38results about How to "Improve self-cleaning performance" patented technology

The invention discloses a semipermeable membrane which is formed from graphene provided with nanopores. The semipermeable membrane provided by the invention has extremely strong mechanical performance (strength: 130GPa), good thermal stability (can bear high temperature of 2300 DEG C) and excellent chemical and electro-chemical stability, and can be effectively used as a selective pervious membrane in permeation.

The present invention discloses one kind of high performance nanometer titania modified polyurethane material and its preparation process. By means of wet chemical technology of preparing nanometer titania powder, the precursor liquid of nanometer titania powder is added into the polyurethane material preparing process, so that the nanometer powder is attached to the surface of other micron levelpigment and stuffing powder inside the polyurethane material. The preparation process includes two steps, including preparing the precursor liquid of nanometer titania powder and modifying polyurethane material with the nanometer titania powder. The modified polyurethane material has obvious nanometer modifying effect.

The invention discloses a device for preparing semi-solid metal and alloy slurry, which mainly comprises an electromagnetic stirrer, an insulating layer, an external cooling controller, a valve, a draft tube, a preparation crucible, an insulating crucible cover, a standing crucible, a melting crucible and a thermocouple. The middle part of the preparation crucible is provided with an internal cooling controller, and the outer wall of the internal cooling controller forms a clearance with the inner wall of the preparation crucible. The device can be connected with a press-casting machine, an extruder, a continuous casting machine and a forging machine, wherein the press-casting machine consists of a press-casting fixed die, a press-casting movable die, an injection chamber and a punch head; the extruder consists of a right extrusion die profile, a left extrusion die profile, an extrusion cylinder and an extrusion rod; the continuous casting machine consists of a tundish, a crystallizer, a cooling water nozzle and a traction mechanism; and the forging machine consists of a forging die cavity and a forging die. The device has the advantages that the device has simple and compact structure, low investment cost and strong practicability; the temperature field and tissue of the prepared slurry are distributed evenly; the semi-solid alloy slurry is pure, does not bubble and has good self cleanness; and the device can produce large-specification semi-solid slurry or blank, and is quite suitable for the preparation and formation of the semi-solid slurry or the blank.

The invention provides an anti-fogging self-cleaning weakening ultraviolet glass coating and a preparation method thereof. The coating is prepared from the following raw materials in percentage by mass: 0.1-1.5 parts of an emulsifier, 0.1-1.5 parts of polyving akohol, 0.2-1.3 parts of an anionic surfactant, 0.1-1.3 parts of a photocatalyst, 0.1-1 parts of sodium metasilicate, 1-15 parts of isopropanol, 3-8 parts of glycerin, 0.05-0.3 parts of essence, 30-50 parts of ethanol, and the balance of deionized water, wherein the emulsifier is octylphenol polyoxyethylene ether and octylphenyl polyoxyethylene ether; while preparing, the raw materials are mixed, and then a mixture is uniformly stirred. Compared with the prior art, the glass coating disclosed by the invention has strong photocatalytic activity and lasting fogging resistance, is capable of weakening ultraviolet light and has excellent self-cleaning ability and sterilization ability, and is easily prepared.

The invention relates to a super-hydrophobic coating material and a preparation method thereof.The super-hydrophobic coating material is an amphipathic SiO2 microsphere / water-based polyurethane composite, the contact angle of the material and water is 153-161 degrees, and the rolling angle of water drops on the surface of the material is 4.8-7.6 degrees.The preparation method includes the steps of firstly, preparing suspension liquid of amphipathic SiO2 microspheres; secondly, mixing the suspension liquid of amphipathic SiO2 microspheres with water-based polyurethane dispersing liquid to be evenly dispersed through ultrasonic waves to obtain a coating solution, evenly coating the surface of the base material with the coating solution, and drying to obtain the super-hydrophobic coating material.The amphipathic SiO2 microspheres are self-assembled in the water-based polyurethane dispersing liquid to form the composite of a uniform surface microstructure; the coating material has quite excellent waterproofing performance and self-cleaning performance on the surface and can be widely applied to the fields of building internal and external wall decoration plates, building sunshade plates and the like.

The invention discloses a self-cleaning structure and a manufacturing method thereof. The self-cleaning structure comprises a base material, wherein a graphical structural layer is formed on the base material, and the graphical structural layer is coated with a hydrophobic coating; the graphical structural layer is a bulged matrix formed on the surface of the base material, and the height of bulge is greater than or equal to 500nm; the thickness of the hydrophobic coating is less than or equal to 100 nm; and the base material is made of glass, ceramic, metal, plastic, glaze or enamel. According to the self-cleaning structure, the graphical structural layer on the surface of the base material is integrated with the base material and cannot fall off, so that the quality and the service life of a product are effectively guaranteed; and the graphical structural layer is coated with the hydrophobic coating, so that the self-cleaning effect of the self-cleaning structure disclosed by the invention is enhanced.

The invention discloses a self-supporting and self-cleaning micron-nano straight-through hole filter membrane and a preparation method thereof.Multiple straight-through holes are formed in the filter membrane; nano particles with a supporting effect are evenly distributed in the filter membrane.Machining is conducted through the die casting process with the assistance of an electric field, and straight-through type micron-nano filter holes with precise and controllable sizes can be manufactured.By means of the filter membrane, various particles on the micron size or the nano size can be conveniently filtered out, no additional supporting membrane is needed, high self-cleaning performance is achieved, and the filter membrane can be reused after being cleaned.

The invention discloses a preparation method of self-cleaning glass. The preparation method includes the steps of preparing nanometer titanium dioxide powder doped with F and Si atoms; mixing the nanometer titanium dioxide powder with dispersant proportionally to obtain a mixture and grinding the mixture to obtain a slurry; subjecting a glass substrate to pre-treatment, to be specific, soaking and washing the glass substrate with 1% hydrofluoric acid solution for the next step; by means of silk-screen printing, coating the pre-treated glass substrate with the slurry prepared in the second step; drying and sintering to obtain the self-cleaning glass. The sintering temperature ranges from 350 DEG C to 450 DEGC. According to the preparation method of the self-cleaning glass, UV-light absorption width of titanium dioxide is increased to improve utilization rate of UV light, so that the prepared self-cleaning glass is capable of degrading organic matter and killing bacteria.