473 results about "Colloidal Solution" patented technology

The embodiment of the invention discloses a biological composite liquid material capable of releasing negative oxygen ions as well as a preparation method and application of the biological composite liquid material. The invention discloses a preparation method of a traditional Chinese medicine. The biological composite liquid material is prepared from 12 to 18 parts of plant extract, 1 to 4 parts of silver ion solution, 2 to 5 parts of titanium dioxide, 10 to 15 parts of nano silicon dioxide, 2 to 8 parts of sodium oxide, 1 to 6 parts of magnesium oxide dispersion liquid, 0.5 to 1.5 parts of calcium hydroxide solution, 1 to 3 parts of ferric oxide colloidal solution, 2 to 6 parts of zinc oxide dispersion liquid, 12 to 18 parts of mixed silica sol and 15 to 20 parts of nano borosilicate liquid material. 0.5-1.5 parts of a surfactant, 4-8 parts of glycerol and 10-15 parts of deionized water. The biological composite liquid material has the characteristic of efficiently releasing negative oxygen ions, can effectively improve the air quality, is good in stability, convenient to use, safe and reliable, can be widely applied to the fields of air purification, medical care, building materials and the like, and has a wide market prospect.

The invention belongs to the field of electrochemistry, and discloses a silicon-carbon negative electrode material based on nanocellulose and a preparation method and application thereof. The preparation method comprises the following steps: dispersing cellulose in deionized water, and carrying out physical stripping and ionic liquid assisted acidolysis to obtain a cellulose colloidal solution; and dispersing the conductive agent and the carbon source into the colloidal solution, adding the coupling agent and the silicon source, and carrying out spray drying and sintering. According to the invention, nano cellulose preparation and silicon carbon preparation processes are combined, so that an intermediate separation process is reduced, and the process is simplified. Meanwhile, in the silicon-carbon balling process, the ionic liquid and the coupling agent in the slurry can induce and promote surface combination of the carbon source and the silicon source; the nano cellulose promotes nano-micro forming of components such as silicon and carbon, and is coupled with the conductive agent in the carbonization process to form an internal conductive network and a coating layer; in the carbonization process, hydrolysis catalyst metal ions play a role in catalyzing gas source cracking deposition to form a stable coating carbon layer. The silicon-carbon material is novel in route, rapid electron transmission and capacity exertion are guaranteed through the conducting layers from inside to outside, and the cycling stability of the material can be improved through the multi-carbon-layer coating structure.

The invention discloses a preparation method and application of a carbon dioxide gas capture functional molecule modified nanogold catalyst. The preparation method comprises the following steps: synthesizing a modified molecule with a carbon dioxide gas capturing function through a chemical reaction; adding the modified molecules into an organic solvent, and uniformly mixing to obtain a solution; then adding a nanogold colloidal solution into the solution, uniformly stirring, and carrying out oil bath heating reaction; and after the reaction is completed, cooling to room temperature, carrying out suction filtration on the reaction liquid, respectively washing with ethanol and deionized water, and carrying out vacuum drying on the product to obtain the carbon dioxide gas capture functional molecule modified nanogold catalyst. In the electrocatalytic carbon dioxide reduction reaction process of the obtained catalyst, modification molecules are connected with the nanogold catalyst through chemical bonds, active sites of the nanogold catalyst are exposed, and meanwhile, an interface environment beneficial to the carbon dioxide reduction reaction can be provided; therefore, high activity, high selectivity and high stability of the molecular modified nanogold catalyst are realized.

A method of desorbing CO2 from an aqueous liquid comprising CO2, the method comprising the steps of: a) providing said aqueous liquid in the form of an aqueous colloidal solution comprising (i) a CO2 absorbent having CO2 absorbed thereto and (ii) colloidal catalyst having a core-shell structure in which the shell comprises proton-donor groups, and b) thermally desorbing CO2 from the CO2 absorbent, wherein the thermal desorption of the CO2 is catalysed by the colloidal catalyst.

The invention relates to the technical field of biological medicine, and particularly discloses an atopic dermatitis treatment medicine and a preparation method and application thereof.The preparation method comprises the steps that sodium alginate, sodium polyacrylate and water are mixed and then subjected to a swelling reaction, and a colloidal solution with the viscosity larger than or equal to 5000 cP is formed; mixing upatinib, a preservative, glycerol and azone to obtain a raw material phase; and mixing the colloidal solution with the raw materials, and homogenizing to obtain the atopic dermatitis treatment medicine. Through swelling reaction of sodium alginate and sodium polyacrylate, the viscosity of a colloidal solution is remarkably improved through molecular chain entanglement, charge repulsion and water absorption synergistic effects of sodium alginate and sodium polyacrylate; through compounding of all the components, the transdermal efficiency of the medicine is improved, the irritation of the medicine is reduced, and meanwhile, the inhibition efficiency on atopic dermatitis inflammatory factors is also improved.

The invention relates to the technical field of pesticide detection, and discloses a multi-component colloidal gold test strip for rapid detection of organophosphorus as well as a preparation method and application thereof, the preparation method comprises the following steps: preparing a specific antibody of the organophosphorus, and preparing a colloidal gold solution at the same time; mixing and incubating the specific antibody and a colloidal gold solution to obtain an antibody-labeled colloidal gold solution; pre-treating a detection pad, and immersing the detection pad in the antibody-labeled colloidal gold solution to obtain an impregnated pad; and sequentially assembling the dried dipping pad, a water absorption pad, a sample pad and a combination pad on a bottom plate to form a complete test strip. By improving the preparation process of the antibody and the assembly technology of the test strip, the detection sensitivity and specificity are remarkably improved. The test strip is simple and convenient in preparation process, high in cost benefit and convenient for large-scale production. In addition, the test strip is convenient to use and does not need to depend on professional equipment or technicians, and the detection result is visual and convenient to read.

The invention discloses carbon-coated ferric sodium pyrophosphate as well as a preparation method and application thereof. The preparation method of the carbon-coated ferric sodium pyrophosphate comprises the following steps: 1) adding a phosphorus source, an iron source and a sodium source into an aqueous solution to obtain a mixed solution; dispersing a conductive agent into the mixed solution to obtain dispersion liquid; carrying out spray drying on the dispersion liquid to obtain a ferric sodium pyrophosphate precursor containing the conductive agent; 2) dissolving chitosan in an acetic acid aqueous solution to obtain a chitosan colloidal solution; then adding feather keratin into the chitosan colloidal solution, heating and stirring until the feather keratin is uniformly dispersed to obtain a dispersion liquid of double carbon sources; adding a conductive agent-containing ferric pyrophosphate sodium precursor into the double-carbon-source dispersion liquid, uniformly stirring and mixing, and heating and evaporating to dryness to obtain a carbon source-coated ferric pyrophosphate sodium precursor; and 3) carrying out heat treatment on the carbon source-coated ferric pyrophosphate sodium precursor in an inert atmosphere to obtain carbon-coated ferric pyrophosphate sodium.

The invention provides a porous material for heat insulation of a drilling shaft and a preparation method and application thereof, and belongs to the technical field of oilfield chemistry. The preparation method of the porous material comprises the following steps: fully and uniformly mixing ceramsite powder and a pore-forming agent; the colloidal solution is used as a binder, and porous ceramsite is obtained through granulation and heat treatment; the preparation method comprises the following steps: fully dispersing porous ceramsite, an anionic monomer and a cationic monomer in deionized water, adding an initiator, reacting, washing, and drying. The porous material adopts natural ores and industrial wastes as raw materials, and the raw materials are cheap, easy to obtain, low in cost, green and environment-friendly. The porous material is applied to shaft heat insulation and can prevent ceramsite from being screened out by a solid-liquid separation device, and repeated recycling is facilitated; a large number of micron-scale and nano-scale pores are formed in the porous material, the heat conductivity coefficient is low, and the heat insulation effect is good; the surface of the porous material contains abundant anion and cation groups, and the porous material can be adsorbed on the shaft wall for effective and stable heat insulation.

Provided in the present invention are a continuous-reforming catalyst and a preparation method therefor, belonging to the technical field of catalyst preparation. The method comprises: performing hydrothermal crystallization on a first aluminum source and a modifier to obtain aluminum oxide precursor nanofibers; mixing the aluminum oxide precursor nanofibers with a second aluminum source, and adding the mixture to a solution of a platinum-containing compound, a tin-containing compound, and a lanthanide-containing compound to prepare a catalyst precursor slurry; adding gelatin and gum arabic to the catalyst precursor slurry, uniformly mixing same to prepare a composite colloidal solution, adding the composite colloidal solution dropwise to a liquid column consisting of an upper-layer oil phase and a lower-layer curing agent solution to shape the composite colloidal solution, then after aging, drying, and calcining, obtaining an oxidized spherical catalyst; and reducing the obtained oxidized spherical catalyst to obtain an activated spherical catalyst. Because active metals can be better dispersed on the surface of the spherical catalyst, the dispersion of Pt is improved, thus improving the carbon deposition resistance and stability of the catalyst.

The invention discloses a preparation method of mannan oligosaccharide, and relates to the technical field of organic agricultural fertilizers. According to the method, high-purity and high-efficiency mannan oligosaccharide is prepared by using an advanced process, and the method comprises the following specific steps: pretreatment of raw materials: mixing konjaku flour or guar gum with water to obtain a colloidal solution; adding beta-mannase and alpha-galactosidase into the colloidal solution, and carrying out enzymolysis under the assistance of a pulsed electric field; performing secondary separation on the enzymatic hydrolysate through an ultrafiltration membrane and a nanofiltration membrane, and collecting trapped fluid. A calcium ion solution is added into the trapped fluid for a complex reaction, then spray drying is conducted, and mannan oligosaccharide powder is obtained. According to the method, mannan oligosaccharide with concentrated purity and polymerization degree is prepared through ultrahigh pressure homogenization, pulsed electric field assisted enzymolysis and membrane separation technologies, the method has the advantages of high efficiency and environmental protection, and the preparation efficiency and the product quality are remarkably improved. The prepared mannan oligosaccharide can be applied to organic agricultural fertilizers, and can be compounded with humic acid and other substances to improve the biological activity and soil fertility of the fertilizers.

A majority of military casualties occur during the pre-hospital period. The cause of death is largely associated with massive traumatic bleeding that leads to organ damage due to sustained hypoxia. Currently, therapeutics are lacking at the point of injury to mitigate hypoxic damage and maintain the survivability of severe hemorrhage prior to reaching medical facilities. This invention addresses that by introducing a method of co-administering prolyl hydroxylase domain inhibitor (PHDi, MK-8617), anti-fibrinolytic agent (tranexamic acid), and bradykinin receptor antagonist (icatibant) as anti-hemorrhage agents in combination with resuscitation fluid treatment with colloid solution of 25% human albumin that has an advantage of relatively small volume requirement to maintain blood volume. In addition, a kit comprising anti-hemorrhage agents that can be easily carried to the battlefield is also provided here. The therapeutic application of those agents on or near the point of injury can stabilize hypoxia inducible factor-1 alpha and enhance blood clot formation, which improves the patient's cellular adaptation to hypoxia and reduce hemorrhage, and thus can decrease organ failure and increase the patient's survivability.

The invention relates to the technical field of water-soluble fertilizers, in particular to an amino-alginic acid organic water-soluble fertilizer and a preparation method thereof.The preparation method comprises the following steps that S1, one or more of macroelements, medium elements, microelements, amino acid and humic acid are dissolved to obtain a solution A; s2, adding nano silicon dioxide into the solution A, and uniformly dispersing to obtain a solution B; s3, adding sodium alginate into the solution B to obtain a colloidal solution C; s4, adding a stabilizer and a synergist into the colloidal solution C to obtain a colloidal solution D; s5, performing spray drying on the colloidal solution D to obtain solid powder E; s6, dissolving the degradable polymer, and adding a cross-linking agent to obtain a solution F; and S7, uniformly spraying the solution F onto the solid powder E, and performing spray drying to obtain the water-soluble fertilizer. According to the water-soluble fertilizer disclosed by the invention, the manner of coating the nanoparticles with the nanocapsules is adopted, so that the water-soluble fertilizer is efficiently utilized, and the yield and the quality of crops are improved.

An electrophoretic display with aligned micro-compartment structures includes: a control substrate having a first surface and a second surface; a driving circuit layer, a control electrode layer and an electrophoresis layer, wherein the driving circuit layer, the control electrode layer and the electrophoresis layer are sequentially arranged on the second surface of the control substrate; the electrophoresis layer is provided with a micro-compartment structure, is arranged above the control substrate and is made of a high polymer material, the micro-compartment structure comprises a plurality of partition walls to define a groove chamber filled with a colloidal solution, and the overlapping area of the partition walls and the control electrodes is smaller than 50% of the area of the control electrodes in the projection direction of the partition walls in the viewing surface.

The invention belongs to the technical field of membrane separation, and discloses an organic metal armored MXene membrane and preparation and application thereof.The preparation method comprises the steps that S1, lithium salt and an acid solution are mixed, a three-dimensional layered MAX raw material is added, stirring, centrifugal washing, ultrasonic treatment and centrifugation are conducted, and a two-dimensional MXene nanosheet dispersion liquid is obtained; and S2, adding an organic metal salt into the two-dimensional MXene nanosheet dispersion liquid, carrying out stirring reaction to carry out organic metal salt modification on MXene nanosheets, and carrying out vacuum filtration or blade coating or spin coating on a porous substrate with a modified MXene nanosheet colloidal solution to obtain the organic metal armored MXene film. MXene is modified through organic metal, interaction between solvent molecules and the MXene membrane is weakened and interlayer spacing and solvent mass transfer behavior are regulated and controlled by means of stable combination of the organic metal and the MXene, so that separation performance and swelling resistance are remarkably improved, and the technical problems that a traditional MXene membrane material is large in swelling and mass transfer resistance, low in separation efficiency and the like are solved.

The invention belongs to the technical field of temperature sensors, and particularly relates to a wide-range temperature sensor and a preparation method thereof. The method comprises the following specific steps: S1, transferring 1-50 ml of a SnO2 nanoparticle colloidal solution into a reaction container; dissolving 1, 4-benzene dithiol in ethanol to obtain a mixed solution, adding 100 [mu] l of the mixed solution into the reaction container to be mixed with the nanoparticle colloidal solution, and incubating in a water bath environment to form a modified compound; s2, sequentially centrifuging and washing the formed modified compound, and then dispersing the modified compound in 1mL of ethanol to obtain a modified SnO2 nanoparticle modification solution; and S3, dispensing the SnO2 nano-particle modification solution on a substrate with two electrodes to form a SnO2 nano-particle modification layer, and connecting the SnO2 nano-particle modification layer to a signal acquisition circuit through the electrodes to prepare the temperature sensor. The temperature sensor based on the SnO2 nano material modified by 1, 4-benzene dithiol can be suitable for monitoring in a wide temperature range.

An electrophoresis display with improved micro partition structure includes a control substrate having a first face and a second face, a driving circuit layer, a control electrode layer, and an electrophoresis layer. The driving circuit layer, the control electrode layer, and the electrophoresis layer are sequentially arranged on the second face. The electrophoresis layer includes a micro partition structure arranged on the control substrate and made from polymer material. The micro partition structure includes a plurality of partition walls to define chambers for accommodating a colloidal solution. The height of the partition wall of the micro partition structure is smaller than 25 μm.

The invention discloses a preparation method of a heat-insulating ionic adhesive film and safety glass thereof, and belongs to the technical field of glass preparation. The preparation method comprises the following steps: S1, stirring and mixing Cu (NO3) 2.3 H2O and ionic liquid to obtain a blue colloidal solution; s2, reacting the blue colloidal solution in a reaction kettle, collecting a nano CuS product, and dispersing the nano CuS product in deionized water to obtain flaky nano CuS; s3, a silane coupling agent is dissolved in absolute ethyl alcohol and stirred, a mixed solution is obtained, nano CuS is added into the mixed solution, magnetic stirring is conducted, and then ultrasonic treatment is conducted; s4, blending the solution subjected to ultrasonic treatment with SGP resin, and then taking out and drying to obtain a blend; and S5, extruding the blend into a sheet by using a parallel twin-screw extruder, and pressing and shaping the extruded sheet by using a conveyor belt tractor to obtain the adhesive film. The oxygen vacancy modified CuS improves the photocatalysis, antibacterial or ultraviolet shielding performance and is suitable for building or automobile glass, and the SGP resin matrix has high transparency, weather resistance and flexibility and is suitable for laminated safety glass.

The invention provides a carbon-supported platinum-cobalt-copper multifunctional alloy catalyst and a preparation method and application thereof, and belongs to the technical field of energy materials. Wherein the nanocarbon carrier solution is mixed with a chloroplatinic acid solution, a cobalt chloride solution and a copper chloride solution, a sodium hydroxide aqueous solution is added to adjust the pH value, ultrasonic dispersion and stirring are performed to obtain turbid liquid, and the molar ratio of platinum ions to cobalt ions to copper ions is 2: (0.5-1): (0.5-1); then, putting the turbid liquid into a reaction kettle, and reacting at 120-250 DEG C for 1-6 hours to obtain a black colloidal solution; then filtering, washing and drying the black colloidal solution to obtain black powder; and finally, carrying out acid treatment on the black powder, and grinding to obtain the carbon-loaded platinum-cobalt-copper multifunctional alloy catalyst. The catalyst is used for catalyzing an oxygen reduction reaction of a cathode in a hydrogen fuel cell and / or a methanol fuel cell, and / or catalyzing a methanol oxidation reaction of an anode in a direct methanol fuel cell.

The invention relates to the technical field of thickening agents, and particularly discloses a novel thickening agent for oil well fracturing and a preparation method thereof. The preparation method of the novel thickening agent for oil well fracturing comprises the following steps: preparing modified hydroxyethyl methylacrylate; preparing a gradient branched polymer solution; preparing sulfonic acid-boric acid double-modified montmorillonite powder; preparing a colloidal solution; the colloidal solution is centrifuged, spray-dried and sieved, and the novel thickening agent for oil well fracturing is obtained. The novel thickening agent for oil well fracturing has temperature resistance, salt resistance and self-repairing performance, in practical application, in the low-temperature pumping injection stage, the thickening agent can be rapidly thickened and carry a proppant, the self-repairing performance is triggered after the thickening agent enters a high-temperature stratum, a dynamic network part is dissociated during flowback, the viscosity is reduced, and reliable technical support is provided for development of deep shale gas and tight oil.

The invention discloses a Ti / IrO2-RuO2 coating titanium anode and a preparation method and application thereof, and belongs to the technical field of titanium electrodes, the titanium anode comprises a titanium substrate and a metal oxide coating; the molar ratio of Ir to Ru in the metal oxide coating is 5: 5. The preparation method comprises the following steps: adding a mixed solution of citric acid and ethylene glycol into a mixed solution of ruthenium trichloride and chloroiridic acid, then dropwise adding water and hydrochloric acid, carrying out ultrasonic treatment to obtain a mixed colloidal solution, coating a titanium substrate with the mixed colloidal solution, drying, and sintering to obtain the Ti / IrO2-RuO2 coating titanium anode. The invention further discloses the titanium anode prepared through the preparation method and application of the titanium anode in zinc electrodeposition. The Ti / IrO2-RuO2 coating titanium anode provided by the invention has good electrochemical performance, and compared with grains prepared by a thermal decomposition method, the Ti / IrO2-RuO2 coating titanium anode is finer and more uniform in grain, larger in specific surface area and better in electro-catalytic activity.

The invention relates to the technical field of rhinitis medicine preparation, in particular to zirconium-doped cerium oxide nano-enzyme for preparing allergic rhinitis drops and a preparation method of the zirconium-doped cerium oxide nano-enzyme. The preparation method comprises the following steps: step 1, weighing a cerium acetylacetonate (III) hydrate and a zirconium acetylacetonate (IV) hydrate, adding into oleylamine, magnetically stirring and uniformly mixing, and carrying out ultrasonic treatment on the mixture; step 2, putting the mixed solution in the step 1 into a drying oven, heating, preserving heat, and aging to obtain a dark brown colloidal solution; step 3, naturally cooling the colloidal solution to room temperature, adding acetone, centrifuging, discarding supernate, and repeating centrifugal washing for several times; and 4, carrying out vacuum drying on the precipitate obtained in the step 3, and fully grinding to obtain the zirconium-doped cerium oxide nano-enzyme. The prepared zirconium-doped cerium oxide nano-enzyme is applied to preparation of allergic rhinitis drops. The zirconium-doped cerium oxide nano enzyme reduces the inflammatory factor level of the AR mouse and inhibits degranulation of nasal mucosa MCs, so that the pathological state and allergic symptoms of the AR mouse are improved.

The invention relates to the technical field of nano materials, in particular to a modified Ti3C2Tx composite material and a preparation method thereof. According to the specific technical scheme, the preparation method of the modified Ti < 3 > C < 2 > T < x > composite material comprises the following steps: mixing few layers of Ti < 3 > C < 2 > T < x > nanosheets and a PEI solution in a NaCl solution to prepare a colloidal solution; and carrying out centrifugal deposition on the colloidal solution, washing with a NaCl solution, carrying out vacuum filtration after washing, and drying to obtain the PEI-Ti3C2Tx composite film. According to the invention, strong bonding is formed through electrostatic interaction between polycations of polyethyleneimine and Ti3C2Tx with negative charges, and the polyethyleneimine is added into the epoxy resin to enhance the corrosion resistance of the water-borne epoxy resin in a deep sea environment.

Provided in the present invention are a spherical catalyst for hydrogen peroxide synthesis via an anthraquinone process and a preparation method therefor, belonging to the technical fields of catalytic materials and catalyst preparation. The method comprises: reacting a first aluminum source, which has P123 mixed therein, with a precipitant to obtain an aluminum oxide precursor, redispersing the aluminum oxide precursor in P123 and assembling to obtain a porous aluminum oxide precursor; dispersing the porous aluminum oxide precursor and a second aluminum source in deionized water, and adding a solution of a palladium-containing compound and an additive-containing compound to prepare a catalyst precursor slurry; adding gelatin and gum arabic to the catalyst precursor slurry and uniformly mixing same to prepare a composite colloidal solution, adding the colloidal solution dropwise to a liquid column consisting of an upper-layer oil phase and a lower-layer curing agent, and then carrying out aging, drying, calcining, and reduction to obtain the spherical catalyst. The present invention is doped with the porous aluminum oxide precursor, thereby improving the pore structure of the catalyst, increasing the utilization rate of the interior of spherical aluminum oxide, and reducing the mass transfer resistance of the reaction.

The invention relates to the technical field of seed coating materials, and discloses a wheat and rice seed coating material and a coating process. The wheat and rice seed coating material comprises micron iron powder, nano calcium phosphate, nano magnesium hydroxide and a binder, the addition amounts of the micron iron powder, the nano calcium phosphate and the nano magnesium hydroxide respectively account for 10%-20%, 2%-10% and 3%-10% of the total weight of the seeds; the binder is at least one of a polyvinyl alcohol colloidal solution, a carboxymethyl cellulose colloidal solution and a hydroxypropyl methyl cellulose colloidal solution. The invention also provides a coating process of the wheat and rice seed coating material. The coating material disclosed by the invention not only can protect seeds, but also can efficiently adsorb and fix heavy metal ions of lead, cadmium and arsenic after the micron iron powder, the nano calcium phosphate and the nano magnesium hydroxide are slowly released in soil, so that integrated prevention and control from'seeds' to'rhizosphere 'is realized.

The invention discloses a preparation method and application of an aerogel catalyst, and belongs to the technical field of catalytic combustion. The preparation method comprises the following steps: firstly, preparing silicon dioxide nanofibers from a mixed solution of polyvinyl alcohol (PVA) and tetraethyl orthosilicate (TEOS) through an electrostatic spinning method; then loading noble metal palladium (Pd) or platinum (Pt) onto the silicon dioxide nanofiber; dispersing the silicon dioxide nanofiber loaded with the noble metal into a colloidal solution; then removing the solvent in the colloidal solution to obtain an aerogel precursor; and finally, calcining the aerogel precursor at high temperature to obtain the catalyst. The preparation method has the characteristics of high efficiency, environment friendliness, simple process and the like, and the aerogel product has high temperature resistance, flexibility and connectivity and has a wide application prospect in the field of catalytic combustion.

The invention relates to the field of oilfield drilling, and particularly discloses a salt-resistant thickening agent for fracturing and a preparation process thereof, and the preparation process comprises the following steps: firstly performing intercalation modification on bentonite, and then performing mixed modification treatment on PAMAM, acrylic acid and sodium vinylsulfonate to obtain sulfonated bentonite; the preparation method comprises the following steps: taking acryloyloxyethyl trimethyl ammonium chloride, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide and allyl polyoxyethylene ether as basic monomers to prepare a basic monomer mixed solution; and adding sulfonated bentonite into the basic monomer mixed solution, stirring, reacting and preserving heat under the protection of inert gas and the action of an initiator to obtain a colloidal solution, and drying to obtain the salt-resistant thickening agent. The invention further discloses the salt-resistant thickening agent for fracturing, which is prepared by adopting the preparation process. The preparation method has the characteristic that the thickening agent which is good in salt resistance and can still keep excellent shear stability under a high-temperature condition is prepared.

The application discloses a N2O decomposition catalyst taking waste and old rare earth-based denitration catalyst as raw material and a preparation method thereof, and the catalyst is prepared from the waste and old rare earth-based denitration catalyst, diatomite and kaolin as a N2O decomposition catalyst carrier, and a nickel-lanthanum composite oxide (NiLaO x ) as a catalytically active component. The waste and old rare earth-based denitration catalyst, diatomite and kaolin are prepared into the carrier through crushing, batching and calcining processes, a nickel-lanthanum composite oxide precursor is configured into a colloidal solution, then the carrier is immersed in the nickel-lanthanum composite oxide precursor colloidal solution, and the N2O decomposition catalyst is obtained through drying and calcining. The catalyst not only realizes harmless disposal of the waste and old rare earth-based denitration catalyst, but also uses the waste and old rare earth-based denitration catalyst as a high-value resource for N2O decomposition, and the catalyst has high N2O decomposition activity and strong stability.

The invention relates to the technical field of catalyst preparation, in particular to an Mm (Mo3S11) n / Ni Foam catalyst with a nano network structure as well as a preparation method and application of the Mm (Mo3S11) n / Ni Foam catalyst. The preparation method of the Mm (Mo3S11) n / Ni Foam catalyst with the nano network structure comprises the following steps: (1) adding a metal salt into a colloidal solution of (NH4) 2Mo3S13. 2H2O, and carrying out self-assembly to obtain an Mm (Mo3S11) n solution; and (2) adding the Mm (Mo3S11) n solution obtained in the step (1) to a cleaned foamed nickel substrate, and carrying out self-assembly to obtain the nickel-based composite material. The obtained catalyst can well activate PMS and degrade organic pollutants.

The invention relates to the technical field of lithium ion batteries, and discloses a fluorine-free binder of silk fibroin cross-linked polyacrylic acid and a preparation method and application of the fluorine-free binder of silk fibroin cross-linked polyacrylic acid, and the method comprises the following steps: dissolving polyacrylic acid in deionized water to prepare a polyacrylic acid colloidal solution with the mass fraction of 3-10%; the preparation method comprises the following steps: dissolving silk fibroin in deionized water to prepare a silk fibroin solution with the mass fraction of 3-10%; uniformly mixing the polyacrylic acid colloidal solution and the silk fibroin solution according to the proportion that the silk fibroin accounts for 10-50% of the total mass of the polyacrylic acid and the silk fibroin to obtain a mixed colloidal solution; and adding an ethanol solution into the mixed colloidal solution to convert the silk fibroin in a disordered state into an ordered state, and heating and drying to obtain the fluorine-free binder of the silk fibroin cross-linked polyacrylic acid. The fluorine-free binder disclosed by the invention is applied to a silicon negative electrode of a lithium ion battery, and the problems of poor electrochemical performance and short cycle life of the silicon negative electrode caused by poor adhesion performance and mechanical performance of the binder can be effectively solved.

A megasonic auxiliary polishing device for a large-diameter gallium antimonide wafer relates to the technical field of wafer surface polishing and comprises a wafer carrier head, a polishing disc and a megasonic generator. The polishing solution containing device is arranged above the megasonic generator, a high-frequency oscillation signal sent by the megasonic generator is converted into high-frequency mechanical oscillation to be transmitted into the polishing solution, an agglomerated colloidal solution formed by an abrasive part in the polishing solution is scattered, aggregation of nanoscale micelles is inhibited, and then the uniform distribution of the polishing solution colloidal solution on the polishing disc is promoted. The consistency of the roughness of the surface of the wafer in the polishing process is high; the polishing disc is in a circular ring shape, the wafer carrying heads are evenly distributed on the circumference of the polishing disc, the portion, between the adjacent wafer carrying heads, of the polishing disc is provided with a washing cover, washing pipes are evenly arranged in the washing cover, and liquid discharged from the lower ends of the washing pipes washes the polishing disc to wash away scraps on the surface of the polishing disc. And an adverse influence factor on the polishing quality of the wafer is reduced by one, so that the controllability of the polishing quality is improved.