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

The present invention provides a preparation method for a super-hydrophobic polypropylene film, and belongs to the technical field of super-hydrophobic films. In the prior art, the existing super-hydrophobic film production requires special processing equipment or a complex process, such that cost is high, and industrialization is difficultly achieved. With the present invention, problems in the prior art are solved. The preparation method for the super-hydrophobic polypropylene film comprises the following steps: (1) weighing a certain amount of a polypropylene particle material, and dissolving in a solvent to form a polypropylene solution with a concentration of 1-100 mg / ml; (2) carrying out casting of the polypropylene solution on a substrate, and drying under an environment with a relative humidity of 75-85% and an ethanol vapor concentration of 5-20% to obtain the super-hydrophobic polypropylene film. The preparation method of the present invention has characteristics of simple process, good reproducibility, no requirement of any expensive equipment, no requirement of complex chemical treatment processes, low cost, and good industrial application prospects, and is suitable for large-scale industrial production.

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 discloses a carborundum super-hydrophobic antiseptic wood-bamboo; the surface is a dense porous shallow layer which is formed by 1-4Mum-diamter microspheres composed of carborundum, wherein, the pore diameter is 10nm-10Mum. The preparation steps comprise: (1) the material to be treated is put into a die; (2) arbitrary proportion of micro-nano-silicon and magnesium silicide powder isbalanced to uniformly stir with a catalyst addition with a mass percentage of 0.01-1.5 percent; the micro-nano-silicon powder, the magnesium silicide powder and the catalyst with a grain diameter of less than 500nm are added to the die to submerge the material to be treated; the pressure in the die is lifted to 50-100MPa on a press and held for 2-10h; the pressure is lowered to 0MPa, when the material is taken out, cracked and frosted by a sanding machine to reveal the surface, thus deriving the treated material; (3) the treated material is put in a hot press that is quickly closed; then the pressure is lifted to 1-6MPa and maintained for 1-120min, when the temperature of a hot pressboard is 200 DEG C to 600 DEG C, carborundum super-hydrophobic antiseptic wood-bamboo is derived. The method for preparing carborundum super-hydrophobic antiseptic wood-bamboo has the advantages of simple operation technology, good controllability, low cost, no complicated chemical treatment, no expensive equipment and industrialization facilitating.

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 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 method for preparing a superhydrophobic surface of a fiber-reinforced epoxy resin-based composite material. Proportionally mixed to form the outer coating resin system; another epoxy resin and curing agent were weighed and mixed to form the middle layer resin system; the outer coating resin system was first coated in a molding mold, and the first layer of fiber was laid Reinforcement material; then coat the intermediate layer resin system on it, and lay the second layer of fiber reinforcement material; then repeat the intermediate layer resin system on it, and so on, to obtain the composite material preform; finally after curing , acid leaching, taking out, and drying to obtain the superhydrophobic surface of the fiber-reinforced epoxy resin-based composite material. The preparation method of the invention has the advantages of simple operation process, good controllability, good reproducibility, low cost, environmental protection and safety, excellent product quality and the like.

The invention belongs to the field of a super-hydrophobic composite material and a preparation method thereof and specifically discloses a polymer-matrix composite material with a super-hydrophobic surface and a preparation method thereof. The polymer-matrix composite material comprises a composite material body and a super-hydrophobic coating coated thereon, wherein, the composite material body is a carbon fiber or glass fiber reinforced composite material, and a microgranitic structure with the diameter of 10 mu m-30mu m is distributed on the super-hydrophobic coating; and the contact anglebetween the surface of the super-hydrophobic coating and water is 150-160 degrees, and the roll angle of water drops on the surface is below 10 degrees. The preparation method comprises the followingsteps: firstly preprocessing the surface of the composite material body; painting and flattening a resin system on the surface; spraying metallic oxide nano-powder on the surface of the resin system;and finally heating and curing, and then self-assembling in stearic acid ethanol solution or other similar solutions to obtain the composite material. The polymer-matrix composite material of the invention has the advantages of strong self-cleanness, strong anti-moisture absorption property, strong anti-freezing property, long service life, stable hydrophobic property and the like.

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 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 method for preparing a super-hydrophobic microporous membrane by synergistically regulating phase separation with an aqueous inorganic salt solution. In the casting liquid system composed of polymer / solvent / additive, weak non-solvent is beneficial to polymer crystallization, strong non-solvent is conducive to rapid gelation and the formation of large cavities, and inorganic salt grains nucleate and cause pores By using the advantages of the three agents, they play a synergistic role in the liquid phase separation process of the cast membrane, and prepare a homogeneous superhydrophobic microsphere structure membrane with good pore connectivity. The surface of the microsphere structure has a nano-scale papillae structure when the polymer is solidified, thereby forming a super-hydrophobic micro-nano structure on the surface of the membrane like a lotus leaf. The membrane body is completely composed of a microsphere structure, and the membrane pores have good connectivity. and hydrophobicity, thereby improving the stability and durability of the hydrophobic microporous membrane.

The invention discloses a method for preparing a super-hydrophobic mixed matrix membrane by inorganic particle induced phase separation. According to the method, inorganic particles having proper grain size and the surface carrying hydroxy and other hydrophilic radicals in a casting membrane solution system consisting of polymer / solvent / additive / inorganic particles are induced in the phase separating process under the interface interaction of particle surface functional groups and polymer chains and the like to form a micron-sized microsphere structure which takes the particles as a core, wherein polymer coats the surface. The polymer chain on the microsphere surface forms a nano-microspike structure in the phase separating curing process, so that a super-hydrophobic micro-structure with a lotus leaf-like surface is formed on the membrane surface, the microsphere extends to the membrane body from the membrane surface, the duct of the membrane body has excellent hydrophobicity due to the similar structure, and the hydrophobic stability and durability of the separation membrane can be promoted.

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 dropson 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 calenderingmethod; 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 hydrophobiceffect, simple preparation process, good controllability, low production cost and environmental protection.