54results about How to "Uniform surface coating" patented technology

The invention provides a preparation method for improving interfacial properties of a carbon fiber composite material. The method is characterized by comprising the steps of firstly, preparing plasma activated carbon fiber; secondly, preparing a maleic anhydride dimethylbenzene solution; thirdly, subjecting the activated carbon fiber to ultrasonic infiltration; fourthly, performing grafting of maleic anhydride; and fifthly, purifying a crude product of the plasma activated carbon fiber which the maleic anhydride is grafted to. The method has the advantages that the free radicals formed on the surface of carbon fiber are processed through plasmas of argon-oxygen mixed gas, so that the polymerization reaction speed of the free radicals and the maleic anhydride is accelerated and the degree us improved; the reaction speed is accelerated through a high temperature, and the grafting reaction time is only 3 min to 7 min, so that grafting carbon fiber which is uniform in surface coating and high in grafting rate and has certain quantities of anhydride groups is obtained, the grafting carbon fiber and epoxy resin are subjected to reaction well, and the interfacial properties of the composite material is improved; and the method is energy-saving, environment-friendly and convenient to process.

The invention discloses a powder electrostatic spraying process for metal parts. The powder electrostatic spraying process for the metal parts comprises the steps of pretreatment, electrostatic spraying and high-temperature curing. According to the process, the coating prepared by the process is uniform in surface, free of bubbling, free of pits, high in adhesion, not prone to fall off and uniform in color and luster.

The invention belongs to preparation of filling materials for high-end waterborne coatings and particularly relates to a method of modifying nano calcium carbonate powder for high-end waterborne coatings; the method comprises the steps such as preparing polymer emulsion, preparing nano calcium carbonate slurry, modifying the calcium carbonate; the problems of traditional drying process and wet process, such as high modifier usage, coating non-uniformity, high proneness of a modifier to loss with water, are solved, and the technical bottlenecks of in-situ polymerization process, such as complexity, high production cost and industrialization difficulty are broken through. The method has the advantages that the process steps are simple, the process cost is low, the period is short, the prepared product has good dispersity and coating effect and has good compatibility with base emulsion for waterborne coatings, and the main performance indexes of the product meet the corresponding international requirements.

The invention discloses a preparation method for grafting maleic anhydride onto a plasma activated carbon nano tube. The method comprises the following steps: preparing the plasma activated carbon nano tube, preparing maleic anhydride dimethylbenzene solution, carrying out ultrasonic treatment on the plasma activated carbon nano tube, and utilizing microwaves to initiate the purification of the plasma activated carbon nano tube on which the maleic anhydride is grafted. The invention utilizes the plasma activated microwave induced grafting technology to improve the compatibility of a carbon nano tube with the maleic anhydride, and obtains the modified carbon nano tube with the highest grafting ratio of 15%. The invention has the advantages of easy obtainment of raw materials, simple operation, simple and convenient apparatuses, short grafting reaction time of 20-60 min, easy control of product performance and structure.

The invention relates to a method for manufacturing magnetic polymethyl methacryate microsphere, which comprises two steps: first, preparing polymethyl methacryate microsphere; second, preparing magnetic polymethyl methacryate microsphere. Compared with existing technology of one step, the invention divides process into two steps. The first step controls particle size and purity of microsphere, while the second step embeds ferrous powder into polymethyl methacryate microsphere. The invention can get magnetic polymethyl methacryate microsphere with adaptive particle size, good monodisperse, mechanic stability and so on.

The invention relates to a technological method for performing static fluorocarbon spraying on a surface of stainless steel, and the method comprises the following steps of: (1) putting the stainless steel into an acid degreaser so as to remove greasy dirt on the surface of the stainless steel after soaking; (2) washing the greasy-dirt-removed stainless steel with water, dewatering and drying; (3) spraying a metal nanometer finishing agent on the processed surface of the stainless steel; (4) by using a wet-on-wet coating operation, performing general static fluorocarbon spraying on the processed surface of the stainless steel; and (5) obtaining a finished product after curing at a high temperature. By utilizing the technological method, decorative stainless steel materials with different colors can be manufactured; and furthermore, the adhesive force of a coating film is improved to 0 level so that actual use requirements are met.

The invention discloses a wet surface treatment process for calcium carbonate, which relates to the technical field of surface treatment for calcium carbonate. The wet surface treatment process for calcium carbonate comprises choice of material, agitation, addition of modifier and washing and drying. The steps are as follows: choice of material: the average grain size of chosen calcium carbonate is about 30nm to 70nm, and the crystal form structure is the form of calcite; agitation: the calcium carbonate powder is put into a reaction kettle, so that a calcium carbonate suspension is prepared,the temperature of the calcium carbonate suspension is kept within a range from 70 to 80 DEG C, and the agitation speed of agitating blades is controlled; addition of modifier: the temperature of thecalcium carbonate suspension and the agitation speed in step 2 are kept unchanged, the ratio of the dosage of added modifier to the dosage of the calcium carbonate is 1-4/100g, and reaction time is within a range from 20 to 30 minutes; and washing and drying: the hot slurry is filtered, the filter cake is washed to remove the unreacted modifier, and after drying, active calcium carbonate powder isobtained. The operation process of the wet surface treatment method disclosed by invention is simple, and in the process of treatment, an activator can more uniformly wrap the surface of calcium carbonate.

The invention provides a method for preparing an electrode material surface uniform modified layer based on a contact angle test, belongs to the technical field of surface modification, and relates tothe wetting property of a coating precursor liquid on an electrode material surface. The method employs the contact angle test, a suitable solvent and concentration required for surface modificationare determined by the size of the contact angle, thereby obtaining the coating precursor liquid having better wettability. The method provided by the invention can achieve uniform surface coating, thereby effectively improving the structural stability, thermal safety and cycling stability of the material. The invention has a simple operation flow, low cost and good application value.

The invention discloses a waterborne surface treating agent for PVC and PU artificial leather, and the surface treating agent is prepared from the following components: 25-60 parts of waterborne aliphatic polyurethane resin, 5-25 parts of waterborne acrylic resin, 10-35 parts of water, 5-15 parts of isopropanol, 0.1-3 parts of a poly-2-methyl-4-isothiazolin-3-one compound, 1-5 parts of a dispersant, 0.1-5 parts of a paracresol and dicyclopentadiene butyl compound, 0.1-5 parts of polyether modified polydimethyl siloxane, 0.1-5 parts of a silane coupling agent, 0.1-8 parts of propylene glycol phenyl ether, 0.1-8 parts of matting powder and 0.1-5 parts of an acrylate polymer. Correspondingly, the invention also provides a preparation method of the waterborne surface treating agent for PVC and PU artificial leather. The waterborne surface treating agent for PVC and PU artificial leather has multiple functions, integrates multiple properties of scratch resistance, wear resistance, high temperature resistance and yellow stain resistance, can achieve the operating requirements by only one-step treatment, and is simultaneously suitable for PVC and PU artificial leather.

The invention discloses a graphene shoulder and neck pain patch comprising a backing layer, a graphene film layer, a raw material medicine layer and an anti-sticking release paper layer. The raw material medicine layer is placed between the anti-sticking release paper and the backing layer; a raw material medicine is in the middle position of the raw material medicine layer and comprises the following substances: radix angelica sinensis, rhizoma gastrodiae, pilose antler, radix saposhnikoviae, notopterygium root, radix angelicae tuhuo, baked ginger, asarum sieboldii, fructus evodiae, safflower, radix dipsaci and garden balsam stem; the raw material medicine is also mixed with sodium hydroxymethylcellulose, sodium alginate and glycerol, so the raw material medicine is uniform in coating, has good adhesion and does not produce greater fluidity; the outer side of the raw material medicine is laid with the graphene film layer which can effectively activate the vitality of damaged cells andrestore normal function. The graphene shoulder and neck pain patch has the advantages of low price and convenient and quick use, and has the functions of relaxing tendons and dredging collaterals, activating blood circulation and promoting qi. The graphene film layer at the bottom layer can effectively promote the transmission of drugs, accelerates the absorption of the raw material medicine, andhas a good healing effect on shoulder and neck pain and other symptoms.

The invention relates to a method for preparing nano TiO2/wollastonite compound used for papermaking, which belongs to the technical field of inorganic synthesis. The invention discloses a new methodwhich is not reported yet, and the method successfully synthesizes a novel nano TiO2/wollastonite compound product with uniform coating, and the properties of the compound product can reach the standard. The compound product obtained by the preparation method is in a plate-like structure, and has the characteristics of high whiteness, uniform coating and good weather resistance. When the obtainedcompound product is used as a papermaking filler, the properties of the paper are similar to those of titanium dioxide as a filler. The production process of the invention is simple, and the rate forintroducing gas and the addition amount of titanium dioxide can be controlled, so that the size of the titanium dioxide particles and the coating rate of wollastonite can be adjusted, the wollastonitesurface is uniformly coated, the yield is high, the reaction condition is mild, and industrial production is easy to be realized.