1211results about How to "With self-cleaning function" patented technology

The invention discloses a super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane, and a preparation method and an application thereof. According to the method, fabric mesh with a specification of 100-300 meshes is subjected to ultrasonic cleaning, and is air-dried under normal temperature; a hydrophilic polymer water-sensitive agent and a cross-linking agent are dissolved in water according to a ratio of 1:9-9:1; the mixture is well mixed by magnetic stirring, such that a solution with a concentration of 1-99% is prepared; nano-sol is prepared with a sol-gel method; the solution and the nano-sol are prepared into a mixed solution with a concentration of 1-99%, and the solution is well dispersed through ultrasonic dispersion; the mesh is soaked in the mixed solution and is vertically lifted, or the mesh is directly sprayed by using a high-pressure spraying gun; and the mesh is bake-dried, such that the super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane is obtained. Contact angles of the super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane with water and oil in air are both 0 DEG, and the membrane is super-hydrophilic. Under water, the contact angle of the membrane with oil drops is larger than 150 DEG, and the membrane has an oil drop low adhesion characteristic. The mesh membrane provided by the invention can be used in oil-water mixture separation and oil-containing sewage processing.

The invention provides a super-hydrophobic coating material, which comprises water or emulsifier or organic solvent, a polysiloxane compound having more than three silicon-hydrogen bonds and solid particles. The invention also provides the preparation method of the super-hydrophobic coating material and the preparation method of a super-hydrophobic coating. The invention provides the super-hydrophobic coating material which is prepared by a simple method, has high mechanical strength, is durable, practical and capable of self-cleaning and the preparation method of the super-hydrophobic coating material. The super-hydrophobic coating material provided by the invention can solidify in a wider temperature range and is applicable to substrates made of various materials such as metal, glass and high polymer materials.

The invention discloses an oxidized graphene-modified super-hydrophilic super-oleophobic oil-water separation film and a preparation method and application thereof. The method comprises the following steps: mixing a hydrophilic polymer water-sensitive agent and a cross-linking film-forming agent according to a ratio of 1:9-9:1, dissolving the mixture and nano-silica sol in water according to a mass ratio of 1:9-9:1, magnetically stirring uniformly to prepare a 1-99% solution, adding 0.5-1 percent of oxidized graphen as an inorganic cross-linking agent, and ultrasonically and uniformly dispersing; ultrasonically cleaning a fabric silk screen with the particle size of 100-300 meshes, drying at normal temperature, forming a film on the silk screen in a spraying, dip-coating or spinning manner, drying and cross-linking, thus obtaining the hydrophilic and underwater super-oleophobic oil-water separation film. The oil-water separation film has excellent swelling resistance and mechanical property after graphene cross-linking modification, has a contact angle of 0 degree with both water and oil in air and has high super-hydrophilic property; the film has a contact angle of 150 degrees with oil drops under the water and has the low-adhesion characteristic to oil drops. The film can be applied to separation of oil-water mixtures and treatment of oil-containing sewage.

The invention discloses a transparent super-hydrophobic coating material. The raw materials of the transparent super-hydrophobic coating material comprise gas-phase silica nano-particle dispersion liquid which consists of gas-phase silica nano-particles and a solvent, and a hydrophobic treating agent. The invention further discloses a preparation method of a transparent super-hydrophobic coating; a coating of a micro-nano structure is prepared by rubbing and coating a substrate with the gas-phase silica nano-particle dispersion liquid, and then the coating is subjected to surface hydrophobization treatment by the hydrophobic treating agent to obtain the transparent super-hydrophobic coating. According to the super-hydrophobic coating material provided by the invention, hydrophobization treatment manners can be changed flexibly according to the difference of coated substrates; the method for preparing the super-hydrophobic coating has low requirement on equipment; the using cost is extremely low; the method is simple; the coating application is convenient; a large-area high-efficiency super-hydrophobic coating can be prepared; the prepared super-hydrophobic has excellent super-hydrophobicity, high transparency, droplet impact resistance, temperature and pH stability, durability, and repeated rubbing and coating capacity, and can be applied to almost all currently known solid surfaces.

The invention provides an air conditioner indoor unit with a self-cleaning function. The air conditioner indoor unit comprises a case, a humidifying assembly, a spray opening and a heat exchanger of the indoor unit. The case comprises a skeleton and a housing, wherein the skeleton is used for supporting a fan and the heat exchanger of the indoor unit, and the housing covers the skeleton and is provided with an air inlet and an air outlet. The humidifying assembly comprises a water tank and an atomization device used for atomizing water in the water tank. The spray opening is formed in the case and located in the air inlet upstream position of the heat exchanger of the indoor unit and used for outputting water mist formed by the atomization device. The humidifying assembly starts the atomization device when the air conditioner indoor unit executes the self-cleaning function, so that the spray opening is utilized to spray out the water mist to flow through the heat exchanger of the indoor unit, and accordingly the frosting degree at the heat exchanger of the indoor unit is improved. The heat exchanger of the indoor unit operates a condenser mode after frosting, and accordingly attached contaminants are taken away by water formed by defrosting. According to the scheme, the problem that a self-cleaning air conditioner cannot generate enough condensed water in the dry environment, and consequently the self-cleaning effect is affected is solved.

The invention relates to a hydrophobic film, and specifically relates to a hydrophobic film with a self-cleaning function, and a preparation method thereof and an application thereof. The hydrophobic film is a polymer nanofiber film prepared through an electrospinning fiber technique, the surface of the hydrophobic film is subjected to nanocrystallization modification to improve the surface hydrophobicity, and the contact angle between the hydrophobic film and water is 140-180 DEG. According to the invention, the electrospinning fiber technique and the surface nanocrystallization technique are combined, the preparation technology is simple, and the prepared hydrophobic film has the self-cleaning function and a high porosity factor, and can be applied to fields of air purifying filters, film distillation and oil-water separation and the like.

The grating type pneumatic triphase fluidizing comprehensive absorption tower includes one housing, one gas inlet channel and gas outlet channel in the top of the tower, one rotary defogging and dewatering unit, one stuffing assembly comprising support boards, hold-down boards and stuffing, one coaxial tubular grating member, one liquid distributor with ring sprinkler pipe, one large caliber reverse sprayer inside the gas inlet channel, and one absorbing slurry pond in the bottom of the tower. It features the special grating structure, the regularly arranged stuffing for cyclic fluidizing, the combined foam absorption and stuffing absorption, etc, and has high absorption efficiency, great gas treating amount and other advantages.

The invention relates to an efficient burning furnace with a rotary fluidization grate. The burning furnace with the rotary fluidization grate consists of a feeding system, a burning system and a slagging system; moreover, a waste heat boiler and a flue gas treatment system are connected with the burning furnace to form a complete garbage burning and generating system. The feeding system consists of a feeding hopper, a pre-drying conveying device, an aggregate bin, a chute and a charge distributor. The feeding hopper is a receiving opening for feeding garbage into the burning furnace and is arranged in a garbage storage pit close to one side of the burning furnace. An outlet of the feeding hopper is connected with an inlet of the pre-drying conveying device. A material level switch is arranged in the feeding hopper, and gives an alarm to prompt an operator to feed materials when the material level is lower than a set value so as to ensure that the hopper is not empty. The outlet of the hopper can be selectively provided with a feeding device. The burning furnace has the advantages of high burning speed, high burning efficiency, high slag burning degree, easy control, lower energy consumption, low pollution, low cost and investment conservation, and is applicable to domestic garbage with low thermal value and high moisture; and the garbage does not need to be pretreated.

The invention belongs to the field of coatings, and relates to an ultraviolet light-cured self-cleaning coating, and a preparation method and an application thereof. The self-cleaning coating is obtained by mixing 30-80 wt% of a reactive fluorine-containing acrylic ester prepolymer, a acrylic ester prepolymer or a mixture of the above two 10-60 wt% of reactive fluorine-containing acrylic ester monomers, acrylic ester monomers or a mixture of the above two, 2-10 wt% of a photoinitiator, 0-40 wt% of a pigment, 0-30 wt% of an auxiliary agent and 1-30 wt% of a photocatalytic material, based on the total amount of the ultraviolet light-cured self-cleaning coating, grinding and stirring uniformly. The coating is coated on the surface of a substrate. The coated film can produce a photochemical polymerization and is cured under the irradiation of ultraviolet light. The cured film has the advantages of plump film, abundant colors, high hardness, good scratch resistance, good weather resistance and stain resistance, good self-cleaning feature and the like.

The invention discloses a preparation method of a transparent super-amphiphobic coating. According to the method, the coating is prepared by preparing a hybrid silica sol suspension by utilization of a sol-gel method, spraying the suspension on a surface of a glass substrate, and performing high-temperature oxidation and surface fluoroalkylsilane modification to obtain the coating. The water contact angle and the hexadecane contact angle on the surface of the coating are both larger than 150 degrees, and the water roll-off angle and the hexadecane roll-off angle on the surface of the coating are both smaller than 10 degrees. The permeability of the coating to visible light is good. The average light transmittance is larger than 75%. The method is easily available in raw material, simple in technology and good in repeatability. The coating has excellent super-hydrophobicity, superoleophobicity and transmittance.

The invention discloses a hydrophilic oleophobic polymer and preparation method thereof, and application thereof in humidity response oil and water separating membrane. The preparation of the hydrophilic oleophobic polymer comprises the following steps: carrying out an esterification reaction of polyvinyl alcohol and perfluorocarboxylic acid or firstly carrying out a carboxylation of polyvinyl alcohol and then a neutralization reaction of the intermediate product and perfluorotertiary amine. When the product is used, a fabric silk screen is cleaned with ultrasonic sound; 10-50 parts of hydrophilic oleophobic polymer, 50-500 parts of nanometer sol, 1-5 parts of cross-linking agents and 1-5 parts of catalysts are dispersed uniformly; the mixed liquor is dip-coated or spray-coated on the surface of the membrane, and after drying and crosslinking, the humidity response super-hydrophilic and super-oleophobic oil and water separating net membrane. According to the invention, hydrophilic groups are distributed surrounding the hydrophobic chain segment on the surface of the net membrane with humidity responsiveness, and contact angle in the air of the product to water is reduced to 0 degree from more than 90 degrees, and the contact angle in air and water of the product to oil is above 150 degrees, so the product has a low adherence characteristic of droplet. The net membrane is used for separating oil and water mixture and processing oil-containing sewage.

The invention discloses a super-hydrophilic and underwater super-oleophobic oil-water separation mesh film and a preparation method thereof. The method comprises the following steps: ultrasonically cleaning a fabric silk screen and airing at normal temperature; preparing polymer emulsion particle microspheres of which the particle size distribution is 100-500nm and the surface is rich in carboxyl salt by adopting an emulsion polymerization, and preparing nano-silica sol by adopting a sol-gel method; preparing hydrophilic emulsion particles and the nano sol into a mixed solution and performing uniformly ultrasonic dispersion; immersing the silk screen into the mixed solution, vertically lifting up, or directly spraying by adopting a high-pressure spray gun, and drying to obtain the super-hydrophilic and underwater super-oleophobic oil-water separation mesh film. The surface of the oil-water separation mesh film has a spherical rough micro-nano binary structure, contact angles with water and oil in air are 0 degree, and the oil-water separation mesh film has the super hydrophilicity. A contact angle with oil drops under water is larger than 150 degrees, and the oil-water separation mesh film has low adhesion properties on the oil drops. The mesh film can be applied to separating oil water mixtures and treating oily sewage.

The invention discloses a UV cured super-hydrophilic and underwater super-oleophobic oil-water separation membrane, its preparation method and an application thereof. The preparation method comprises the following steps: carrying out ultrasonic cleaning on a fabric silk screen; preparing nano sol by a sol-gel method, mixing 10-50 parts of a single-function UV cured oligomer, 60-80 parts of a bi-functional UV cured oligomer, 10-20 parts of multifunctional UV cured oligomer, 200-500 parts of silica sol, 1-5 parts of a waterborne photoinitiator and 1-5 parts of an emulsifier, and uniformly dispersing; coating a mixed liquor on the surface of a membrane by a dip-coating or spray process, drying, and carrying out UV curing to obtain a product. The surface of the oil-water separation membrane has a hydrophilic polymer molecular brush structure based on the micro-nano dual structure. The contact angle of the membrane to water and oil is 0 degree in the air, and the membrane has super-hydrophilicity. The contact angle of the membrane to oil drops is greater than 150 degrees underwater, and the membrane has low adherence to oil drops. The membrane provided by the invention can be used in separation of an oil-water mixture and treatment of oily sewage.

The invention discloses a preparation method of a self-cleaning antireflection film with the photocatalytic function on the surface, relating to the field of solar photocatalysis. The method comprises the following steps of: proportionally mixing silica sol obtained through the acid catalysis and the base catalysis of acetate orthosilicate; firstly, coating an antireflection film on a clean glass surface by using a czochralski method; then, coating a layer of titania sol prepared through the hydrolysis of N-butyl titanate; and solidifying at 120 DEG C for 2 h and thermally treating at 500 DEG C for 2 h to obtain the self-cleaning antireflection film with the transmittance over 96 percent and the photocatalytic function on the surface. The antireflection film on the glass surface has higher transmittance while ensuring the firm combination with the glass; and the surface of the antireflection film has the photocatalytic function and the self-cleaning function.

The invention provides a method for manufacturing a metal surface self-cleaning high-protection film. The method comprises two steps of molybdate solution soaking treatment and plant corrosion inhibitor-low-surface-energy material collaborative modification treatment. According to the molybdate solution soaking treatment step, a composite film which is of a specific micro / nano coarse structure, has the good protection effect and is composed of metallic oxides, molybdenum oxide and metal molybdate can be formed on a metal surface, and therefore according to the plant corrosion inhibitor-low-surface-energy material collaborative modification treatment step, efficient green plant corrosion inhibitors can be introduced into the film, and the protection effect can be obviously improved. Due to the hydrophobization effect of the low-surface-energy material on the film, the film has the self-cleaning function, the pollution can be avoided, the probability of direct contact of metal materials and corrosive media can be reduced, and the protection effect of the film can be further improved. The method has the advantages of being environmentally friendly, simple in process, convenient to operate, capable of being easily and industrially produced in a large-scale mode and the like.

The invention discloses a preparation method of a blazing-angle-variable blazed grating and a double-blazed grating and products, and belongs to the technical field of image impressing. According to the preparation method of the blazing-angle-variable blazed grating and the double-blazed grating, a target grating image on a hard template is transferred to a soft template, and an impressing rubber layer is prepared on a base sheet; the target grating image on the soft template is impressed on the impressing rubber layer, the inclination of the soft template is controlled through the intensity of pressure to further control a blazing angle of a primary blazed grating, and the primary blazed grating is further obtained in an etching mode; a hard mask layer is deposited on the primary blazed grating; an impressing rubber layer is prepared on the hard mask layer; the target blazed grating image on the soft template is impressed on the impressing rubber layer, the inclination of the soft template is controlled through intensity of pressure to further control a blazing angle of a secondary blazed grating, the secondary blazed grating is obtained in an etching mode, and the double-blazed grating is prepared. According to the preparation method of the blazing-angle-variable blazed grating and the double-blazed grating and products, the pressure is controlled when the image on the soft template is transferred to the base sheet, the blazed grating having different blazing angles is obtained, the quality of the blazed grating is guaranteed, and meanwhile cost is lowered.

The invention belongs to the technical field of preparation of oil-water separation membranes and discloses a superhydrophilic and superoleophobic oil-water separation membrane with humidity responsiveness as well as a preparation method and an application of the oil-water separation membrane in oily sewage treatment and oil-water separation. The oil-water separation membrane is prepared with the method comprising the following steps: inorganic nanoparticles are prepared, subjected to oleophobic modification through a perfluoroalkyl siloxane solution and mixed with a prepared hydrophilic coating, and a hybrid hydrophilic coating is obtained; a silk screen is coated with a UV cured water-based anticorrosive coating with a dip coating or spray coating method, and an anticorrosive base coat membrane is obtained; the anticorrosive base coat membrane is coated with the hybrid hydrophilic coating with the dip coating or spray coating method, dried and cured, a micro-nano coarse structure is constructed, and the superhydrophilic and superoleophobic oil-water separation membrane with humidity responsiveness is obtained. The separation membrane has an initial contact angle with water in air being 150 degrees, the angle is reduced to 0 degree within 10-30 min, and the separation membrane has a contact angle with oil drops either in air or underwater being larger than 150 degrees all along.

The invention discloses a two-channel optical fiber method and two-channel optical fiber sensor for measuring turbidity. The method is characterized in that a detection mode adopting double light sources, four laser beams and four photo-electricity is adopted, and the double different-wavelength light sources can be alternately lightened by an optical measuring module, so that 90-degree scattered lights and transmission lights can be alternately measured; a temperature measuring module is used for collecting temperature signals of water; a signal adjusting module is used for processing collected turbidity signals and temperature signals; a data processing module is used for calculation and treatment so that turbidity values and a temperature values are generated, and the in-site collecting data are transmitted to an upper computer. The different-wavelength light sources are simultaneously measured so that the stray light impact on turbidity measurement is eliminated; the external impact on the light signals is avoided through optical fiber transmission, thus the method has the high-temperature and high-pressure resisting performances and the anti-electromagnetic interference performance; temperature compensation is performed on the measured turbidity values so as to improve the measurement precision of turbidity. In-site online detection for the turbidity values is realized by the method, thus the method is high in sensitivity, excellent in linearity, low in cost and easy to carry and install, and the method is applied to narrow detection space and occasions where detected liquid is limited in capacity.

The invention relates to the technical filed of cement equipment, in particular to a cement tank device with a self-cleaning function and elastic type wall scrapers. The cement tank device comprises a cement tank shell. A bearing is arranged in the middle of the upper surface of the cement tank shell. A telescopic air cylinder is arranged in the bearing. A cylinder shaft of the telescopic air cylinder is inserted into the cement tank shell in a penetrating mode to be connected with a stirring shaft. A gear B is arranged in the middle of the telescopic air cylinder. Extensible spring sleeves are arranged at the two ends of a shaft rod of the stirring shaft correspondingly. Scrapers are connected to the outer ends of the extensible spring sleeves correspondingly. A boss is arranged on the left side of the upper surface of the cement tank shell and provided with a support. The support is provided with a rotary motor. A gear A is arranged at the motor shaft end of the rotary motor and sleeved with a chain. The gear B of the telescopic air cylinder is sleeved with the other end of the chain. The cement tank device has the advantages of being simple in structure, convenient to operate, capable of removing cement material on the tank wall fast and also capable of smashing small-block-shaped cement materials fast in a vibrating mode, high in speed and high in work efficiency.

The invention belongs to the technical field of surface treatment, and relates to a preparation method of a super-hydrophobic aluminum surface with a self-cleaning function. The preparation method comprises the following steps: (1) pretreatment: grinding, cleaning and drying an aluminum sample in sequence to obtain a clean sample; (2) chemical etching: putting the sample subjected to pretreatment into a chloridized molten iron solution for soaking at room temperature, then taking out the sample to clear away dirt on the surface, and drying the sample in air; and (3) surface modification: placing the sample subjected to chemical etching treatment into a low-surface-energy reagent for soaking at the room temperature for 1 to 2 h to form a layer of hydrophobic thin film on the surface of the sample, then taking out the sample, and placing the sample into a constant-temperature drying box for drying to obtain the super-hydrophobic surface. The preparation process is simple, and the raw materials are readily available; preparation of the super-hydrophobic aluminum surface with the self-cleaning function can be realized under an atmospheric environment; the contact angle for water is about 150 degrees; and the prepared super-hydrophobic aluminum surface with the self-cleaning function is good in self-cleaning and hydrophobization effect.

The invention relates to a sowing machine, in particular to a sowing machine with the function of monitoring in real time; the sowing machine comprises a frame, a seed box, a seeding mechanism, a grain conductor and a monitoring device which is arranged on the grain conductor; a sensor unit in the monitoring device uses a photoelectric sensing mode of a grid grating to cover the whole section of the grain conductor and carry out independent monitoring to each grid, thus better realizing the monitoring to resowing. A monitoring method provided by the invention is simple and effective, has high accuracy and function of self-cleaning and improves the stability of monitoring; as the cost is low, the sowing machine with the function of monitoring in real time related to the invention has popularization.

The invention discloses a method for on-line detecting water quality, which comprises the following steps: a. sample collecting, wherein, water sample in the test environment is collected and delivered to pretreatment device; b, pretreatment, wherein, water sample flows out from an inlet tube into a water container after flowing through a filter screen, wherein, the angle formed between the water velocity attitude and the filter screen is an acute or a right angle; and c. measuring, wherein, the water sample to be tested is collected from the water container, and the water parameter is obtained by analyzing the test water sample to be tested. The invention also discloses a system for on-line detecting water quality. The invention has the advantages of continuous working, uneasy blockage, low cost, and the like, and the invention can be applied in various water sample on-line analysis.

The invention relates to a corner membrane filter plate assembly which comprises the flat membrane filter plate and the filter cloth filter plate. Both the flat membrane filter plate and the filter cloth filter plate are single-corner feeding through holes and are arranged in cross banding. The corner membrane filter plate assembly has the advantages that: 1. portholes have self-cleaning function, thus being capable of keeping the portholes smooth without obstacles; 2. rapid filter of slurry is realized; 3. a filter cake can be convenient to be washed either in a forward direction or a reverse direction, therefore, the filtering ratio of effective components in filtered slurry is greatly increased, and a feeding pump and a washing pump can share a pump; 4. by adjusting the thickness of a core board, the requirements for the thickness of the filter cake from different materials can be met; 5. a supporting lug boss can be arranged on the membrane filter plate or no supporting lug boss is arranged on the membrane filter plate; 6. no filter cloth is installed on the flat membrane filter plate.

The invention relates to a structure of a micromechanical cantilever for simultaneously realizing driving and self-cleaning by utilizing a single integrated resistor, and a manufacturing method and application thereof, and belongs to the field of micromechanical sensors. The invention is characterized in that an integrated driving resistor is manufactured on the surface of the fixed end of the cantilever, and a sensitive film with specific recognition is deposited on the surface of the free end of the cantilever. When a certain AC-DC overlap current is applied on the driving resistor, the current can drive the cantilever to reach a resonance condition, so that the cantilever serves as a sensor to detect a specific chemical substance. When the detection is finished, the driving resistor serves as a heater to increase the temperature of the cantilever by increasing the current applied on the driving resistor so as to accelerate the desorption of the adsorbed chemical substance, realize the self-cleaning of the sensor, and realize quick repeated detection. The invention has the characteristics of simple structure, convenient manufacture and easy realization.

The invention belongs to the technical field of radiation cooling, and particularly relates to a radiation cooling coating with a self-cleaning function and a preparation method thereof. The radiationcooling coating comprises a bottom layer binder, and a radiator and hydrophobic nano particles, which are covered on the bottom layer binder; and an infrared emission peak of the radiator is positioned within an infrared radiation waveband range of 8 to 13 mum and at least covers one wave band interval in the range of 8 to 13 mum. According to the invention, by utilizing high hydrophobicity of the nano hydrophobic particles, the radiation cooling coating has a self-cleaning effect and a phenomenon of reducing the cooling effect due to dust accumulation is avoided. The radiation cooling coating disclosed by the invention has high emissivity on the wave band of 8 to 13 mum, is large in transmittance on a visible light wave band, is excellent in lighting performance, can also reduce absorption on energy on the rest of wave bands and ensures the cooling effect. The radiation cooling coating further adopts two different particle sizes of radiators, so that the radiation range is widened, ground heat is radiated to the outer space to the greatest degree, and the cooling effect is improved.

The aim of the invention is to provide a method for synthesizing polyesteramide reverse osmosis membrane, obtain a new polyesteramide reverse osmosis membrane and effectively solve the problems of the prior art that the energy consumption of the reverse osmosis membrane is large, the pollution resistance is poor, the reverse osmosis membrane is needed to change and wash frequently, the application range is limited, etc. The invention has the advantages that the method of the invention can be used to obtain the new polyesteramide reverse osmosis membrane, the fast aggregation of contaminants can be effectively prevented and the reverse osmosis membrane is not needed to change frequently, thus the application scope of the reverse osmosis membrane becomes wider.

The invention discloses a fire-retardant coating with photo-catalytic performance and a preparation method thereof, belonging to the field of fire-retardant coatings. The coating comprises a base material, a catalyst, a charring agent, a foaming agent, a filler, a pigment, a solvent, a dispersant, a drier, a drying aid, a nano mother solution and the like, wherein the base material is aluminum dihydrogen phosphate, the catalyst is ammonium polyphosphate, the charring agent is pentaerythritol, the foaming agent is melamine, the filler is ultra-fine slag powder, the pigment is Cu-La / TiO2, the solvent is water, the dispersant is a BYK180 polymeric dispersant, the drier is lead oxide, the drying aid is zinc powder, and the nano mother solution is a nano SiO2 mother solution. The fire-retardant coating disclosed by the invention reduces the environment pollution to the maximum extent by using industrial waste residues as the filler; meanwhile, the coating has a function of realizing photocatalytic degradation of formaldehyde gas under a visible light source to endow conventional fire-retardant coatings with a brand-new function, and the fire-retardant coating accords with the development trend of national green ecological building materials.

The invention discloses a self-cleaning superhard polysilazane hydrophobic coating and a preparation and use method thereof, and belongs to the technical field of super-hydrophobic coatings. The self-cleaning superhard polysilazane hydrophobic coating is prepared from the following components in parts by weight: 5 to 25 parts of organic-inorganic hybridized polysilazane, 15 to 30 parts of hydrophobic acrylate resin, 5 to 15 parts of nanometer silicon dixoide and 40 to 250 parts of organic solvent. The self-cleaning superhard polysilazane hydrophobic coating has the advantages that the excellent superhard, super-hydrophobic, scratch-resistant, abrasion-resistant and high-adhesion properties of a coating are realized; the defects of easiness in cracks, voids and the like in the inorganic polysilazane coating along with the increase of coating thickness are overcome; the problem of low hardness of the organic polysilazane is solved; the coating has the advantages that the hardness is high, the adhesion force is high, the easiness in falling and cracking of the coating is avoided, and the abrasion-resistant and scratch-resistant properties of the coating are ensured; the preparation technology is simple, the implementing is easy, and the preparation technology is suitable for widely popularized and applied.

The invention relates to a method for preparing an aluminum alloy superhydrophobic self-cleaning surface by using an ultrashort pulse laser, belonging to the technical field of metal substrate surface modification. The method comprises the following steps: carrying out polishing pretreatment on an aluminum alloy sample, cleaning the sample surface respectively with deionized water and anhydrous ethanol, blow-drying with cool air or drying in air, and carrying out surface treatment on the sample by using a laser processing technique after adjusting related technological parameters by an ultrashort pulse laser so as to obtain countless microstructures on the sample surface; and after finishing processing, putting the processed sample into an electrothermal drying box, and baking to obtain the aluminum alloy superhydrophobic surface with a micron-sized mastoid or porous structure on the surface, wherein the surface has the self-cleaning function and has excellent friction resistance and corrosion resistance. The preparation method has the advantages of simple technique, high efficiency, low energy consumption, low cost and environment friendliness, is convenient to operate, and can easily implement industrial application.

The invention provides an internal sealing specific pressure-regulable fixed-ball ball valve, which comprises a valve body, a bonnet, a ball, a floating valve seat, valve packing and the like, wherein a plurality of sets of short adjusting screw units are mounted on the sidewall of the bonnet and are connected with a round hole plate, plungers, springs and the floating valve seat in a valve cavity, the sealing specific pressure between the ball and the floating valve seat can be regulated by rotating short screw lifters outside the sidewall of the bonnet, a plurality of sets of long adjustingscrew units are mounted on the sidewall of the bonnet as well, and can regulate the sealing specific pressure upon the valve seat packing outside the sidewall of the bonnet, and because of the adoption of the the mechanism, the faults of jam and leakage can be eliminated when the valve is in use. The internal sealing specific pressure-regulable fixed-ball ball valve also comprises an automatic dirt-scraping unit, and thereby having longer operability and sealing property.