41results about How to "Good surface modification" patented technology

The invention discloses a surface modification method for nano calcium carbonate, which is characterized by comprising the following steps of: adding inorganic alkali into nano calcium carbonate slurry, uniformly stirring, heating the slurry, adding fatty acid and performing surface modification. The method comprises the following specific steps of: adding a certain amount of nano calcium carbonate slurry into a reaction kettle, adding 0.00004 to 0.00040mol of inorganic alkali into 1g of CaCO3, and uniformly stirring; heating to the temperature of between 75.0 and 90.0 DEG C, adding 0.00005 to 0.00035mol of fatty acid or fatty acid salt into 1g of nano calcium carbonate (CaCO3) slurry, reacting, and continuously stirring for 30 to 120 minutes; and after surface modification reaction is finished, cooling, filtering, washing, drying and grinding the slurry to obtain the nano calcium carbonate subjected to surface modification. The method is simple and practicable, a modifier can form a uniform and complete coating layer on the surface of the nano calcium carbonate, and the modified product has a good application effect in polymer such as silicone sealant, polyvinyl chloride (PVC) paste resin and the like.

The invention discloses a method to produce nanometer graphite sol. It supplies a system which includes highly pure graphite as anode, inert materials as cathode and electrolytical aqueous solution. There is an impulsing power source to connect the anode and cathode. The pulse period of the power source is 0.05-0.5 second, effective voltage 2-10V (3-5V is prelatered) and effective amphere density 15-75A (25-35 is prelatered). The efficiency of this invention is higher than common direct-current electrode method. The produced nanometer graphite sol is stable and disperses so it can produce nanometer graphite powder whose diameter is under 15nm.

Disclosed is a method for preparing inorganic crystal whisker with SiO2-coated surface which comprises, subjecting the inorganic crystal whisker to decentralized processing in precursor solution, carrying out inorganic coating by employing homogeneous precipitation method, thermal insulating and ageing, filtering, scouring, and drying to obtain the inorganic crystal whisker with SiO2-coated surface.

A method for preparing the product of the soft metal difficult to machine, such as Mg-alloy or MgAl-alloy, features a vacuum sputtering method is used for modifying the surface of said product. Said Mg-alloy product has high surface quality.

Disclosed is an agent for imparting antifouling properties, which is obtained by the copolymerization of a monomer (A), a monomer (B), and a monomer (C), wherein monomer (A) is a fluorine-containing (meth) acrylate, monomer (B) is a silicone-containing (meth) acrylate, and monomer (C) is a (meth) acrylate other than the aforementioned (meth) acrylates.

The invention provides a preparation method of high temperature resistance ultrafine active calcium carbonate, and relates to the technical field of preparation and processing of calcium carbonate powder. The preparation method comprises the following steps of S1, preparing an ultrafine calcium carbonate slurry; S2, adding a dispersing agent into the ultrafine calcium carbonate slurry prepared byS1, and aging for 24-144 hours to obtain an aged slurry; S3, adding a surface treatment agent to the aged slurry prepared by S2, carrying out an auxiliary catalytic reaction by microwave or/and high pressure, after the surface treatment is finished, dehydrating the slurry by pressure filtration, drying, and pulverizing to obtain the calcium carbonate. The surface treatment agent is surface-hydrophilically-treated fatty acid, and the surface treatment agent accounts for 3-5% the mass of the dry basis of the calcium carbonate. The ultrafine active calcium carbonate can maintain the activation degree at 350 DEG C, and do not volatilize and turn yellow. The ultrafine active calcium carbonate can be widely applied to products having a processing temperature of 270 DEG C or higher such as BOPP and the like.

The invention discloses an SPS (spark plasma sintering) preparation method of a diamond-copper composite material with a high diamond volume fraction. Firstly, diamond is subjected to surface modification, and tungsten carbide is generated from tungsten and a part of carbonized diamond under the function of thermal diffusion and is attached to the surface of the diamond; next, the diamond and copper powder are mixed uniformly with a wet-grinding and mixing method; finally, sintering is carried out with an SPS technique and the diamond-copper composite material is formed. Compared with a composite material obtained through direct sintering of diamond and copper, the composite material has the characteristics of high thermal conductivity and low thermal expansion coefficient and can be usedfor a new generation of electronic packaging materials.

The invention discloses a silicate-modified PVC foamed composite decorative sheet and a manufacturing method thereof. The manufacturing method is mainly used for manufacturing a decorative sheet used in occasions such as a family, an office, a shopping mall and a meeting, and belongs to the technical field of composite materials. The silicate-modified PVC foamed composite decorative sheet mainly comprises three layers, namely a decorative layer, a foaming layer and a supporting layer, wherein the supporting layer is mainly prepared from silicate inorganic filler, polyvinyl chloride and a processing aid; the foaming layer is mainly prepared from silicate inorganic filler, polyvinyl chloride, a foaming agent and a processing aid; the decorative layer is mainly prepared from silicate inorganic filler, polyvinyl chloride, a color masterbatch and a processing aid. The decorative sheet has the advantages of being free of toxicity and odor as well as formaldehyde, being capable of preventing water, dampness, worm damage, light mass and high surface decoration property, being nailable, sawable and planeable, being capable of reducing the consumption of wood and macromolecular polymers, and being relatively high in strength and relatively long in service life.

The invention provides a real silk aluminum foil composite steel plate and a manufacturing method thereof. The composite steel plate comprises a PE (polyethylene) protection film, a PET (polyethylene glycol terephthalate) real silk film, a steel plate and a back coating layer which are arranged in sequence from top to bottom and are closely connected with one another. The manufacturing method comprises the following steps of pre-degreasing the steel plate, degreasing and washing by water, coating the back surface of the steel plate with an epoxy resin coating by rolling, solidifying and drying to form the back coating layer, coating the bottom coating layer of the steel plate with a polyurethane adhesive, solidifying to form a second adhesive layer, and compounding the second adhesive layer with a real silk aluminum foil film to obtain the real silk aluminum foil composite steel plate. Compared with a general composite steel plate, the real silk aluminum foil composite steel plate manufactured by adopting the method is better in metal luster and surface modification property, relatively low in relative cost, excellent in performance and environment-friendly in manufacturing process, and especially is very popular in consumers due to the characteristic of diversified appearances; the technical gap in the field of real silk aluminum foil composite steel plates in China is filled up.

The invention discloses a low-cost composite surface modification method for a lithium-ion battery negative electrode material, which comprises the steps of firstly crushing three raw materials such as petroleum asphalt, a modifier and a graphitization catalyst, mixing and batching, heating in stages and crushing, introducing a carbon source for graphitization, passivating to obtain graphene nanoplatelets, enabling the graphene nanoplatelets to be subjected to polyurethane oligomer modification and SBS modification to obtain composite modified graphite, finally coating the surface of natural graphene with the composite modified graphite to form a battery negative electrode material which takes the natural graphene as the core and is externally coated with the composite modified graphite. The surface modification method is low in cost, solves the defects of high cost and uneven coating and modification of the material surface of the existing negative electrode material, and can effectively improve the efficiency and uniformity of material surface modification.

The invention relates to a preparation method for a silane coupling agent modified CB/CFDSF/AG-80 epoxy resin composite material. The method mainly comprises the following steps: 1) adopting a silane coupling agent for modifying carbon black (CB); 2) performing surface cleaning and surface modification on carbon fiber double-layer spaced fiber (CFDSF); 3) preparing a modifying CB/AG-80 epoxy resin system solution for pouring and thermosetting CFDSF. The silane coupling agent modified CB/CFDSF/AG-80 epoxy resin composite material with excellent conductivity, thermodynamic property and less dosage of conductive material is prepared according to the preparation steps and the specific technical parameters of the invention; the composite material is capable of modifying the uniform distribution of carbon black in substrate; the composite material has high conductivity stability and can be widely applied to the fields, such as electronics, electrostatic protection, electromagnetic shielding and microwave absorption.

The invention discloses film-coated radiation-cured bright abrasive paper and a preparation method of the film-coated radiation-cured bright abrasive paper. The paper comprises a paper base material,an adhesive layer, an evaporation layer, a frosted layer, a film layer and a surface coating, wherein the frosted layer is prepared from a frosted coating added with organic frosted particles; the frosted coating is prepared from the following components in parts by weight: 20-70 parts of a prepolymer, 20-70 parts of an active diluent, 1.0-20.0 parts of organic frosted particles, 0-5.0 parts of aphotoinitiator and 1.0-5.0 parts of an auxiliary agent. By means of the technical scheme, the paper has bright bright crystal effect, strong visual impact effect, visual impression of frosted and gravel, smooth surface, low energy consumption, zero emission of volatile organic compounds in the technological process, and environmental protection.

The invention provides an austenitic stainless steel plate surface ultralow-temperature rolling imprinting strengthening method and device, and belongs to the technical field of special steel surface modification. The invention provides an austenitic stainless steel plate surface ultralow-temperature rolling impressing strengthening method and device aiming at the defects that when an austenitic stainless steel plate is in service, the surface hardness is low, scratching is prone to occurring, and attractiveness is affected. Firstly, a stainless steel plate is placed on a supporting plate in a cooling tank to be positioned, the positioned stainless steel plate and a corrugated roller are soaked and cooled at the same time through an ultralow-temperature medium filled in the cooling tank, and the temperature of the stainless steel plate is kept at the liquid nitrogen temperature. The cooled corrugated roller is driven by the servo hydraulic system to conduct rolling coining on the upper surface and the lower surface of the stainless steel plate in the liquid nitrogen environment, so that the surface strength and hardness of the stainless steel plate are remarkably improved. The austenitic stainless steel plate surface ultralow-temperature rolling imprinting strengthening method and device have the advantages of being rapid, efficient, environmentally friendly, remarkable in process integration level and strengthening effect and the like.

The invention discloses a method for preparing a novel packaging material with a frosted effect. The method comprises the following steps of designing a pattern with the frosted effect, selecting an optical effect according to the pattern with the frosted effect, quantifying the optical effect, simulating the optical effect to determine the frosted effect and image units, assembling the image units, then photoengraving to prepare a mother set, and finally copying frosted information on the mother set to a substrate to obtain the novel packaging material with the frosted effect. The problems that a frosted or matte effect layer of the existing frosted material in the background art is uneven in surface, and is dim and dark and poor in metal texture visually, small in visual impact, and lowin gloss are solved, so that the novel packaging material with the frosted effect has a relatively strong metal texture, a relatively strong three-dimensional sense, a large visual impact, and high anti-counterfeiting performance, and is rich in variety, and high in selectivity.