30results about How to "Low ice adhesion" patented technology

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 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.

Articles including durable and icephobic polymeric coatings are disclosed. The polymeric coatings include a bonding layer which may contain a substantially fully cured polymeric resin providing excellent adhesion to metallic or polymer substrates. The polymeric coating further includes an outer surface layer which is smooth, hydrophobic and icephobic and, in addition to a substantially fully cured resin, contains silicone comprising additives near the exposed outer surface. The anisotropic polymeric coatings are particularly suited for strong and lightweight parts required in aerospace, automotive and sporting goods applications. A process for making the articles is disclosed as well.

The invention discloses an integrated forming method of a polymer material with a covering ice preventing function. By designing the mold surface structure and adjusting the forming hot-pressing parameters of a composite material, integrated forming of a covering ice preventing function structure and a polymer-based material is achieved. The polymer material with the covering ice preventing function and the integrated forming method thereof have the following advantages that the two functions of preparation of the polymer-based material and integration of the covering ice preventing micro-structure on the material are finished at the same time; compared with the traditional technology, operation is simple, the structure forming property is good, and the micro-structure distribution is uniform; the prepared polymer material has the surface with the super-hydrophobicity to the liquid-state water, the freezing time of supercooling liquid drops is prolonged remarkably, and thus the supercooling liquid drops have enough time to leave the surface; and the ice adhesion strength is extremely low, the covering ice can be separated from the material surface under the action of natural wind force or gravity, and the polymer material can be used for covering parts, which are exposed in the extreme environment, on the outer surface of machine equipment and has the important practical significance to the ice preventing and removing technological development of a wind power machine and an airplane.

The invention provides an anti-icing and de-icing composite material with an electric heating/super-hydrophobic function and a preparation method of the anti-icing and de-icing composite material. The composite material comprises a super-hydrophobic layer (1), an electric heating grid layer (2) and a base layer (3) from top to bottom in sequence; the electric heating grid layer (2) is a mesh metal template with a micropore array; the electric heating grid layer (2) is coated in the base layer (3); and the base layer (3) is formed by a polymer mixture. The invention also relates to a preparation method of the composite material. Compared with traditional single active deicing or passive anti-icing, passive anti-icing and active anti-icing are combined, ice attached to the surface of the composite material can be rapidly removed, and the problem of high energy consumption caused by single electric heating deicing is solved. The anti-icing and de-icing composite material prepared by the method is higher in anti-icing and de-icing efficiency, can be used for covering parts on the outer surfaces of various machinery equipment in various service environments, and is of great significance to the development of an efficient anti-icing and de-icing technology.

The invention relates to a forming method of an anti-icing array structure on the surface of a thermosetting resin-based composite material. An anti-icing array on the surface of the thermosetting resin-based composite material is prepared by designing an anodic aluminum oxide template structure and adjusting forming parameters of the composite material. The forming method has the beneficial effects that the forming method of the anti-icing array structure on the surface of the thermosetting resin-based composite material is simple in manufacturing process, the manufactured composite materialis complete in surface micro-nano structure, stable in size and high in structural consistency, the super-hydrophobic characteristic is achieved on liquid water, the super-cooled liquid drop icing time can be remarkably prolonged, and supercooled liquid drops have enough time to be separated from the surface; the extremely low ice adhesion strength is achieved, and an ice coating can fall off fromthe surface under the action of natural wind or gravity; and the anti-icing array structure can be used for machine outer surfaces such as aircrafts and wind driven generator blades which are exposedin an extreme environment, and important significance on development of ice prevention and removal technologies of equipment such as wind driven generators, novel high-speed railway motor train unitsand airplanes, in particular to passive ice prevention and removal technologies is achieved.

A super-hydrophobic anti-icing aviation aluminum alloy surface with ultralow ice adhesion is composed of a multi-stage micro-nano structure, the micro-nano structure is based on a three-dimensional micron cone structure periodically distributed on the surface of an aluminum alloy base material, and densely-growing nanosheets and nano flower clusters composed of the nanosheets are distributed on the surface of a micron cone; and one or two of submicron spheres and submicron flowers are dispersed and distributed on the surface of the micron cone or between the micron cones. The invention furtherdiscloses a production method of the surface, the surface is formed by combining ultrafast laser ablation and a wet chemical method and then carrying out low-free-energy surface chemical modification, and large-area efficient production can be achieved. The aviation aluminum alloy anti-icing surface has extremely low ice adhesion, adhesion strength between ice and the surface can be as low as 6 kPa, and the ice can automatically fall off under the action of self gravity or slight vibration. The surface structure can be widely applied to anti-icing fields of aviation key components, ships, ground transportation tools, refrigerators, air conditioners and the like.

The invention relates to benzoxazine type super-hydrophobic nano silicon dioxide as well as a preparation method and application thereof, belonging to the technical field of nano material modification and application. The benzoxazine type super-hydrophobic nano silicon dioxide is prepared by the following step: stirring benzoxazine and a solvent thereof, silicon dioxide nanoparticles and water for 0.5-2 hours at 20-50 DEG C in microwave condition. The water contact angle of a coating prepared from the benzoxazine type super-hydrophobic nano silicon dioxide is larger than 150 degrees, and the roll angle is smaller than 10 degrees while the coating has good anti-icing performance; compared with a metal aluminum surface, the ice adhesion strength on the surface of the anti-icing coating is reduced to 50% or below; at low temperature, the ice cover is reduced to 50% or below; and the water icing delay time on the surface of the anti-icing coating is longer than 30s.

The invention provides an ice-covering-resistant film and a preparation method thereof. The preparation method comprises: uniformly mixing vinyl-terminated silicone oil, hydrogen-terminated silicone oil, a Karstedt catalyst and a liquid-state long-chain alkane, and curing to obtain a film; soaking the film in an organic solvent to obtain a film with a porous structure; and soaking the film with the porous structure in a filling liquid to obtain the ice-covering-resistant film. According to the present invention, the shear strength, the ice adhesion strength and the service life of the ice-covering-resistant film are improved by controlling the types and the ratio of the raw materials; the prepared ice-covering-resistant film has advantages of suitable shear strength, low ice adhesion strength and long service life, belongs to the active anti-icing system, can be directly attached to the surfaces of instruments and other objects requiring ice-covering resistance, has significant ice-covering resistance, and further has characteristics of simple use, simple operation and convenient maintenance at the late stage.

The invention relates to fluorinated silicon dioxide nanoparticles and application thereof. According to the technical scheme, vinyltriethoxysilane, tetraethoxysilane, alkali and a solvent are mixed, deionized water is dropwise added, the mixture is stirred at the room temperature to react for 1-24 h, and vinyl silicon dioxide is obtained; fluorine-containing acrylate, vinyl silicon dioxide, an initiator and a solvent are mixed, heating is conducted to 70-85 DEG C, and stirring is conducted to react for 2-24 hours to obtain the fluorinated silicon dioxide nanoparticles. The water contact angle of the coating prepared through copolymerization of fluorinated acrylate and vinyl silicon dioxide is larger than 150 degrees, the rolling angle is smaller than 8 degrees, and the coating has good anti-icing performance. The invention belongs to the technical field of nano material modification and application.

The invention provides preparation and application of an olefin copolymer. The olefin copolymer is prepared by olefin metathesis polymerization, and then a copolymer film is obtained by pouring. The prepared copolymer has good anti-icing performance.

The invention discloses a preparation method of a self-heat-absorption reshaping ice extension/deicing microarray structure, and belongs to the technical field of micro-nano structure functional surface preparation. The blade-like array microstructure with the inclination angle of 30-45 degrees is prepared on the shape memory alloy, and the graphene photo-thermal coating grows on the surface of the blade-like array microstructure. After the graphene photo-thermal coating is irradiated by sunlight, a large amount of heat is generated on the surface through photo-thermal conversion, the local temperature is rapidly increased, in a low-temperature environment, the shape memory alloy coated with ice on the surface recovers to be in a high-temperature state with a large micro-structure inclination angle after being heated, an ice layer attached to the surface is promoted to fall off, and therefore the graphene photo-thermal coating is formed. And the active anti-icing and deicing process of the material surface is realized. The microstructure machined by adopting wire cut electrical discharge machining is good in shape recovery after deformation. The directional rolling of the liquid drops can be realized by regulating and controlling the form of the array microstructure, so that subsequent deicing is facilitated; the prepared microstructure can reduce the contact area between ice and the substrate so as to reduce the adhesion strength of the ice on the material surface.

The invention relates to a super-hydrophobic surface with high durability and low ice adhesion and a preparation method thereof. The surface structure comprises a substrate, micron hillocks, nanowires and polymer connectors, the plurality of micron hills are periodically distributed on the surface of the substrate; a plurality of nanowires are arranged, the nanowires extend out of the surfaces of the micron hillocks, and a plurality of nanowires extend out of the surface of each micron hillock; and the polymer connectors are connected between the adjacent nanowires. In the surface structure, the gaps between the nanowires on the surface of the micron hills are smaller than those between the micron hills, and the polymer connectors are connected between the adjacent nanowires and show a net-shaped structure, so that lower ice adhesion strength can be obtained while the surface hydrophobicity is kept. Meanwhile, in the use process, after a melting and freezing cycle, the nanowires at the top end of the surface structure may be gradually broken and damaged, but the polymer connector can be stored, so that the durability of the surface structure can be effectively improved.