85results about How to "Reduce embedding" patented technology

A method is given for treating a wellbore in a subterranean formation by hydraulic fracturing, slickwater fracturing, gravel packing, and the like, by using plate-like materials as some or all of the proppant or gravel. The plate-like materials are particularly useful in complex fracture systems, for example in shales. They may be used as from about 20 to about 100% of the proppant. Relative to conventional proppants, plate-like proppants demonstrate (a) enhanced crush resistance of the proppant due to better stress distribution among proppant particles, (b) diminished proppant embedment into formation fracture faces due to the greater contact surface area of proppant particles with the formation, (c) better proppant transport due to lower proppant settling rates, (d) deeper penetration into branched and fine fracture networks, and (e) enhanced proppant flowback control. Preferred plate-like proppants are layered rocks and minerals; most preferred is mica.

The invention relates to a preparation method for making lithium ion battery cathode materials of LiFePO4/C by using the reducing agent and inorganic salts of iron source, phosphorus source, lithium source, carbon source and so on as raw materials. Adopt the combining method of sol-gel and microwave treatment and prepare ultrafine particles of LiFePO4 and carbon coat the particles at the same time. On this basis, change the property of LiFePO4/C by metal doping of Cr3 plus , Co3 plus . By processing with industrial microwave oven of high power, the invention shortens processing time greatly, increases the yield remarkably, reduces material cost and energy loss, simplifies the processes, improves the efficiency of industrial production of lithium ion battery and is convenient for implementation in industry. Take it as cathode materials of lithium ion battery with high-rate discharge. The invention raises conductivity of lithium iron phosphate and at the same time improves charge discharge capacity and cycle numbers by carbon coating and metal element doping.

The invention provides a foam dressing containing a composite silver-zinc antibacterial material and a preparation method of the foam dressing. The foam dressing containing the composite silver-zinc antibacterial material comprises polyurethane foaming plastic and the composite silver-zinc antibacterial material, wherein the composite silver-zinc antibacterial material is adhered to the inside of the polyurethane foaming plastic, comprises the following raw materials in content: nano silver, nano zinc and a nano inorganic carrier; and the composite silver-zinc antibacterial material contains the following raw materials in percentage by mass: 10%-20% of silver and 20%-40% of zinc. The composite silver-zinc antibacterial material is dispersed into the foam dressing in a manner of foam molding or ultrasonic dipping together with foam. The foam dressing containing the composite silver-zinc antibacterial material is capable of effectively absorbing diffusate of the wound surface, and effectively inhibiting growth and breeding of staphylococcus aureus, pseudomonas aeruginosa and candida albicans.

The invention provides a ternary positive electrode active material of a lithium ion battery and a preparation method thereof, a positive electrode material, a lithium ion battery and a product thereof, which relate to the technical field of ternary materials. The ternary cathode active material of a lithium ion battery comprises a nickel-cobalt-manganese cathode material, a nanometer tin dioxideand graphene oxide, wherein the nanometer tin dioxide is coated on the surface of the nickel-cobalt-manganese cathode material, and the nickel-cobalt-manganese cathode material coated with the nanometer tin dioxide on the surface is embedded in the graphene oxide laminated structure; the ternary cathode active material of the lithium ion battery alleviates the technical problems of poor rate performance and poor cycle performance of a traditional cathode active material. The invention also provides a preparation method of the abovementioned cathode active material, a cathode material, a lithium ion battery and a product thereof.

The invention discloses an application of taking oligopeptide and derivatives thereof as a template molecule, and an imprinting technology based preparation method of an angiotensin synthetic receptor. The template molecule comprises any section of a peptide bond at a nitrogen end or a carbon end of an angiotensin II, and derivatives thereof, or any section of the peptide bond at the nitrogen end or the carbon end of an angiotensin I and the derivatives thereof. The application takes the template molecule as an imprint to prepare the angiotensin synthetic receptor; the angiotensin acceptor is prepared in a way that the template molecule, a function monomer, a cross-linking agent, a surface-active agent and the like are mixed according to a certain rate, and then an initiator is added. The acceptor is good in biocompatibility, can high selectively capture and neutralize the angiotensin II and the angiotensin I, and cuts off functions of the angiotensin II and the angiotensin acceptor (AT1) as well as functions of the angiotensin I and angiotensin converzyme (ACE), so as to control the blood pressure. The acceptor can be applied to separation, concentration and measuring of the angiotensin I or II.

The invention discloses a terminal application protecting method. The method comprises the steps that the application attributes of a terminal application are encrypted; the main logic of the terminal application is achieved through a programming language, and a decryption algorithm is packaged; when an instruction for starting the terminal application is received, the encrypted application attributes are called, the encrypted application attributes are decrypted, the decrypted application attributes are checked, and after the application attributes pass the check, the main logic of the terminal application is called. The invention further discloses a terminal application protecting device. According to the scheme, the terminal application can be effectively prevented from being tampered, and malicious advertisement embedment is reduced.

The invention discloses a deep shale gas spiral type variable-parameter fracturing method. The deep shale gas spiral type variable-parameter fracturing method comprises the following steps: (1) evaluating a pre-fracturing formation; (2) determining the position of a section shower hole and carrying out perforating operation; (3) determining a fracturing fluid system and a proppant; (4) optimizingfracture parameters and fracturing construction parameters; (5) carrying out acid pretreatment; (6) fracturing and injecting low viscosity quick water in a first stage; (7) fracturing and injecting medium viscosity quick water in the first stage; (8) fracturing and injecting a glue solution in the first stage; (9) after the pumping in the first stage is finished, stopping pumping for 5-10 min; and(10) carrying out fracturing and pumping in a second stage; and (11) carrying out displacing operation. The deep shale gas spiral type variable-parameter fracturing method disclosed by the inventionhas the advantages that the fullness of a small and micro-scale fracture can be furthest enhanced, and the reducing rate of the effective fracture volume with the time is reduced. Therefore, the long-time fracturing stable yield is increased.

The invention relates to hydroxyl acrylic emulsion for a water-based double-component anti-doodling anti-sticking coating and a preparation method of the hydroxyl acrylic emulsion. The hydroxyl acrylic emulsion comprises a vinyl-containing polymerizable monomer, a hydroxyl acrylate monomer, a cross-linking monomer, polymerizable organic silicon, an emulsifier and the like. The hydroxyl acrylic emulsion with a core-shell structure is prepared by adopting a step-by-step emulsion polymerization method, and hydroxyl and organic silicon are simultaneously distributed on a shell layer of emulsion particles. The coating meets national standard requirements, has the characteristics of low VOC content, small smell, high crosslinking density, strong permeability resistance, good scratch resistance,low surface tension and the like, is applied to the fields of building outer walls, urban communal facilities and the like, and can achieve good anti-doodling and anti-sticking effects.

The invention belongs to the technical field of chemical reagent purification, and relates to a method for purifying dimethyl sulfoxide. Specifically, the method comprises the following steps of: 1) performing deacidification and dehydration; 2) performing reduced pressure distillation; 3) performing primary melting crystallization; and 4) performing secondary melting crystallization. The method is low in requirement on production equipment and easy in industrialization; compared with a common method, the method provided by the invention is capable of preparing a purified dimethyl sulfoxide product with satisfactory purity (greater than or equal to 99.99%) and relatively high yield (about 85%).

The invention relates to a method for reducing the embedding of a sand blasting medium into an electroplating steel surface. The method comprises the following steps: regulating air pressure; performing sand blasting on a steel workpiece; activating the workpiece subjected to the sand blasting, soaking the workpiece with cyanogen, electroplating, performing bright dipping, removing hydrogen, performing secondary activation, and passivating; the surface quality of the steel workpiece is improved; the probability of black spots on the surface of the steel workpiece is reduced; the quality of the workpiece is improved.

The invention relates to a high-rate long-cycle performance multi-element composite positive electrode material and a preparation method thereof, wherein the positive electrode material is a hollow structural sphere with D50 of 2-7 microns, and the chemical formula of the positive electrode material is LixNiyCozMn1-y-zO2; the positive electrode material is internally doped with 0.02-1mass% of a Zcompound, wherein Z is at least one of Nb or Ta; an aluminum compound accounting for 0.01-1mass% of a matrix is coated on the surface of the positive electrode material; and in the chemical formula, x, y and z are the values of the molar ratio of the related elements, wherein x is greater than 0.9 and less than 1.3, y is greater than or equal to 0.2 and less than 1, z is greater than 0 and less than 0.5, and y+z is less than or equal to 1. By virtue of the hollow structure of the invention, the infiltration and liquid retention capability of the non-aqueous electrolyte can be enhanced, the path of lithium ion transmission can be effectively shortened, and an effective structure support is provided for high-current high-rate charge and discharge; and the hardness of the hollow sphere structure can be increased, the crystal lattice junction also can be stabilized, and meanwhile, the cycling performance of the material is greatly improved.

A ball stud (12) with a relatively short grip length, adapted for use with a turbocharger, having a flexible flange (18) extending from a center of the ball stud (12). The flexible flange (18) is between a ball section (14) and a first shaft portion (20) adjacent to the flexible flange (18) and preferably a narrower threaded shaft portion (22) extending further from the ball section (14). The first shaft portion (20) may be tapered to fit in a complementary aperture (32) of a plate (30). The flexible flange (18) preferably includes a narrow circumference (24) adjacent to a center of the ball stud (12) with a circumferential lip (26) adapted to engage a plate (30). The flexible flange (18) allows subtle flex for thermal expansion and essentially changes a spring rate of the ball stud (12) to emulate a longer fastener.

The invention discloses a durable, antistatic and dustproof finishing agent for flocking fabrics. The finishing agent is prepared by matching, by weight, 50-100 parts of methyl hydrogen silicone oil, 70-120 parts of allyl polyethoxy polypropoxy ether, 1.5-5 parts of vinyl trialkoxy silane and 0.1-0.16 part of chloroplatinic acid ethanol solution, making the materials subjected to addition reaction to obtain silicone oil co-modified by polyether and alkoxy, adding 480-820 parts of water for dilution and adding 10-20 parts of glyoxal aqueous solution and 400-500 parts of guanidine hydrochloride aqueous solution for mixing. The flocking fabrics finished through the finishing agent are soft and smooth in hand feel and have excellent antistatic properties, and the fabric surface is not prone to adsorb dust.

The invention relates to a lithium-rich manganese-based cathode material with a crosslinking structure and a preparation method thereof. The preparation method specifically comprises the following steps of (1) preparing a mixed reaction solvent of deionized water and organic alcohol; (2) mixing and dissolving soluble nickel, cobalt and manganese salts into the mixed reaction solvent; (3) heating the mixed reaction solvent to the reflux state by a microwave radiation manner; (4) under the continuous reflux state, adding an alkaline resource, and maintaining reaction, so as to obtain a nickel, cobalt and manganese hydroxide precursor; (5) fully mixing the nickel, cobalt and manganese hydroxide precursor and a lithium source, and calcining, so as to obtain the final lithium-rich manganese-based cathode material. The prepared lithium-rich manganese-based cathode material has the advantages that a crosslinking net-shaped structure is formed, the pore radius is rich, the crystallizing degreeis high, and the lithium ions are quickly disembedded and embedded at low resistance; the method for preparing the precursor of the lithium-rich manganese-based material is simple, the time is short,the organic solvent can be repeatedly recycled and used, the cost is reduced, the environment-friendly effect is realized, and the production efficiency is greatly improved.

The invention relates to a full-aromatic phenol-amine copolymer containing multifunctional groups and a preparation method and application thereof. The method comprises the steps that a phenylenediamine monomer solution reacts with a benzenediol monomer solution under the action of an oxidizing agent solution to obtain the full-aromatic phenol-amine copolymer containing the multifunctional groups, and the copolymer is used for adsorbing antibiotics in water. Compared with the prior art, copolymerization is performed on the benzenediol monomers and the phenylenediamine monomers to obtain the aromatic nucleus copolymer which contains a large number of amino groups, imine groups and hydroxyl groups and is rich in pi electrons, the copolymer can have an adsorption reaction with most organic substances, then the copolymer can efficiently remove the antibiotics such as ciprofloxacin in the water, and the ciprofloxacin removing rate can be more than 99 percent; the prepared full-aromatic phenol-amine copolymer containing the multifunctional groups has the advantages of being simple, convenient and efficient, low in cost and higher in yield and has the scale production potential, and the highest yield can reach 95.6 percent.