1271results about How to "The preparation process is environmentally friendly" patented technology

The invention belongs to the technical field of nanoporous material, namely carbon aerogel, and particularly relates to graphene oxide-crosslinked polyimide-based carbon aerogel and a preparation method thereof. The invention carbon aerogel is prepared by crosslinking polyamide acid aerogel by graphene oxide, and comprises the components of graphene oxide and one or more water-soluble polyimide precursor-polyamide acids. The preparation method comprises the following steps: mixing an aqueous graphene oxide solution with the water-soluble polyimide precursor-polyamide acid, and preparing graphene oxide/polyamide acid aerogel through sol-gel and freeze-drying processes; preparing the graphene/polyimide-based carbon aerogel through thermal imidization and high temperature carbonization. According to the preparation method, a toxic reagent formaldehyde is not used; the prepared carbon aerogel has a mesoporous, microporous and macroporous three-level three-dimensional network porous structure, high specific surface area, high conductivity and stable physical and chemical properties, and is an ideal electrode material for preparing a supercapacitor and other new energy devices and a high-performance adsorbent material.

The invention discloses a method for preparing a modified calcium sulfate whisker by using desulfurization gypsum, comprising the following steps of sieving, pulping, performing hydro-thermal reaction and whisker surface modification, dewatering and drying, wherein the reaction temperature ranges from 107 DEG C to 180 DEG C, the concentration of desulfurization gypsum and water is 5-33wt% and the drying temperature ranges from 100 DEG C to 300 DEG C, and a modifier which is 0.05-5% of the weight of desulfurization gypsum in the calcium sulfate whisker suspension formed in hydro-thermal reaction. The invention solves the problem that CaSO4.0.5H2O whisker is easy to hydrate in the drying process tocause fracture of the whisker and enhances the compatibility of the calcium sulfate whisker and the high polymer materials. The prepared modified calcium sulfate whisker has a diameter of 0.5-6 micrometers, a length of 30-300 micrometers and a diameter ratio of 15-115 and the contact angle of water on the surface of the modified calcium sulfate whisker ranges from 12 to 140 degrees. The invention has the advantages of good modified effect, simple process, low production cost, the use of the non-toxic modifier and environmental-friendly preparation process.

The invention relates to a preparation method of a nanometer carbon-based solid acid which adopts biomass as carbon source to prepare carbon precursor under the hydrothermal condition and performs sulfonation reaction to obtain the carbon-based solid acid. The method comprises the following steps: 1) adding biomass in water, stirring evenly to perform a reaction, standing at 120-200 DEG C to prepare a carbon material; 2) filtrating and washing the carbon material obtained in the step 1, drying at 25-120 DEG C to obtain the dried carbon material; 3) taking the dried carbon material obtained inthe step 2 to perform sulfonation reaction at 25-180 DEG C in the presence of sulfonating agent and obtain a carbon-based solid acid catalyst; and 4) washing the carbon-based solid acid catalyst withhot water and drying at 25-120 DEG C. The method of the invention can reduce the production cost of the solid acid and improve product performance. The prepared nanometer carbon-based solid acid can be applied to the reactions such as esterification, hydrolysis, hydration and the like.

The invention relates to a catalyst for preparing ethanol from acetic ester hydrogenation, a preparation method and an application thereof. The main catalytic components of the catalyst are copper or copper oxide with a content of 30 wt%-75 wt%; an auxiliary agent is one or more of La2O3, ZrO2, CeO2, Fe2O3, NiO, MgO, MnO, Al2O3 and K2O, with a content of 1wt%-40 wt%; a carrier is zinc oxide with a content of 20 wt%-65 wt%. In a relatively low hydrogen ester ratio and relatively large liquid hourly space velocity, the catalyst has a conversion rate of acetate larger than 99% and a selectivity of ethanol larger than 99%. Besides, the catalyst has good stability, can reduce cost greatly, and obtains higher production gains. The catalyst is simple in preparation method; the raw materials of the catalyst have wide sources and low cost; and the preparation process of the catalyst is environment-friendly, and is suitable for industrialized production.

The invention discloses a novel C3N4/ZnO/Fe2O3 composite photocatalyst and a preparation method thereof. The method comprises the following steps: preparing a carbon nitride (C3N4) catalyst and a ZnO/Fe2O3 catalyst, then mixing according to the proportion, grinding and preparing the C3N4/ZnO/Fe2O3 composite photocatalyst. The novel C3N4/ZnO/Fe2O3 composite photocatalyst has the advantages that the photocatalytic efficiency is high, photocatalysis can be carried out in the range of ultraviolet band and visible light wavelength, the application range is wider, high-efficiency degradation can be carried out on wastewater, especially pollutants in the dye wastewater, the degradation is thorough and the used time is short; the method is simple in operation, mild in reaction condition, does not use toxic and harmful substances as materials, and is green and environment-friendly, thus avoiding secondary pollution.

The invention relates to a PVA hydrogel-based photo-thermal evaporation material and preparation and application thereof. The preparation method comprises the following steps: step 1, respectively preparing an aqueous polyvinyl alcohol (PVA) solution, an aqueous nanometer photo-thermal material dispersion solution, an aqueous glutaraldehyde solution and a low-concentration hydrochloric acid solution; 2, fully mixing and stirring the aqueous PVA solution, the aqueous nanometer photo-thermal material dispersion solution, the aqueous glutaraldehyde solution and the low-concentration hydrochloricacid solution in the step 1 according to a certain sequence under a certain temperature condition; and 3, transferring the mixed and stirred product into a forming mold when the mixed and stirred product is not cured, and carrying out standing until a cross-linking reaction is complete, thereby obtaining the hydrogel material. The preparation method disclosed by the invention has the beneficial effects that preparation process is environment-friendly, pollution-free, simple and feasible; preparation cost is low; the obtained hydrogel can be used as an ideal photo-thermal evaporation and solarseawater desalination material; and the prepared hydrogel has high light absorption efficiency, photo-thermal conversion efficiency and evaporation efficiency, and can be applied to the field of solarseawater desalination.

The invention discloses a preparation method of a superfine nanometer lithium iron phosphate electrode material, comprising the following steps of: firstly, taking an iron source compound and a phosphorus source compound as raw materials to obtain nanometer ferrous phosphate as a precursor; and secondly, using the ferrous phosphate and the lithium source compound to prepare the superfine nano lithium iron phosphate electrode material. The preparation method of ferrous phosphate, disclosed by the invention, has a simple production process; the obtained nanometer ferrous phosphate can be used for preparing the high-purity superfine nanometer lithium iron phosphate; and the ferrous valence state is not changed when the ferrous phosphate is used for preparing the lithium iron phosphate, thus, no carbon source compound or reducing agent needs to to be added to change the iron valence state, and then the carbon-coated lithium iron phosphate or non-carbon-coated lithium iron phosphate can be directly prepared. The nanometer lithium iron phosphate manufactured by the nanometer ferrous phosphate precursor has excellent performance, good discharge capacity and voltage platform performance under high capability and high multiplying power, and long cycle life.

The invention relates to an oral capsule preparation of oxiracetam and a preparation method thereof. The oxiracetam capsule contains 80.0-85.5% by weight of oxiracetam, 9.7-15.2% by weight of xylitol and 4.8% by weight of an emollient, wherein the oxiracetam is in a crystal form. The oxiracetam in the crystal form is a good crystal with excellent mobility. Compared with the crystal form provided in the prior art, the oxiracetam in the crystal form has higher purity, less impurity, better quality stabilizer and better crystal form stability. The quality stability of the disclosed oxiracetam capsule is improved remarkably, the preparation process is simple, and the production cost is lowered.

The invention discloses a Pd nano-particle loaded ferronickel double hydroxide nanosheet array structure material, a preparation method and application thereof. The preparation method comprises the following steps: adding nickel salt, ferric salt, urea and quaternary ammonium salt into absolute methanol, ultrasonically dissolving the components, adding a palladium source solution, uniformly mixingthe components, transferring the mixed solution into a reaction kettle, obliquely placing foamed nickel into the mixed solution, carrying out solvothermal reaction, naturally cooling the reaction product to room temperature, and washing and drying the reaction product to obtain the Pd nanoparticle loaded NiFe LDH nanosheet array structure material. The material has the advantages of high activity, good durability, simple preparation process and low cost in alkaline electrolyte, shows excellent activity and stability for oxygen evolution reaction, hydrogen evolution reaction and total hydrolysis reaction, and has very high value in practical application of electro-catalytic water decomposition materials.

The invention discloses a zinc oxide pressure-sensitive resistor. The zinc oxide pressure-sensitive resistor comprises a zinc oxide pressure-sensitive ceramic substrate, electrode layers and electrode leads, wherein the electrode layers are arranged on the upper surface and the lower surface of the zinc oxide pressure-sensitive ceramic substrate respectively; the electrode leads are arranged on the electrode layers respectively. The zinc oxide pressure-sensitive resistor is characterized in that each electrode layer comprises a bottom transition layer which is used for improving bonding force between the zinc oxide pressure-sensitive ceramic substrate and the corresponding electrode layer and reducing contact resistance. Therefore, the electrode layers and the zinc oxide pressure-sensitive ceramic substrate are firmly bonded, and the self through-current capability of the electrode layers is improved. Furthermore, the curved electrode leads are capable of uniformly distributing current on the electrode layers. The surge impact resistance capacity of the zinc oxide pressure-sensitive resistor is improved. The whole preparation process has an environment protection effect, and can reduce over 45 percent of consumed energy and save over 60 percent of production costs compared with the prior art.

The invention provides a preparation method of a superabsorbent resin used for a high-molecular gel extinguishing agent. The preparation method comprises: mixing acrylic acid and a sodium carbonate aqueous solution to prepare a neutralization solution; successively adding a cross-linking agent, an initiator and an adhesion promoter into the neutralization solution to prepare a polymerization solution; performing polymerization to prepare the superabsorbent resin; and cutting into particles with a diameter of 10-20 mm to further prepare superabsorbent resin particles with a particle size of 40-150 meshes. The preparation method is simple, and the superabsorbent resin prepared by the method is convenient to used and excellent in fire extinguishing effect.

The invention discloses a celluloid substituted material for table tennis and a manufacturing method. The material is very close to the celluloid in mechanical and processing properties and can be used for producing table tennis instead of celluloid. The main component of the material is cellulose acetate, and the auxiliary materials are a plasticizer, a reinforced material and pigment. The manufacturing method of the material is as follows: the raw materials are subject to high speed mixing and then extruded into pieces by a double screw extruder and a hanger-shaped handpiece, the thickness is adjusted by a three-roller calendar, and the pieces are subject to cooling and drawing treatments and then cut into sheets according with certain length and width production requirements of table tennis. The celluloid substituted material for table tennis is safe and environmental-friendly and is very close to the celluloid in mechanical and processing properties; and meanwhile the manufacturing method uses standard general equipment, so the maintenance and replacement of the equipment are very easy, and the manufacturing process can be ensured to efficiently perform at a high speed.

The invention discloses a preparation method of a catalyst for preparing propylene by virtue of propane dehydrogenation. The catalyst comprises an aluminum oxide carrier and active components with the following contents in percentage by mass calculated based on the carrier: 1-3% of calcium silicate salt, 1-3% of cerium oxide, 0.1-2.0% of a platinum group metal, 0.5-5.0% of potassium, 0.2-5.0% of cerium or samarium, 0.3-10% of halogen, 1-5% of a pore forming agent and the balance of impurities, wherein the molar ratio of cerium or samarium to the platinum group metal is 7:8; the platinum group metal is platinum; and halogen is chlorine. The preparation method comprises the following steps: soaking, drying and roasting the aluminum oxide carrier by using a soluble compound solution of cerium or samarium and a calcium silicate salt solution, then soaking, drying and roasting by using a solution containing compounds of the platinum group metal and hydrogen halide, and then soaking, drying and roasting by using a potassium salt solution; and then mixing cerium oxide and the pore forming agent with corresponding amounts, and roasting for 3 hours at 600 DEG C to obtain the catalyst for preparing propylene by virtue of propane dehydrogenation.

The invention discloses a double metal loaded sodium alginate/carboxymethylcellulose double-functional microballoon adsorbing material and a preparation method thereof. The method comprises the following steps: dissolving sodium alginate and carboxymethylcellulose at a mass ratio of (5-20) to 1 in deionized water, and stirring so as to obtain 1-3wt% compound colloidal sol; electronically spraying the compound colloidal sol into a receiving device containing a 1-20wt% metal ion solution by using an electronic spraying device, stirring, and filtering to obtain metal ion doped gel microballoons; and leaching the gel microballoons, then soaking the leached gel microballoons in a 5-25wt% aluminium chloride solution, stirring to obtain a mixture, adding 0.1-3 parts by volume of a cross-linking agent into the mixture, stirring, filtering, leaching and stoving so as to obtain the double metal loaded sodium alginate/carboxymethylcellulose double-functional microballoon adsorbing material. The preparation method has the characteristics of being simple, low in cost, environmentally friendly, and the like; the material prepared by adopting the method disclosed by the invention has the good application prospect in the aspects of water treatment and the like in fields of chemical engineering, agriculture, environment protection and the like.

The invention belongs to the field of polymer materials and batteries and particularly relates to a water-soluble polymer material gel polymer electrolyte and a preparation method thereof, and the invention also relates to the application of the gel polymer electrolyte in a primary or secondary electrochemical energy storage system. The gel polymer electrolyte is composed of a polymer film and a liquid electrolyte. The invention relates to the preparation method of the gel polymer electrolyte, and the method has a simple preparation process and low cost, and the preparation process is environment-friendly. The prepared gel polymer electrolyte has the advantages of high conductivity, wide electrochemical window, high lithium-ion migration number and good compatibility with electrode materials, the growth of metal dendrites can be effectively inhibited, and the cycle stability and rate performance of a battery and a capacitor can be significantly improved. The gel polymer electrolyte canbe used in the primary or secondary electrochemical energy storage system with high energy density, large capacity and high safety.

The invention discloses a ferroferric oxide porous ball having a micro-nano structure, and a preparation method of the ferroferric oxide porous ball. The ferroferric oxide porous ball having the micro-nano structure is prepared by annealing a ferrous carbonate porous ball having the micro-nano structure under the atmosphere of argon; the ferrous carbonate porous ball having the micro-nano structure is prepared by mixing ferric trichloride, urea and ascorbic acid; absorption and reduction of the synthesized ferroferric oxide porous ball having the micro-nano structure to heavy metal hexavalent chromium ion are tested. During preparation of ferrous carbonate by a hydrothermal process, a dispersing agent and a surfactant are not required; and substances such as a template are absent, so the ferroferric oxide porous ball having the micro-nano structure is environment-friendly, and aftertreatment is convenient; moreover, the reaction temperature is low and the process is simple; and due to a porous structure, the ferroferric oxide porous ball having the micro-nano structure prepared by the method has high specific surface and high activity of the nano structure, and can prevent gathering of particles effectively.

The invention relates to an anode catalyst used for a water electrolysis device of solid polymer electrolyte. The molecular formula of the catalyst is IrxRu1-xMyOz, wherein x is more than 0 and not more than 1, y is more than 0 and not more than 0.3, z is more than 1.5 and not more than 2.9, and M is one or more of such transition metals as Mo, W and Cr. In terms of the gross weight of the catalyst, the weight ratio of M in the catalyst is less than 10wt%. The required catalyst is characterized in that addition of the third component (or the fourth component) reduces the microcrystal grains of the catalyst, enlarges the specific surface area of the catalyst and improves the catalytic activity of the catalyst. The catalyst has lower overpotential and long life when serving as the anode catalyst in an SPE water electrolysis cell. The catalyst is used for the electrodes for oxygen evolution of the SPE water electrolysis cell, catalyst-membrane assemblies (CCM), membrane-electrode assemblies (MEA), regenerative fuel cells (RFC) and sensors.

The invention discloses an MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst as well as a preparation method and application thereof. The MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst comprises carbonate type magnesium-zinc-chromium hydrotalcite and titanium dioxide which is loaded on the carbonate type magnesium-zinc-chromium hydrotalcite. The preparation method for the MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst comprises the following steps: carrying out coprecipitation reaction by taking hydrochlorides of magnesium, zinc and chromium (III) as well as sodium hydroxide, anhydrous sodium carbonate and titanium dioxide as raw materials; and then, carrying out hydrothermal crystallization treatment. The MgZnCr-TiO2 hydrotalcite visible-light-induced photocatalyst disclosed by the invention has the advantages of being great in specific surface area, great in adsorbing capacity, good in absorption of visible light, and the like, can be widely used for photocatalytic degradation of dye wastewater, has very good adsorption capacity and photocatalytic degradation capacity, can completely remove pollutants, and is relatively good in reutilization.

The invention discloses a preparation method of a carbon fiber/toughened epoxy resin prepreg for a non-autoclave vacuum bag forming process. According to the method, the dissolution degree and the particle size of a curing agent and a toughening agent in epoxy resin are controlled by controlling a resin formula, the particle sizes of the curing agent and the toughening agent and process conditionsfor resin system configuration, and meanwhile, two modification effects are achieved: 1, the resin system is toughened; and 2, the requirements of a non-autoclave process on the viscosity of the resin in the prepreg and a room-temperature storage period are met. The prepared epoxy resin system is prepared into a rubber film, the carbon fiber/epoxy resin prepreg is further prepared by adopting a rubber film calendering method, and the semi-impregnated prepreg (unsaturated impregnated prepreg) is obtained by controlling the pressure and temperature during compounding of the rubber film and carbon fibers.