42results about How to "Moderate roughness" patented technology

The invention relates to a preparation method of a transparent super-hydrophobic zinc oxide coating on a glass substrate. The preparation method comprises the following steps of a, substrate pretreatment; b, zinc oxide solution preparation; c, zinc oxide coating preparation; and d, zinc oxide coating surface modification. Compared with the prior art, the preparation method has the beneficial effects of simple equipment process, low cost and mild reaction condition and is beneficial to large-scale industrial production. The transparent super-hydrophobic zinc oxide coating prepared by using the method has excellent hydrophobicity and transparency; the contact angle is larger than 160 degrees, the rolling angle is smaller than 8 degrees, and water drops can freely roll on the coating, so that the transparent super-hydrophobic zinc oxide coating has relatively good self-cleaning performance; and the light transmittance is approach to 90% which is close to that of blank glass, so that the transparent super-hydrophobic zinc oxide coating has favorable visible light transmittance. A surface modifier used in the preparation method is an alkyl silane coupling agent instead of a fluorinated compound, so that the cost is low, the environment pollution is relatively low, and the modified coating is relatively stable.

The invention discloses a method for preparing self-cleaning antifogging coating film and belongs to the technical field of films. The method includes: subjecting a disperse system of tetrabutyl titanate to hydrothermal treatment to obtain TiO2 nano particle suspension; and dispersing SiO2 sol into the TiO2 suspension to obtain a TiO2 / SiO2 composite film by means of the dip-coating technique. The TiO2 particles are adhered and attached to the surface of a glass substrate by amorphous SiO2. Proper roughness factors are jointly provided by the TiO2 particles and continuous nano pore passages distributed in the film, and the apparent contact angle of water on the surface can be effectively decreased. The wettability of water on the surface of the film is further improved by a great quantity of OH groups carried by the amorphous SiO2, so that the super-hydrophilcity of the film can still be maintained after long-time outdoor placement.

The invention provides a preparation method of wear-resistant hydrophobic glass which is excellent in wear resistance, high in light permeability and low in preparation cost. The method includes steps of A, preparation of SiO2 / resin mixed sol; B, preprocessing of glass; C, coating of a SiO2 / resin composite membrane on the surface of glass; D, solidification; E, modification via modifier; and F, postprocessing. The preparation method has the advantages that firstly, particle size of SiO2 is controlled in a range of from 90 to 110nm by controlling PH value of prepared sol solution, so that high light transmission can be guaranteed while proper roughness can be provided for a hydrophobic membrane layer; secondly, by means of the technique that resin and SiO2 gel are mixed and directly coated, SiO2 particles are wrapped by resin, and structural strength among the SiO2 particles and between the SiO2 particles and a glass substrate can be improved greatly; and thirdly, using the once filming technique for the SiO2 / resin mixed gel is simpler in process and lower in cost than using the traditional technique for separately coating SiO2 gel and resin.

The invention relates to an acidic microetching solution used for the surface of copper or copper alloys, is characterized in that the solution contains poly-guanidine. The invention still relates to a method of treating the surface of copper or copper alloys and includes the following steps: firstly, the acidic microetching solution of the invention is used for contacting the surface of copper or copper alloys; and secondly, the surface is covered by an organic coating. Compared with the prior art, the invention has the advantages that the following requirements can be met at the same time, i.e. firstly, the copper surface is provided with a desirable roughness, which can provide enough adhesive power for the combination of the copper surface and the organic coating (a dry film for example); secondly, the treated copper surface is light-colored, friction-resistant and oxidation-resistant; thirdly, the copper surface does not need cleaning in advance, and the microetching and degreasing can be accomplished at the same time; and fourthly, the microetching amount can be as small as possible to meet the lamination requirement of the selective dry film.

The invention discloses a stoving varnish writing board and a preparing method for the stoving varnish writing board, and relates to the technical field of teaching tools. The stoving varnish writing board comprises a substrate, the upper surface of the substrate is sequentially provided with a passivation layer and a stoving varnish layer, the upper surface of the stoving varnish layer is provided with an impervious layer, the stoving varnish layer is made of stoving varnish, and the stoving varnish is formed by mixing, grinding and filtering, by mass, 30-40% of acrylic resin, 0.5-1% of dispersing agents, 1.5-3% of coloring pigments, 8-15% of anti-settling agents, 20-32% of water, 10-15% of urea, melamine and formaldehyde resin, 1-2% of catalysts, 10-18% of wear-resistant filler, 2-5% of flatting agents and 5-10% of auxiliaries. The stoving varnish writing board has the advantages that hardness is high, glossiness is low, the surface of the stoving varnish writing board is uniform, coarseness is moderate and character strokes can be prevented from permeating the writing board, chalk and fountain pens can be used for writing, vision of teachers and students can be effectively protected, the service life of the writing board is prolonged, the preparation process is good and environment protection is achieved.

The present disclosure provides a lightweight aerogel material including a polymer and clay. The lightweight aerogel material in the present disclosure may be a lightweight and strong absorbent material prepared by mixing the clay, hydrophilic polymer, and other inorganic raw materials that may be added, adding water to the mixture as a medium, stirring the mixture at a high speed to become viscous, and lyophilizing the mixture. The lightweight aerogel material prepared in this manner may have a micron-sized and nano-sized pores, which contributes to the high water absorbency and water absorption rate. When the lightweight aerogel material is used as cat litter, the water absorbency and water absorption rate of the cat litter may be much higher than the similar products. Furthermore, the density of the lightweight aerogel material in the present disclosure is controllable, which may meet the needs for different applications including the cat litter. Moreover, the lightweight aerogel material may be crushed to obtain irregular structures with rough surfaces, or may be formed into various special shapes through mold freezing.

A photosensitive grain-free printing plate, consisting of a plate base, a hydrophilic layer and a photosensitive layer, with the hydrophilic layer and the photosensitive layer being successively coated on the plate base. A hydrophilic coating is obtained by coating a composition of nano-scale and / or micron-scale particles or a composition containing nano-scale and / or micron-scale particles on the surface of the plate base. The hydrophilic coating thus obtained has an appropriate roughness, which imparts to the surface of the plate base hydrophilic and water-retaining properties. The presence of hydrophilic particles in nano scale and / or micron scale in the hydrophilic layer does not only ensure that the printing plate meets the requirements of ink absorption but also improves the abrasive resistance of the plate base surface, and furthermore maintains good cohesive forces between the hydrophilic layer and the printing base and between the hydrophilic layer and the photosensitive layer. In comparison with the existing photosensitive plates, the contamination caused by the waste acid and waste base liquids produced by electrolysis and oxidation of aluminium plates is avoided and the water and electricity consumption is reduced.

The invention discloses a heat-sensitive non-grain printing plate and a preparation method thereof. The heat-sensitive non-gritty printing plate is composed of a support body, a hydrophilic layer and a heat-sensitive layer, and the hydrophilic layer and the heat-sensitive layer are sequentially coated on the support body. In the present invention, nano-scale and / or micron-scale particles or a composition containing nano-scale and / or micron-scale particles are coated on the surface of the support to obtain a hydrophilic coating, and the prepared hydrophilic layer has a suitable roughness, so that The surface of the base is hydrophilic and water-retaining. The presence of nano-scale and / or micron-scale hydrophilic particles in the hydrophilic layer not only meets the requirements of ink absorption, but also improves the wear resistance of the surface of the plate substrate, and at the same time, the adhesion of the hydrophilic layer to the support and the heat-sensitive layer The knot strength is very good. The present invention not only improves the performance of the existing thermosensitive plate, but also avoids the environmental pollution caused by the waste acid and lye produced by the electrolysis and oxidation of the aluminum plate by the existing thermosensitive plate, and the water consumption Save 70% and save about 50% in electricity consumption.