70results about How to "The preparation process is simple and easy to control" patented technology

The invention discloses a vegetable oil polyol preparation method by using a continuous method. The vegetable oil polyol preparation method comprises the following steps: firstly mixing oxydol and organic acid, adding a catalyst and a stabilizing agent, simultaneously pumping vegetable oil and mixed solution into a micro-channel modular reactor, maintaining reaction residence time for 5-18 min, performing reaction at normal pressure with the temperature of 65-130 DEG C, still standing a reaction product for liquid separation, collecting oil phase to be washed to neutral by using a Na2CO3 solution, and then performing liquid separation and rotary evaporation to obtain the vegetable oil polyol. The vegetable oil polyol preparation method provided by the invention can be operated continuously, and in the process, two steps of epoxidation and ring-opening are integrated into one step, so that the preparation process is simple, easy to control, high in safety, short in reaction time, low in energy consumption and low in pollution, can weaken side reaction, further has the characteristics of simple production device, easiness in assembly and disassembly, and convenience in carrying and moving, can be adjusted by simply increasing or decreasing the number of micro-channels for regulation, and can avoid 'amplification effect' generated in similar industrial production.

A rapid preparation method of crystal mixed and conveniently doped micropore-meso pore structure titania and the former body of the micropore-meso pore structure titania with the advantages of easy material acquisition, simple and simple and easy preparation condition and technics control and the pore structure can be adjusted in the range of the micropore and the meso pore. The present invention is characterized in that the alkali metal titanate is selected as material to react in a wet atmosphere with a temperature of 20 to 250 degrees and a humidity of 2 to 100 percent for 0.5 to 72 hours, then washed by water or acid solution and finally roasted by air or heatedly treated by solvent. Compared with the prior work, the present invention has the advantages of short reaction time, low preparation cost, easy structure control and easy scale manufacture, etc. The most probable pore size of the micropore-meso pore structure titania and the the former body of the micropore-meso pore structure titania is 1 to 20nm, the pore volume is 0.05 to 0.40.4cm³/g and the specific surface area is is more than 30m²/g.

Preparation and an application method of a graphene-coated porous silicon composite anode material belong to the field of electrode material preparation. According to the preparation, aluminium-silicon, which is used as a raw material, successively undergoes smelting, mechanical milling and chemical etching to prepare porous silicon; and then the porous silicon, graphene oxide and a carbon source undergo ball milling, spray drying and high-temperature pyrolysis to form a graphene-coated porous silicon composite material. Mass percent of silicon in the prepared porous silicon material is 20-80%; mass percent of metal impurities is 20-80%; particle size distribution is 10 nm- 10 microns; pore size distribution is 1-1000 nm; and porosity is 1-90%. According to the obtained graphene-coated porous silicon composite material, particle size is 1-100 microns, the shape is spherical, particle distribution is uniform, and morphology is consistent. When the material is applied to a lithium ion battery anode material, volume expansion of silicon alloying can be effectively prevented, and initial charge-discharge efficiency, theoretical specific capacity, cycle performance and the like are enhanced. The material of the invention is an ideal anode material in the field of lithium ion battery. The preparation has advantages of simple process, low energy consumption, low cost, good reappearance and high yield.

The invention belongs to the technical field of antifouling material processing and relates to a method for preparing an antifouling material with surface of spherically raised microstructure which is formed by direct film forming. The antifouling material prevents marine growth from adhering to the surfaces of the ship and marine structures under marine environment. The method is characterized by first utilizing hydrogen-containing silicone oil and allyl methacrylate for hydrosilylation to synthesize a silicone component containing polymerizable double bonds, carrying out free radical copolymerization on the silicone component and acrylonitrile and acrylate monomers to form acrylate resin mixed liquor hinged with silicone gel particles, mixing the mixed liquor with resins and then coating films, thus obtaining the antifouling material. The mixed resin material has the characteristic of low surface energy. The characteristic of spherically raised microstructure is formed, thus improving the hydrophobic property of the antifouling material, so that the antifouling material prevents marine organisms from being contaminated. With the hydrophobic property being improved, the antifouling material reduces the possibility of organism adhesion, has no devastating impacts on the environment and has good application prospect, reduced surface energy, strong capability of preventing adhesion of diatom, simple and easily controlled preparation process and low cost.

The invention relates to a catalyst which is relevant to zinc and titanium and a chemical method for preparing the catalyst. The zinc titanate micro-nano photocatalysis material has a spheroid structure with a plurality of protrusions. The preparation method of the zinc titanate micro-nano photocatalysis material comprises the following steps of: mixing uniform concentrated ammonia water suspension A of TiO2; slowly adding a zinc salt solution or ZnO powder into the suspension A in the titanium/zinc molar ratio of 1:1 to obtain uniform suspension B; processing the suspension B at high temperature and high pressure and then centrifugally washing the suspension B with deionized water many times to obtain a precursor C; drying the precursor C, burning at high temperature, and finally ball-milling. The prepared material has high specific surface area which reaches 160.6m2/g and has stronger visible light photocatalysis performance. The preparation method has low production cost and is suitable for scale industrial production.

The invention provides an RAFT (Reversible Addition-Fragmentation chain Transfer) reaction reagent based on a low molecular weight carbon dioxide copolymer and a preparation method of the RAFT reaction reagent, wherein the RAFT reaction reagent is a dithioester end capped low molecular weight carbon dioxide copolymer. The preparation method comprises the following steps of: subjecting a low molecular weight carbon dioxide polymerization product with terminal hydroxyl and halogen acyl halide to reaction at low temperature through a molecular design by utilizing a low molecular weight product generated through polymerization reaction between carbon dioxide and an epoxy compound, and separating and purifying a product to obtain halogen atom end capped low molecular weight carbon dioxide copolymer resin; and dissolving a halogen atom end capped low molecular weight carbon dioxide copolymer into a dichloromethane solution, adding alkyl xanthate at the room temperature, and reacting to finally obtain the RAFT reaction reagent based on the low molecular weight carbon dioxide copolymer. By using the RAFT reaction reagent, the low molecular weight carbon dioxide copolymer can be effectively utilized, and the emission of carbon dioxide as greenhouse gas can be reduced; and the preparation method and process are simple and easy to control.

The invention relates to a rheinheimera aquimaris strain QSI02 from ocean sludge and the application of the rheinheimera aquimaris strain QSI02 to the aspect of bacterial quorum sensing inhabiting and screening. The strain is preserved in China Center for Type Culture Collection on April 23rd, 2015, and the preservation serial number is CCTCC No: M2015245. The fact that the Rheinheimera type strain has the bacterial quorum sensing inhabiting activity is reported for the first time. A metabolite prepared through a fermentation liquor of the strain has the double inhibiting functions on chromobacterium violaceum and pseudomonas aeruginosa quorum sensing system and does not have the double inhibiting functions on generation of screening model chromobacterium violaceum CV026 within an effective concentration range. A strain extract can remarkably lower the yield of purpurin of chromobacterium violaceum and the swarming motility of pseudomonas aeruginosa and weaken the drug resistance of pathogenic bacterium, and therefore the rheinheimera aquimaris strain QSI02 has broad application prospects on the aspects of solving a bacterial drug resistance problem and researching and developing novel antibacterial agents.

The invention discloses a vertically oriented carbon nanotube array and graphene composite film material and a preparation method thereof. The vertically oriented carbon nanotube array and graphene composite film material provided by the invention includes graphene and vertically oriented carbon nanotube arrays uniformly distributed therein. The preparation method includes: making graphene oxide into a solution to fill vertically oriented carbon nanotube arrays subjected to graphic and densification processing, and reducing graphene oxide at high temperature, thus obtaining the vertically oriented carbon nanotube array and graphene composite structure film. Specifically, the oriented carbon nanotube arrays can provide extra longitudinal heat conduction path to the composite film, while graphene can effectively fill the gaps among the vertically oriented carbon nanotube arrays subjected to graphic and densification processing to provide a transverse heat conduction path. The characteristics of the vertically oriented carbon nanotube arrays and graphene material are utilized for complementation, the transverse and longitudinal heat conduction performance of an effective thermal interface material can be effectively improved, and the composite film material is applicable to multiple electronic device heat dissipation fields.

The invention discloses a preparation method of a g-C3N4 quantum dot and Ag quantum dot sensitization BiVO4 photocatalyst. The method includes the following steps that 1, a leaf-shaped BiVO4 nanostructure is prepared; 2, Ag quantum dots adhere to the leaf-shaped BiVO4 nanostructure; 3, g-C3N4 quantum dots are prepared; 4, the leaf-shaped g-C3N4 quantum dot and Ag quantum dot sensitization BiVO4 photocatalyst is prepared. According to the preparation method, the preparation process is simple and easy to control, operation is convenient, cost is low, and the product is high in visible-light catalytic activity, so that the method has broad development prospects in the fields of preparation and application of composite nanomaterials.

The invention discloses an easy-control technology for preparing biomass skeleton carbon of a micropore-mesopore structure and with a high specific surface area. The easy-control technology is characterized by comprising the steps: utilizing straws as a raw material, spraying a 50 wt% to 85 wt% potassium salt solution to the broken and dried straws, reacting for 1 to 4 hours under the 600 to 1,000DEG C nitrogen atmosphere and performing high temperature carbonization; keeping the carbonized straw carbon under the 280 to 350 DEG C air atmosphere warm for 1 to 7 hours, adjusting the potassium salt concentration and a reaction temperature and utilizing an activating technology of utilizing a sub-molten salt method to low temperature etch and peel natural biomass to prepare the biomass skeleton carbon. The specific surface area of the biomass skeleton carbon is 500 to 3,000 m<2>/g, and the most probable pore size is 1 to 20 nm. The technology disclosed by the invention has the characteristics of adjustable pore diameters in a micropore and mesopore range, no corrosion, greenness, low cost, simple and easy-control preparation conditions and technologies, wide raw material sources, favorability for scale production and application to the fields of high-efficiency adsorption, catalysis, energy storage and the like.

The invention provides a TiO2 nano-array film and a preparation method thereof. The preparation method includes the following steps: putting a chemically polished metal titanium foil (20*20mm<2>) intoan 80mL reaction kettle; adding sodium chloride (NaCl) into deionized water, stirring the deionized water until the sodium chloride is completely dissolved, adding hydrogen peroxide (H2O2), and continuing to stir for 30 minutes; transferring the mixed solution into the reaction kettle, and performing hydrothermal reaction at 140 DEG C for 6 hours; taking out the titanium foil after the reaction kettle is cooled to room temperature, flushing the surface of the titanium foil by the deionized water, and drying the titanium foil in an oven; subjecting the dried titanium foil to heat treatment ina muffle furnace at 450 DEG C for 2 hours to obtain the TiO2 nano-array film. The surface of the prepared TiO2 nano-array film is composed of nano-sheets perpendicular to a substrate, and the preparation process is simple and easy to control.

The invention relates to graphene oxide and a preparation method and application thereof. The method for preparing the graphene oxide comprises the following steps: (1) opening a reactor, sequentially adding 220-240g of concentrated nitric acid, 15-25g of graphite scales and 10-26g of potassium permanganate into the reactor, and stirring and reacting the various components; (2) heating the reactor to the temperature of 50 DEG C, adding 410-460g of water, 4-13g of sodium hypochlorite and 5-8g of hydrogen peroxide, and reacting; (3) cooling, and centrifuging the various components in the reactor; and (4) collecting the precipitate, cleaning the precipitate by using water, and adding the precipitate into water; performing ultrasonic treatment under the conditions of the ultrasonic power of 400-700W and the ultrasonic time of 40 minutes, thereby obtaining the graphene oxide after the ultrasonic treatment. The method for preparing the graphene oxide disclosed by the invention is simple in process and controllable in process.

The invention discloses Oceanobacillus sp. XC22919 and application in preparation of a quorum sensing bacteriostatic agent. Fermentation culture conditions of the Oceanobacillus sp. XC22919 are simple, the preparation technological process of active secondary metabolites is simple and easy to control, prepared metabolites have the advantages of obviously inhibiting bacterial quorum sensing activity and the like, and the optimal effective concentration of quorum sensing inhibition, namely, the quorum sensing inhibition activity maximum concentration within the minimum inhibitory concentration range of chromobacterium violaceum is 0.15 mg/ml.

The invention provides a nano filming plugging agent for a drilling fluid. The nano filming plugging agent comprises the following components: silicon oxide, polyurethane granules, a dispersant and analcohol. By controlling proportions and preparation processes of raw materials, the prepared nano filming plugging agent for the drilling fluid is an odorless white liquid, the density is 1.05g/cm<3>, the granularity of solid particles is 50-400nm, the nano filming plugging agent for the drilling fluid is compressed in the surface of a wall well or microcracks of mud shale to form a semi-permeable isolation film, that is, a complete protection layer is formed on the wall well, fluids can be prevented from entering a stratum, effective pressure can be increased, ineffective pressure can be reduced, a wall well stabilizing function can be effectively brought into play, the drilling fluid blocking capability can be improved, the filter loss of the drilling fluid can be reduced, the quality and plugging performance of mud cakes can be improved, the inhibition of the drilling fluid can be improved, a liquid in a shaft can be prevented from entering stratum pores and cracks, the probabilityof differential pressure adhesion and tool jamming can be reduced, and in addition, the nano filming plugging agent is simple, convenient and easy in control of preparation processes, convenient andrapid to use, and high in popularization and application value.

The invention discloses a simple preparation method of self-assembled micro-nano structural BiVO4 microspheres. The simple preparation method includes the steps of adding bismuth nitrate into glacialacetic acid with stirring until dissolving completely to obtain a solution A; adding sodium vanadate into deionized water with stirring until dissolving completely, adding glacial acetic acid, continuously stirring for 30 minutes to obtain a solution B; adding the solution B dropwise into the solution A, continuously stirring for 30 minutes to obtain a mixed solution, transferring the mixed solution into a 100mL reaction kettle, performing hydrothermal reaction at the temperature of 140 DEG C for 6 hours; subjecting reaction products to centrifugal separation after the reaction kettle is cooled to the room temperature, washing the separated products three times by deionized water and absolute ethyl alcohol, and them drying; placing the dried powder in a muffle furnace, holding the temperature of 400 DEG C for 2 hours so as to obtain the micro-nano structural BiVO4 microspheres.

The invention provides a clean production method of hydrocalumite. The method includes the following steps that first, aluminum in raw material bauxite is completely dissolved out through caustic soda with the mass fraction of 25-32% to obtain intermediate product sodium aluminate; then, lime milk and sodium carbonate are added, wherein the ratio of the amount of substance of lime milk to the amount of substance of sodium carbonate to the amount of substance of sodium aluminate is (3-5):(1-3):1; the mixture is stirred at room temperature and then transferred into a high-pressure reactor to be subjected to heat preservation aging for 6-24 h at 90-200 DEG C; supernatant liquid is poured after the reaction is finished, and suction filtration is performed after a product is rinsed; finally, a filter cake is dried. According to the method, the unique by-product which is caustic soda with great value can be reused in the dissolution working stage of aluminum oxide production, so that the by-product is completely utilized, wastewater and other pollutants generated in production are avoided, the production cost is lowered, and meanwhile the environment is greatly protected.

The invention relates to the field of material science, and provides an N-type copper-doped trimagnesium diantimonide alloy thermoelectric material and a preparation method thereof. The chemical general formula of the N-type copper-doped trimagnesium diantimonide alloy thermoelectric material is Mg<3.4>Sb<1.5>Bi<0.49>Te<0.01>+xCu, x is an actual component of a doped element Cu, and x is greater than or equal to 0.001 and less than or equal to 0.006. According to the preparation method, an inert atmosphere ball milling method is adopted for preparing a powder sample, a discharge plasma sintering method is adopted for preparing a block sample, electrons are introduced through Cu doping, cooperative regulation and control over the electrical conductivity and the thermal conductivity are achieved, and the highest thermoelectric optimal zT of the prepared N-type copper-doped trimagnesium diantimonide alloy reaches 1.62. The method provided by the invention is simple to operate, can be suitable for other thermoelectric materials, and provides a new scheme for improving the thermoelectric figure of merit.

The invention discloses roller painting water paint and a preparation method and a use method thereof. The roller painting water paint is prepared from water-based propylene-modified alcohol resin, water-based alkyd resin, a cosolvent, a drier, a neutralizer, deionized water, a dispersing wetting agent, a defoaming agent, titanium dioxide, functional filler, a flash-rust inhibitor, a thickening agent and an anti-settling agent. the water-based resin system is selected, VOC is smaller than or equal to 70 g/L, and the paint is basically odorless, environmentally friendly and healthy; the water-based acrylic modified resin is selected, so that the paint film drying speed is high; magnesium lithium silicate is selected as an anti-settling agent and forms a card grid structure when being mixed with water, so that precipitation is prevented, and the uniformity of the water paint is ensured; EDW750, RM-8W and EDW720 thickeners are selected as thickeners with high-shear, medium-shear and low-shear effects, the paint film is smooth and free of roller marks under the condition that the paint film is not sagged by matching the thickeners, the decoration performance is ensured, and the roller painting water paint is simple and convenient in preparation process, easy to control and convenient and quick to use, and has relatively high practical production and application value.

A small sized injection molding machine by which a molded product can be produced with a desired level of precision with simple control. An injection molding machine with: a longitudinal injection cylinder to which stick-shaped molding materials are sequentially supplied in line from the upper side, the lower end of which is formed into a nozzle shape, and the lower side of which is constituted by a material having a good heat retaining property; a heater which heats the lower portion of the injection cylinder; and a pressing shaft which presses the stick-shaped molding materials downward. When the stick shaped-molding material located at the uppermost side is pressed by the pressing shaft, the molding material located at the lowermost side which has already been completely melted, is injected into a cavity, and the heat from the heater is transmitted to the die side through a nozzle touch portion.

The invention provides a hexagonal flaky titanyl oxalate photocatalyst and a preparation method thereof. The method comprises the following steps: adding titanium sulfate [Ti(SO4)2] into deionized water, stirring until the titanium sulfate [Ti(SO4)2] is completely dissolved, adding ammonium oxalate [(NH4.2C2O4 H2O] into the solution, stirring until the titanium sulfate [Ti(SO4)2] is completely dissolved, and a precursor solution is obtained; transferring the precursor solution into a 100mL reaction kettle, and carrying out hydrothermal reaction at a certain temperature to obtain a reaction product A; after the reaction is finished, and the reaction kettle is naturally cooled to room temperature, the obtained reaction product A is centrifugally separated and washed by deionized water and absolute ethyl alcohol respectively to obtain a reaction product B; and drying the reaction product B to obtain the hexagonal flaky titanyl oxalate photocatalyst powder. The hexagonal flaky titanyl oxalate photocatalyst prepared by the method has the particle diameter of 1.5-4 micrometers and the thickness of 0.6-1.5 micrometers, and has excellent ultraviolet light catalytic activity; and the surface (200) is the main photocatalytic activity surface of the hexagonal flaky titanyl oxalate photocatalyst.

The invention provides a TiO2 nanoparticle film and a preparation method thereof. The preparation method comprises the following steps: placing chemically-polished metal titanium foil (20*20 mm<2>) into a 80 mL reaction kettle; adding a morphological control agent into deionized water, carrying out stirring until completely dissolving the morphological control agent, then, adding hydrogen peroxide(H2O2), and carrying out stirring until completely dissolving hydrogen peroxide to obtain a mixed solution; transferring the mixed solution into a reaction kettle, and carrying out a hydrothermal reaction at 140-180 DEG C for 4-10 h; cooling the reaction kettle to the room temperature, then, taking out titanium foil, washing the surface of titanium foil by using deionized water, and then, placingtitanium foil into a drying oven for drying; and placing dried titanium foil into a muffle furnace, and carrying out thermal treatment at 400-500 DEG C for 2-4 h to obtain the TiO2 nanoparticle film.The surface of the TiO2 nanoparticle film prepared by using the preparation method is composed of nanoparticles shaped like rice grain, and a preparation process is simple and easy to control.