722results about How to "The preparation method is simple and environmentally friendly" patented technology

The invention provides a preparation method of annular phosphonate or annular organic phosphate flame retardant. The steps are that (1) trimethylolpropane and trimethyl phosphate or triethyl phosphate are taken as the material, and react to synthesize into midbody under the condition of catalyzer; (2) phosphonate or organic phosphate is added into the midbody and is heated, and then the product of annular phosphonate or annular organic phosphate flame retardant can be obtained. The phosphite ester is selected from trimethyl phosphate and triethyl phosphate. The phosphonate is selected from dimethyl-phosphine and diethyl ethyl phosphine. The organic phosphate is selected from trimethyl phosphate, triethyl phosphate, phosphate propyl, tributyl phosphate and tricresyl aromatic ester. The invention overcomes the shortcomings of the prior art, the new preparation method of annular phosphonate or annular organic phosphate flame retardant is environment-friendly, solution is not needed, and the operation is simple. The termination product has excellent color and luster, low acid value and excellent viscosity; and does not need additional decoloration.

The invention provides a preparing method of an environment-friendly solvent-type electrostatic spinning waterproof and moisture-permeable membrane. The preparing method is characterized by comprisingthe steps of 1, preparing a high-molecular polymer solution with water or environment-friendly alcohols being solvents, adding a corresponding water-soluble or alcohol-soluble water repelling agent and cross-linking agent, and preparing a hydrophobic fiber membrane through an electrostatic spinning technology; 2, conducting aftertreatment on the fiber membrane to trigger a chemical crosslinking reaction between a polymer matrix and the cross-linking agent, reinforcing the water resistance of the fiber membrane and regulating the pore structure of the fiber membrane to obtain the environment-friendly solvent-type electrostatic spinning waterproof and moisture-permeable membrane. In the production process, no waste gas, waste water and solid waste are generated, the environment cannot be damaged, the prepared waterproof and moisture-permeable membrane does not contain toxic solvents, and in the actual application, the healthy of a wearer cannot be damaged; the resistance to water pressure of the fiber-based waterproof and moisture-permeable membrane is larger than or equal to 150 kPa, the moisture permeability is larger than or equal to 15,000 g / m<2> / d, the tensile breaking strengthis larger than or equal to 30 MPa, and the environment-friendly solvent-type electrostatic spinning waterproof and moisture-permeable membrane has a large application prospect in the field of functional protective clothes.

The invention discloses a preparation method of a phosphorus-nitrogen-carbon-containing aggregate and intumescent flame retardant of a nano-sheet structure. The preparation method is characterized in that phytic acid, melamine and a solvent are prepared, the substance amount ratio of the phytic acid to the melamine is 1: 3 to 1: 15, and 20-50 ml of the solvent is added into every 0.01 mol of the melamine; the melamine is added into a reaction container provided with a thermometer and a stirrer, the solvent is added with stirring, the phytic acid is added at the temperature of 20-40 DEG C, and a reaction is conducted with stirring for 20-50 minutes, so that reaction liquid is obtained; and the reaction liquid is poured into a reaction still to react for 24-56 h at the temperature of 70-120 DEG C, cooling and suction filtration are conducted, solid is washed with ethyl alcohol and then washed with water till the pH is 7, and the solid is dried, so that the flame retardant is obtained. The preparation method is simple and environmentally friendly, and the synthesized phosphorus-nitrogen-carbon-containing aggregate and intumescent flame retardant of the nano-sheet structure has good compatibility with a polymer matrix and has good flame retardance.

The invention relates to a preparation method of a titanium dioxide / graphene composite photocatalyst. The invention is to solve the technical problems that titanium dioxide in a titanium dioxide / graphene compound prepared by the traditional method has a large particle size and low photocatalytic efficiency. The preparation method comprises the following steps that: tetrabutyl titanate is added to a graphene oxide dispersion solution, a concentrated acid is added to adjust the acidity after ultrasonic dispersion, and then deionized water is added to continue to carry out ultrasonic treatment to obtain sol; and then the sol is transferred to a hydrothermal reaction kettle to be subjected to hydrothermal reaction, and then is washed and dried to obtain the titanium dioxide / graphene composite photocatalyst. The particle size of the titanium dioxide in the composite photocatalyst provided by the invention is 5 to 10nm, and the composite photocatalyst can be used for visible light catalytic degradation of methyl orange, and the catalytic efficiency can reach 75% within 2 hours. The titanium dioxide / graphene composite material provided by the invention can be used as a photocatalytic material, a solar cell material and a lithium ion battery cathode material.

The invention relates to a flexible resistance type pressure transducer which can be applied to human body pulse detection. Polymer micro-nano fibers prepared by adopting an electrospinning technique are taken as a framework, and graphene is taken as a conductive active layer and coats the outer layer of the framework, so that a sensitive layer of the transducer is formed; and then the sensitive layer is transferred onto a polydimethylsiloxane (PDMS) substrate, and finally another PDMS thin film covers a composite material for encapsulation, so that a device is formed. The device can be arbitrarily made into an n*m transducer array as required, so that the flexible resistance type pressure transducer is made. The flexible resistance type pressure transducer provided by the invention has extremely high sensitivity, extremely high response and restoration speed and stable response performance on a weak pressure and has good detectability on human body pulse.

The invention discloses a method for preparing a composite graphite carbon cathode material, comprising the following steps that: 1. a step of adding and mixing materials, during which fine carbon powder and a caking agent with a weight ratio between 2:1 and 20:1 are added alternately in the stirring process, the mixture is stirred for 0.1 to 3 hours after adding the materials, the caking agent is selected from a thermoplasticity resin, asphalt and coal tar; 2. a step of increasing the temperature, during which the temperature is increased up to between 450 and 600 DEG C with a rate of 0.5 to3 DEG C per minute; 3. a step of keeping the temperature, during which the temperature of between 450 and 600 DEG C is kept constant for 1 to 10 hours; 4. a step of cooling to the room temperature; and 5. a step of graphitzation; wherein, the steps of 1 to 4 are performed without the protection of oxidation. The raw materials have high operating factor; the preparation method is environment-friendly and easy to implement; moreover, the composite graphite powder prepared has good isotropic properties and the characteristics of good high current performance, long cycle and low nonreversible capacity.

The invention provides a preparation method and application of a supported metal oxide catalyst for removing ammonia nitrogen in water through catalytic ozonation. The preparation method comprises the steps of impregnating a catalyst carrier subjected to activating treatment in an impregnating solution formed through mixing any two metal salts of cobalt, manganese, cerium, iron, nickel, magnesium and copper for a certain time, then drying, and roasting to obtain the supported metal oxide catalyst. The preparation method is green and environmental-friendly, simple to operate, and easy for industrialization. By applying the supported metal oxide catalyst prepared by the invention, ammonia nitrogen can be converted into nitrogen at the normal temperature and the normal pressure so as to be effectively removed. Co3O4-Al2O3 is adopted as a catalyst for reacting for 6h, and the removal rate of the ammonia nitrogen of 200mg / L of ammonium chloride stimulated wastewater approximates to 100 percent, so that the supported metal oxide catalyst has a better effect on removing the ammonia nitrogen through catalytic ozonation.

The invention discloses a water phase preparation method of a spherical silver nanoparticle with adjustable size, which comprises the following steps of: 10, preparing a silver seed solution : 101, mixing deionized water with a sodium citrate solution, and obtaining a stabilizer solution after stirring; 102, heating the stabilizer solution to the temperature of water bath, adding an AgNO3 solution, and then adding a NaHB4 solution; and 103, utilizing the deionized water to obtain a constant volume after cooling at room temperature, and obtaining the silver seed solution; 20, preparing the spherical silver nanoparticle: 201, adding deionized water to a flask, then adding sodium citrate solution to obtain a reducer solution, and heating the reducer solution to a boiling state; 202, adding the silver seed solution to the reducer solution, and then adding the AgNO3 solution; and 203, cooling at room temperature to obtain the spherical silver nanoparticle. The preparation method can be used for preparing the spherical silver nanoparticle with favorable monodispersity, and the size of the spherical silver nanoparticle can be adjusted.

The invention discloses a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a transparent conductive substrate, a hole transport layer, a decoration layer, a perovskite layer, an electron transport layer, a barrier layer and a metal electrode. The surfaces of PEDOT: PSS, NiOx and the hole transport layer are decorated by ionic liquid based on imidazole, atomic force microscope graphs before and after the decoration are compared, and the decorated surface appearance is more smooth, which is conducive to inhibiting the compounding of dark current. The perovskite layer is a new perovskite material 3MAI: PbAc2.xH2O (x is not smaller than 0 and is not greater than 3), and is prepared by quickly preheating a substrate and heating a perovskite precursor solution, namely instant heating assisted spray coating technology (HASP) at a low temperature (lower than 100 DEG C), which is conducive to increasing the grain size of perovskite and reducing the defects between perovskite grains so as to greatly improve the efficiency of the perovskite battery. The photoelectric conversion efficiency of the final battery device is greater than 19%, the flexible device efficiency is 10.8%, no hysteresis effect is formed, and thus the preparation method has a broad application prospect.

The invention relates to a kind of globe-form cellulose absorbent with iron carrying and its manufacturing and application. The carrying agent of the invention is globe-form cellulose, and the active center is the hydroxide of iron in the specific form, which has the high absorption activity. The manufacturing feature is as follows: dropwise alkali solution tardily into the solution of cellulose bead and molysite; in stirring condition, iron can load the cellulose bead by dispersing and hydrolyzing; after loading repeatedly and frequently, use the alkali solution to stabilize the ferruginous form. The manufacturing method of the absorbent has the advantages of environmental protection, novelty, simplicity and low cost. Moreover, it can remove arsenic, fluorine and other heavy metal with high efficiency and high selectivity, and the absorbent has excellent usage-prospect in nowadays.

The invention relates to the field of nano materials, and discloses the nano material and application of the nano material, and a method and a device for preparing the nano material. The nano material comprises a nano fiber, wherein at least two micro nano knots are arranged on the nano fiber and are formed by reuniting at least one micron or nano particle; and the nano material is mainly prepared by adding the micron or nano particles into a spinning polymer solution or a solvent by electrostatic spinning or plasma spinning. The nano material has a structure similar to a dumbbell; the integration degree and the performance of a device made of the nano material can be improved; when the device is used as an electric appliance, the charge conveying can be improved; the materials of the nano knots of the nano material can be controlled; the nano material can be designed to be a heterojunction or PN knot device; and the contact resistance of the electronic device can be effectively reduced. The nano material is suitable for the field of energy storage and power battery materials and devices, solar materials and devices, composite materials, sensors, transistors and the like.

The invention discloses an antibacterial self-healing hydrogel dressing capable of accelerating healing of chronic wounds as well as a preparation method and application thereof. The method comprisesthe following steps: firstly oxidizing sodium hyaluronate, sodium alginate and pulullan through a strong oxidant to obtain polysaccharide with aldehyde group, then forming a polymer with network withcationic polymers such as epsilon-polylysine, polyethyleneimine and chitosan through Schiff base reaction, then fully mixing the polymer with F127 to form a hydrogel with a dual-network structure, finally loading exosome on the cationic polymers through electrostatic effect, coating the exosome in the hydrogel with the dual-network structure to obtain the antibacterial self-healing hydrogel dressing capable of accelerating healing of the chronic wounds. The preparation method is simple and is free of organic solvent residues; the used chemical synthesis method is environmentally friendly and is convenient to operate and low in raw material cost.

The invention provides a sulfur-fixing combustion-supporting high-temperature profile control agent, and a preparation method and application thereof. By taking the total weight of the sulfur-fixing combustion-supporting high-temperature profile control agent as 100%, the profile control agent is prepared from the following raw materials in percentage by weight: 3-5% of soft oil sludge, 2-4% of silicon sludge, 1-2% of low sulfur coal powder, 0.8-1.5% of sodium bentonite, 0.5-1.2% of plant fiber particle, 0.2-0.3% of saltpetre powder, 0.1-0.2% of coal gangue powder, 0.2-0.4% of limestone powder, 0.1-0.2% of polyanionic cellulose, 0.08-0.15% of alpha-sodium olefinsulfonate, 0.1-0.2% of sodium tripolyphosphate and the balance of water. The profile control agent has favorable stratum compatibility, causes no damage to the oil reservoir, does not pollute the stratum, and has favorable temperature tolerance; and meanwhile, the profile control agent has sulfur-fixing and combustion-supporting functions, thereby being completely applicable to a profile control technology for a thick oil fireflood chemical profile control gas injection well.

The invention belongs to the technical field of a cathode material for a lithium primary battery, particularly relates to the field of preparation of the cathode material for a fluorocarbon battery, and in particular to a composite carbon fluoride cathode material for the lithium primary battery, a preparation method and an application thereof. The material is a composite material prepared by ballmilling and mixing a porous carbon fluoride material having a high tap density and a carbon fluoride material having a high graphitization degree and then fluorinating the mixture. The composite material has a carbon content of 38-60%, a fluorine content of 40-62% and a tap density of greater than 0.8g / ml; the mixing mass ratio is in the range of 1:0.1-1:10; and the composite material has high specific surface area, high tap density and high graphitization degree. Due to the high tap density of the material, the overall high volumetric specific energy of the material is guaranteed; through anion diffusion channel composed of porous carbon fluorides, the voltage hysteresis phenomenon at the initial stage of the battery discharge is effectively improved and the overall discharge performance of the material is improved.

The invention relates to preparation of a carboxymethyl cellulose-chitosan composite material and identification of a tryptophan enantiomer by a modified electrode of the composite material through an electrochemical process. The preparation comprises the following steps of: preparing the carboxymethyl cellulose-chitosan composite material; preparing the electrode modified by the carboxymethyl cellulose-chitosan composite material; and identifying the tryptophan enantiomer through the electrochemical process. The preparation and the identification, provided by the invention, have the beneficial effects that the preparation method of the carboxymethyl cellulose-chitosan composite material is simple and environmentally friendly; the electrode modified by the carboxymethyl cellulose-chitosan composite material has a relatively good identification capability on the tryptophan enantiomer. Carboxymethyl cellulose and chitosan have a selectively synergistic effect on the tryptophan enantiomer.

The invention discloses a terylene fabric deepening agent copolymer emulsion and preparation method thereof. Organic silsesquioxane is prepared, epoxy chloro alkyl compound of amino silicone oil is modified, and then the organic silsesquioxane and modified epoxy chloro alkyl compound of amino silicone oil are compound. The organic silsesquioxane with smaller molecular weight and particle size is prepared by using the emulsion polymerisation technology according to the invention, and the silicon content in the object is high, and the silicon one of the main component of the deepening agent, and the preparation method is environmental protection without pollution, and the epoxy chloro alkyl compound of amino silicone oil containing double-amino with suitable molecular weight is appropriately modified, and a epoxide group is introduced, and after the fabric is processed, the hydrophility keeps unchangeable. The invention has an obvious color increasing effect, and after the fabric is treated by the deepening agent, no residual harmful substances are on the fabric surface, so the product belongs to the green environmental protection finishing agent.

The invention relates to a lignin-based graphene preparation method, which comprises the following steps: dissolving lignin in deionized water to prepare 5-10wt% of a lignin aqueous solution, adding NaOH to adjust pH value to 10-12, mixing the lignin aqueous solution treated with NaOH and 0.01-1 g / L of a graphene oxide solution according to the volume ratio of 10:1-1:1, carrying out a hydrothermal reaction at 120-160 DEG C for 1-24h to obtain a graphene solution, repeatedly cleaning with ethanol and deionized water, centrifuging, and carrying out drying treatment to obtain a graphene powder. According to the invention, lignin obtained after alkali treatment is used as a reducing agent, and graphene is obtained through a hydrothermal reaction. The preparation method is green and environmentally friendly; costs are low; the technology is simple; and the prepared graphene has good dispersity and stability.

The invention relates to a preparation method of leather, and provides a preparation method of soft leather dyed by wax, the method is capable of reducing production cost, reducing environmental pollution and reducing energy consumption, and comprises the following steps: 1) preparing blue wet leather; 2) performing machinery wet treatment; 3) tanning and dyeing; 4) drying for arrangement and 5) coating.

The invention discloses a porous carbon, and a preparation method and applications thereof. The preparation method of the porous carbon comprises the following steps: (1) under the non-oxidizing condition, calcining at least one of alginic acid, sodium alginate, kalium alginate, lithium alginate, magnesium alginate and calcium alginate to obtain the porous carbon precursor; (2) treating the porous carbon precursor, which is obtained in step (1), with water or acid solution to obtain wet porous carbon; and (3) drying the wet porous carbon obtained in step (2) to obtain porous carbon. When the porous carbon is used as an electrode material for electrochemical capacitors, due to abundant multilevel pore structures and oxygen functional groups, the porous carbon can fully utilize the surface area in the structures and provide additional pseudo capacitance, so that the porous carbon has the advantages of higher capacity, energy density, power density and electrochemical stability. The preparation method is green and environment-friendly, and is very suitable for large-scale production.

The invention discloses a preparation method for a silicon-carbon composite negative electrode material. The preparation method comprises the steps of performing dispersing on nanometer silicon, graphite and an organic matter separately and mixing in proportion; next, performing heating and drying and heating until the temperature reaches an organic matter softening point temperature or above, and performing fusing and binding and low-temperature carbonization to obtain an organic matter cracked carbon-coated primary coating material; performing dispersing on the organic matter and the primary coating material separately and mixing in proportion; and next, performing heating and drying and heating until the temperature reaches an organic matter softening point temperature or above, and performing fusing and coating and high-temperature carbonization to obtain an organic matter cracked carbon-coated secondary coating material, namely the silicon-carbon composite negative electrode material provided by the invention. The initial reversible capacity of the negative electrode material prepared by the method can reach 649mAh / g, and the capacity retention ratio after 50 cycles can be maintained at 85.36%, and quite excellent cycling performance is shown; and in addition, the preparation method has a simple and environment-friendly process, low energy loss, rich silicon and graphite raw material resource, low cost and high safety, and is suitable for industrial production and use.

The invention provides a preparation method for an aryl substituted p-phenylenediamine substance. The aryl substituted p-phenylenediamine substance has the following structural formula defined in the specification, wherein R'' is phenyl or o-methyl phenyl, and R' and R'' are the same or different. The preparation method comprises the steps of carrying out a reaction of a raw material A and a raw materials B under the action of a hydrogen acceptor and a catalyst, to form the aryl substituted p-phenylenediamine substance, wherein the raw material A has the structural formula defined in the specification, the raw material B is cyclohexanone and / or o-methylcyclohexanone, and the hydrogen acceptor is a hydrogen acceptor which can accept hydrogen to be converted into the raw material B. The preparation method provided by invention has the advantages that the raw materials are cheap and easy to obtain, and reaction post-processing has no need of use of a lot of water. At the same time, the reaction conditions are mild, and equipment cannot be corroded. Therefore, the preparation method has the advantages of environmental protection and less pollution and can obtain better economic benefits.

The invention discloses self-healing hydrogel capable of promoting wound healing and cancer therapy and preparation method thereof. The self-healing hydrogel is FCB hydrogel which is prepared by Schiff base reaction among a polyether-cationic polymer water solution with a mass concentration as 8% to 50%, a polyether-p-hydroxy benzaldehyde water solution with a mass concentration as 10% to 40% anda dopamine modified biological active inorganic material water solution with a mass concentration as 2% to 10%, the water solutions are mixed according to a volume ratio of (22 to 28) to (7 to 10) to(4 to 10), the F is polyether-cationic polymer, the C is polyether-p-hydroxy benzaldehyde, and the B is a dopamine modified biological active inorganic material. The self-healing hydrogel has good biological compatibility, better photo-thermal character and stronger antibacterial property; under laser radiation, the self-healing hydrogel can effectively inhibit animal cancer growth; furthermore, the self-healing hydrogel can promote mouse skin damage repair. The preparation method has the advantages of simpleness, no organic solvent residue, environment-friendly synthesizing method, convenience in operation and low raw material cost.

The invention belongs to the technical field of synthesis of inorganic porous materials and particularly relates to a preparation method of a house-of-cards-like hierarchical porous ZSM-5 molecular sieve which is low in cost, environment-friendly and fast. The preparation method comprises the following steps: adding an inorganic alkali source and an aluminum source into deionized water, and adding a proper amount of N-methyl-2-pyrrolidone (NMP); then, slowly adding a silicon source; fully and uniformly stirring; and synthesizing a house-of-cards-like hierarchical porous HCL-ZSM-5 molecular sieve by a one-step hydrothermal method. The molecular sieve has remarkable hierarchical porous structural characteristics, is large in external surface area, strong in acidity and good in stability, and has wide application prospects in the fields of catalysis, adsorption, separation and the like. In an alkaline ZSM-5 synthetic system without an organic template, by using non-toxic and cheap NMP as a structural guiding agent which is used for replacing an expensive macromolecular organic template, the method is an economic, efficient and environment-friendly synthetic method which is expected to be applied to large-scale commercial production.

The invention provides a preparation method of a nickel-cobalt-manganese ternary material; under the stirring effect, the co-precipitation reaction is implemented for soluble salt of nickel, soluble salt of cobalt, soluble salt of manganese and precipitating agent under the condition of 7.5-8.5 of pH value to obtain a nickel-cobalt-manganese ternary material precursor; the stirring speed is 600-1000 r / m; the reaction temperature of the co-precipitation reaction is 40-60 DEG C; the lithiation is implemented for the nickel-cobalt-manganese ternary material precursor to obtain the nickel-cobalt-manganese ternary material. The preparation method prepares the nickel-cobalt-manganese ternary material precursor with spherical morphology through comprehensively controlling the stirring speed and reaction temperature of the co-precipitation reaction and the pH value of the reaction system in the reaction process in the process of preparing the nickel-cobalt-manganese ternary material precursor; the method for preparing the nickel-cobalt-manganese ternary material, provided by the invention, is environment-friendly, and has lower cost.

The invention relates to the technical field of microwave absorption and particularly relates to a graphene compounded wave absorbing material and a preparation method thereof. The graphene compounded wave absorbing material is prepared through uniformly compounding carbonyl iron and graphene. The preparation method comprises the steps: firstly, preparing graphite oxide by using an improved Hummers method, and then, uniformly dispersing the graphite oxide into a carbonyl iron dispersion solution; then, reducing the graphite oxide to graphene by using an ultrasonic reduction method, thereby preparing the graphene compounded wave absorbing material. Compared with the pure carbonyl iron and the pure graphene, the compounded wave absorbing material provided by the invention has the advantages that the wave absorbing performance is superior, the wave absorbing strength is high, the frequency band of wave absorbing is wide, and the density is relatively low; the compounded wave absorbing material has adjustability, high absorption at different frequencies is achieved through adjusting the mass ratio of the graphene to the carbonyl iron and the thickness of the compounded material.

The invention discloses a graphene and ferrum diselenide composite material and a method for preparing the same. The method for preparing comprises the following steps: selenium-containing inorganic salt and ferrum-containing inorganic salt are put into a stainless steel reactor; hydrazine hydrate and source graphene solution are mixed together and stirred uniformly to form an ink black solution to be added into the reactor, and the reactor is closed so as to carry out reaction; and after the reaction is completed, natural cooling is carried out, reaction precipitate is subjected to repeated washing and suction filtering through distilled water and absolute ethyl alcohol, and after the drying, the product is collected and stored in a drying device. According to the prepared graphene and ferrum diselenide composite material, a graphene sheet wraps ferrum diselenide nanoparticles, the ferrum diselenide is tightly combined with the graphene sheet, so that high specific surface area and excellent magnetic performance are obtained. The method adopts a simple hydrothermal method, the graphene reduction oxide and the composite preparation of the praphene and the ferrum diselenide can be synchronously carried out, and the method has the advantages of simplicity in technology, low reaction temperature, low cost, green, controllability and applicability for industrial production.

A preparation method of a covalent triazine framework material with rich defects comprises the following steps: mixing 1,4-dicyanobenzene with 4,4-biphenyldicarbonitrile, adding trifluoromethanesulfonic acid, performing stirring in a -5-5 DEG C environment under the protection of an inert gas for 1-2 h, raising the temperature to 80-120 DEG C, keeping the temperature for 10-30 min to obtain a transparent solid substance, grinding the transparent solid substance by a mortar, washing the ground solid with ethanol and water, and drying the washed solid to obtain the material. A manner for introducing a defect into a covalent triazine framework is provided by the invention to make the covalent triazine framework have rich adsorption active site, so the obtained material can be used as a highly active adsorbent. The material used as the adsorbent has the advantages of green and environmentally friendly preparation method and low cost; and the material contains rich defect sites as high energy sites for adsorbing pollutants, so the covalent triazine framework can adsorb aromatic substances at a very high adsorption rate and a very high adsorption capacity.

The invention discloses a preparation method of non-smoked low-salt flavored preserved meat. The preparation method comprises the following steps: (1) stewing chicken soup, cooling the chicken soup to 35 to 50 DEG C, then adding salting ingredients into the chicken soup, and preparing salting soup; (2) placing pork into the salting soup, completely immersing the pork in the salting soup, and then processing the salting soup with the pork for 30 to 60 minutes in an ultrasonic field and an electrostatic field; (3) taking out the pork, and immersing the pork in red tea water or fried white granulated sugar water; (4) draining the pork immersed in the red tea water, placing the drained pork in a drying oven, and drying the pork at the temperature of 60 to 70 DEG C; (5) vacuum packaging the pork. The preserved meat prepared in the preparation method does not contain smoking harmful components and is low in salt content, thereby being healthier than the traditional preserved meat. Moreover, the smoking is not needed, and the preparation method is more environment-friendly. The preparation method is capable of obviously shortening the preparation period and more suitable for the mass production.

The invention provides a mercury-free catalyst applied to stationery bed for preparing chloroethylene and a preparation method thereof. The catalyst takes activated carbon, pretreated by hydrochloric acid or sodium hydroxide water solution, as a carrier, and gold trichloride and ferric chloride as active components, and compared with the ordinary mercury-free catalyst, according to the preparation method of the catalyst, the gold trichloride is guaranteed not to be reduced and can be uniformly and firmly loaded on the surface of the activated carbon carrier by replacing nitrohydrochloric acid in the preparation of the catalyst with hydrogen peroxide and taking other metal chloride, capable of promoting the decomposition of the hydrogen peroxide, as auxiliaries. The catalyst has high activity and selectivity in the reaction of preparing chloroethylene in the stationery bed through acetylene hydrochlorination, and the preparation method is simple and efficient, and green and environment-friendly, and has important practical significance in the industrial application.

The invention provides a method for preparing carbon nanotube grafted with vinyl macromolecular chain on the surface. The method is characterized in that carbon nanotube is processed by Fenton reagent formed by soluble ferrous salt and oxyful, so as to realize surface hydroxylation; a coupling agent containing unsaturated double bond functional groups is used for surface treatment; and the carbon nanotube of which the surface is provided with double bonds, and vinyl monomer are processed by graft polymerization reaction to obtain the carbon nanotube grafted with vinyl macromolecular chain on the surface. The method has the advantages of environmental protection, high efficiency, low cost and simple process, and is suitable for industrial production. The obtained functionalized carbon nanotube has excellent oil solubility or water solubility, vinyl monomer used for graft is adjusted to realize that the carbon nanotube can be endued with favorable dispersibility in a majority of polymer materials and higher interfacial function which mainly depends on chemical bonds can be formed by the carbon nanotube and the polymer materials, and therefore, the excellent performances of the carbon nanotube can be fully utilized to prepare high performance or functionalized polymer composite materials.