240results about How to "The production process is safe and environmentally friendly" patented technology

The invention discloses a method for preparing carbon and producing a controlled-release fertilizer by utilizing crop straws and the controlled-release fertilizer prepared by using the method, solving the problem that the straws can not be effectively utilized. The method mainly comprises the three steps of straw granulation, combustion carbon discharge and fertilizer preparation. By using the method, batch processing and effective utilization are carried out on the straws; the method is easy to grasp, has strong environmental suitability and is suitable for large-scale popularization and usein countries; by using the method, carbon can be prepared from the straws and then is used for preparing the fertilizer and the straws can also be prepared into biomass fuel for use; and production process is environmentally-friendly, thereby achieving cyclic utilization of energy and relieving the critical conditions of fertilizers and fuels in countries.

The invention provides a gravure water-based ink printing process ensuring a sand surface effect. The process comprises the following steps of: graving a gravure plate, controlling an ink cell opening of the gravure plate to range from 100 to 130mu m and the plate depth to range from 25 to 35mu m; blending water-based ink, namely selecting water-based ink which has the operating temperature of normal temperature and the grain size of less than 25mu m, and adjusting the viscosity of the water-based ink for 22 to 25 seconds (at 25DEG C) by using a solvent; printing; and drying a printed matter by adopting a hot air drying system, wherein the air speed of the hot air is 60-70m / s and the temperature of the hot air is 110-120DEG C. By the process, large-area high-precision printed matters with the sand surface effect can be obtained; and the obtained products have high printing quality and low cost, and are more easily recycled than products printed with ultraviolet (UV) ink, and the production process is safe and environment-friendly.

The invention discloses a method for preparing carbon coated hexagonal boron nitride. The method is characterized in that boric acid and urea are used as raw materials to prepare hexagonal boron nitride, maleic anhydride ethylene octylene graft copolymers are used as a carbon source, the carbon coated hexagonal boron nitride with a core-shell structure is obtained by the aid of steps of stirring,extracting, leaching, drying and carbonizing at high temperature, wherein, a core is the hexagonal boron nitride, and carbon is a shell. When the method is used for preparing carbon coated hexagonal boron nitride, the raw materials are available easily, prices of the raw materials are cheap, inclusive compound of the hexagonal boron nitride has the core-shell structure, the hexagonal boron nitride is the core, the carbon is the shell, sizes of products are uniform, specific surface areas are large, and the products have excellent dispersibility when added to base oil or high-polymer resin, and still have an excellent mechanical performance and excellent abrasion resistance when in extreme environments with high temperature and high pressure.

The invention discloses a method for powder metallurgy preparation of a self-lubricating bearing material, belonging to the field of lubricating materials. According to the method, a traditional powder metallurgy method is adopted, and the method comprises the following steps of: mixing and annealing iron powder with an appropriate amount of iron sulfide, ferromanganese powder and alloy powder; mixing the annealed powder with an appropriate amount of graphite; pressing and sintering to obtain the self-lubricating bearing material. The raw materials are inexpensive, the process is simple, the parameters are easy to control, and the production process is safe and environment-friendly, so that the method is suitable for large-scale industrial production. In the annealing process, the mixed powder reacts to generate FeS and MnS, and good lubricating and antifriction effects are achieved; meanwhile, the existence of MnS can significantly improve the cutting performance of the bearing material and reduce the abrasion of a cutter. The self-lubricating bearing material prepared by the method disclosed by the invention can be widely applied to mechanical equipment for iron and steel, metallurgy, energy sources and the like, and is particularly suitable for occasions requiring oil-free lubrication.

The invention discloses a method for preparing tungsten diselenide nano sheets, comprising the following steps of: evenly mixing tungsten powder and selenium powder in a certain mol ratio; heating and reacting the mixture under protection of argon, and cooling to obtain the tungsten diselenide nano sheets. The tungsten diselenide nano sheet is of an inorganic nano sheet laminated structure; the tungsten diselenide nano sheet has excellent dispersion performance and friction performance in base oil and polymer compounds; the tungsten diselenide nano sheet is simple in preparing method, safe, environment friendly, high in production rate, low in cost and suitable for large-scale industrial production.

The invention discloses a method for producing a furan ammonium salt by using furoic acid. The method comprises the following steps of: (1) chlorination: putting furoic acid and chlorohydrocarbon solvent into an enameled glass reaction kettle, controlling temperature and time, and obtaining a furoyl chloride product; (2) cyanation: putting the furoyl chloride and sodium cyanide into the reaction kettle, stirring, preserving heat, reducing pressure, and reclaiming the solvent to obtain a furoyl nitrile product; (3) hydrolysis: heating the furoyl nitrile and hydrochloric acid, and obtaining furan ketone acid after the reaction is finished; (4) condensation: adding ethyl acetate extract of the furan ketone acid serving as the hydrolysis product into the reaction kettle, dropping methoxyamine to perform room temperature reaction with the hydrolysis product, and demixing, wherein the oil layer is used for ammoniation reaction; and (5) ammoniation: introducing ammonia gas into the oil layer reactant, controlling the temperature, stirring, finishing gas introduction, centrifuging, and drying to obtain the furan ammonium salt. The method is simple and convenient, is convenient to operate, reduces the production cost, improves the yield, makes full use of raw materials, and is safe and reliable in the production process.

The invention discloses a preparation method of a tin antimony oxide nano-powder. The method comprises the following technical steps: (1), dissolving inorganic tin salts and inorganic antimony salts in diluted hydrochloric acid and gradually adding an alkali solution to the diluted hydrochloric acid in the stirring process until tin ions and antimony ions are completely deposited, so as to obtain a tin hydroxide and antimony hydroxide precursor; (2), filtering, separating and washing the tin hydroxide and antimony hydroxide precursor; (3), adding water and a dispersing agent to the tin hydroxide and antimony hydroxide precursor; and after uniformly stirring, continuously stirring and reacting the tin hydroxide and antimony hydroxide precursor in a hydrothermal reaction kettle at the temperature of 150-250 DEG C so as to obtain a nanometer paste; and (4), after separating and drying the nanometer paste, calcining the nanometer paste and crushing the nanometer paste by airflow so as to obtain the tin antimony oxide nano-powder. Through adoption of the preparation method disclosed by the invention, requirements of production process on equipment are effectively reduced; and a nanometer material with high performance and high purity is obtained.

The invention discloses a solid lubricating oil additive MoSe2 nanosheet and a preparation method thereof. Molybdenum powder and selenium powder are used as main raw materials to directly prepare the solid lubricating oil additive MoSe2 nanosheet through one-step solid phase reaction. The method of the invention has the advantages of easy acquisition of raw materials, low cost of raw materials, simple preparation technology, easy control of parameters and safe and environment-friendly production processes, and is especially suitable for large-scale industrial production. The solid lubricating oil additive MoSe2 nanosheet prepared by the method of the invention has the advantages of good crystallization, high purity and excellent lubricating property.

The invention belongs to the field of sewage treatment, and discloses a high-efficiency slow-release carbon source modified corn cob, a preparation method and application thereof, wherein a slow-release carbon source is prepared by modifying 8-10 parts by weight of corn cob with 80-90 parts by weight of alkaline hydrogen peroxide, and the preparation method is simple and quick, low in cost, and good in treatment effect. The prepared high-efficiency slow-release carbon source modified corn cob is loose in structure and increased in surface area, has a porous structure, and has a particle diameter of 8-12 mm and a density of 0.3-0.6 g / cm<3>; when the high-efficiency slow-release carbon source modified corn cob is applied to denitrification biofilters, the removal rate of nitrate nitrogen isas high as 90% or more than 90%.

The invention discloses a high-strength abrasion-resistant PA 66 (polyamide 66) composite material. The high-strength abrasion-resistant PA 66 composite material comprises, by weight, 70-100 parts ofnylon resin, 10-40 parts of aromatic nylon resin, 5-30 parts of abrasion-resistant agents, 0.5-2 parts of black color master batch, 30-90 parts of chopped fibers, 0.3-1 part of antioxidants, 0.3-1 part of lubricants and 0.3-1 part of flow modifiers. The invention further discloses a method for preparing the high-strength abrasion-resistant PA 66 composite material. The high-strength abrasion-resistant PA 66 composite material and the method have the advantages of high tensile strength and bending modulus, low friction coefficient and the like.

The invention discloses a copper-based electric contact material containing graphene / molybdenum disulfide heterojunctions and a preparation method of the copper-based electric contact material and belongs to the technical field of metal matrix self-lubricating materials. Firstly, graphene serves as the base, sodium molybdate serves as a molybdenum source, thiourea serves as a sulfur source, hydroxylamine hydrochloride serves as a reduction agent, cetyltrimethyl ammonium bromide (CTAB) serves as a surface active agent, and a graphene / molybdenum disulfide heterojunction material is compounded through a hydrothermal method according to a certain proportion; and then copper powder serves as a matrix, and through the matching with heterojunction materials of different proportions, the copper-based electric contact material is obtained by means of a powder metallurgy technique through mixing, cold pressing and vacuum sintering. According to the copper-based electric contact material containing graphene / molybdenum disulfide heterojunctions and the preparation method of the copper-based electric contact material, the excellent mechanical properties and electrical properties of graphene as well as the characteristic of small density are utilized, through the cooperation of the excellent lubricating property of molybdenum disulfide, the hardness and the lubricating property of the material are improved while guaranteeing the conductivity of the composite material, and the specific gravity of the material is reduced; and in addition, the technique is simple, the cost is low, and the obtained composite material has great development prospects in the aspect of self-lubricating electric contact.

The invention relates to a method for treating and utilizing agricultural solid waste through aerobic high-temperature hydrolysis and fermentation, which comprises the following treatment steps: a, mixing shorn and crushed crop straws with livestock / poultry dung, squeezing the mixture to carry out liquid-solid separation, soaking the solid residue obtained in the first squeezing procedure, and further squeezing to carry out liquid-solid separation; b, mixing the liquids obtained in the two squeezing procedures in the step a, inoculating with active sludge, hydrolyzing and fermenting the mixed liquid in the presence of hot air for a fermentation period of 1-10 days, carrying out vacuum concentration, and cooling to obtain a compound microbial inoculum product; and c, hydrolyzing and fermenting the squeezed residue obtained in the step a in the presence of hot air, drying in the presence of hot air, cooling, and bagging to obtain the low-humification stable-state carbon source organic substance product. By fully using a large amount of agriculturally-produced crop straws and large-scale produced livestock / poultry dung, the method can be used for recycling multiple kinds of agricultural organic waste, thereby changing the waste into valuables, and reducing the possible secondary environment pollution.

The invention provides a powdery casting coating as well as a preparation method and a use method thereof. The powdery casting coating provided by the invention is composed of the following components in percentage by weight: 89-92% of refractory aggregates, 2.6-3.6% of sodium bentonite, 0.64-1.3% of rosin, 0.58-0.75% of polyvinyl butyral, 0.15-0.25% of hydroxypropyl methyl cellulose, and 4.0-5.1% of water. The powdery casting coating provided by the invention is alcohol-free, and capable of being mutually infiltrated and fused with alcohol in use to obtain a qualified coating.

The invention belongs to the technical field of papermaking, relates to a production method for craft paper, and aims to solve the problem of difficulty in the production of feather-weight, strong-strength and high-whiteness craft paper under the condition of not using wood pulp. The production method for the craft paper comprises steps of a MOW pretreatment step for forming surface pulp and lining pulp, an OCC pretreatment step for forming core pulp and prime pulp, and a step for subsequently treating the surface pulp, the lining pulp, the core pulp and the prime pulp, and is characterized in that the MOW pretreatment step comprises the following steps: a, simultaneously performing pulping and biological enzyme deinking on MOW, and b, performing heat dispersion on MOW, wherein the step a comprises a step of adding 1,600 to 1,800 IU / ml cellulase, Na2SiO3 and NaOH into MOW pulp at the mass concentration of 10 to 15 percent for pulping under the condition of 40 to 50 DEG C, wherein the mass concentration of the cellulase, the Na2SiO3 and the NaOH is 0.01 to 0.05 percent, 0.5 to 1.0 percent and 0.5 to 1.0 percent respectively, and the pulping time is 10 to 20 min. Due to the adoption of the technical scheme, the method can effectively solve the technical problem.

The invention discloses a method of preparing natural milk-flavored essence by virtue of enzymatic hydrolysis of double enzymes and fermentation of multiple microorganisms, with natural cream as a raw material. The method comprises the following operating steps of melting the cream; adding a medium and an emulsifier; carrying out homogeneous emulsification; carrying out pasteuring; carrying out enzymatic hydrolysis of the double enzymes, anddeactivating the double enzymes; carrying out fermentation of the microorganisms, and drying to prepare the milk-flavored essence. With the adoption of the method, the enzymatic hydrolysis time is shortened; middle-and-short-chain fatty acids of C4-C12 are generated; meanwhile, as milk proteins are hydrolyzed into flavor such as polypeptide and amino acid by virtue of protease to form a unique milk flavor, the strong, pleasure and lasting feelings of the taste of the milk in the essence are strengthened, and the bitterness and the wax taste caused by the middle-and-short-chain fatty acids are eliminated; by virtue of the fermentation of multiple microorganisms, flavor compounds are increased; as a great deal of lactic acids are generated due to the fermentation of lactic acid bacillus, the flavor and the taste can be improved to form diversified acides and milk flavors, and the fragrance is further softened. The natural milk-flavored essence prepared according to the invention is pure and soft in fragrance and is strong in milk flavor; and compared with the natural cream without treatment, the fragrance of the natural milk-flavored essence can be strengthened by 20-300 times.

The invention discloses a preparation method of a tungsten diselenide nano-clathrate. The preparation method is as follows: tungsten powder and selenium powder which are in a certain molar ratio and graphite are used, absolute alcohol is added to prepare raw material mixture, the mixture is processed to form paste, and the paste performs solid-phase synthesis under a certain condition to obtain the tungsten diselenide nano-clathrate with a core-shell structure. The product has uniform size and large specific surface area; the product still has good mechanical properties and wear resistance under extreme conditions such as high temperature and high pressure and has good dispersibility in macromolecular composite and other composites; and the product is a lubricating material with good performance, has simple preparation process, controllable parameters and safe and environmentally friendly production process and is particularly suitable for large-scale industrial production.

The invention relates to a method for manufacturing nano antimony doped tin oxide, which comprises the following steps of: performing complete thermal decomposition on a mixture of organic precursor tinoxalate of a tin and an antimonial substance at 250 to 800 DEG C; oxidizing and baking the rough product of the antimony doped tin oxide after the thermal decomposition at 800 to 1,500 DEG C for 15 to 90 minutes after completely and uniformly stirring the rough product to obtain the blue nano antimony doped tin oxide. The method avoids toxic hazardous chemical, such as chlorine and nitric acid, and a combustible and explosive organic solvent, so no pollutant is discharged in the whole production process. The method has the advantages of simple process and equipment, safe and environmentally-friendly production process and low production cost, and creates conditions for the industrial production with safety and low cost.

The invention provides a preparation method of a visible-light-driven photocatalyst nano spherical MoSe2 material. The preparation method comprises the following steps: weighing sodium molybdate and organic selenium source selenium sodium cyanoacetate, dissolving sodium molybdate in deionized water to prepare a sodium molybdate solution, dissolving the selenium sodium cyanoacetate in glycol to prepare a selenium sodium cyanoacetate solution, mixing and fully stirring the sodium molybdate solution and the selenium sodium cyanoacetate solution until the solutions are clear and uniformly mixed to prepare mixed liquor; transferring the mixed liquor to a high-pressure reaction kettle using teflon as the lining, and heating in a water bath to obtain a reaction product; centrifuging the reaction product through a centrifugal machine, collecting the lower precipitate and washing by deionized water and ethyl alcohol; drying the washed product and carrying out annealing treatment by a vacuum tube furnace in inert atmosphere to prepare the nano spherical MoSe2 material. The preparation method overcomes the defects in the prior art, and is safe and environment-friendly in the production process and particularly suitable for large-scale industrial production.

The invention discloses a preparation method of a lithium ion battery anode material lithium fluoborate. The preparation method comprises the following steps: (1), mixing a lithium source, an iron source, a boron source and a chelating agent according to the condition that the molar ratio of Li, Fe, B and C is (1-1.05):1:1:(0.5-1.5), adding the mixture into water for dissolving, and controlling the concentration of metal ions at 0.1-0.8mol / L<-1> to obtain liquor; (2), stirring in constant-temperature water bath to form sol; (3), stewing at the constant temperature to form gel; (4), adding water into the gel, and stirring; (5), spraying and drying to obtain a precursor; (6), sintering the precursor for 1.5 hours-2.5 hours at 250 DEG C-350 DEG C in a non-oxidizing atmosphere, then, heating up to 450 DEG C-550 DEG C, sintering for 5 hours-12 hours, and naturally cooling to the room temperature, thereby obtaining LiFeBO3. According to the preparation method disclosed by the invention, material resource is extensive, the operation is simple, convenient and easy to implement, the controllability is strong, the sintering temperature is low and the production cost is low.

The invention discloses a reinforced flame-retarding PA6 / POK (Polyamide 6 / Polyketone) alloy material. The reinforced flame-retarding PA6 / POK alloy material is characterized by being prepared from thefollowing components in parts by weight: 50 to 90 parts of nylon resin, 10 to 50 parts of polyketone resin, 10 to 20 parts of a flame retardant, 4 to 8 parts of a flame-retarding synergist, 3 to 6 parts of a compatilizer, 20 to 35 parts of chopped fibers, 0.35 to 0.65 part of an antioxidant and 0.4 to 0.7 part of a lubricant. The invention further discloses a preparation method of the reinforced flame-retarding PA6 / POK alloy material. The alloy material disclosed by the invention has the characteristics of low water absorption ratio, high wet-state volume resistivity, stable size, good mechanical properties, good environment friendliness and the like.

The invention relates to the field of environment-friendly energy-saving building materials, and discloses a color self-cleaning glass. The color self-cleaning glass adopts a three-layer structure comprising a medium layer 1 which is a self-cleaning coating and mainly made of titanium oxide, a medium layer 2 which is a specific-thickness coating, mixed from magnesium fluoride and yttrium oxide, coated through methods of electron beam evaporation, magnetron sputtering, PECVD or the like to enable glass to show various colors of blue, green, brick red, brown, purple, gray and the like, and a base layer which is plate glass or hot bending glass. The hot bending glass is accomplished for the first time through a film coating method, and a gap of the high-end building materials is filled up. The color of the glass can be adjusted simply and conveniently, various special colors and gradient color can be realized in small batch, the cost is low, the self-cleaning outer surface has good weatherability, and the color of the glass is durable.

The invention discloses self-cleaning glass which has high visible light transmittance and high infrared ray reflectivity. The self-cleaning glass is provided with a cladding layer prepared by a magnetron sputtering processes on one side, and the cladding layer structurally comprises a medium layer 1, a medium layer 2, a medium layer 3 and a glass substrate layer, wherein the medium layer 1 adopts a rare earth element-containing titanium oxide layer with the thickness of 15-200nm, the medium layer 2 adopts a titanium oxide / silicon oxide blend layer with the thickness of 10-150nm, and the medium layer 3 adopts a metal oxide or metal fluoride layer with the thickness of 5-350nm. By the magnetron sputtering processes, the whole production process of the self-cleaning glass is safe, environment-friendly and free of pollution to the environment; by adopting a structural design of a glass film layer, the surface water contact angle is less than 2 degrees, and in a visible light waveband, the light transmittance is 2% higher and the visible light reflectivity is 5% lower than those of cladding-layer-free glass with the same specification respectively; the self-cleaning glass has the infrared reflectivity of 70%; through a design of a film system of the cladding layer, the self-cleaning glass provided by the invention overcomes contradictions of the conventional titanium-oxide-coating self-cleaning glass in aspects of high light transmittance and low radiation, and can be widely used as a high-end building material and photovoltaic glass.

The application relates to the field of conductive pastes, in particular to a graphene conductive paste. The graphene conductive paste comprises the following components, by weight: 1 to 10 parts of epoxy-functionalized graphene, 4 to 15 parts of epoxy resin, 2 to 6 parts of epoxy-modified siloxane, 2 to 6 parts of epoxy reactive diluents, and 0.1 to 0.8 parts of latent curing agents. Furthermore,the graphene conductive paste also includes 5 to 20 pars, by weight, of conductive black modified with a silane coupling agent. In addition, the application also provides a method for preparing the graphene conductive paste. The method includes: carrying out epoxy functionalization of graphene powder; carrying out epoxy modification of siloxane; carrying out mixing and stirring of all components;and carrying out conductive black modification. According to the graphene conductive paste provided by the application, the high dispersibility of graphene and good adhesion of the conductive paste are realized; and with the conductive black, the amount of graphene is reduced and the cost is lowered.

The invention provides a filtering material and a preparation method of the filtering material. Through taking a solidifying paper as a base substrate and depositing a PBT (olybutylece terephthalate) fiber film on the base substrate, the prepared filtering material has good waterproof and oilproof performances, and can be used under the high temperature condition, thus the technical problems that waterproof, oilproof, and precision performances of the existed filtering paper are bad, and the filtering paper cannot meet a high-performance filter are solved. The preparation method takes wood pulp enriched in wood pulp cellulose, glass fiber and other fiber materials and the glass fiber as the raw material, and prepares the base substrate through drying and solidifying, sprays the PBT material on the base substrate and thus the filtering material is obtained; the preparation method is fast and convenient; the prepared filtering material is waterproof, oilproof, and has accurate performance, and others.

The invention discloses a method for preparing carbon aerogel by using waste seaweed residues as a raw material, which comprises the following steps: separating and purifying industrial waste seaweedresidues to obtain seaweed cellulose, and carrying out sol-gel, vacuum freeze drying and high-temperature carbonization processes to finally obtain the carbon aerogel with a controllable structure. The carbon aerogel does not contain substances harmful to organisms or polluting the environment, so that the problems of high raw material cost and limited application range of the existing carbon aerogel are solved, and the problem of high-added-value development and utilization of the waste seaweed residues is also solved. The method is simple to operate and short in preparation period, the material structure is controllable, the production process is environment-friendly and safe, and the method is suitable for large-scale industrial production.

The invention discloses a synthetic method of 5-(N-ethyl-N-2-ethylol amine)-2-amylamine. The method comprises the following steps: (1) the preparation of a catalyst, to be specific, dispersing and dissolving nitrate into an organic solvent, adding oxide or nanopowder of carbonate into the organic solvent, after ultrasonic stirring, evaporating the organic solvent to dryness, carrying out vacuum drying and grinding the dried solvent into fine powder to obtain the catalyst; (2) adding xylene, 5-chlorine-2-pentanone and N-ethylethanolamine in a reaction flask in sequence, stirring the materials, adding the prepared catalyst, heating the flask to increase the temperature till reflux occurs, cooling the heated materials to room temperature, filtering the materials to obtain a filtrate, fractionating the filtrate to obtain 5-(N-ethyl-N-2-ethylol amine)-2-pentanone; (3) putting 5-(N-ethyl-N-2-ethylol amine)-2-pentanone in a hydrogenation flask, adding aminomethanol and raney nickel to perform reaction under hydrogen pressure; after the reaction, displacing the hydrogen and ammonia in the system with nitrogen, filtering the reaction liquid to obtain a filtrate, fractionating the filtrate to obtain 5-(N-ethyl-N-2-ethylol amine)-2-amylamine. The method is high in conversion rate, simple and convenient to operate, high in yield, low in cost, easy for industrial production, safe and environment-friendly.

The invention discloses a biogenic pesticide containing xanthoxylin and abamectin and a preparation method thereof. The biogenic pesticide is used for killing insects; and the biogenic pesticide containing the xanthoxylin and the abamectin is formed from the following components in parts by weight: 0.01-12.9 parts of the xanthoxylin, 0.1-10 parts of the abamectin, 0.5-5 parts of a synergist, 0.1-5 parts of a sterilizing agent, 1-20 parts of an emulsifying agent, 1-30 parts of plant oil, 1-8 parts of an anti-freezing agent, 0.1-2 parts of a thickening agent and 20-70 parts of water. According to the biogenic pesticide disclosed by the invention, any chemical solvent does not need to be added into effective components of the biogenic pesticide; the water-based preparation can be widely applied to prevention and treatment of insect pests of places with relatively concentrated people, such as parks, green lands, streets, and family gardens; and the biogenic pesticide is also applicable to the prevention and the treatment of fowl and livestock fur injurious insects. A production process of the xanthoxylin does not use an organic solvent; and extracted pepper fruit waste dregs are composted and fermented and are returned back to fields to be used as a base fertilizer to be applied. In the whole product production process, the energy consumption is low, and equipment investment is small and the occupying area is small; and sources of raw and auxiliary materials are wide and are easy to obtain.

The invention provides silane modified polylactic acid as well as a preparation method and application thereof. The silane modified polylactic acid can be used for preparing an adhesive with degradability. The invention provides a preparation method of the silane modified polylactic acid, which comprises the following steps: (1) reacting polyether polyol with lactide to prepare polylactic acid polyol; (2) reacting the polylactic acid polyol prepared in the step (1) with an epoxy compound to prepare low-acid-value polylactic acid polyol, and (3) reacting the low-acid-value polylactic acid polyol prepared in the step (2) with alkoxy silane containing isocyanate groups to prepare the silane modified polylactic acid.

The invention discloses an efficient non-toxic pesticide which is characterized by comprising the following raw materials by weight: 5-12 parts of rheum officinale, 8-18 parts of pepper, 5-10 parts of garlic, 3-6 parts of rhizoma polygonati, 6-8 parts of matrine, 4-8 parts of copper nitrate, 2-5 parts of acetic acid, 3-5 parts of chitin and 8-20 parts of water. The invention provides the efficient non-toxic pesticide and its preparation method, the efficient non-toxic pesticide is non-toxic and harmless to people and livestock, is non-pollution to the environment and crops, and is safe to use, and the pesticide efficacy lasts for a long time.

This invention discloses a method for producing laccase by fungi co-culture. The method comprises: inoculating the suspension of Trametes sp. AH28-2 into a fermentation culture medium, culturing at 22-37 deg.C for 1-4 days, adding the suspension of Trichoderma sp. ZH1, culturing for 5-10 days, and separating to obtain laccase agent with living laccase content 6,000 U / L. The culture medium is liquid culture medium, and mainly comprises certain amounts of carbon source, nitrogen source, phosphates of potassium and sodium, sulfates of copper and iron, adenine and vitamin B. The method avoids aromatic compounds and heavy metal ions to induce, thus is safe and environmentally friendly, and has high and stable laccase activity.