718results about How to "Strong environmental protection" patented technology

The invention provides a steel plate having low-temperature toughness, high tensile strength and low yield ratio, as well as a method for making the same. By combining simple combination design of alloying elements with optimized TMCP process, the method successfully solves the problem that low-temperature impact toughness and low yield ratio are in mutual conflict and difficult to reconcile in composition design and process design, which reduces the amount of steel material, saves cost, lightens the dead weight of a steel structure, increases stability and safety, and more importantly, improves the safety, stability and seismic damage resistance of the steel structure. The steel plate can be widely applied to large-scale high-rise building structures, bridge structures, offshore oil production platform structures, low temperature pressure vessels and large-scale ship structures.

The invention discloses ultra-low temperature steel in great heat input welding and a manufacturing method of the steel. The steel disclosed by the invention comprises the following components in percent by weight: 0.040-0.090% of C, less than or equal to 0.15% of Si, 1.10-1.50% of Mn, less than or equal to 0.013% of P, less than or equal to 0.0020% of S, 0.10-0.30% of Cu, 0.05-0.20% of Ni, 0.008-0.020% of Nb, less than or equal to 0.010% of Als, 0.008-0.013% of Ti, 0.0035-0.0065% of N, 0.001-0.004% of Ca, 0.0008-0.0020% of B and the balance of Fe and inevitable impurities. By adopting the simple combined design of alloy elements in the steel disclosed by the invention, the TMCP (Thermal Mechanical Control Processing) technology is optimized without the requirement of adding a great number of noble elements such as Ni and Cu, the excellent patent steel plate low-temperature tenacity is acquired and simultaneously the low-temperature tenacity of the HAZ (Heat Affected Zone) during large line energy welding is also excellent; and the uniform and excellent mechanical property, good welding property and marine atmosphere corrosion resistance are acquired, so that the steel disclosed by the invention is specially applicable to wind tower structures on the sea, low-temperature pressure vessels, ocean platforms and bridges.

The invention discloses a preparation method of a graphene-carbon nanotube-nano tin dioxide three-dimensional composite material, which comprises the following steps: (a) by using deionized water as a solvent, sequentially adding graphene oxide, stannous dichloride and multiwall carbon nanotubes as solutes, and mixing; (b) performing ultrasonic reaction on the mixed solution at 25-40 DEG C under the ultrasonic power of 100-300W for 1-2 hours; and (c) transferring the solution subjected to ultrasonic reaction into a hydrothermal kettle, performing hydrothermal treatment at 120-300 DEG C for 6-72 hours, and slowly cooling to room temperature, thereby obtaining the three-dimensional-structure graphene-carbon nanotube-nano tin dioxide composite material product. The invention also discloses a corresponding product and application thereof. The method disclosed by the invention can be used for preparing the three-dimensional-structure graphene composite material in an economic environment-friendly and convenient-operation mode; and the graphene-carbon nanotube-nano tin dioxide three-dimensional composite material has the characteristics of high specific surface area, porousness, light weight, long cycle life and the like.

The invention provides a construction device and construction method for a stirring and spraying expanded reinforcement pile. The construction device is characterized in that a drill pipe is formed by coaxially overlapping an outer pipe body and an inner pipe body in a sleeving mode and provided with a rotary power mechanism, a lifting device and a variable-diameter telescopic stirring arm; the inner pipe body is provided with a spiral drill bit and a spraying nozzle, and high-pressure ejection, forced stirring, improvement on the drilling speed and adjustment of the specifications of a pile body and an expanded body are realized through the operations of arm folding, arm unfolding, rotating, high-pressure grouting and the like. The construction method is characterized in that the setting parameters and design scheme of the pile body and the expanded body of the reinforcement pile are designed in advance. The method includes the particular construction steps that (1) pile positions are aligned; (2) the expanded body and the pile body of the reinforcement pile are constructed in a mode A (from top to bottom) or mode B (from bottom to top) according to the advanced design; (3) the stirring and spraying expanded reinforcement pile which accords with the advanced design and is provided with the expanded body is formed; and (4) subsequent construction is carried out through multiple methods and includes manufacturing of a reinforcement body pile body and pile end carriers and laying of a cushion layer.

The electroplating sludge treating and utilizing process includes the following steps: 1. adding alkali to stoved electroplating sludge, roasting, leaching out soluble metal in dilute alkali solution, and filtering to obtain alkali leached slag and alkali leached liquid; 2. adding acid to the alkali leached liquid, filtering to obtain hydrolyzed slag and hydrolyzed liquid, and preparing bichromate with the hydrolyzed liquid; and 3. dissolving the alkali leached slag in acid solution, filtering, electrodepositing the filtrate and filtering to obtain electrodeposited solution, depurating the electrodeposited solution and crystallizing to obtain nickel salt. The process has low power consumption and low cost, and can convert most of Cr, Cu and Ni in electroplating sludge into bichromate, nickel salt, copper powder and other side product.

The invention discloses a preparation method of easy-dyeing microfiber leather.The preparation method comprises the steps that 1, sea-island fibers are spun; 2, a non-woven fabric is made from the sea-island fibers; 3, heat setting is conducted on the non-woven fabric; 4, a polyurethane sizing agent is impregnated and cured, and then semi-finished synthetic leather is prepared; 5, decrement is conducted on the unfigured sea-island fibers through a methylbenzene stripping technology or decrement is conducted on the figured sea-island fibers through an alkali decrement stripping technology, and superfine fiber synthetic leather can be prepared; 6, softening treatment and sueding treatment are conducted, and then synthetic leather to be dyed can be prepared after treatment is finished; 7, the synthetic leather to be dyed is dyed with dispersed dye liquid or cationic dye liquid, and after dyeing is finished, the easy-dyeing microfiber leather is obtained.The easy-dyeing microfiber leather product prepared through the method has the advantages of being high in fiber content, skeleton sense and environmental friendliness, excellent in drapability and high in dyeing fastness.

The invention discloses a geothermal type formaldehyde-removing solid wood composite floor and manufacturing method thereof and aims to increase the formaldehyde removing effect of the composite floor. The composite floor comprises floor base material. Rabbets are formed in four sections of the floor base material. The floor base material sequentially comprises a filling layer, a paint-preventing layer, a primer layer and a finishing coat layer from bottom to top. A waterproof layer is disposed at the bottom of the floor base material. The composite floor is characterized in that the finishing coat layer sequentially comprises a wear-resistant finish coating layer, a scratch-resistant finishing coat layer and a formaldehyde-removing finishing coat layer from the bottom to top. Common environment-friendly UV coatings are used on the wear-resistant finish coating layer and the scratch-resistant finishing coat layer. The geothermal type formaldehyde-removing solid wood composite floor conforms to national standards, and product quality is increased greatly.

Disclosed are chemical polish for copper and alloy surface treatment and a preparation method thereof. The chemical polish is prepared by mixing 15-55% of hydrogen peroxide, 10-20% of organic acid, 10-20% of inorganic acid, 0.5-5% of antioxidant inhibitor, 5-15% of alcohol ether, and the balance of water. The chemical polish for copper and alloy surface treatment has the advantages of easiness to produce and process, high environmental friendliness, convenience to store, low affection to human bodies, effectiveness in polishing, and high oxidation resistance.

The invention relates to the technical field of ink, in particular to an acid-and-alkali-resistant environment-friendly ink for an automotive windscreen.The acid-and-alkali-resistant environment-friendly ink is characterized by being prepared from, by mass, 50%-70% of lead-and-cadmium-free composite glass powder, 8%-20% of inorganic pigment, 20%-40% of varnish, 0.6%-1% of dispersing agent, 0.6%-1% of flatting agent and 0.3%-0.6% of thixotropic agent.The acid-and-alkali-resistant environment-friendly ink for the automotive windscreen is efficient and environmentally friendly, has excellent acid and alkali resistance and suitable sintering temperature, is good in water resistance, high in adhesive force and good in ultraviolet resistance, and has the quite low light transmissivity, and foreign-automobile-windscreen ink products can be replaced with the ink.

The invention discloses a preparation method of interior wall putty. The interior wall putty is composed of the following ingredients in parts by weight: 46-50 parts of diatomaceous earth, 10-12 parts of purified attapulgite, 3-5 parts of talcum powder, 14-16 parts of expanded corn starch, 5-8 parts of hydroxypropyl methyl cellulose, 1-3 parts of polyacrylamide and 5-7 parts of titanium dioxide. The preparation method comprises the following steps: S1. sequentially pouring the talcum powder, expanded corn starch and titanium dioxide into a stirrer to be mixed and stirred, and stirring for 5-10 minutes; S2. sequentially pouring the diatomaceous earth and the purified attapulgite into the mixture in the step S1, and stirring for 10-15 minutes; and S3. adding the polyacrylamide and hydroxypropyl methyl cellulose in the mixture in the step S2, stirring for 20-30 minutes, and then, sieving the mixture through a sieve of 250 meshes.

The invention relates to a cleaning agent for silicate products, and in particular relates to an oil stain cleaning agent. The oil stain cleaning agent consists of the following components in percentage by weight: 30-45% of sodium hypochlorite, 5-10% of calcium carbonate, 5-10% of propyl bromide, 5-15% of acetone, 2-8% of acetic ether, 10-20% of surfactant and the balance of de-ionized water. The cleaning agent, added with the sodium hypochlorite with cleaning and blanching functions as well as the propyl bromide, the calcium carbonate, the acetone, the acetic ether, the surfactant and the like with functions of removing stain, removing oil, penetrating and lubricating, can be used for enhancing bonding between the stain and chlorine atoms; the cleaning agent can be used for effectively cleaning water stain and oil stain of the silicate products, and is quite excellent in washing effect; meanwhile, the cleaning agent is strong in cleansing power and low in construction cost, and the cleaning agent, as a liquid preparation, is simple and convenient to use, thereby being a special oil stain cleaning agent for stones.

The invention discloses a high-suspension easy-to-biochemically treated wastewater treatment method, which is applied to the treatment of various kinds of high-concentration easy-to-biochemically treated organic wastewater. The method comprises the following steps of 1, collecting wastewater, and performing advanced solid-liquid separation in a dissolved air flotation way; 2, performing anaerobic decomposition on the separated wastewater by using anaerobic and facultative tanks; 3, causing the decomposed wastewater to enter an MBR (membrane biological reactor) process system; and 4, disinfecting and sterilizing effluent obtained by an MBR process to discharge water reaching standards by using sodium hypochlorite. According to the wastewater treatment method, high-concentration easy-to-biochemically treated wastewater can be effectively treated, the construction fund can be greatly saved, a small land is occupied, and the method is stable in running, low in cost and particularly suitable for industrial production.

The present invention provides a high flexibility epoxy resin composition, which can be used in the fields of electronic packaging materials and powder coating materials, and comprises, by mass, 30-50 parts of an epoxy resin, 1-30 parts of polyvinyl butyral (PVB), 3-10 parts of a curing agent, 0.05-0.3 part of a curing accelerator, and 30-60 parts of an inorganic filler. The epoxy resin has characteristics of excellent interpenetrating network structure and excellent flexibility, and can be used in the fields of electronic packaging materials and powder coating materials.

The present invention relates to method of producing active nutritious fertilizer with old domestic garbage as material. By means of composite bacteria preparation comprising azotobacteria, photosynthetic bacteria, yeast, lactic bacteria, functional bacillus and other micro aerobe or aerobe and earthworm, old domestic garbage is treated through once fermentation treatment to obtain the active nutritious fertilizer. The active nutritious fertilizer is harmless, and has water content less than 20 %, pH 7.5-8.5, total nitrogen not less than 0.3%, quick acting nitrogen not less than 0.04%, total phosphorus not less than 0.1%, total potassium not less than 0.2%, inorganic granularity small than 5 mm and total active beneficial bacteria number not less than 1x10<7> / g. The production process has short period and less produced marsh gas.

The invention discloses an environment-friendly reaction type polishing brightener composition and a preparation method and application thereof and belongs to the field of fine chemical engineering. The components of the environment-friendly reaction type polishing brightener composition comprises, by mass, 5%-10% of polishing agent, 3%-6% of alcohol amine, 3%-5% of complexing agent, 1%-4% of surface activating agent, 0.5%-2.0% of brightener, 0.1%-0.5% of thickening agent, 0.5%-2% of corrosion inhibitor, 1%-3% of pickling agent and 75%-85% of water. The environment-friendly reaction type polishing brightener composition prepared is an upgraded replacement product of a traditional brightener, the cleaning and brightening effects on a stainless steel material are obvious, no corrosion is caused to a base material, and the composition is environment-friendly.

The invention relates to the field of solid fuels, and discloses a novel solid regenerated fuel, which comprises solid wastes and additives, wherein the solid wastes have the heat value no more than 2,500Kcal / Kg and pollution factors less than 5. The raw materials are mainly the solid wastes with certain heat value and less pollution factors; according to the used solid wastes, the additives are selected; the prepared novel solid regenerated fuel has stable properties, is easy to store and transport, can be mixed with other fuels, generates a little ash after combustion, meets the combustion requirement of fuels, and ensures the heat value of more than 3,000Kcal / Kg; and waste gas generated after combustion can meet the integrated emission standard of air pollutants. The novel solid regenerated fuel has great environmental protection significance and energy conservation and emission reduction significance.

The invention relates to a medical environment-friendly sterilization ultrasound coupling agent and a preparation method thereof, wherein the ultrasound coupling agent comprises the components based on the parts by weight: 5-30 parts of corn starch, 2-2.5 parts of 30% of hydrogen peroxide, 0.04-0.08 part of ferrous sulphate, 2-2.5 parts of sodium hydroxide, 1.2-1.5 parts of sodium borate, 0.10-2.00 parts of iodine, 3.00-20.00 parts of fatty alcohol-polyoxyethylene ether, 0-1.00 part of potassium iodide, 0-1.00 part of potassium iodate, 1.00 part of glycerin, 0.20 part of citric acid and 60-78parts of water. When being used for ultrasonic detection, the ultrasound coupling agent ensures the detection image to be clear and the cross infection risk which is possibly caused by the ultrasonicdetection to be little, does not swell and corrode an ultrasonic probe, can be degraded so as to be free from environmental pollution, and has the characteristic of strong environmental conservation property. The ultrasound coupling agent prepared by the method has the advantages of wide source of raw materials, good environmental conservation property, low price, simple preparation working procedures and low equipment investment.

The invention provides a halogen-free non-phosphorization flame-retardant epoxy resin composition and a preparation method thereof. The preparation method comprises the following steps of: premixing the common epoxy resin, flame-retardant epoxy resin, a curing agent, a curing accelerator, a flame-retardant synergistic agent and an inorganic filler; melting, mixing and extruding; and crushing and sieving to prepare the halogen-free non-phosphorization flame-retardant epoxy resin composition. The flame-retardant epoxy resin composition does not contain harmful substances such as halogen, diantimony trioxide, phosphorus and the like, has excellent fire resistance which can reach UL94V-O grade flame-retardant standard and high electrical property, can be applied in the fields of electronic packaging and copper-clad laminate.

The invention discloses an alkalescent diatom ooze wall material and a preparation method thereof. The wall material comprises, by weight, 300 parts to 600 parts of diatom ooze of 200 meshes to 400 meshes, 200 parts to 500 parts of silica flour of 100 meshes to 200 meshes, 100 parts to 400 parts of wollastonite powder of 200 meshes to 400 meshes, 100 parts to 400 parts of bentonite of 200 meshes to 400 meshes, 200 parts to 500 parts of objective palygorskite of 200 meshes to 400 meshes, 20 parts to 50 parts of plant cellulose and 10 parts to 40 parts of nano polymers. The alkalescent diatom ooze wall material has weak alkalescent corrosion and a porous optical channel structure, the specific gravity of the material is smaller than that of water, the material is easy to suspend on the water surface, rays can be refracted inside the wall material, and the ray utilization rate is high. The invention further provides a preparation method of the alkalescent diatom ooze wall material, as the wallmaterial is alkalescent, and the stirring and blending is easy, the preparation method is simple.

The invention discloses a preparation method of 2,5-dichlorophenol and relates to the technical field of pesticide intermediate synthesis. The preparation method comprises the following steps: with p-dichlorobenzene as a start raw material, performing a Friedel-Crafts acylation reaction between the p-dichlorobenzene and acetyl chloride in the presence of aluminum trichloride to obtain 2,5-dichloroacetophenone; performing a Baeyer-Villiger oxidation reaction between the 2,5-dichloroacetophenone and a peroxide in the presence of a catalyst at room temperature to obtain 2,5-dichlorobenzene acetate; and performing a hydrolysis reaction between the 2,5-dichlorobenzene acetate and inorganic aqueous alkali in a reflux condition to obtain 2,5-dichlorophenol. The preparation method disclosed by the invention has the characteristics of simple synthesis process, short line, low production cost and high yield; and moreover, with less quantity of generated three wastes and high environmental protection property, the preparation method is more suitable for large-scale industrial production.

The invention discloses an environment-friendly defoaming agent which consists of the following components by weight: 20-80 parts of higher aliphatic alcohol, 1-10 parts of polyether modified silicone, 3-15 parts of a tween series emulsifier, 1-10 parts of a span series emulsifier, 5-20 parts of silicon dioxide and 100-500 parts of deionized water. The environment-friendly defoaming agent is prepared from the non-toxic and harmless raw materials; according to the formula, nano silicon dioxide is used as a carrier and an emulsification auxiliary ingredient, so that higher stability and higher reinforcement property can be achieved; under the dual action of the nano silicon dioxide, the stability and the foam suppression effect of the defoaming agent are higher and better.

The invention provides a preparation method of a special antibacterial paint for a hospital and relates to the preparation method of the antibacterial paint. The antibacterial paint is prepared from deionized water, hydroxyethyl cellulose, dispersing agents, wetting agents, mould inhibitors, pH regulators, defoaming agents, anti-freezing agents, titanium dioxide or precipitated barium sulphate, inorganic antibacterial materials, rheology modifying agents, kaolin, light calcium powder, film forming auxiliary agents, acrylic emulsion and alkali swelling thickening agents. The method comprises the following steps of: weighing raw materials; mixing and stirring the deionized water, the defoaming agents, the dispersing agents and the hydroxyethyl cellulose; adding the wetting agents, the mould inhibitors, the anti-freezing agents, the titanium dioxide or the precipitated barium sulphate, the rheology modifying agents, the kaolin, the light calcium powder and the alkali swelling thickening agents to be continuously stirred; then, adding the inorganic antibacterial materials, the acrylic emulsion and the pH regulators; stirring the materials; next, adding the film forming auxiliary agents; obtaining pulp after the stirring; and grinding the pulp to obtain the special antibacterial paint. The special antibacterial paint for the hospital has the excellent bloodstain resistance and contamination resistance performance, the advantages of strong-effect antibacterial and mould inhibition effects, environment friendliness and the like are also realized, the antibacterial performance is high, and the durability is good.

The invention provides an environment-friendly inorganic soil solidification additive which comprises, by mass, 15-65% of sulfate, 15-65% of halide salt, 11-40% of phosphate, 5-30% of silicate, 0-25% of carbonate, 0-18% of basic oxide and 0-10% of lignosulfonate. The environment-friendly inorganic soil solidification additive is characterized in that all components in soil directly or indirectly undergo soil particle surface chemical modification and modification of substances among soil particles, and generation of colloidal gel materials and generation of various materials of crystal structures are promoted. As time goes, hardened skeletons such as ettringite needle-shaped crystals and apatite crystals appear gradually in solidified soil, soil solidification compressive strength, hydrophobicity, water permeability, stability of heavy metal and other harmful materials and other physical and chemical solidification effects are good, and the environment-friendly inorganic soil solidification additive can adapt to various climates, geographies and soil properties and is high in compatibility and obvious in stabilization and solidification effect on heavy metal and other harmful materials.

The invention relates to a self-powered smart cup with temperature display. The self-powered smart cup comprises a cup cap and a cup body. An inner container is disposed inside the cup body, and an insulating layer is formed between the cup body and the inner container. The self-powered smart cup is characterized in that a flexible temperature-difference generating patch is closely adhered on the outer side wall of the inner container, a control circuit board is mounted in the insulating layer between the cup body and the inner container, a temperature sensor is mounted on the outer side of the bottom of the inner container, a temperature display screen is embedded in the side wall of the cup body, and the flexible temperature-difference generating patch, the temperature sensor and the temperature display screen are connected with the control circuit board through conductor wires. Besides, a thin-film touch switch is arranged on the inner side of the side wall of the cup body, and is connected with the control circuit board through a conductor wire; the cup cap is matched with a cup mouth on the upper portion of the cup body. The smart cup is free of power of batteries, is supplied with power by the aid of the temperature of hot water contained therein, and is environment friendly greatly. The smart cup is simple in structure and can be designed with different appearances with different materials according to different requirements.

The invention relates to a method for preparing an RPC (Reactive Powder Concrete) trench cover plate of a high-speed railway passenger-dedicated line. The method is characterized by comprising the following steps of: (1) preparing a mould; (2) preparing slurry, wherein the slurry comprises the following raw materials in parts by weight: 100 parts of silicate cement, 10 parts of siliceous dust, 110 parts of quartz sands, 10 parts of active mineral admixture, 35 parts of quartz powder, 2.5 parts of water reducing agent, 28 to 31 parts of water, and 0.2 part of polypropylene fibers, the silicate cement, the siliceous dust, the quartz sands, the active mineral admixture, the quartz powder and the polypropylene are stirred in a stirrer, the water reducing agent is dissolved with water, and the water reducing agent is added into the stirrer and the residual water is stirred in the stirrer to obtain the slurry; (3) shaking and molding; (4) initially setting; (5) demolding; and (6) maintaining to obtain the RPC trench cover plate of the high-speed railway passenger-dedicated line. By the method, the mechanical performance of the RPC trench cover plate can be improved, the anti-cracking and seepage-proofing performance and duration performance of the RPC trench cover plate can be reinforced, the production cost of the RPC trench cover plate can be reduced, and the preparation process is simple.

Disclosed is a morphology controllable nanometer CeO2 preparation method. Hexahydrate cerous nitrate and a citric acid are mixed to obtain a mixture, the mixture is stirred in a magnetic force heating stirrer, the potential of hydrogen (pH) of the mixture is adjusted to 2.0 to 2.5 by aqueous ammonia, the mixture is placed in water bath to be reacted and dried in an air-blowing drying oven, then the dried mixture is placed in a muffle furnace to be calcined at different temperatures from 200 DEG C to 700 DEG C to obtain a product, and the calcined product is ground in a agate mortar to obtain a faint yellow CeO2 powder. According to the method, grain growth kinetics and sol-gel method principles are utilized, the different calcination temperatures are controlled in the process of forming the material, so that the material can be synthesized at low temperature, the energy is saved, the agglomeration during material synthesizing is reduced, the production process is simplified, and the average particle diameter of the formed nanometer oxide ceric oxide particle is smaller with the increasing of the calcination temperature.

The invention discloses application of pilea cadierei in treating livestock and poultry breeding wastewater, belonging to wastewater treatment filed. In the invention, the characteristics that of pilea cadierei has cold resistance, does not fall leaves or wither in winter and can absorb and remove ammonia nitrogen, total nitrogen and other pollutants in livestock and poultry breeding wastewater is utilized, and the pilea cadierei is directly transplanted or inserted by cuttage in the environment of livestock and poultry breeding wastewater to absorb the pollutants of accumulated wastewater so as to purify the livestock and poultry breeding wastewater. The invention solves the problem that most of plants for purifying wastewater have poor purification effects in winter currently and also provides new types of plant resources for the treatment of livestock and poultry breeding wastewater pollution, brings new improvement and development space for the treatment of livestock and poultry breeding wastewater pollution by artificial wetland plants, and achieves obvious advantages in operation cost, operation maintenance, treatment effect, as well as brought economical benefits in landscape, environmental protection and medical application, compared with traditional plants for purifying wastewater.

The invention discloses a biodegradable polylactic acid agricultural mulching film and a processing technology thereof, and relates to the technical field of agricultural mulching films. The biodegradable polylactic acid agricultural mulching film is prepared from the following raw materials in parts by weight: 100-120 parts of polylactic resin, 15-30 parts of light calcium carbonate, 5-10 parts of polypropylene carbonate, 5-10 parts of carboxymethyl-beta-cyclodextrin, 1-5 parts of PEG-60 hydrogenated castor oil, 1-5 parts of hexakis(methoxymethyl)melamine, 1-5 parts of ultraviolet screening agent and 0.5-2 parts of antioxidant. According to the biodegradable polylactic acid agricultural mulching film and the processing technology thereof, the polylactic acid film is prepared by taking thepolylactic resin as a main material and co-taking a plurality of auxiliary materials, and the prepared polylactic acid film belongs to the biodegradable film and is non-toxic, harmless and strong inuse environmental protection property; and in addition, the usability is excellent, and the use requirement of the agricultural mulching film is met.

The invention discloses waterborne epoxy resin for stoving varnish. The waterborne epoxy resin is prepared from epoxy resin, acrylic acid, butyl acrylate, iso-octyl acrylate, hydroxyethyl acrylate, methyl methacrylate, styrene, benzoyl peroxide, ethylene glycol monobutyl ether, dimethylethanolamine and deionized water. The best raw material ratio is obtained through screening of a large number of experiments, the environmental friendliness is high, and epoxy resin can be dispersed into water; in the whole preparation technology, a large quantity of organic solvent can be prevented from being adopted, only a small quantity of environment-friendly solvent is adopted, deionized water is adopted for replacing the large quantity of organic solvent, the prepared water dispersion epoxy resin is low in VOC, the performance of the epoxy resin is the same as that of solvent type epoxy resin, and the waterborne epoxy resin has the excellent hardness, shock resistance and adhesive force and has the good technical effect.

The invention relates to the technical field of energy sources, in particular to a Brayton system and a flow for zero emission of carbon dioxide (CO2) by utilizing liquid hydrogen (LH2) condensation. The system is formed by coupling a semi-closed and regenerated Brayton cycle and a liquid hydrogen (LH2) gasification unit, the liquid hydrogen gasification unit is taken as a low-temperature cold source of the semi-closed and regenerated Brayton cycle so as to ensure that the condensation process of the semi-closed and regenerated Brayton cycle obtains low temperature far lower than ambient temperature, the Brayton cycle adopts a nitrogen working medium and hydrogen fuel, and no CO2 is produced during the combustion; therefore, the zero emission of various environment-harmful pollutions comprising the CO2 is realized under the condition of no need of additional energy consumption. At the same time, relative to the prior Brayton cycle with the nitrogen working medium which takes the environment as a cold source, the thermodynamic property of the Brayton system is greatly improved, so the Brayton system has good economical efficiency and broad engineering application prospect.