148results about How to "Guaranteed hydrophobicity" patented technology

An electroless plating layer with strong adhesion is optionally formed only on a portion to be a circuit, and other non-circuit portions are not roughened. A laser beam (2) with a wavelength of 405-1064nm is optionally irradiated onto the portion to be a circuit (11) of a synthetic resin substrate (1), and an ionic catalyst of palladium is caused to be adsorbed and then reduced to metallic palladium by a reducing agent. Subsequently, an electroless plating layer (3) is formed on the portion to be a circuit (11). Since the portion to be a circuit (11) is surface modified and roughened, the ionic catalyst firmly attaches, and the electroless plating layer (3) strongly adheres. The ionic catalyst does not adsorb onto the non-circuit portions (12) not irradiated by the laser beam (2), and thus the electroless plating layer (3) is not formed thereon.

The invention relates to a hydrophobic silica aerogel heat-insulation composite material. The composite material consists of silica aerogel and an inorganic fiber product, wherein the silica aerogel is doped with a flame retardant and an infrared blocking agent; the inorganic fiber product comprises one or more of glass fibers, quartz glass fibers, aluminium silicate fibers, ceramic fibers, alumina fibers, zirconia fibers, rock wool fibers and basalt fibers, and the porosity of the inorganic fiber product is higher than 50%. The composite material has the overall waterproof performance, the extremely low heat conductivity coefficient and the excellent high-temperature heat-insulation performance, can pass an incombustibility test under the condition that the material is ensured to be hydrophobic as a whole, and reaches level A1 according to the incombustibility test; the preparation process is simple, the production cycle is short, the cost is lower, the equipment requirement is low, and reaction conditions are controllable.

The invention relates to a preparation method of an organic/inorganic hybridization nano super-hydrophobic fiber film. The method comprises the steps of dissolving a polymer carrier in water, and heating and stirring to obtain a polymer carrier solution; mixing tetraethoxysilane, water, zinc acetate and phosphoric acid, and stirring at the room temperature to obtain a mixing solution; uniformly mixing the mixed solution and the polymer carrier solution, then performing electrostatic spinning, drying in vacuum, forging, cooling and dipping in HCl solution, and drying to obtain a SiO2 porous nano fiber film; compositing and laminating the SiO2 porous nano fiber film, pouring a liquid, and drying in vacuum to obtain the organic/inorganic hybridization nano super-hydrophobic fiber film. The super-hydrophobic nano inorganic fibers have superhigh hydrophobic performance which can be maintained under the conditions of humidity, low temperature and the like without the FAS processing, is smooth and soft in hand feeling, gets rid of the limitation of the economic cost of an organic fluorocarbon and APEO and the environment-friendly limitation, and has the advantages of low price, no pollution, wide applicable range and the like.

The invention discloses a method for preparing multifunctional nanometer protection coating through circulation small-power continuous discharge, and belongs to the technical field of multifunctional nanometer protection coating through circulation small-power continuous discharge. The method comprises the steps that a reaction cavity is vacuumized, inert gas is introduced into the reaction cavity, a base material moves in the reaction cavity, monomer steam is introduced into the reaction cavity, chemical vapor deposition is carried out and comprises a pretreatment stage and a film coating stage, the plasma discharge mode is large-power continuous discharge in the pretreatment stage, the plasma discharge mode is small-power continuous discharge in the film coating stage, the pretreatment stage and the film coating stage are cycle and repeated at least one time, more active sites more introduced to the surface of the base material in a circulation mode in the film coating technological process, effective film coating is added, the film structure is more compact, the nanometer coating with of the multi-layer composite structure is obtained, multiple layers of protection are provided for the product, the more compact coating structure is shown microscopically, and excellent hydrophobicity, adhesive force, acid and base resistance, mechanical performance and moisture and heat resistance are shown macroscopically.

The invention discloses a thermal insulation silicon dioxide aerogel/hydroxylation glass fiber felt composite and a preparation method thereof. The thermal insulation silicon dioxide aerogel/hydroxylation glass fiber felt composite is characterized in that silicon dioxide aerogel accounts for 50-80 weight parts of a matrix, and hydroxylation glass fiber felt accounts for 70-120 weight parts of a reinforcing body. The thermal insulation silicon dioxide aerogel/hydroxylation glass fiber felt composite is prepared by preparing a silica sol system of an MQ structure (M represents (CH3)3SiO1/2, Q represents SiO4/2) through raw materials including absolute ethyl alcohol, deionized water, hexamethyldisiloxane and the like under the acid catalysis environment, then adding gel catalysts, submerging preprocessed glass fiber in the silica sol system to form a wet gel and fiber felt composite, conducting soaking through normal hexane after ageing is conducted for 12-24 h so that water in the system can be removed, and conducting drying to obtain the silicon dioxide aerogel/hydroxylation glass fiber felt composite at temperature of 50-120 DEG C and pressure of 0.01-5 Pa for 1-5 h.

The invention discloses a synthesis method of a magnetic nano high-molecular polymer. The polymer is polystyrene coated ferriferrous oxide nanoparticle, which is prepared through a chemical co-precipitation method. In the synthesis of ferriferrous oxide nanoparticle, trisodium citrate is taken as the modifier to improve the dispersibility of ferriferrous oxide in a water solution; at the same time, polystyrene can better cover the surface of ferriferrous oxide nanoparticles, the specific surface of the nanoparticle is large, at the same time, the hydrophobicity of polystyrene is large, and the polystyrene that is covered on the surface of ferriferrous oxide nanoparticle has good affinity on oil. The synthesized nanoparticle is super-paramagnetic, has a large specific surface and strong hydrophobicity, and thus can be used to process oil-containing wastewater. The wastewater treatment has the characteristics of short separation time, simple operation, high oil elimination rate, and environment-friendliness.

The invention relates to a method for making fabric having moisture absorbing and sweating property, which includes: pre-activating on the surface of the hydrophobic fabric; then taking grafting reactions with polyalcohol, natural polysaccharide and copolymer formed by unsaturated carboxylic acid with double bond and a covalent bond is formed.

The invention discloses a preparation method of a cellulose hydrophobic material. The cellulose hydrophobic material is prepared by reacting cellulose and epoxidized vegetable oil. Compared with the prior art, the method has the advantages of wide sources and low price of the vegetable oil raw material; the prepared cellulose hydrophobic material has nanoparticle structures on the surface and has high surface roughness and favorable hydrophobicity, the contact angle reaches 137-155 degrees; the nanoparticles formed by the cellulose surface fibers enhance the roughness; and after the material is immersed in water for 48 hours, the saturation water absorptivity is 6-17 wt%, and the material can still keep the hydrophobicity.

The invention belongs to the technical field of nanometer magnetic materials, and discloses a core-double shell hydrophobic magnetic microsphere. The magnetic microsphere uses a magnetic material as an inner core, uses a corrosion-resistant layer as an inner shell layer and uses a hydrophobic carbon layer as an outer shell layer, wherein the magnetic material is ferroferric oxide, gamma-Fe2O3 or cobaltosic oxide; the corrosion-resistant layer is silicon dioxide, titanium dioxide or aluminum oxide. The invention further discloses a preparation method of the magnetic microsphere. The hydrophobicmagnetic nanometer microsphere has the advantages of strong acid resistance, hydrophobicity and magnetic recyclability, can effectively drive migration and collection of oil beads or organic pollutant molecules in a strong acid solution and in a complex water system environment, and can achieve oil-water separation; the magnetic microsphere is high in reuse rate, and the hydrophobic property thereof is maintained after high-pressure extrusion.

The invention relates to a super-wear-resistant and super-amphiphobic coating as well as a preparation method and application thereof, belonging to the technical field of coating preparation. The preparation process comprises the following steps: mixing resin powder, hydrophobic powder and an auxiliary agent, then putting the obtained mixture into a twin-screw mixer for melting and extruding, and then tabletting and crushing; grinding the crushed the sheets, and sieving to obtain a powder coating; dispersing aqueous silica sol into an aqueous solution, adding ammonia water for carrying out alkalization treatment, then adding the solution into an ethanol solution, mixing uniformly and then adding a hydrophobic modifier, stirring and standing to obtain a nano-super-amphiphobic coating; electrostatically spraying the powder coating to obtain a primer coating, and then spraying the nano-super-amphiphobic coating onto the surface of the primer coating to obtain the super-wear-resistant and super-amphiphobic coating. According to the preparation method provided by the invention, a large roughness surface structure is prepared by means of an electrostatic powder spraying process; due to the introduction of the functional finish coating, the super-amphiphobic coating with ultra-high wear resistance and anti-icing performance can be obtained; the super-wear-resistant and super-amphiphobic coating can be applied to preparation of kitchen utensils and equipment, inner walls of refrigeration equipment or outer walls of outdoor facilities in cold areas.

The invention belongs to the field of functional micro-nano fiber composites, and particularly relates to an anti-ultravoilet unidirectional-moisture-permeable fiber composite and a preparing method thereof. The fiber composite comprises a polypropylene layer and a hydrophilic polymer and ultraviolet absorber mixture layer which are integrally combined. Polydopamine deposits on and adheres to thesurfaces and the interiors of the polypropylene layer and the hydrophilic polymer and ultraviolet absorber mixture layer. The preparing method includes the steps of dissolving an ultraviolet absorberand a hydrophilic polymer in an organic solvent to form a spinning solution, conducting static spinning and then hot-pressing treatment with a melt static spinning polypropylene fiber material as thereceiving substrate, and placing the material in a Tris-HCl buffer solution with dissolved dopamine for impregnation modification to prepare the anti-ultravoilet unidirectional-moisture-permeable fiber composite. The material has good unidirectional moisture-permeable and anti-ultraviolet functions and is stable in integration structure, simple in composition and structure, simple in preparing process and wide in application prospect.

The invention provides an acrylate emulsion for building interior wall paint and a preparation method thereof, and paint, and belongs to the technical field of building paint. The emulsion is preparedfrom the following raw materials, by weight: 6-20 parts of butyl acrylate, 15.5-26 parts of styrene, 6-20 parts of 2-ethylhexyl acrylate, 0.11-0.55 part of a self-crosslinking monomer, 0.15-1.3 partsof acrylamide, 0.2-3 parts of a carboxyl monomer, 0.015-0.12 part of a silane coupling agent, 0.21-0.81 part of a reactive anionic emulsifier, 0.21-0.81 part of a reactive non-ionic emulsifier, 0.1-2parts of polyethyleneimine, 0.1-0.2 part of adipic dihydrazide, 0.12-0.45 part of persulfate, 0.2-2 parts of ammonia water, and 30-60 parts of water. The emulsion is mainly used for building interiorwall paint; the emulsion can have low MFFT without adding a film forming auxiliary; and the paint prepared by the emulsion can have excellent scrubbing resistance and freeze-thaw stability, and is low in VOC content and excellent in environmental protection.

The invention discloses a flat heat pipe with a gradient wetting structure. The flat heat pipe comprises a bottom plate, a top plate and supporting plates located between the bottom plate and the topplate. The bottom plate, the top plate and the supporting plates on both sides are connected to form a sealed cavity. A micron-grade radial strip is machined on the inner surface of the bottom plate,and the wetting gradient which is evenly changed from the circle center to the circumference is presented. Super-hydrophilic super-hydrophobic radial structures arranged at intervals are machined on the inner surface of the top plate and used for transporting condensate to the surrounding pipe wall direction. Liquid absorbing cores are arranged on the inner sides of the supporting plates. Since micro-nano machining is carried out on the evaporation surface, the functions of transporting liquid directionally without pump and concentrating the reflux condensate are achieved. Patterning super-hydrophilic super-hydrophobic machining is carried out on the condensation surface, condensate is driven to migrate to the surrounding pipe wall direction, the condensate backflow speed is increased, liquid absorption core structures on the upper and lower surfaces are omitted, heat resistance is reduced, the evaporation and condensation speed is improved, heat exchange performance of an evaporationarea and a condensation area is improved, and therefore the heat exchange performance of a whole flat heat pipe is improved.

The invention discloses a method for preparing a multifunctional nanometer protective coating through high-duty-cycle pulse discharge, and belongs to the technical field of plasmas. In the method, the interior of a reaction chamber is vacuumized until a vacuum degree is 10-200 millitorrs, inert gas He or Ar is charged, a movement mechanism is started to enable a base material to move in the reaction chamber, monomer steam is charged into the reaction chamber, plasma discharge is carried out, chemical vapor deposition is carried out, a deposition process comprises a pretreatment phase and a film-coating phase, a plasma discharge manner in the pretreatment phase is high-power continuous discharge, and a plasma discharge manner in the film-coating phase is the high-duty-cycle pulse discharge. During a preparation process for the coating, the movement characteristic of the base material and the high-duty-cycle pulse discharge energy of plasmas form combined linkage. The base material moves during the plasma discharge, so that the deposition efficiency of the coating is increased, and the thickness uniformity and compactness of the coating are improved. The prepared coating has the characteristics of being waterproof and moistureproof, mouldproof, resistant to acidic and basic solvents, resistant to acidic and basic salt mist, and the like.

The invention discloses an inflaming-retarding tear-resisting fireproof cable material.The inflaming-retarding tear-resisting fireproof cable material is prepared from, by weight, 30-50 parts of neoprene, 20-35 parts of polyvinyl chloride, 5-15 parts of ethylene propylene diene monomer, 0.5-1.5 parts of peroxysuccinic acid, 0.5-1 part of tert-butyl hydrogen phthalate, 0.2-0.8 part of tetramethylthiuram disulfide, 0.4-1.2 parts of 1,3(1,4)-bis(tert-butyldioxyisopropyl)benzene, 40-60 parts of fast extruding furnace black, 20-30 parts of ceramic fiber, 5-15 parts of hard pottery clay, 5-15 parts of modified activated carbon, 1-3 parts of antiager, 0.4-0.8 part of polyvinyl butyral, 1-2 parts of stearic acid, 1-2 parts of polyethylene wax and 0.5-1.5 parts of epoxidized soybean oil.The inflaming-retarding tear-resisting fireproof cable material has good inflaming-retarding property and excellent waterproof performance and tear-resisting performance.

The invention provides a water-in-water colorful coating and a preparation method thereof. The coating comprises a colloidal solution, a disperse phase and a continuous phase, the colloidal solution is formed by dissolving sodium pyrophosphate and magnesium lithium silicate in water, the disperse phase is mainly composed of a hydrophobic regulator, a wetting dispersant, cellulose, a pigment, the colloidal solution, an emulsion and water, and the continuous phase is mainly composed of the hydrophobic regulator, a film forming agent, an antifoaming agent, propylene glycol, a thickener, the emulsion and water, wherein the hydrophobic regulator is a divinyl benzene and 1-vinyl imidazole copolymer and/or a divinyl benzene and vinyl ionic liquid copolymer. The coating needs no organic solvents, and the waterproof property of the coating is increased through the hydrophobic regulator, so the colorful coating has the advantages of good waterproof property, bleeding resistance, stability, automatic cleaning and pollution prevention.

The invention discloses a nano fiber coating layer super-hydrophobic self-cleaning air filter core and a manufacturing method thereof. The nano fiber coating layer super-hydrophobic self-cleaning air filter core comprises a micron filter core material substrate and a nano hydrophobic fiber non-woven thin film; the nano hydrophobic fiber non-woven thin film is formed by electrospinning a hydrophobic material; the micron filter core material substrate is formed through small molecule atmosphere fumigation of a chemically grafted hydrophobic material. The filter core with a double-layer material structure provides a super-hydrophobic and low-adhesion surface of a micro-nano structure, also ensures hydrophobicity of a lower-layer substrate paper fiber material, thereby achieving the super-hydrophobic surface properties with practical strength and durability on the paper fiber material substrate, ensuring good air permeability, and achieving high-efficiency self-cleaning and reuse of the filter core of air purification equipment.

The invention discloses a silica aerogel and a normal pressure drying preparation method and application thereof. The method comprises the following steps: 1) mixing a silicon source, water and an acid catalyst for a reaction, so as to obtain a sol; 2) dissolving an organic amine in a water-insoluble low-surface-tension solvent to obtain an alkaline organic solution; 3) mixing the sol with the alkaline organic solution under stirring, adding a phase transfer catalyst simultaneously during the mixing under stirring, so as to obtain an unstable emulsion; 4) allowing the unstable emulsion to stand for gelation and aging, so as to obtain a wet gel; and 5) performing atmospheric drying on the wet gel, so as to obtain a silica aerogel having a light weight, a large specific surface area and a low thermal conductivity. The method has the advantages of short process flow, high production efficiency and low cost, and the obtained silica aerogel has excellent comprehensive performance and can bewidely used as a thermal-insulating material, a sound absorbing material, an adsorbing material or an explosion-proof material.

The invention discloses an erosion-resisting hydrophobic material and a preparation method of the material. According to the preparation method of the erosion-resisting hydrophobic material, a magnetic filtering negative electrode vacuum arc discharging method is adopted to enable a plurality of film layers to be deposited on the surface of a workpiece; and a laser device laser etching method is adopted to etch texture on the surface of the workpiece after film layer deposition, wherein the film layer deposition step is carried out before the texture etching step. The prepared multi-layer film of specific structure has the excellent wear-resisting impact-resisting performance, and the service life of engineering structural parts under the contact abrasion and impact environment can be obviously prolonged; due to instruction of a film layer system, the hardness of a base body is improved, the shaping and deformation resistance capacity of the base body is improved, and erosion-resisting and abrasion-resisting performance of the base body is further improved; and due to instruction of a microstructure, the capacity of oil/grease storage and wear particle containing can be effectively improved, and on the premise that the hydrophobic property is ensured, the service life of the film layer is further improved.