33results about How to "Stable superhydrophobic properties" patented technology

The invention discloses a super-hydrophobic paper and a production method thereof. The production method comprises the steps as follows: forming a modified nanometer silicon dioxide coating with the particle size of 50-100 nm on the surface of general paper with texts or pictures, wherein the water contact angle on the surface of the paper is more than 150 DEG and the rolling angle of a water drop on the surface of the paper is less than 10 DEG. The texts and the pictures on the surface of the super-hydrophobic paper are clear, so that the super-hydrophobic paper has a wide application prospect in the fields of self cleaning, water and moisture prevention, book magazine and the like. The production method is simple in process, low in cost, environment-friendly and easy for industrialization, and does not need complex chemical treatment and expensive instrument equipment.

The invention provides a superhydrophobic acrylic resin paint. The paint comprises a nanoparticle, an acrylic resin, a mixed solvent, and heptadecafluoro trimethoxy ethoxy silane, wherein the ratio of the nanoparticle to the acrylic resin to the mixed solvent to heptadecafluoro trimethoxy ethoxy silane is 100:20-60:20-600:3-10. When the paint is sprayed on the surface of a solid, the contact angle of water drops on the surface is 150-160DEG, and the roll angle of the water drops on the surface is less than 10DEG. The superhydrophobic acrylic resin paint of the invention, which has the advantages of low cost, simple construction technology and small pollution to environment, has a good industrialized application prospect.

The present invention discloses a super-hydrophobic polystyrene thin film, which is a loose, porous and white thin film, the thin film consists of polystyrene microspheres with the diameter of 1 to 4 Mum, the diameter of a pore is 10 nm to 10 Mum; a contact angle between the thin film and the water is between 150 degrees and 165 degrees, and a rolling angle of the drops on the surface of the thin film is less than 10 degrees. The preparation steps include that: (1) a certain amount of polystyrene particles are weighed and dissolved in the solvent, so as to form the polystyrene solution with the concentration of 1 to 50gL ^{minus 1}; (2) 20 percent to 60 percent of the volume of the solution of the ethanol is added in the polystyrene solution and is stirred rapidly; (3) the polystyrene solution which is added with the ethanol is spread on a foundation base by using a flow casting method, and the super-hydrophobic polystyrene thin film is prepared by drying naturally for 8 to 12 hours at the room temperature and the atmospheric environment. The thin film is tasteless and non-toxic, which has very broad application prospect in the liquid non-loss transportation, self-cleaning, water-proofing, and moisture-proofing and other fields. The preparation method has simple operational process, good controllability, low cost, no need of complicated chemical treatments, no need of the expensive equipments and easy industrialization.

The invention belongs to the technical field of superhydrophobic material preparation and provides a novel preparation method of superhydrophobic glass. The novel preparation method comprises the main steps of 1, cleaning the surface of glass by anhydrous ethanol, acetone, hydrogen peroxide and concentrated sulfuric acid, 2, adding spherical nano-silica particles into anhydrous ethanol and fully stirring to obtain a nano-silica solution having a concentration of 0.01 to 10.0wt%, 3, immersing the glass in the nano-silica solution for 1 to 30 minutes, slowly and vertically pulling out the glass from the nano-silica solution, and drying the glass in a vacuum drying oven having a temperature of 100 to 500 DEG C for 1 to 10 hours, and 4, through low-surface energy materials of heptadecafluoro-trimethoxyethoxysilane and stearic acid, modifying the surface of the glass treated by the step 3 to obtain the superhydrophobic glass which is transparent.

The invention discloses a method for preparing a super-hydrophobic aluminum alloy surface. The method comprises the following steps: (1) firstly carrying out mechanical grinding and polishing on an aluminum alloy plate, removing surface defects and an oxide film, and cleaning with deionized water; (2) mixing 0.08mol/L oxalic acid solution and 1mol/L hydrochloric acid solution with mass concentration of 3.7% according to based on the volume ratio of 1:1, fully stirring and preparing mixed acid solution; (3) immersing an aluminum alloy plate into the mixed acid solution for 12-18 hours, then taking out the aluminum alloy plate, fully cleaning with the deionized water, then immersing into 0.5mol/L potassium permanganate solution for soaking for 1-2 hours, then cleaning with the deionized water, and drying at the furnace temperature of 80-100 DEG C for 0.5-1.5 hours; and (4) soaking in stearic acid ethanol solution with mass fraction of 1% for 25-35 minutes, and drying in atmosphere environment with relative humidity of 60-75% and at room temperature for 20-28 hours, thus preparing the aluminum alloy super-hydrophobic surface. The operation process is simple, the controllability is good, the cost is low, the complicated chemical treatment is not required, expensive equipment is not required, and the method is easy for industrialization.

The present invention discloses a super-hydrophobic polystyrene thin film and a preparation method thereof. The fresh taro leaves are placed in a casting mould; the poly dimethyl siloxane (PDMS) prepolymer, the catalyst and the crosslinker thereof are mixed by the proportion of 100: 0.1 to 2: 1 to 10 and are stirred for 5 to 10 minutes, the bubbles in the mixture are drawn out, then the mixture is casted on the fresh taro leaves in the mould, the solidification is carried out for 18 to 30 hours at the room temperature and the atmospheric environment, after that, a PDMS soft template is torn out; the polystyrene-tetrahydrofuran solution with the concentration of 1 to 70 mg/ml is casted on the PDMS template and is torn out after drying for 8 to 12 hours at the room temperature and the atmospheric environment, so as to get the taro leaf super-hydrophobic polystyrene thin film. A contact angle between the thin film and the water is more than 150 degrees, and a rolling angle is less than 10 degrees. The thin film is tasteless and non-toxic, which has very broad application prospect in the liquid non-loss transportation, self-cleaning, water-proofing and moisture-proofing and other fields. The method has simple operational process, good controllability, low cost, no need of complicated chemical treatments, no need of the expensive equipments and easy industrialization.

The invention provides a super-hydrophobic polypropylene film and a preparation method thereof, belonging to the technical field of superhydrophobic film materials. The invention solves the problems of too high preparation cost, complex process, and the like in the traditional super-hydrophobic polypropylene film. The surface structure of the super-hydrophobic polypropylene film is similar to the surface structure of natural taro leaf. The preparation method for the super-hydrophobic polypropylene film comprises the following steps of: placing the fresh taro leaf into a casting mold, mixing and stirring liquid room temperature vulcanizing silicone rubber with a catalyst and a crosslinking agent thereof in proportions, pumping air bubbles in the mixture, and then pouring the mixture on the fresh taro leaf in the mold, and finally obtaining a vulcanized silicone rubber soft template after curing in an atmospheric environment at a room temperature. By casting polypropylene solution with the concentration of 1 to 100 mg/ml onto the vulcanized silicone rubber soft template, and then drying in the atmospheric environment at the room temperature and tearing off, the super-hydrophobic polypropylene film is obtained. The super-hydrophobic polypropylene film has the advantages of simple preparation process, good reproducibility, and very good industrial application prospect without needing any expensive equipment.

The present invention discloses a super-hydrophobic high-density polyethylene thin film and a preparation method thereof. A certain amount of high-density polyethylene particles are firstly weighed and dissolved in xylene at 100 to 140 DEG C, so as to form the high-density polyethylene solution with the concentration of 1 to 50mg/ml; then 1 percent to 60 percent of the volume of the solution of ethanol is added in the high-density polyethylene solution; the high-density polyethylene solution which is added with the ethanol is spread on a foundation base by using a flow casting method, and a white thin film which is prepared by drying for 8 to 12 hours under the environment of the relative humidity of 60 to 75 percent and the temperature of 5 to 25 DEG C is the super-hydrophobic high-density polyethylene thin film. The present invention is the super-hydrophobic high-density polyethylene thin film with simple production, stable performance and low cost. The provided method has simple operating process, good controllability, low cost, no need of complicated chemical treatments, no need of the expensive equipments and easy industrialization.

The invention provides a super-hydrophobic polypropylene film and belongs to the technical field of super-hydrophobic films. The super-hydrophobic polypropylene film solves the problem that the existing super-hydrophobic film needs specific processing equipment or complex technical processes, consequently, the cost is high, and industrialization is difficult to realize. The surface of the super-hydrophobic polypropylene film is honeycomb-shaped, and a contact angle between the film and water is 150 degrees-170 degrees. The super-hydrophobic polypropylene film is stable in super-hydrophobic property, convenient to prepare, simple in process procedure, good in reproducibility, free of needs of any expensive equipment and complex chemical treatment process and low in cost, has good industrialization application prospects, and is suitable to large-scale industrialization production.

The invention discloses a porous super hydrophobic polypropylene film and a preparation method thereof. The aperture distribution range on the surface of the porous super hydrophobic polypropylene film is 100 nanometers to 10 micrometers, the average aperture is 650 nanometers to 1 micrometer, a contact angle of the surface of the film with water is 150-165 degrees, and roll angles of water drops on the surface of the film are below 5 degrees. The preparation method comprises the following steps of: uniformly mixing polypropylene granules and polystyrene granules in a mixer according to a mass ratio of (1-10):1; preparing the mixed materials into a film semi-finished product consisting of polypropylene and polystyrene by adopting a tape casting method, an extruding method or a calendering method; putting the film semi-finished product in chloroform or tetrahydrofuran for soaking so as to ensure that the polystyrene contained in the film semi-finished product is sufficiently dissolved; and then taking out and drying to obtain the porous super hydrophobic polypropylene film. The porous super hydrophobic polypropylene film has stable super hydrophobic property, good super hydrophobic effect, simple preparation process, good controllability, low production cost and environmental protection.

The invention relates to the technical field of super-hydrophobic materials, particularly to low-quantitation super-hydrophobic filter paper and a preparation method thereof. According to the invention, the bonding strength and the effective bonding capacity between a coating and paper can be improved, so that the filtering function can be effectively played for a long time; the preparation methodis simple, convenient, easy to implement, environmentally friendly, easy to operate, free of expensive instruments and equipment and suitable for industrialization; and 20-200 nm modified nano silicon dioxide, a 20-50 [mu]m microcrystalline cellulose micro-nano coating and a hydrophobic layer are constructed on the surface of modified filter paper to form the super-hydrophobic filter paper, wherein the water contact angle of the surface of the paper is greater than 150 DEG, and the rolling angle of the water drops on the surface of the paper is less than 10 DEG.

The invention discloses a micro-nanometer silicon carbonization super hydrophobic anti-rotten wood bamboo. The wood body forms a layer of micro-nanometer silicon carbonization super hydrophobic film which is a dense porous film comprising micro-balls that is formed by mixing silicon with diameter of 1-4Mum, silicon carbide and Silica. The diameter of the pore is 10nm to 10Mum. The preparation steps include: (1)putting the awaiting treatment material into the die; (2)weighing the micro-nanometer silicon powder, of which the particle size is less than 500nm; and putting the micro-nanometer silicon powder into the die till the awaiting treatment material is emerged; raising the pressure in die to 50-100MPa for 2 to 10 hours by a press machine; lowering the pressure to 0MPa to get out and to open the awaiting treatment material; removing the silicon on the surface by sanding machine to get the silicon wood. (3) putting silicon wood into the hot press machine which is quickly closed with the pressure rising to 1-6MPa; keeping the pressure for 1-10min; keeping the temperature of the hot platen of the hot press machine from 300 DEG C to 600 DEG C; getting out and obtaining the micro-nanometer silicon carbonization super hydrophobic anti-rotten wood bamboo. With simple operation technique, good control and low cost, the preparation method does not need the complex chemical treatment and expensive equipment which is easy industrialized.

The invention discloses a preparation process of a fluorine-free superhydrophobic surface. The process comprises the following steps: putting metal aluminum into a hydrochloric acid solution of copperchloride, performing a reaction to obtain a sample having a rough structure, uniformly coating the sample by using a prepared rosin ethanol solution, and performing drying to obtain a sample having ahigh contact angle and a small rolling angle with water. According to the process provided by the invention, the fluorine-free low-price environmentally-friendly superhydrophobic surface can be easily prepared on the metal aluminum by chemical corrosion and rosin coating methods, and the process is simple and easy to operate; a rosin coating is used to replace a traditional modified fluoride molecular layer, so that the mechanical stability of the superhydrophobic surface is greatly improved, and the production costs are reduced; and the prepared superhydrophobic surface has the characteristics of self cleaning, icing resistance and drag reduction.