35results about How to "Increased micro-roughness" patented technology

The invention provides a method for preparing a super hydrophobic film on the surface of a zinc substrate, which belongs to the technical field of a functional material. The method comprises the following steps of: ultrasonically washing a zinc sheet substrate, blow-drying by nitrogen gas, oxidizing by formamide water solution, and forming a rod-like nanometer zinc oxide array on the surface of a zinc sheet; and modifying by low surface energy substances, namely, stearic acid, 12-hydroxystearic acid and normal dodecyl mercaptan, and forming the super hydrophobic film with high static contact angle and low roll angle on the surface of the zinc sheet substrate. The super hydrophobic film may not be changed after being placed in the air for long time due to better stability and can be used for preventing water, resisting frost, preventing snow and resisting metal corrosion due to better acid and alkali resistance.

The present invention discloses a preparation method for electrodeposition of a hydroxyapatite coating on the surface of titanium or a titanium alloy. The method comprises: adopting a pretreated titanium substrate or a pretreated titanium alloy substrate as a cathode, adopting a platinum-plated titanium mesh as an anode, heating an electroplating solution to a constant temperature of 40-80 DEG C, and adopting a constant current manner or a constant potential manner under a magnetic stirring condition to carry out electrodeposition, wherein a current density is 1.0-50.0 mA.cm<-2>, a deposition potential is 1.0-10.0 V, the electroplating solution comprises 20.2-80.0 mmol.L<-1> of Ca<2+> and 10.0-50.0 mmol.L<-1> of H2PO4<->, a Ca/P molar ratio is 1.6-2.0, a supporting electrolyte concentration is 0.1-1.0 mol.L<-1>, and the pH value is 4.2-5.0. According to the present invention, the hydroxyapatite coating prepared through electrodeposition by using the constant current manner or the constant potential manner has characteristics of fine crystal, smooth surface, strong bonding force with the substrate, good biological activity and mechanical property. The preparation method for the titanium base hydroxyapatite composite material has characteristics of mild reaction condition, avoidance of influence on material biological activity by a high temperature treatment, simple process, and low equipment investment, wherein a series of problems caused by expensive equipment and complex operation of the existing method are overcome with the preparation method.

The invention provides hydrophilic oleophobic sponge as well as a preparation method and application thereof, and belongs to the technical field of preparation of functional materials. The preparationmethod comprises the following steps: mixing a nanoparticle suspension with a modifier solution to obtain a modification solution, wherein the nanoparticle suspension comprises a nano ferroferric oxide suspension with the surface coated with silicon dioxide and/or an ethanol suspension of nano silicon dioxide, and the modifier solution is a chitosan acetic acid aqueous solution and a polyvinyl alcohol aqueous solution; immersing sponge in the modification solution, mixing the sponge with a glutaraldehyde aqueous solution for a cross-linking reaction to obtain the hydrophilic oleophobic sponge. Therefore, the sponge has good oil-water separation performance, and a heavier water layer can be effectively separated from an oil-water mixture of light oil such as lubricating oil, engine oil, pump oil, crude oil, gasoline and sunflower seed oil simply through gravity driving. The prepared hydrophilic oleophobic sponge has a good application prospect in oil-water separation.

The invention discloses a preparation method of a phosphatized polyaniline-silicon dioxide graft modified graphene/waterborne epoxy-group-containing silicon resin composite coating, relates to a preparation method of a silicon resin composite anticorrosive coating, and aims to solve the problems of poor dispersibility of modified graphene and polyaniline in polymer resin, complex process and environmental pollution during preparation of the existing composite coating. The method comprises the following steps: anchoring silicon dioxide on the surface of graphene oxide through a covalent bond to prepare a graphene oxide-silicon dioxide composite material, preparing a phosphatized polyaniline-silicon dioxide grafted modified graphene composite material by adopting phytic acid as a modifier, and compounding and curing the phosphatized polyaniline-silicon dioxide grafted modified graphene composite material with epoxy group-containing water-based silicon resin. According to the invention, the dispersibility of graphene and polyaniline is improved, the hydrophobicity of the composite coating is improved, the synergistic effect of graphene and polyaniline is more obvious, and the corrosion resistance of the water-based coating is improved. The preparation method is suitable for preparing the silicon resin composite anticorrosive coating.

The invention relates to environment-friendly type multifunctional nano modified coating and a spraying method thereof, which are used for solving the problems that the existing coating is high in cost and not resistant to ageing. The environment-friendly type multifunctional nano modified coating is prepared from the following components in parts by weight: 50-200 parts of nano titanium dioxide particle slurry, 30-100 parts of an acrylic resin finishing agent, 5-30 parts of a dispersing agent, 10-50 parts of a thickening agent, 5-10 parts of a de-foaming agent and an appropriate amount of water, wherein the nano titanium dioxide particles in the nano titanium dioxide particle slurry are surface-modified anatase titanium dioxide particles with a photocatalysis function and particle diameters of 10nm-50nm. Airflow atomized spraying of the compressed air is as follows: atomizing a paint liquid into mists by virtue of air flow of the compressed air, spraying the mists to the surface of an object, and forming a thin and uniform paint film on the surface of the sprayed object. Such special functions as super-hydrophobicity, ultraviolet ray resistance, bacteria resistance, self-cleaning, air purifying and the like are achieved without affecting the original color and patterns of the substrate, the functionality and the stability of the special functions are still relatively strong after long-term illuminating or multi-time washing, the cost is low, and the ageing resistance is excellent.

The invention relates to a novel preparation process for a thermal barrier coating. The novel preparation process comprises the following steps: generating a metal bonding bottom layer on the surfaceof a matrix; generating an in-situ thermal growth oxide layer (TGO); and generating a ceramic heat-insulating surface layer, wherein the TGO layer is pre-grown before the matrix serves. The TGO layercomprises alpha-aluminum oxide. A compact and continuous TGO layer which takes alpha-aluminum oxide as the principal component is preset through large-particle dry ice jetting and purifying rougheningtreatment and pre-vacuum argon gas oxidizing treatment. An oxide film has very good high-temperature oxidization resistance, prevents quick oxidization, reduces a layer thickness increase rate of theTGO layer, and achieves the purpose of reducing thermal barrier coating peel-off probability.

The invention relates to the technical field of hydrophilic glass and in particular relates to a super-hydrophilic agent. The super-hydrophilic agent is characterized by being composed of the following components in percentage by weight: 0.1-0.45% of ZnO nanorod, 1.5-5% of carbon nano tube powder, 12-18% of N,N-dimethylformamide and the balance of dispersion, wherein the carbon nano tube powder is single-walled or multi-walled carbon nano tube powder; and the carbon nano tubes are attached to the surface of the ZnO nanorod. The invention further provides a preparation method of the super-hydrophilic agent and super-hydrophilic window glass provided with a super-hydrophilic coating. The super-hydrophilic agent disclosed by the invention has the advantages that the super-hydrophilic agent is high in visible light transmittance and capable of absorbing infrared and ultraviolet radiation and has excellent super-hydrophilic characteristics under non-illumination conditions.

The invention discloses a crease resisting anti-shrinkage finishing technique for a sweater fabric. The technique comprises the follow steps that: the sweater plug material is subjected to plasma pretreating, glutamine transaminase is adopted to process the sweater plug material pretreated by plasma, and finally, the sweater plug material is washed by water and dried naturally. The technique realizes the crease resisting anti-shrinkage finishing on the sweater plug material by the plasma together with the glutamine transaminase, remarkably improves the crease resisting anti-shrinkage property of the sweater plug material, has the advantage of health and environment protection, and improves the performances of the sweater plug material of rupture intensity, rupture extending rate and core absorbing height and the like.

The invention relates to the technical field of hydrophilic glass, and particularly relates to a super-hydrophilic agent. The super-hydrophilic agent is characterize by comprising the following components: 0.08-0.33wt% of tin dioxide nano particles, 2-5wt% of carbon nano tube powder, 0.2-0.8wt% of polyvinyl alcohol, and the balance of a dispersion liquid; and the carbon nano tube powder is a powdery single-walled carbon nano tube or multi-walled carbon nano tube, and the tin dioxide nano particles adhere to the surface of the carbon nano tube. The invention also provides a preparation method for the super-hydrophilic agent and super-hydrophilic vehicle window glass which is provided with a super-hydrophilic coating formed by the super-hydrophilic agent. The super-hydrophilic agent has the advantages of being high in visible light transmittance, being capable of absorbing infrared radiation, and having good super-hydrophilic characteristics under non-illumination conditions.

The invention provides mulberry silk blended quick-drying fabric and a preparation method thereof. Mulberry silk, wool fibers and water-soluble vinylon fibers are blended and spun into first yarns, aninner surface layer and an outer surface layer are formed by weaving on a machine, cotton fibers and bamboo fibers are blended and spun into second yarns, and an intermediate layer is formed by weaving on the machine, so that a fabric blank is obtained, ultrasonic heating finishing is carried out by using finishing liquid, the fabric blank is bailed out and then is soaked in clear water for 5-10minutes, and drying is carried out, so that the mulberry silk blended quick-drying fabric is obtained; and the finishing liquid is prepared by mixing and stirring trehalose, polyethylene glycol 400, borax and water uniformly. According to the mulberry silk blended quick-drying fabric and the preparation method thereof, the mulberry silk, the wool fibers, the water-soluble vinylon fibers, the cotton fibers and the bamboo fibers are blended and processed into the quick-drying fabric, so that the using amount of the mulberry silk is greatly reduced, the production cost is reduced, the blending uniformity among the different fibers is good, and the good quick-drying performance is ensured.

The invention relates to the technical field of PCBs, and provides micro-foaming hole plugging resin for a PCB as well as a preparation method and application of the micro-foaming hole plugging resin. The micro-foaming hole plugging resin for PCB comprises the following components by weight: on the basis that the total weight of the micro-foaming hole plugging resin is 100%, 20%-40% of epoxy resin, 2%-10% of a curing agent, 40%-60% of an inorganic filler, 0.1-10% of a foaming agent and 0.1-5% of an auxiliary agent. The micro-foaming hole plugging resin for the PCB can form a micro-bubble structure, so a volume shrinkage rate and shrinkage stress generated during curing of the resin are effectively reduced; meanwhile, the original physical characteristic CTE and glass-transition temperature of a material are guaranteed, resin shrinkage is resisted in the using process, curing stress is reduced, and a crack generation proportion is reduced; and meanwhile, the dielectric constant, dielectric loss and other properties are reduced, and wide application in the field of high-frequency high-speed PCBs is facilitated.

The invention discloses a double-color electroplating process which comprises the following steps of ultrasonic oil removal, hydrophilization, coarsening, neutralization, acid presoaking, palladium activation, alkaline peptization, acidolysis peptization and chemical nickel plating. In the coarsening step, a mixed coarsening solution is adopted, and the mixed coarsening solution comprises ferrous sulfate heptahydrate, chromic anhydride and H2SO4, and the concentration ratio of the ferrous sulfate heptahydrate to the chromic anhydride to the H2SO4 is 1:(190-210):(190-210). Compared with the prior art, the ferrous sulfate heptahydrate, the chromic anhydride and the H2SO4 are matched to improve the microscopic roughness of the surface of a workpiece to be electroplated, so that the surface of the workpiece to be electroplated has sufficient adhesion capacity. According to the double-color electroplating process, alkali hydrolysis glue is firstly adopted, and then the acidolysis glue is adopted to carry out peptizing treatment on the workpiece to be electroplated, so that a divalent tin ion peptizing layer around colloid palladium of the workpiece to be electroplated is completely removed, metal palladium particles with activity are exposed, and therefore a conductive layer formed in the chemical nickel plating step and a metal palladium layer have a good bonding effect.