12results about How to "Improve antifouling performance" patented technology

The application discloses a kind of multistage synergic covalent grafting type hydrolysis-resistant self-cleaning PET submarine cable monofilament and preparation method, the monofilament includes three parts of core layer, skin layer and surface layer, the core layer is the high viscosity polyethylene terephthalate resin containing carbodiimide anti-hydrolysis agent;Skin layer is the modified PET resin of functional polysiloxane covalent grafting, wherein the functional polysiloxane has epoxy end group or isocyanate end group, and main chain has Si-H group;Surface layer is the fluorine-free low surface energy layer formed by polyvinyl long side chain alkane polysiloxane and residual Si-H group in skin layer through hydrosilylation reaction.The application significantly improves the durability of monofilament in humid heat environment, so that it is suitable for long-term humid heat service environment such as marine cable and industrial fabric, and can maintain stable mechanical strength and self-cleaning performance for a long time.

This invention discloses a chromium-free passivation and fingerprint-resistant composite treatment method for high-aluminum-zinc-aluminum-magnesium steel plates, belonging to the field of metal sheet surface protection technology. The specific steps of the method are as follows: A fine-grained high-aluminum-zinc-aluminum-magnesium steel plate is selected as the substrate, and firstly, it undergoes multi-stage cleaning and hot air drying. Next, the dried substrate is immersed in a composite chromium-free passivation solution to form a passivation precursor film. Then, a porous inorganic passivation layer is prepared through low-temperature hot air curing. Subsequently, a modified fingerprint-resistant resin is roller-coated onto its surface to form an organic precursor film. Finally, a constant-temperature curing treatment is performed to produce a chromium-free passivation and fingerprint-resistant composite film. This invention uses multi-stage cleaning and chromium-free passivation processes on the high-aluminum-zinc-aluminum-magnesium steel plate to form a porous inorganic passivation layer, enhancing corrosion resistance. Then, a composite protective film layer is constructed by reverse roller coating of modified fingerprint-resistant resin, achieving functional integration. This process improves the environmental protection and protective properties of the plate, meets the needs of multiple fields, and expands the application scenarios and market scope.

This application relates to a water heater device and its anti-scaling method. The water heater device includes a water heater body, a water pump, a heat exchanger, an inlet pipe, an outlet pipe, and a main controller. The water pump and heat exchanger are located within the water heater body. The water pump is connected to the inlet pipe, and the heat exchanger is connected to the outlet pipe. The water pump is used to pump the water flowing in from the inlet pipe to the heat exchanger. The method includes: after detecting that the water heater body has stopped operating, controlling the water pump to run, so that the water flows through the heat exchanger to remove the residual heat from the heat exchanger; obtaining the outlet water temperature of the water heater body; determining whether the outlet water temperature of the water heater body is less than or equal to a preset temperature threshold; if the outlet water temperature of the water heater body is less than or equal to the preset temperature threshold, controlling the water pump to shut off. The anti-scaling method for water heaters provided by this application can reduce hardware and maintenance costs, improve anti-scaling effect, and enhance ease of use.

The present invention belongs to the technical field of ultra-high molecular weight polyethylene protective nets, and specifically relates to a material for ultra-high molecular weight polyethylene protective nets and its preparation process. The material for ultra-high molecular weight polyethylene protective nets consists of two parts: an inner layer base fiber and an outer attached coating; the inner layer base fiber is composed of ultra-high molecular weight polyethylene resin powder, vinyl-terminated hyperbranched polysiloxane, mercapto-functionalized graphene oxide nanosheets, photoinitiator, modified hindered amine light stabilizer and antioxidant; the outer attached coating is composed of vinyl-terminated fluorosilicone resin liquid, microcapsule antifouling agent with capsaicin as the core material, methylated nano-silica particles, hydrogen-containing silicone oil and platinum catalyst; the material for ultra-high molecular weight polyethylene protective nets prepared by the present invention has excellent weather resistance, antifouling property and mechanical properties.

The application belongs to the technical field of reverse osmosis membrane manufacturing, and particularly relates to a high-efficiency antifouling and sterilization reverse osmosis composite membrane and a preparation method thereof. The high-efficiency antifouling and sterilization reverse osmosis composite membrane is formed by forming a polyamide desalination layer on a polysulfone base film, and then coating a copolymer of a zwitterion with double bonds and thioctic acid on the surface of the polyamide desalination layer. The zwitterion is any one of SBMA, VPPS and VPES. The product has the advantages of high flux, high desalination rate, excellent antifouling performance, stable operation and the like. The preparation method has the advantages of simple process, high industrial production efficiency, low cost, rapid copolymerization reaction and no need of additional catalyst, and is suitable for large-scale coating production.

This invention discloses a desalination and concentration system and process for waste acid in the sulfuric acid process for titanium dioxide production. The waste acid solution containing ferrous sulfite is evaporated and concentrated to a sulfuric acid concentration of 75-85%, then mixed with the waste acid from the titanium dioxide production process to a sulfuric acid concentration of 35-45%. After filtration, the ferrous sulfite solid is recovered. The waste acid after sedimentation enters a multi-effect evaporation system, where it is evaporated and concentrated to a sulfuric acid concentration of 50-65%, with most of it recycled for production. A portion of the 50-65% sulfuric acid is further concentrated to a concentration of 75-85% and mixed with the ferrous sulfite waste acid solution. Due to the common ion effect, a large amount of inorganic salts, especially sulfates, precipitate and crystallize. After crystallization and precipitation, the inorganic salts are recovered by filtration, and the supernatant enters the multi-effect evaporation system. This avoids the problem of large amounts of crystalline salt generated during the evaporation and concentration process causing blockages in system pipelines or equipment, ensuring long-term stable operation of the system.

The utility model relates to oxidation equipment technical field, the utility model provides a double -effect catalytic oxidation device, it includes the material pipeline, injects the pipe for injecting the reagent to the material pipeline, mixes the axle one end rotation setting on the lateral wall of material pipeline, can mix reagent and water through rotation, the box has the processing cavity with the material pipeline intercommunication, the board piece sets up on the lateral wall of box, and the board piece surface has titanium dioxide coating, the sleeve sets up on the lateral wall of box, the ultraviolet lamp tube sets up in the pipe cavity, is used for the illumination titanium dioxide coating on the board piece surface and mixed reagent and water. The titanium dioxide coating on the board piece surface is excited to produce electron -hole pair under the ultraviolet lamp tube illumination, and electron is captured to generate super oxygen free radical by O2, and the hole can directly oxidize organic matter or react with water to generate hydroxyl radical, simultaneously, titanium dioxide can also be used as catalyst to realize the efficient activation of H2O2, and continuously generate free radical. The problem that traditional catalyst is easy to pollute, deactivation has been solved.

The present application relates to the technical field of ceramic tiles, and particularly relates to a soft-light marble ceramic tile and a preparation process thereof. The preparation process comprises the following steps: S1. polishing the surface of the marble ceramic tile by using an elastic grinding block, a diamond grinding brush and a fiber brush in sequence; wherein the number of meshes of the elastic grinding block > the number of meshes of the fiber brush >= the number of meshes of the diamond grinding brush; S2. continuously coating soft-light wax on the surface of the marble ceramic tile; S3. continuously coating anti-fouling wax on the surface of the marble ceramic tile to obtain the soft-light marble ceramic tile. By using the elastic grinding block with high number of meshes, the diamond rubber brush with low number of meshes and the fiber brush in sequence to process the surface of the tile, the cutting amount of the tile surface in the polishing process is reduced, the concave-convex structure of the tile itself will not be excessively polished, the exposure of pores in the glaze layer is reduced, and the slip resistance and the stain resistance of the ceramic tile are effectively enhanced; then the soft-light wax and the anti-fouling wax are coated on the surface of the tile in sequence, the slip resistance and the stain resistance of the surface of the tile are improved, and meanwhile the ceramic tile has the characteristic of soft light.

This invention provides a multi-component transparent coating composition that yields a transparent coating film with excellent car wash resistance, polishability, and stain resistance. The multi-component transparent coating composition comprises a first liquid containing a hydroxyl-containing acrylic resin (A), a polycarbonate polyol (B), and a melamine resin (C), and a second liquid containing a polyisocyanate compound (D). The hydroxyl-containing acrylic resin (A) has a glass transition temperature exceeding 10°C, and the melamine resin (C) has a weight-average molecular weight of 400 or more and less than 4000. Relative to 100 parts by weight of the total solids of the hydroxyl-containing acrylic resin (A), the polycarbonate polyol (B), and the melamine resin (C), the content of the polycarbonate polyol (B) is 6 to 17 parts by weight, and the content of the melamine resin (C) is 1 part by weight or more and less than 10 parts by weight.

The application provides a hydrophilic anti-pollution MXene / PVDF composite membrane and a preparation method and application thereof, and relates to the technical field of separation membrane manufacturing.The preparation method of the hydrophilic anti-pollution MXene / PVDF composite membrane provided by the application comprises the following steps: mixing PVDF powder, a pore former and an organic solvent to obtain a PVDF casting solution; mixing the PVDF casting solution and a few-layer MXene nanosheet dispersion solution to obtain a MXene / PVDF casting solution; coating the MXene / PVDF casting solution onto a non-woven fabric, and sequentially performing coagulation bath and drying to obtain the hydrophilic anti-pollution MXene / PVDF composite membrane.The hydrophilic anti-pollution MXene / PVDF composite membrane provided by the application enhances hydrophilicity and improves BSA rejection rate, exhibits high anti-pollution property, excellent reusability and chemical stability, and has a simple process and is suitable for large-scale industrial production.

This invention relates to the field of architectural ceramics technology, disclosing a titanium sphene crystal frit, its preparation method, and its application. The raw materials include kaolin, titanium dioxide, quartz, potassium feldspar, calcite, and wollastonite. By pre-firing the titanium sphene crystal frit using this formula, the titanium sphene crystals are pre-dissolved in the glass phase. During the subsequent glaze firing process at 1200℃, the titanium sphene crystals melt again and precipitate a second time, resulting in an opaque glaze layer. This secondary crystallization enhances the chemical stability of the titanium sphene crystal frit during subsequent glaze firing, leading to a more stable increase in the solar reflectance of the fired glaze. This solves the problem of unstable reflectivity in glazes when directly using titanium sphene powder or combining it with titanium dioxide and titanium frit to directly form titanium sphene crystals during glaze firing.

The application discloses N-octyl-2-hydroxybenzamide grafted polyaspartic ester polyurea resin and a preparation method and application thereof, and the preparation method comprises the following steps: S10, uniformly mixing N-octyl-2-hydroxybenzamide grafted isocyanate prepolymer 15-35 parts, a solvent 2-10 parts and a catalyst 0.1-0.5 parts by weight to obtain an A component; S20, uniformly mixing polyaspartic ester 8-20 parts, a leveling agent 0.1-0.5 parts and a defoaming agent 0.1-0.5 parts by weight to obtain a B component; and S30, mixing the A component and the B component. The N-octyl-2-hydroxybenzamide grafted polyaspartic ester polyurea resin has better antifouling performance and mechanical properties than those of the prior art.