chain, single-terminal vinyl polydimethylsiloxane as a branched chain, double-terminal vinyl polydimethyl iloxane as a cross-linking agent, and polydimethylsiloxane which does not participated in a crosslinking reaction as an additive, and carrying out a ''one-step method'' to prepare the lubricating organic-silicon anti-icing coating. The branched chain formed by the single-terminal vinyl polydimethylsiloxane provides a storage space for the oil-lubricating polydimethylsiloxane which does not participated in the reaction; and under a low temperature, the unreacted polydimethylsiloxane migrates to the surface to reduce the ice adhesion strength of the coating. The ice shearing strength of the lubricating organic-silicon anti-icing coating prepared bythe ''one-step method'' can be low to 4.5 kPa. The coating provided by the invention has the advantages of easily available materials, simple and convenient preparation method and controllable condition, and has a great application prospect in solving the problem of preventing ice coverage on the surfaces of infrastructures.

The invention discloses a material surface dynamic ice formation adhesion determination method and a device thereof, and aims to solve the problems that during ice formation adhesion strength determination, great difference exists between static ice formation method and the frozen structure and strength of an actual operating environment, while in dynamic ice formation method measurement, the acting surface of force is much smaller than an ice adhesion area, as ice is fragile in itself, is easily broken without pushing, and can be unmeasurable. The device includes a motor, a cantilever, a rotation speed determination apparatus, a rotation speed display and a high-speed camera, and connecting pieces are disposed at two ends of the cantilever respectively. The method and device provided by the invention ensure the integrity of dynamic icing during test, not only satisfies the simulation degree requirement for real icing, but also meets the requirements for strength protection of icing test pieces. At the same time, the measurement device provided by the invention has the characteristics of ingenious design, reasonable design, simple structure and easy maintenance. Practical tests show that the method and device provided by the invention can meet the dynamic ice formation adhesion determination requirement, the determination result is accurate, and the repeatability is good.

The invention provides an ice adhesion shearing strength measuring device which comprises a base, a bearing and a central shaft which are connected in sequence by an arm of force, wherein the base is rectangular; two guide rails are arranged at two sides of the central axis in the length direction of the rectangular base; the cross sections of the guide rails are trapezoid; a trapezoid sliding block is adhered to each guide rail; rectangular grooves are formed below the sliding blocks; the sliding blocks can slide on the corresponding guide rails along the length direction of the base; the bearing is arranged in the middle of the base; the inner wall of the bearing is connected with the central shaft; the central shaft can rotate freely and is connected with the arm of force; a structure capable of being matched with a torque spanner is arranged at the top end of the central shaft; arc-shaped shapes are arranged on two ends of the sliding blocks and the arm of force, so that adhesion shearing force between ice and a material coating can be measured relatively accurately; water absorption sponge is adhered to an arc-shaped support of the arm of force, so that the integration of an ice layer can be ensured. By using the device, the adhesion strength between the ice and the surface of a material can be conveniently measured; compared with the prior art, the device is used for solving the influence of non-integration of the interior of the ice layer to the measurement result, and is simple in structure and easy to operate.

Durable icephobic materials form anti-ice coatings on a variety of substrates, including for aircraft, powerlines, vehicles, marine structures, communications towers, outdoor equipment, and the like.The icephobic material may comprise an elastomeric polymer with a low crosslink density (e.g., <= 1,300 mol/m3) and low initial ice adhesion strength (e.g., [tau]ice <= 100 kPa prior to exposure to icing conditions). Further, the icephobic material maintains [tau]ice after 10 icing/deicing cycles that is >= 50% of the initial [tau]ice Introducing optional miscible liquids enhances interfacial slippage of chains in the elastomeric polymer. The low [tau]ice levels minimize ice buildup and eliminate necessary work to remove any accumulated ice via passive removal during normal operation. Other icephobic materials include linear polymers with plasticizers distributed therein or PDMS-silane coatings, both of which are free of any layers of surface liquids. Methods of making such icephobic materials are also provided.

The invention relates to a deicing and anti-icing fluid, particularly a non-Newtonian fuselage deicing and anti-icing fluid and a preparation method thereof. The non-Newtonian fuselage deicing and anti-icing fluid can reduce adhesion of ice on the object surface to eliminate and prevent icing on the aircraft fuselage surface, and has superlong anti-icing retention time. The non-Newtonian fuselage deicing and anti-icing fluid comprises the following components in parts by mass: 40-60 parts of freezing-point depressant, 0.05-1.2 parts of rheologic modifier, 0.01-0.3 part of anti-icing compounding agent, 0.01-3 parts of pH regulator, 0.01-3 parts of corrosion inhibitor, 0.01-0.5 part of staining agent and 40-60 parts of deionized water. The invention is based on the low-temperature rheologic research, especially aims at the low-temperature operating environment and characteristics of the deicing and anti-icing fluid, and determines the distribution and arrangement of the main chain and branch chain of the rheologic modifier as well as the preparation and acquisition method of the low-temperature conformation. By combining the anti-icing compounding agent, corrosion inhibitor and other assistants in the formula, the prepared deicing and anti-icing fluid has the characteristics of excellent shearing restorability, excellent ice adhesion inhibition capacity at 0 to -20 DEG C, and long anti-icing time.

Ice test devices are disclosed. One such ice test device is an ice adhesion test device. The ice adhesion test device comprises an ice adhesion test target in the form of a well in which, in use, a layer of accreted ice is built up. The target comprises a sample plate at the bottom of the well and an ice-engagement element positioned circumferentially around the sample plate and providing a side wall of the well, and wherein the sample plate is rotatable relative to the ice-engagement element. The ice adhesion test device also comprises torque means for applying a rotational torque between thesample plate and the ice-engagement element. The ice adhesion test device also comprises transducer means for, at least at a point at which the layer of accreted ice separates from the sample plate,measuring the rotational torque and/or the stress on the ice.