113results about How to "Guaranteed reactivity" patented technology

The invention relates to a preparation method of a para-aramid nanometer fiber composite lithium ion battery separator, and belongs to the technical field of a high polymer material. The preparation method comprises the steps of preparing para-aramid polymer paste, coating the para-aramid polymer paste on a surface of a base membrane by a coating method, and solidifying the coating film in coagulation bath comprising N-methly-2-pyrrolidone and water to obtain the para-aramid nanometer fiber composite lithium ion battery separator; and washing and drying the para-aramid nanometer fiber composite lithium ion battery separator to obtain a finished product of the para-aramid nanometer fiber composite lithium ion battery separator. Compared with the prior art, the preparation method has the advantages that a solvent and an energy source are saved, energy consumption is also reduced, and unfavorable influence of impurity on battery performance is prevented; and moreover, the preparation process is simple, and the high-temperature resistant performance of the separator is improved, the prepared separator has favorable ion conductivity and can obtain relatively good performance when used as the lithium ion battery separator.

The invention relates to a method of environment-friendly synthesis nanometer zero-valent iron-nickel bimetal materials. The method includes the following steps of weighing 20 g-60 g of green tea to be added into 1 liter of distilled water, heating the mixture for 40 min-60 min at the temperature of 60 DEG C-80 DEG C, cooling the mixture to the room temperature, and obtaining a green tea extracting solution by filtering the mixture; dissolving iron salt and nickel salt in the distilled water to prepare an iron-nickel mixed solution; adding the iron-nickel mixed solution into a three-opening flask, heating the solution in water bath at the temperature of 25 DEG C to 70 DEG C, stirring the solution for 10 min-60 min at the rate of 350 r / min, dropwise adding the green tea extracting solution in the stirring process, continuing to stir for 20 min, and obtaining environment-friendly synthesis nanometer zero-valent iron-nickel suspension liquid; and separating the suspension liquid through a suction filtration method, and drying obtained precipitates in a vacuum drying box for 12 h-48 h at the temperature of 40 DEG C-70 DEG C so that the environment-friendly synthesis nanometer zero-valent iron-nickel bimetal materials can be obtained. The preparation process is simple, the reaction condition is moderate, the cost is greatly reduced, and the method has the huge application and popularization potential in the field of chromium-contaminated soil and groundwater remediation.

The invention discloses a method for preparing nanometer aluminum composite powder coated with nitro-cotton. The method includes the steps of: dispersing nanometer aluminum powder into absolute ethyl alcohol; adding silane coupling agent with the weight accounting for 5-10% of that of the nanometer aluminum powder to obtain nanometer aluminum powder treated by the silane coupling agent; dissolving the nitro-cotton and plasticizer into ethyl acetate or acetone; dispersing the nanometer aluminum powder treated by the silane coupling agent into cyclohexane to form cyclohexane dispersing agent; adding nitro-cotton liquor into the cyclohexane dispersing agent and evenly mixing the nitro-cotton liquor; and performing filtering and vacuum drying to obtain the nanometer aluminum composite powder coated with the nitro-cotton, wherein the weight of the nitro-cotton is 0.04-0.15 time that of the aluminum powder, and the weight of the plasticizer accounts for 3-10% of that of the nitro-cotton. The nanometer aluminum powder is firstly treated by the silane coupling agent and then coated with the nitro-cotton, the surface of the nanometer aluminum powder is effectively coated with the nitro-cotton, the activity of the nanometer aluminum powder can be kept, and the oxidation resistance of the nanometer aluminum powder is improved.

A bimetal catalyst for degradating the CCl4, trichlorothene and tetrachloroethene is sewage within one hour is composed of the modified zeolite as carrier and the bimetal Fe-Ni in the mass ratio of (1-10): 100. Said bimetal Fe-Ni is prepared by using sodium dithionite as reducer to reduce the Ni ions on the surfaces of Fe filings.

The invention discloses a method for preparing a nitrogen-atom doped carbon nanomaterial. The method comprises the following steps: performing direct fluorination treatment on a carbon nanomaterial or derivatives thereof in an inert gas atmosphere by taking a fluorine gas mixture as a fluorination agent so as to obtain a fluorinated carbon nanomaterial; and performing high-temperature after-treatment on the obtained fluorinated carbon nanomaterial in an ammonia / argon mixed gas atmosphere, thereby obtaining the nitrogen doped carbon nanomaterial. With the adoption of a modification method of 'sequentially activating and doping' in the invention, an effective novel method for improving the nitrogen doping amount is explored in the field, and the obtained nitrogen doped carbon nanomaterial is high in nitrogen content, large in specific surface area, simple and feasible in process and low in cost and has excellent application prospects.

The invention belongs to the field of composite materials and discloses a magnesium based ferrous sulfide composite nanomaterial as well as a preparation method and application thereof. The preparation method comprises the steps: evenly dispersing magnesium based material powder into water to obtain a magnesium based material suspension, wherein a magnesium based material is at least one of magnesium oxide and magnesium hydroxide; then adding a ferrite water solution into the magnesium based material suspension, evenly mixing, dropwise adding a sodium sulfide water solution, reacting to obtainferrous sulfide and standing to obtain the magnesium based ferrous sulfide composite nanomaterial after reaction finishes. According to the preparation method disclosed by the invention, a nano ferrous sulfide material is loaded to the surface of the magnesium based material, and agglomeration of ferrous sulfide particles is inhibited to ensure reaction activity of the ferrous sulfide particles;the active surface of the magnesium based material can efficiently adsorb heavy metal, so that a utilization rate of the ferrous sulfide nanomaterial is improved; meanwhile, a weak-basicity material prepared from the magnesium based material is favorable for stable existence of the nano ferrous sulfide material, so that the composition material is not prone to metamorphosing and is easy to store.

The invention provides a selective hydrogenation method of alkyne and alkadiene in a C4 hydrocarbon material flow. The method provided by the invention comprises the following steps of: adding the C4 hydrocarbon material flow containing alkyne and / or alkadiene and hydrogen gas into a hydrogenation reactor which is filled with a load type palladium catalyst; carrying out the selective hydrogenation on the alkyne and / or alkadiene in the C4 hydrocarbon material flow to form olefin when an inlet temperature is in a range of 10-80 DEG C, a mol ratio of the hydrogen gas to the sum of the alkyne and the alkadiene is 1-10 and a reaction pressure is in a range of 0.1-4 Mpa, and removing the olefin, wherein the load type palladium catalyst comprises a carrier, palladium and selective modified components; testing the load type palladium catalyst by utilizing a carbon monoxide adsorption in-situ infrared spectroscopy at the temperature of 40 DEG C to obtain an area ratio of a bridge type absorption peak at the 1930-1990cm<-1> to a bridge type absorption peak at the 1870-1930cm<-1> in an obtained infrared spectrogram is less than 0.2, more preferably less than 0.15. The method provided by the invention has a high selectivity to the selective hydrogenation of the alkyne and the alkadiene in the C4 hydrocarbon material flow and can be operated for a long period.

The invention provides a selective hydrogenation method of alkyne in a C4 hydrocarbon stream. The selective hydrogenation method comprises the steps of introducing the C4 hydrocarbon stream containing alkyne together with hydrogen into a hydrocarbon reactor with a supported palladium catalyst, carrying out selective hydrocarbon on alkyne in the C4 hydrocarbon stream at the inlet temperature of 10-80 DEG C in a molar ratio of hydrogen to alkyne of 1-10 at the reaction pressure of 0.1-4MPa so as to form olefin / alkadiene, then removing alkyne, wherein the supported palladium catalyst comprises a carrier, palladium and a selectable modified component. In the invention, a carbon monoxide absorption in situ infrared spectroscopy is used so as to test olefin / alkadiene at the temperature of 40 DEG C, and in the obtained infrared spectrogram, the area ratio of bridge type absorption peak at the part of 1930-1990cm<-1> to bridge type absorption peak at the part of 1870-1930cm<-1> is less than 0.2, more preferably 0.15. The method has high selectivity on the selective hydrogenation of alkyne in the C4 hydrocarbon stream and can operate for a long period.

The invention provides a selective hydrogenation method of alkyne and dialkene in an alkene stream. The method comprises the steps that: an alkene stream containing alkyne and / or dialkene, and hydrogen are delivered into a hydrogenation reactor provided with a supported palladium catalyst; alkyne and / or dialkene in the alkene stream are hydrogenated into alkene under conditions of: a temperature in of 10 to 80 DEG C, a molar ratio of hydrogen to a total amount of alkyne and dialkene of 1 to 10, and a reaction pressure of 0.1 to 4 Mpa, such that alkyne and / or dialkene in the alkene stream are removed. The supported palladium catalyst comprises a carrier, palladium and optional modifying components. With a carbon monoxide adsorption in situ infrared spectroscopy method, the catalyst is tested under a temperature of 40 DEG C. In an obtained infrared spectrogram, an area ratio of an overhead absorption peak at a location of 1983 to 1990cm-1 to that at the location of 1870 to 1930cm-1 is lower than 0.2, and preferably 0.15. The method provides a high selectivity in the selective hydrogenation of alkyne and dialkene. The method can operate for a long period.

The invention relates to a magnesium oxide for high magnetic induction grain-oriented silicon steel, in particular to a low-hydration magnesium oxide coating for high magnetic induction grain-oriented silicon steel. The low-hydration magnesium oxide coating comprises the following components in parts by mass: 10-15 parts of special magnesium oxide, 0.5-1.5 parts of titanium dioxide, 0.001-0.005 part of a low-melting-point antimony compound, 0.001-0.005 part of a water repellent agent which is silicon micro powder, and 80-90 parts of deionized water. The components are mixed for 60-90 minutes at a stirring state of 1000-1500r / min, and then, the low-hydration magnesium oxide coating is prepared at a reaction temperature of 0-5 DEG C. According to the low-hydration magnesium oxide coating for high magnetic induction grain-oriented silicon steel, the water repellent agent is adopted to restrain hydration of the magnesium oxide, so that water which is taken into a steel coil because of Mg(OH)2 is reduced, and a uniform magnesium silicate bottom layer is formed, and therefore, consistency of a dew point among steel coil layers is guaranteed, and a peroxidation phenomenon is avoided.

The invention discloses a restoration agent for chromium-contaminated soil and a restoration method thereof. The restoration agent comprises a nanometer iron suspension and a dominant bacterial strainsuspension. The restoration method comprises the following steps: uniformly mixing the nanometer iron suspension and the dominant bacterial strain suspension with the chromium-contaminated soil, adding water to maintain the water content of soil to be 50 to 60%, and carrying out restoration at a normal temperature. According to the invention, through the synergistic action of nanometer iron and microorganisms, hexavalent chromium in the soil is reduced to trivalent chromium; the trivalent chromium and trivalent iron generated by corrosion of the nanometer iron generate an insoluble ferrochrome precipitate; and the chromium is fixed in iron oxide. The restoration method provided by the invention improves adsorption of the nanometer iron and reduction of the hexavalent chromium, and greatlyreduces the migration ability and bioavailability of the chromium at the same time. The restoration agent and the restoration method provided by the invention have the characteristics of high restoration efficiency, simple and convenient operation and stable effect, and are applicable to restoration of the chromium-contaminated soil.

The invention provides a spraying polyurea elastic anticorrosive paint, and a preparation method thereof. The spraying polyurea elastic anticorrosive paint comprises, by weight, a component A and a component B; the component A comprises 30 to 40 parts of polyether polyol N220, 10 to 20 part of polyether polyol N330, and 30 to 60 part of isocyanate MDI-50; the component B comprises 40 to 60 parts of amine-terminated polyether D-2000, 5 to 10 parts of amine-terminated polyether T-5000, 10 to 20 parts of amino chain extender E-100, and 20 to 30 parts of amino chain extender 6200. The spraying polyurea elastic anticorrosive paint possesses high frequency impact resistance, no shedding or cracking is caused after 2 million times of impacting; the bonding strength is 10Mpa or higher; 3000h saltspray resistance test is passes; the physical strength is high (>=19Mpa), the physical elongation percentage is high (>=450%), the impact resistance is excellent, and the other physical mechanical properties are capable of satisfying requirements in spraying polyureas protection material standard.

The invention relates to a method of preparing fluorine-containing olefin, and belongs to the technical field of organofluorine chemistry. The method comprises the following steps: firstly adding non-alcohol organic solvents, water and a metal dechlorinating agent with grain size of 40-150 microns into a container for stirring and mixing, and then rising the container temperature to 45 DEG C-65 DEG C; then, adding the chlorine-fluorine alkane material and keeping the temperature at 50 DEG C-80 DEG C; finally, rectifying to obtain the fluorine-containing olefin product. The method disclosed by the invention ensures that the dechloridation reaction can be kept at a certain reaction speed from beginning to end, has the advantages of being safer and more efficient, and is suitable for industrial production.

The disclosure relates to a method for inspection of the quality of products produced by a production system, by monitoring the exhaustiveness, effectiveness and reliability of a traceability system associated with said production system. The method includes the following steps: determination of a plurality of domains of said traceability system to be inspected; determination of a plurality of criteria to be monitored for each of said domains, said criteria for a domain being correlated to each other; for each of said criteria, assignment of a numerical data representing a quality value by measurement through at least one sensor and / or by assessment; for each of said domains, multiplication of all said numerical data for each said criterion in said domain and application of a mathematical regression function to the resulting product to obtain a numerical data representative of a quality value of said domain; comparison of said numerical data with at least one predetermined threshold for each of said domains.

The invention discloses a polyether amine water reducing agent with a controllable and regular molecular structure. A preparation method of the polyether amine water reducing agent comprises the following steps: adopting an end-amino polyether and diepoxide to have amino-epoxy ring-opening polymerization reaction, obtaining a polymer with the end-amino polyether being grafted on a main chain into a side chain, and then enabling hydroxyl generated in the amino-epoxy ring-opening polymerization reaction to have esterification reaction with organic anhydride to obtain the polyether amine water reducing agent with the controllable and regular molecular structure. The water reducing agent prepared by the invention has the advantages of the existing water reducing agent, is also good in controllability of the production process, less in side reaction, high in applicability to different cement varieties, high in water reducing rate and high in cost performance and competitive advantage.

The invention relates to a process for the production of di- and polyisocyanates of the diphenylmethane series and mixtures thereof, in which aniline and formaldehyde are reacted in the presence of an acid catalyst to form di- and polyamines of the diphenylmethane series; the di- and polyamines of the diphenylmethane series are phosgenated, optionally in the presence of a solvent, to obtain a crude di- and polyisocyanate; from the crude di- and polyisocyanate, at least one fraction containing at least 5 wt. % 3-ring and multi-ring MDI and at least one fraction containing at least 95 wt. % 2-ring MDI are separated by distillation, and the acidities of the fraction containing at least 5 wt. % 3-ring MDI and multi-ring MDI, and / or the fraction containing at least 95 wt. % 2-ring MDI are determined analytically; and an acidic compound is added to the fraction containing at least 5 wt. % 3-ring MDI and multi-ring MDI, and / or the fraction containing at least 95 wt. % 2-ring MDI, so that the desired acidity is achieved.

The invention relates to a waterborne epoxy curing agent for waterborne epoxy resin as well as a preparation method and an application method of the waterborne epoxy curing agent. Mercapto and amino groups are taken as curing reaction groups of the waterborne epoxy curing agent, a curing agent structure comprises a tertiary amine structure which can be dispersed or dissolved in water. Compared with a polyamine curing agent, the prepared quick-drying curing agent is faster in curing and better in impact resistance and can realize low-temperature curing; compared with a thiol curing agent, the prepared quick-drying curing agent is faster in curing, and hardness, bending performance and impact resistance of a film are improved remarkably.

The invention discloses a preparation method for closed-type aliphatic-series isocyanate water dispersoid, which aims to solve the technical problems of low cementing or splicing strength existing in the traditional closed-type aliphatic-series isocyanate. The preparation method for the closed-type aliphatic-series isocyanate water dispersoid comprises the following steps: 1. drying polyatomic alcohol; 2. adding the polyatomic alcohol and dimethylolpropionic acid into compound solvent, stirring, introducing nitrogen, and keeping warm for 15-45 minutes after heating; 3. dripping aliphatic-series isocyanate; 4. adding blocking agent; 5. adding triethylamine, then adding deionized water, emulsifying, and stopping introducing the nitrogen; and 6. removing the compound solvent. The closed-typehexamethylene diisocyanate (HDI) water dispersoid prepared with the preparation method can be used for high-grade cementing and finishing fields, such as wood lacquers, leather finishing agent, aqueous adhesive and the like, also can serve as the crosslinking curing agent and the accessory ingredient for film forming resin and is applied to the fields, such as enamelled wires, paper treating agent and the like.

The invention discloses a supported palladium catalyst with characteristic of specific infrared absorption, comprising a carrier, palladium and optional modifying component. For finding a noble metal catalyst with good catalytic performance accurately and effectively, the carbon monoxide adsorption in-situ infrared spectroscopy is used for testing the catalyst at the temperature of 40 DEG C, in the obtained infrared spectrum, the ratio of the area of a bridge type absorption peak at the value of 1930-1990 cm<-1> to the area of a bridge type absorption peak at the value of 1870-1930 cm<-1> is less than 0.2, and more preferably 0.15. In addition, preferably, the ratio of the peak height of an absorption peak at the value of 1870-1930 Cm<-1> in the in-situ infrared spectrogram obtained by testing the catalyst when being purged with nitrogen gas for 0 min to the peak height of an absorption peak at the value of 1800-1900 cm<-1> in the in-situ infrared spectrogram obtained by testing the catalyst when being purged with nitrogen gas for 15 min is less than 5, and more preferably 2. The catalyst has excellent reaction selectivity and activity, and the preparation method of the catalyst is easy to operate and saves energy.

The invention provides a selective hydrogenation method for allylene and allene in propylene material flow. The method comprises the following steps of: introducing the propylene material flow containing 1-(methylamino)-2,3-propanediol (MAPD) and hydrogen into a hydrogenation reactor filled with a supported palladium catalyst, and performing selective hydrogenation on the MAPD in the propylene material flow at the inlet temperature of between 10 and 80 DEG C and a molar ratio of the hydrogen to the MAPD of 1-5 under the reaction pressure of 0.1-4Mpa, so that the MAPD becomes propylene and is removed, wherein the catalyst comprises a carrier, palladium and optional modifying components; and a carbon monoxide adsorption in situ infrared ray spectroscopy is used for testing the catalyst at 40DEG C, and an area ratio of a bridge absorption peak at a position of 1,930-1,990cm<-1> to a bridge absorption peak at a position of 1870-1,930cm<-1> in an infrared spectrum is less than 0.2 and preferably less than 0.15. By the method, the selective hydrogenation reaction for the allylene and allene in the propylene material flow has high selectivity, and can be stably performed for a long period.

The invention belongs to the field of enclosed type aromatic isocyanate aqueous dispersion preparation, and provides a preparation method of an enclosed type aromatic isocyanate aqueous dispersion. The invention aims at solving a technical problem of poor stability of existing aromatic isocyanate aqueous dispersion preparation methods. The method provided by the invention comprises steps that: 1, polyhydric alcohol is dried by baking; 2, polyhydric alcohol and dimethylol propionic acid are added into a solvent, and are stirred; nitrogen is delivered into the solution; the solution is heated, and the temperature is maintained for 15-45min; 3, aromatic isocyanate is dropped into the solution; 4, a blocking agent is added to the solution; 5, triethanolamine is added to the solution, and deionized water is added to the solution; the solution is emulsified, and nitrogen delivering is stopped; 6, the solvent A is removed. The enclosed type aromatic isocyanate aqueous dispersion prepared by the invention can be directly used as a single-component environment-friendly adhesive and a paint in fields of aqueous adhesive and wooden lacquerware. The enclosed type aromatic isocyanate aqueous dispersion can also be prepared into a molding resin cross-linking curing agent and a molding resin auxiliary agent in fields such as enameled wire and fabric.

The invention provides a formation method of a ternary soft-package battery cell. The formation method at least comprises the following steps of placing the pre-sealed and stood ternary soft-package battery cell into a formation cabinet; forming for 0.5 to 1.0h at the temperature of 40 to 70 DEG C, pressure of 20 to 1000kPa at the surface of the battery cell, and charging current of 0.01 to 0.1C;maintaining the pressure, reducing the formation temperature to 0 to 30 DEG C, charging for 0.5 to 1.5h at the current of 0.01 to 0.1C, and then charging for 0.5 to 1.0h at the current of 0.02 to 0.2C; maintaining the pressure, adjusting the formation temperature to 18 to 25 DEG C, and charging at the current of 0.1 to 0.5C until the voltage of the ternary soft-package battery cell reaches 3.5 to4.0V; placing the ternary soft-package battery cell under the environment with temperature of 30 to 55 DEG C for 24 to 60h. The formation method of the ternary soft-package battery cell can effectively improve the cycle property of a ternary soft-package lithium ion battery.

The invention provides a method for increasing the yield of an SiC nano fiber by applying boric acid and relates to an application method of the boric acid, solving the problems that the existing SiC nano fiber preparation method has the defect of low yield, and the boric acid is not applied to the production field of the SiC nano fiber. The method for increasing the yield of the SiC nano fiber by applying the boric acid is carried out according to the following steps that: 1, sucrose and silicasol are mixed, then boric acid is added into the mixed liquid, the mixed liquid is dried, and xerogel is obtained; 2, the xerogel obtained in the step 1 is put in a tubular furnace, nitrogen gas is introduced into the tubular furnace, the temperature of the tubular furnace is raised and kept, and gel powder is obtained; and 3, ball milling is carried out for 3 hours, absolute ethyl alcohol is added, an atmosphere sintering furnace is adopted, and the furnace is cooled to room temperature to obtain an SiC nano floss layer in the shape of wool felt. The invention applies the boric acid in the production of the nano fiber, the yield of the SiC nano fiber is increased by more than 10 times after the boric acid is applied, and the fiber length reaches 5 to 6cm.

The invention discloses a preparation method of high-end nanometer calcium carbonate for butyl rubber products. CaO and water take nitration reaction; generated Ca(OH)2 emulsion is subjected to impurity removal, aging and grinding; after crystal form control agents are added, carbonization synthesis reaction is performed with washed CO2-containign kiln gas; after the reaction is completed, CaCO3 cooked pulp is obtained; modifying agents are added into the cooked pulp; next, performing grinding; then, performing press filtering dewatering and drying; next, coupling agents are added for crushingand grading; high-end nanometer calcium carbonate for a butyl rubber product is obtained. The prepared nanometer calcium carbonate has good dispersion performance and great specific surface area, isused in the butyl rubber products, realizes the functional nanometer calcium carbonate meeting the three factors of reinforcing performance, matching performance and processing performance, belongs toa product of synthesis calcium carbonate with the finest primary particle diameter (15 to 20nm) in the existing market, can replace the semi-reinforcing agents and can partially replace reinforcing agents.

The invention relates to a hydrogenation deoxygenation catalyst for the deoxygenation reduction of an oxygen-containing organic compound. The catalyst is spherical, comprises elements such as P, B, F, K, Zn, Zr, Mo, Fe, Cu, Ni and the like, has the diameter of 2 to 4mm, the specific surface area of 100 to 280m<2> / g, the pore volume of 0.45 to 0.85ml / g, the pore size distribution of 12 to 30nm, and the crushing strength of 180 to 320N / cm, and can be used for the common dynamic continuous hydrogenation reaction process and intermittent hydrogenation reaction; reaction materials can be gas-phase or liquid-phase materials; and operation process conditions are that: hydrogen partial pressure is 1.5 to 4.5MPa, the temperature is 200 to 450 DEG C, the space velocity is 0.5 to 3.5v / v, and the ratio of hydrogen to oil is 100 to 600h<-1>. Product yield is over 96 percent when the catalyst is used for hydrogenation deoxygenation reaction, and the catalyst has high reaction activity, stability and selectivity.

The invention provides a hardness removing device and method for a waste liquid by electric flocculation. The hardness removing device for the waste liquid by electric flocculation comprises a bufferadjusting tank, an electric flocculation reaction tank, a water quality adjusting tank and a sedimentation separation tank which are sequentially communicated; a stirrer is arranged in the buffer adjusting tank; water quality online detection systems are arranged at the inlet of the electric flocculation reaction tank and inside the electric flocculation reaction tank respectively; each system isprovided with an automatic water collection and distribution system, a multi-probe online monitoring device and a microcomputer program control module, wherein water quality and indices of pH, TDS andORP are termly and automatically monitored and fed back to the microcomputer program control module, so that the chain control of reagent addition, aeration intensity and water quality monitoring isrealized; iron or aluminum is adopted as an anode material in the electric flocculation reaction tank, and a pulse type power supply is used for supplying power; the water quality adjusting tank is used for adjusting the pH value of the waste liquid; and the sedimentation separation tank is an inclined tube sedimentation separation tank. According to the invention, the removal efficiency of hardness ions can be effectively improved, and the total hardness removal rate of the waste liquid can reach 80% or above stably.

The invention relates to a preparation method for copper nanoparticles wrapped with single-layer graphene and grown on a porous carbon material. The preparation method comprises the steps that three-dimensional graphene foam, porous carbon foam or porous metal foam serves as a conductive substrate, and the copper nanoparticles wrapped with the single-layer graphene is grown out on the surface of the conductive substrate through the chemical vapor deposition method. According to the preparation method for the copper nanoparticles wrapped with the single-layer graphene and grown on the porous carbon material, the copper nanoparticles are wrapped with the single-layer graphene, and the reaction activity of the copper nanoparticles is maintained; at the same time, the monatomic thickness of the single-layer graphene is utilized, and it is possible that electrons penetrate through the single-layer graphene and react with pollutants; the particle sizes of the copper nanoparticles are 5-50 nm, thus, surface copper atom unsaturated bonds are increased, and the reaction efficiency is further improved; and meanwhile, atomic state copper atoms are adopted as reaction precursors, so that the design of catalysts at the atomic level is possible.

The invention discloses resin for pultrusion of a carbon fiber composite material. The resin comprises 30%-60% of an epoxy resin system, 10%-30% of an unsaturated resin system, 2%-5% of a flexibilizer, 3%-5% of an internal releasing agent, 5%-10% of an active diluent and 3%-8% of chopped conductive fibers. The method can be used for pultrusion of the electromagnetic shielding carbon fiber composite material, meets the requirements of low reaction viscosity, high activity and good strength of a resin system in the pultrusion process, and can utilize the fiber conductive enhancer in the resin system to supplement the defect that the electromagnetic performance of the material is independently improved by the reinforced fibers. By optimizing the combination of the resin and combining with thepultrusion electromagnetic shielding carbon fiber plate, the effect that the shielding effectiveness is greater than 40dB under 150KHz-18GHz is achieved. Meanwhile, due to the particularity of the fiber conductive enhancer in the resin, the invention provides a pultrusion process method using the resin system.

The invention discloses a preparation method of weather-resistant aluminum alloy wood grain transfer printing sections. The method comprises the steps of surface treatment on aluminum alloy base materials, electrostatic spraying and solidification of wood grain transfer printing paint and wood grain transfer printing; in the electrostatic spraying process of the wood grain transfer printing paint,the wood grain transfer printing paint is prepared from polyester resin, epoxy resin, acrylic resin, nano cellulose, precipitated barium sulfate, montmorillonite, nano titanium dioxide, fumed silica,calcium carbonate, nano-alumina, glycerin, tetraethylammonium bromide, triglycidyl isocyanurate, a leveling agent, benzoin, polyethylene wax, pigment and an ultraviolet absorber UV-0. The preparationmethod of the weather-resistant aluminum alloy wood grain transfer printing sections is simple in process and mild in condition, and the obtained aluminum alloy wood grain transfer printing sectionsare good in weather resistance and excellent in heat resistance.

The invention relates to a bimetallic catalyst for degrading chlorinated organic pollutants in water, a preparation method and application thereof. The component of this catalyst is iron-nickel bimetal and carrier, and the mass ratio of iron-nickel bimetal and carrier is 100: (1-10), and wherein the mass ratio of iron-nickel in the iron-nickel bimetal is 100: (1-10) 5), the carrier is a modified zeolite. The iron-nickel bimetal is prepared by reducing nickel ions on the surface of iron filings with sodium dithionite as the reducing agent. The iron-nickel bimetal has a good degradation and dechlorination effect on carbon tetrachloride, trichlorethylene and tetrachlorethylene in wastewater, and the removal effect of carbon tetrachloride, trichlorethylene and tetrachlorethylene can reach 95% within one hour. % or more, and the dechlorination efficiency is above 90%.