64results about How to "Reduce electrostatic attraction" patented technology

The invention provides a preserving fluid and its preparation method. The preserving fluid comprises 0.1-10 g/L of buffer salt, 100-300 g/L of an antibody stabilizer, 0.1-1 g/L of an anticorrosive bacteriostatic agent and 2-12 g/L of carragheenan and water. In comparison with the prior art, the invention has the following advantages: the buffer salt, antibody stabilizer and anticorrosive bacteriostatic agent in the preserving fluid maintain stability of magnetic micro-particles or magnetic nano-particles and antibody in the whole system; and viscosity of the carragheenan can decrease exponentially with rising of temperature. Solubility of the carragheenan increases with rising of temperature, molecular dissociation is intensified, electrostatic attraction between half-esterfied sulfate radicals is weakened, and molecular entanglement decreases. Then, viscosity is lowered. But viscosity increases when temperature is reduced. At 30 DEG C, molecules are gradually entangled to form a net structure so as to sharply increase viscosity. Thus, the preserving fluid is in a viscous or gelatinous state at the temperature of 2-20 DEG C but is in a fluid state at the operating temperature of 35-38 DEG C.

The invention belongs to the field of lithium ion batteries and relates to a method for preparing a high-rate artificial graphite anode material, comprising the following steps: (1) preferential selection of pulverized and shaped tailings; (2) mixing; (3) static coating and granulation; (4) breaking and spheroidization; (5) secondary mixing; (6) high-temperature graphitization; and (7) mixing andsieving. The anode material prepared by the method has excellent high rate charge/discharge performance, and has good cycle performance and low-temperature temperature. The method also fully processesand recycles the by-products produced in the processing of coke raw materials/asphalt raw materials in a high value-added manner, has broad market prospects, reduces the disposal cost of solid waste,and brings practical economic benefits.

The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a static charge modifier. The invention is also directed to the use of the catalyst composition in the polymerization of olefin(s). In particular, the polymerization catalyst system is supported on a carrier. More particularly, the polymerization catalyst comprises a bulky ligand metallocene-type catalyst system.

The invention discloses a high-throughput polyamide nanofiltration composite membrane and a preparation method thereof, which belong to the field of polymeric membrane materials. The composite membrane is prepared by the interfacial polymerization reaction between 5-(N-sulfonamido)isophthaloyl dichloride or a mixture of 5-(N-sulfonamido)isophthaloyl dichloride and 1,3,5-trimesoyl chloride and piperazine monomer, and can be widely used in a water softening process for removing bivalent cations such as Ca<2+> and Mg<2+>. The high-throughput polyamide nanofiltration composite membrane is structurally provided with an ultrathin (10nm) release layer, surface charge are low in electronegativity, the membrane surface property is smooth and hydrophilic, high throughput is shown in terms of properties, the high-throughput polyamide nanofiltration composite membrane has an excellent trapping effect on bivalent and polyvalent cations and good pollution resistance, and the high-throughput polyamide nanofiltration composite membrane can be widely applied in high-throughput domestic water purifiers, sea water desalination, brackish water pretreatment, removal of COD (chemical oxygen demand) suchas dye molecules and phenol molecules in wastewater, separation of dye/salt and material separation and concentration processes in pharmaceutical and food industries.

The invention provides a cooling plate and an evaporation device and belongs to the technical field of display. The cooling plate comprises a cooling plate body. The cooling plate body comprises a cooling face with a cooling function. Protrusions are arranged on the cooling face. By the adoption of the cooling plate and the evaporation device, the problem that during position alignment and overlapping of the cooling plate and a glass substrate, electrostatic adsorption force can be generated between the cooling plate and the glass substrate, and consequently the glass substrate is scratched easily by the cooling plate is solved.

Disclosed is a machine bench for processing base boards. The machine bench comprises a base plate, a supporting structure and a projecting column. The supporting structure is placed on the base plate and supports the base plate. The projecting column is placed on the base plate, where in the ion gas can be sprayed out by the supporting structure and/or the projecting column for eliminating statistic charge on the base board.

There is proved a variable capacitor that includes a substrate, a signal line disposed on a surface of the substrate for feeding a signal, a ground electrode disposed on the surface, and a movable electrode opposed the signal line and the ground electrode, the movable electrode operable to move toward and away from the signal line and the ground electrode. The movable electrode can be displaced by an electrostatic attraction between the movable electrode and the signal line and between the movable electrode and the signal line. An amount of displacement of the movable electrode varies according to an amount of the voltage which generates the electrostatic attraction.

A micro electromechanical relay opens and closes an electrical circuit by contact/separation between a fixed contact disposed on a base and a movable contact disposed on an actuator by driving of a movable electrode by electrostatic attraction by application of voltage between a fixed electrode disposed on the base and a movable electrode of the actuator. The actuator comprises a supporting portion disposed on the base, a beam portion extending in a cantilevered manner from the supporting portion, and a movable electrode and a movable contact elastically supported by the beam portion. The beam portion elastically supports, in order from the supporting portion end, the movable electrode and the movable contact. A slit is formed from the side of the supporting portion in the portion of the actuator connecting the beam portion and the movable electrode.

The invention involves a preparation method of liquid phase nanometer silver colloid. The method is characterized by comprising the following steps that first, silver salt compounds and ligand are evenly mixed according to the weight ratio of 1:90 to 1:100, the mixture is heated to 55 DEG C to 75 DEG C, and the temperature is kept so that uniform liquid can be formed, wherein the ligand is organic matter containing amido or carbonyl groups; second, reduction agents are added into the liquid, the weight ratio of the reduction agents to the silver salt compounds is 1:2 to 1:3, stirring is performed at the temperature ranging from 20 DEG C to 100 DEG C till the reduction agents are totally dissolved, and then nanometer silver liquid can be obtained; the reduction agents are selected from carbohydrates having the reducibility, or polyalcohol having the reducibility, or solid organic acids having the reducibility. The preparation method is simple and easy to operate, the made liquid phase nanometer silver liquid is stable, and the diameter of nanometer silver particles ranges from 2 nm to 10 nm.

The invention discloses an alkali-activated slag cement retarder, which comprises by weight: 20%-30% of sodium chromate, 40-50% of sulfamic acid heterocyclic condensation compound, 20-30% of organosilicon surfactant. In the invention, charged negative and positive particles are introduced to prevent or slow down the movement speed of calcium ions under the influence of charge repulsion, or to reduce the electrostatic attraction of silicate ions, so that the generation of hydrate calcium silicate can be prevented. Thus, the delay of silicate ion polymerization can be realized. Meanwhile, the surface of a reaction product is adsorbed with the organosilicon surfactant, so that the delayed coagulation can be realized under double actions.

The invention provides a DNA (desoxyribonucleic acid) eluent. The eluent comprises an acid-base buffer solution and an ionic liquid, wherein the ionic liquid is a compound containing imidazolyl cations; the pH value of the eluent is 5 to 13. The eluent provided by the invention comprises the compound containing imidazolyl cations, wherein the compound interacts with negatively charged DNA; the DNA is eluted off from the surface of a solid phase adsorbing material; based on the pH value of the eluent, the electrostatic attraction between the solid phase adsorbing material and DNA fragments is lowered and the elution capability of the eluent is further improved. The invention further provides a DNA elution method adopting the eluent for adsorbing the solid phase adsorbing material.

The invention belongs to the technical field of cleaning and washing of particular and powdered materials such as refractory materials, ground materials, carbon and quartz sand, and in particular relates to a novel environmentally-friendly particular and powdered material surface cleaning system. The system comprises a feeding device, a cleaning device, a dust collecting device and a dust removal device which are sequentially connected; the dust removal device is connected with the cleaning device through an air inducing device. With the adoption of the system, various particles and powdered materials can be treated; coarse granular dust and fine granular dust can be respectively cleaned and collected; high pressure air can be heated through a heating device, thus the materials can be indirectly heated and flushed, the static absorbing force of impurities and dust on the surfaces of the materials can be reduced, the materials can be easily separated from the impurities and dust, and as a result, the purpose of cleaning and washing the particular and powdered material surface can be achieved.

The invention discloses a tubular carpet dust removal device, which comprises a first tube body and a plurality of second tube bodies, wherein the first tube body is arranged above the carpet and is in a cylindrical structure; a blow hole is formed in the upper end of the first tube body and is connected with an air source through an air blow pipe; a spiral guide plate is arranged in the first tube body along the inner wall; the starting position of the guide plate is flush with the position of the blow hole; any second tube body is in the cylindrical structure; the length of each second tube body is less than that of the first tube body by 5mm; the plurality of second tube bodies are circularly arranged on the first tube body and are in layered distribution; the pipe diameters of the plurality of second tube bodies are gradually increased from the center to the periphery; the upper ends of the plurality of second tube bodies are communicated with an air suction pipe; and the air suction pipe is communicated with an air suction device. The tubular carpet dust removal device is good in dust removal effect and high in dust removal efficiency, and is easily assembled into a large dust remover.

Phosphorus-containing polymer hydrogel is prepared by the following steps: 1) mixing a phosphonic acid olefin compound with an acrylate compound or an acrylamide compound or a vinyl azole compound to obtain a mixture, dissolving the mixture as a comonomer in a first solvent, and adding a cross-linking agent to obtain a monomer solution for later use; 2) dissolving an initiator in a second solvent to obtain an initiator solution for later use; and 3) heating the monomer solution to 60-80 DEG C, dropwise adding the initiator solution, and copolymerizing to obtain a hydrogel product. The phosphorus-containing polymer hydrogel prepared by the invention has high adsorption efficiency on pollutants in wastewater, can be regenerated and reused, and is a green and renewable wastewater adsorption material.

The invention provides a solid electrolyte membrane of a lithium-sulfur battery. The solid electrolyte membrane comprises a polymer with polar functional groups and inorganic particles capable of catalyzing and adsorbing polysulfide. The invention also provides a preparation method of the solid electrolyte membrane and the lithium-sulfur battery comprising the solid electrolyte membrane. The polarfunctional groups in the polymer in the solid electrolyte membrane can be adsorbed with positive ions in inorganic particles (PSCC) capable of catalyzing and adsorbing the polysulfide in an active manner; the uniform distribution of charges is stabilized; meanwhile, PSCC cations are helped to be chelated; however, when polysulfide (PS) anions migrate and diffuse to the vicinity of the electrolytemembrane, due to the fact that strong adsorption-catalysis-conversion acting force exists between the PSCC cations and the PS anions, the migration of the PS anions can be inhibited at the same time,the PS anion conversion is improved, and the lithium-ion transmission efficiency is improved.

Provided is a low-cost electrostatic attraction transfer apparatus which can perform high-speed transfer, stabilizes a contact status of an electrostatic attraction board with a film and the like and does not generate fine defects on an object to be transferred.

The invention discloses powdered ink for a laser printer and a preparation method thereof, and relates to the technical field of printing consumables. The powdered ink for the laser printer is prepared from the following raw materials of 13 to 30 parts of carbon black, 15 to 35 parts of butyl acrylate, 5 to 15 parts of hollow glass beads, 3 to 6 parts of silicon dioxide, 1 to 5 parts of surfactant, 15 to 30 parts of styrene, 18 to 35 parts of azodiisobutyronitrile, 18 to 30 parts of polyvinyl alcohol, and 8 to 15 parts of polypropylene wax, wherein the particle size of the hollow glass bead issmaller than 2 micrometers. The preparation method of the powdered ink for the laser printer comprises the following steps of firstly, mixing the butyl acrylate, the styrene and the hollow glass beads, and then performing condensation reaction. The powdered ink adopting the formula and the preparation method has the advantages that the storable property is excellent, the caking is avoided even ifstoring for a long time, the comprehensive property is excellent, and the application range is wide.

The invention discloses a storable toner and a preparation method thereof and relates to the technical field of print consumables. The storable toner is prepared from the following raw materials: 15 to 35 parts of nano-carbon black, 15 to 30 parts of butyl acrylate, 5 to 15 parts of hollow glass beads, 2 to 6 parts of silicon dioxide, 1 to 5 parts of surfactant, 20 to 30 parts of styrene, 20 to 35parts of azodiisobutyronitrile, 15 to 30 parts of polyvinyl alcohol and 10 to 18 parts of silane coupling agent, wherein the particle size of the hollow glass beads is smaller than 2 microns. The preparation method of the storable toner comprises the following steps: firstly, mixing the butyl acrylate, the styrene and the hollow glass beads; secondly, carrying out polymerization reaction. The toner prepared by the preparation method and a formula provided by the invention has the advantages that storability is excellent and the agglomerating phenomenon is avoided after long-term storage; meanwhile, the comprehensive performance is excellent and the application range is wide.