667results about How to "Strong persistence" patented technology

The invention relates to a temperature-resistant salt-resistant composite foam oil displacement agent for tertiary oil recovery and a preparation method thereof, belonging to the field of chemical oil displacement for increasing the crude oil recovery ratio of the oil field. The oil displacement agent is compounded by 0.5-1% of alpha-alkene sulfonate as a main surfactant and other auxiliary agents and comprises the following components in percentage by mass:0.1-1.5% of anionic surfactant, 0.2-0.8% of zwitterionic surfactant, 2-10% of organic solvent, 5-12% of stabilizing agent and the balance of a salt solution added to be 100%. Compounds related to the oil displacement agent are industrially produced fine chemical products, the raw materials are easy to obtain, the production cost is low, and the preparation is simple; the oil displacement agent has performances of temperature resistance, salt resistance, ultralow interfacial tension and the like; the persistence of the foam is strong, and the half-life period can be more than 120min at 85 DEG C; the oil displacement age has excellent compatibility with other surfactants, and the comprehensive recovery ratio of the crude oil can be increased by about 10-15%.

The invention discloses a workpiece stamping intelligent control process. The workpiece stamping intelligent control process controls automatically and satisfies all actions to be operated coherently to effectively improve working efficiency, no manual work is needed, safety is improved and cost is effectively saved. Product quality is guaranteed to enable products to meet market demands. The invention further provides an intelligent control manipulator implementing the process. Through an efficient, accurate, flexible, safe operation mode flexible in design, the intelligent control manipulator is convenient to operate, production efficiency is greatly improved, structural design is reasonable, design mode is flexible, effects are obvious, process persistence is high, raw materials are saved and energy consumption is quite low; a regulation and control type industrial control process satisfies different demands, the structural design enhances smoothness, swing precision is guaranteed, and machining process is guaranteed to be completed automatically, continuously and effectively; and conventional manual or semi-automatic machining modes are replaced, and resources are saved.

The invention discloses a PD-1 gene recombinant virus. The collection number of the recombinant virus Lenti-PD-1-Puro is CCTCC No:V201601. According to the PD-1 gene recombinant virus, PD-1gRNA sequences are cloned into a retrovirus plasmid Lenti-CRISPR / Cas9-Puro, and a PD-1 recombinant virus plasmid Lenti-CRISPR / Cas9-PD-1-Puro is obtained; then the PD-1 recombinant virus plasmid Lenti-CRISPR / Cas9-PD-1-Puro, a plasmid pSPAX and pMD2.G are jointly transfected by 293T cells, and packaging of the recombinant virus Lenti-PD-1-Puro is completed. After T cells of peripheral blood of tumor patients are infected by the PD-1 recombinant virus, PD-1 on the T cells is successfully knocked out, the inhibitory state of the T cells of the tumor patients is relieved, the capacity of attacking tumor cells of the T cells embellished by the PD-1 recombinant virus is recovered accordingly, and the effect of immune cell treating is achieved.

The present invention adopts special dispersion technological process and nano treatment process to make the material capable of releasing negative ions into a nano negative ion powder pulp, then adds the nano negative ion powder pulp to paint so as to obtain a long-acting stable air-purifying paint. Said paint can effectively decompose harmful gases in the air, such as formaldehyde, benzene, dimethylbenzene and nitrogen oxide, etc, and the harmful gas removing rate can be up to above 90%, and can automatically release negative ions for a long period. Its paint solid content is 20-70 wt%, and negative ion powder content is 1-10 wt%.

The invention discloses a polyurethane foam supported liver / graphene / titanium dioxide nano particle composite material, a preparation method thereof and an application thereof. The material is a three-dimensional structure which is specifically that sliver / graphene / titanium dioxide ternary nano particles are uniformly loaded in the surface and a base body of the polyurethane foam. The preparation method comprises: preparing graphene / titanium dioxide binary nano particles; adding silver nitrate to carry out silver ion modification, thereby preparing silver / graphene / titanium dioxide ternary nano particles; and finally, quickly mixing and stirring a mixed solution of the silver / graphene / titanium dioxide nano particles and diphenyl methylpropane diisocyanate with a mixed solution of polyether polyol and dichloromethane, thereby preparing the polyurethane foam supported liver / graphene / titanium dioxide ternary nano particle composite material. The material provided by the invention has strong adsorption effect, and can degrade oil pollutants on the surface of a water body under irradiation of visible light, thereby achieving great potential in surface water remediation.

This invention relates to method and reactor for removing organic matters, sulfides and nitrates from wastewater simultaneously. The method solves the problems of high cost and easy secondary pollution faced by the present technique in treating sulfur and nitrogen-containing wastewater. The method utilizes sulfur-autotrophic denitrifying bacteria and sulfur-heterotrophic denitrifying bacteria biological membrane to treat wastewater. The reactor is a fixed bed biological membrane reactor. The filler is lava or activated carbon. A reaction zone is formed at the middle and lower part of the inner cavity of the cylinder, while a precipitation zone is formed at the upper part. A gas collection zone is formed at the middle and lower part of the inner cavity of the gas collection chamber, while a water storage zone is formed between the bottom of the gas collection chamber and the flush weir. The method has such advantages as high treatment efficiency, no secondary pollution, low running cost, and low sludge productivity. The reactor has such advantages as small floor area and easy operation. The reactor can be continuously operated, and can be solely used or used as one treatment unit for wastewater treatment.

The invention provides a method and a system of drug inventory management. The method particularly includes that S01, basic information, safe inventory days A and maximum inventory days B of the drugs are acquired by the system; S02, a daily consumption C of the drugs within a month is acquired by the system; S03, profits D, a saving cost E and a purchasing cost F of the drugs are acquired by the system; S04, a purchasing cycle and an average purchasing quantity of the drugs are calculated according to above data; S05, a difference value between an interval between the last purchasing time and now and the purchasing cycle is calculated, if the difference value is lower than a prompt deadline, the basic information, the next purchasing time and the average purchasing quantity of the drugs are fed back to the manager. According to technique scheme, based on variable parameters of the drugs, a best purchasing scheme can be acquired on the basis of the drugs daily consumption in the cycle, and the clear purchasing cycle and purchasing quantity can be calculated so as to achieve maximum daily profit of the drugs. The method and the system are adaptable to the management of all hospital drugs.

The invention relates to an injectable temperature sensitive gel used for filling and repairing damaged tissues. The gel is characterized in that: medical-grade hyaluronic acid and chitosan are used as gel raw materials; the gel swelling ratio is 2-500; and a temperature sensitive temperature is 32-37 DEG C. The gel provided by the invention has the advantages that the injection temperature sensitive gel has physical and chemical properties of a general gel, also has injectable and temperature sensitive properties and a good fluidity at a room temperature and is easy for injection; the formability in organisms is good and the degradation is slow so that the general gel can not be compared; a cross-linking agent is not used for the gel so that harms of the cross-linking agent to a human body are avoided; a gel system can prolong a persistence time of the gel in a body, and also can continuously stimulate the body to produce reactions so that the tissue in-situ regeneration and repair is promoted and the filling quality is increased; and the gel simultaneously has the advantages of reducing bacterial invansion, anticoagulation and low allergic reaction and the like.

The invention discloses a method for preparing a medical polymer material by an ion implantation technique; the method obtains the medical polymer material with surface infection resistance and biocompatibility by the following steps of fixing the medical polymer material on or moving the medical polymer material through a treatment table of ion implantation equipment, vacuum-pumping, introducing gas, turning on the power supply of the ion implantation equipment, and performing treatment. The method is simple in operation, and does not influence the physical-chemical structure of the material body; the treated polymer material is stable in surface structure, has long-acting and wide-spectrum infection resistance, and has cytocompatibility not lower than the inherent biocompatibility of the material itself.

The invention discloses a method and a system for denitrifying low-carbon high-nitrogen sewage by utilizing a plant carbon source-enhanced artificial wetland. The method comprises the following steps: hydrolyzing by taking waste crops or wetland plant straws as carbon sources, and charging hydrolysate into an artificial wetland so as to improve the denitrification efficiency of the low-carbon high-nitrogen sewage. The invention simultaneously provides a treatment system, which is simple in structure, and scientific and reasonable in carbon source charging mode, and the denitrification effect of the low-carbon high-nitrogen sewage can be well realized by enhancing the artificial wetland through utilizing the plant carbon source. According to the method, the adopted plant carbon sources are cheap and easily available, the carbon release capability is strong, the bio-denitrification effect is good, and the hydrolysate is simple and practical to prepare, the carbon source charging mode is strong in continuous running capability, and the method is simple to maintain, less in secondary pollution, low in production cost, and capable of solving the technical difficulty of treating tail water in a sewage treatment plant with low carbon nitrogen ratio through artificial wetland by utilizing a simple method.

The invention discloses a self-repairing super-hydrophobic composite material, a preparation method and application thereof. The composite material has a structural general formula of: APA / M-PD / APA@HMS, wherein, APA is alkyl primary amine having a long carbon chain with C greater than or equal to 12, PD is polydopamine, HMS is hollow mesoporous SiO2 microsphere, APA@HMS refers to HMS loaded with APA, and the M refers to an antifouling able to stick on PD. The preparation method provided by the invention has the advantages of simple operation, and rich raw material sources, and is suitable for mass production. The prepared APA / M-PD / APA@HMS can be used as a paint additive, can endow a coating with super-hydrophobicity, antifouling property, self-repairability, and durability, and can be used for protective coatings of marine materials.

The invention belongs to the technical field of landscaping maintenance and particularly relates to a full-effect tree nutrition infusion liquid. The nutrition infusion liquid comprises a macroelement and a microelement needed for the tree growth, a coenzyme, an active protective agent, a soluble sugar, a plant growth hormone, a preservative, aspirin and water. The full-effect nutrition infusion liquid contains a high active protective agent, an antivirus stress-resistant factor, and is chelated with the macroelement and the microelement for the crops, a growth promoter, an antifungal bacterium active enzyme and other nutrient contents and adjusting factors. The nutrition infusion liquid is able to reach the purposes of supplementing the nutrient for the plantlet at one time, balancing the water in the plantlet and realizing explosive and rapid rooting. Besides, the nutrition infusion liquid has unique antimicrobial bactericidal protective effect, dehydration-resistant protective effect, anti-freeze protective effect and high-permeability resistant protective effect for the trees, is convenient to prepare and simple in condition, and is safe and reliable.

The invention relates to a functional nylon-6 fiber and a preparation method thereof. The fiber comprises branched-chain nylon-6 functional master batches and conventional nylon-6 chips, wherein the branched-chain nylon-6 functional master batches account for 6-10% in weight percentage; the preparation method comprises the steps of firstly, preparing the branched-chain nylon-6 functional master batches with an in-situ polymerization method or a blending method; secondly, crystallizing and drying the branched-chain nylon-6 functional master batches and the conventional nylon-6 chips respectively, and mixing, and then performing vacuum drying to obtain blended chips; and finally, performing melt spinning to the blended chips. The using amount of functional additives is reduced properly under a condition that the functionality is improved or kept, the production cost is reduced and the fiber spinnability is improved.

The invention provides a preparation method of a super-hydrophilic thin film based on a glass surface, relates to the super-hydrophilic thin film, and provides the preparation method of the super-hydrophilic thin film based on the glass surface, which has the advantages of simple needed equipment, few investment, wear resistance and long durability. The preparation method comprises the steps of: preparing SiO2 sol by an acid-alkali two-step method; diluting the SiO2 sol and adding polyethylene glycol; ultrasonically oscillating and coating the SiO2 sol on a glass substrate; and sintering to obtain the glass with the super-hydrophilic thin film on the surface. The preparation method has a simple process flow and few investment; and the obtained super-hydrophilic thin film has the characteristics that 1) light irradiation is not needed and the super hydrophilicity also exists at the hard part; 2) the super-hydrophilic thin film is super-hydrophilic and durable; the super-hydrophilic glass prepared by the method is placed indoors for three months and still has the super hydrophilicity after being detected; and 3) the bonding force of the film is firm and wear-resisting; and under the laboratory conditions, the thin film on the surface of the glass is forcedly brushed by a test tube brush and the result shows that the super-hydrophilic glass still has the super hydrophilicity.

The invention relates to an imidazoline asymmetrical bi-quaternary ammonium salt. The preparation method comprises the following steps that: diethylene triamine and organic acids of octalkyl to heptadecyl react to generate alkyl imidazoline; long chain alkyl tertiary amine, hydrochloride of long chain alkyl tertiary amine and epichlorohydrin react to generate N-(3-chlorine-hydroxypropyl)-N, N-dimethyl long chain alkyl quaternary ammonium salt; and the alkyl imidazoline and the N-(3-chlorine-hydroxypropyl)-N, N-dimethyl long chain alkyl quaternary ammonium salt react. When the salt is used as a carbon steel corrosion protection acid pickling inhibitor, the salt has the advantages of easy synthesis, low-priced and easily-bought materials; because the salt is the organic inhibitor, the salt is nontoxic and unharmful, and has wide biological activity and good water solubility and can effectively inhibit corrosion of metallic matrix in the acid and excessive consumption of acid liquor; moreover, the salt also has the advantages of low consumption, high efficiency, strong sustained action capability and good application prospect.

A carboxymethyl chitosan fruit fresh-keeping coating agent in the technical field of food engineering and a preparation method thereof. The fresh-keeping coating agent is: 0.5%-4% of carboxymethyl chitosan, 0.1-1% of glycerin, 0.3-2.4% of Tween 80, 0.1-1% of DL-α-tocopheryl acetate, 92% of water -99%. Heat water in a water bath to constant temperature, add carboxymethyl chitosan, stir until completely dissolved, then add glycerin, stir well with Tween, then add DL-α-tocopheryl acetate and stir until completely dissolved, let it sit at room temperature Cooling, followed by filtering to remove undissolved substances, degassing under vacuum, standing overnight at room temperature, degassing again under vacuum, standing at room temperature, and obtaining carboxymethyl chitosan fruit fresh-keeping coating agent. The fresh-keeping coating agent of the present invention is coated on the surface of fruits by soaking or spraying to form a fresh-keeping film and maintain the quality of the fruits during storage.

The invention discloses a novel efficient environment-friendly flocculant for the treatment of black-odor river. The flocculant comprises the following components in percentage by weight: 20-60% of PAC (Polyaluminium Chloride), 5-10% of unslaked lime, 5-10% of sodium carbonate, 10-30% of diatomaceous earth, 1-3% of chitosan, 2-5% of carboxymethyl starch (CMS), 1-3% of neutral protease and 10-25% of cement. the components of the flocculant disclosed by the invention are abundant, inexpensive, economical and environment-friendly; all the components are used together, the addition of the flocculant is small, the flocculant hardly affects the pH of the water and the original performances of the sludge in water are not changed; partially active heavy metals are cured, which is beneficial to increase of the activity of the sludge so that the self cleaning capacity of water bodies is greatly improved. The multiple functions such as adsorption, aggregation, chelation, curing and catalytic degradation are integrated into a whole to achieve a good treatment effect. The flocculated and settled water body is clear, transparent and odorless.

The invention discloses a video live broadcast test method and system. The method comprises the steps of obtaining a first key frame of an original live broadcast video stream and obtaining a second key frame within predetermined time before the appearing moment of the first key frame; extracting an image of a live broadcast video stream played by a terminal at the appearing moment of the first key frame, thereby obtaining a test image; obtaining a first similarity between the test image and the first key frame and obtaining a first similarity between the test image and the second key frame; and judging that the terminal plays normally if any one of the first similarity and the second similarity is not smaller than a predetermined value. According to the method and the system, through comparison of images of key frame screenshots of video key frame time points of the same live broadcast channel at the terminal and a server side, whether the problem of influencing the user experience due to overlong delay occurs in the live broadcast process of the terminal or not is judged.

The invention relates to a water base non-chrome zinc-aluminium coating and methods for preparing and using the same. The coating is prepared by proportionally mixing a component A and a component B; the component A contains 50-150g / L of lamellar metal powder, 145-290ml / L of organic solvent, 10-200ml / L of deionized water, 10-36ml / L of reducing agent and 5-15ml / L of wetting agent; and the component B contains 60-240ml / L of deionized water, 20-75ml / L of binding agent, 8-22ml / L of thickening agent, 4-8ml / L of silicon compound and the balance of the organic solvent. The method for preparing the water base non-chrome zinc-aluminium coating comprises the steps of: weighing the lamellar metal powder proportionally to be mixed uniformly, and then adding the organic solvent to be mixed uniformly for later use; mixing the reducing agent with the wetting agent, adding an appropriate amount of the deionized water to be mixed uniformly, and then adding the lamellar metal powder liquid to prepare the component A; proportionally weighing the thickening agent, the binding agent and the silicon compound, and adding the organic solvent to be mixed uniformly to prepare the component B; and mixing the prepared component A and the prepared component B according to the ratio of 2:1, and stirring unit uniform, thus obtaining the coating. The method for using the water base non-chrome zinc-aluminium coating is that the coating is coated on a part to be treated, and the baking temperature is increased to 360 DEG C so as to solidify and crosslink the coating to form a dense protective layer. The coating has the corrosion resistance which reaches 840 hours of a neutral salt spray test and over 96 hours of a heat resistance test, the usage amount of harmful substances is greatly reduced, and the working environment is improved.

The invention discloses a water-based ultraviolet-curing anti-fingerprint coating and a preparation method thereof, and belongs to the technical field of coating processing. The coating comprises, bymass, 12-22% of anti-staining resin, 12-44% of an aqueous ultraviolet-curing oligomer, 5-20% of an ultraviolet-curing monomer, 1-5% of a photoinitiator, 0.05-0.2% of a leveling agent, 0.05-0.2% of a wetting agent, 0-10% of a film forming additive and 20-69% of deionized water. The water-based ultraviolet-curing anti-fingerprint coating prepared through the certain preparation method by adopting the fluorine-containing or silicon-containing anti-staining resin and the aqueous ultraviolet oligomer as a main body adopts water as a dispersion medium, has the characteristics of low odor, non-flammability, low VOC content, washability and the like, reserves the advantages of short curing time, high production efficiency and low energy consumption of UV coatings, and meets the requirements of green and environmental laws and regulations; and a coating layer obtained by using the coating has the advantages of excellent anti-fingerprint effect and strong durability.

The invention relates to a compound biological deodorizer as well as a preparation method and application thereof. The compound biological deodorizer comprises a plant extract, pichia pastoris, pediococcus pentosaceus, pediococcus acidilactici, candida mycoderma and bacillus megatherium. Through the utilization of compound biological deodorizer to treat a waste transfer station, a livestock and poultry farm and a composting site, the NH3 removal rate can respectively reach 65.2-71.6%, 63.4-73.7% and 53.42-75.77%, and the H2S removal rate can reach 53.5-60.1%, 35.5-45.9% and 47.2-53.8%, so that the odor concentration is obviously reduced, the environment of the periphery of the waste transfer station, the livestock and poultry farm and the composting site is effectively improved, and the improvement of both economic benefits and environment-friendly benefits is facilitated.

A surface luminous body having at least a surface luminous element and a light regulating sheet characterized in that the light regulating sheet has a plurality of protrusions at least on one side thereof, and ends of the protrusions are in contact with an light outgoing surface of the surface luminous element via an adhesion layer, and the adhesion layer has one or more pressure-sensitive adhesion layers composed of one or more kinds of pressure-sensitive adhesives, and the ends of the protrusions are embedded partially into the adhesion layer, and the average thickness of the one or more pressure-sensitive adhesion layers between the ends of the protrusions and the light outgoing surface of the surface luminous element is less than 50% of the total thickness of at least one pressure-sensitive adhesion layer composed of at least one kind of pressure-sensitive adhesive.

The invention relates to a control technology specially used for preventing and controlling important forest pest bursaphelenchus xylophilus (monochamus alternatus), namely a microcapsule powder agent or a microcapsule suspending agent prepared by a highly-efficient, harmfulless and less-persistent neonicotinoid insecticide thiacloprid sustained-release preparation and assisted by a high-adhesionadhesive is adopted for prevention and control. The technology adopts an innocuous and degradable carrier as shell materials, is safe to environment, has excellent durable effect and solves the greatproblems of bursaphelenchus xylophilus prevention and control and chemical pesticide pollution.

The invention discloses a method for solving a water lock effect. By adopting the method, functional powder is added to a duct for producing a water lock, so as to remove the water lock. The functional powder is mixed powder formed by amphiphilic powder or super-hydrophilic powder and hydrophobic powder; the grain density of the functional powder is greater than 1 g / cm<3>; the mean grain size of the functional powder is smaller than 100 microns. The method disclosed by the invention is simple and feasible, convenient to operate, wide in material source, and low in cost. Meanwhile, the liquid-phase interfacial tension can be reduced by the functional powder in the using process of the method disclosed by the invention; the functional powder is in a small-granule solid state, so that the functional powder is easily left in a small hole or a gap in the rock surface, and has strong durability on inhibition of a damage of the water lock. In addition, compared with an acidification method, the flow-back effect of the method is greatly improved, so that the water lock effect can be better solved; the productivity of an oil well is greatly also improved.

The invention discloses a quartz stone anti-fouling agent and a preparation method and application thereof. The quartz stone anti-fouling agent comprises the following raw materials in percentage by mass: 6-16% of methyl hydrosilicone oil, 2-8% of hydroxyl-terminated polydimethylsiloxane, 0-5% of methyl silicone oil, 1-2% of cosolvent, 0.5-5% of silane coupling agent and 70-85% of solvent. The quartz stone anti-fouling agent is specially developed for coarse and porous quartz stone which is vulnerable to fouling; and by simply smearing the anti-fouling agent on the surface of the quartz stone, the quartz stone can be effectively protected from oil pens, ink, coffee, tea and other pollutants. The quartz stone anti-fouling agent disclosed by the invention is simple in preparation process, good in anti-fouling property and favorable in scrub resistance and durability, can not influence the surface gloss of the quartz stone, and is non-toxic and non-corrosive, thus not only being applicable to the quartz stone, but also being applicable to agglomerated stone, marble, matt tiles and the like.

The invention discloses a moldproof softening and brightening agent for cleaning leather and a preparation method thereof. The moldproof softening and brightening agent for cleaning leather is prepared from surfactant, brightener, oleic acid, animal fat leather greasing agent, fluorosilicon oil, triethanolamine, mold preventive, essence and deionized water in certain mass ratio. The preparation method comprises the following steps: preparing raw materials, mixing oil phases, mixing water phases, mixing oil and water, and filtering and filling. Due to the addition of the fluorosilicon oil and multiple assistants, the moldproof softening and brightening agent for cleaning leather has favorable effects on cleaning and nourishing leather, can endow the leather with the characteristics of smoothness, softness, water resistance, wear resistance, mold resistance and the like.

A surface luminous body including at least a surface luminous element arid a light regulating sheet, wherein the light regulating sheet includes a plurality of projections on at least one side, the ends of the projections are each in contact with the light outgoing surface of the surface light-emitting element via an adhesion layer, and a portion of the end of the projection is embedded in the adhesion layer, and wherein the adhesion layer includes a first pressure-sensitive adhesion layer A in contact with the surface luminous element, at least one resin layer, and a second pressure-sensitive adhesion layer B in contact with the light regulating sheet and a prism embedding load Fa of a pressure-sensitive adhesive used for the pressure-sensitive adhesion layer A, and a prism embedding load Fb of a pressure-sensitive adhesive used for the pressure-sensitive adhesion layer B are in a relationship of Fb / Fa≠1.

The invention relates to an ultrasonic algal-removing boat used for water bloom emergency treatment. The boat is loaded with an ultrasonic algal-removing device, adopts the sedimentation function of ultrasound on the blue-green algae of water to sedimentate the blue-green algae to the water bottom, is applied in the emergency treatment when the water bloom in the lake outbreaks and can reach the effect of removing floated blue-green algae on the surface of the lake. The boat of the invention comprises a catamaran (1) with an algae-laden water drainage channel (3), an ultrasonic transmitter array (2) and other parts, wherein the ultrasonic transmitter array (2) is arranged in the algae-laden water drainage channel (3) of the catamaran (1); and the ultrasonic transmitter array (2) radiates the ultrasound to act on the blue-green algae of water in the algae-laden water drainage channel (3) and ensure that the blue-green algae loses the floatability and is discharged and sedimentated to the water bottom under the action of a boat-pushing propeller (5), thus achieving the aim of removing the blue-green algae. The system is an environmental technology which adopts the ultrasonic technology to remove the blue-green algae of water body in water head site safely and economically.

A shellac fresh keeping fruit wax and its preparation method used for food engineering technology field. The components and weight ratio of the said shellac fresh keeping fruit wax of the present invention is: dewaxing bleached shellac 10 to 20 percent, ammonia 2 to 5 percent, poly (dimethylsiloxane) 0.005 to 0.01 percent, water 75 to 85 percent; quantifying and mixing water and ammonia according to the said ratio firstly to obtain the dilute ammonia, and then heating the dilute ammonia to 60 to 80 DEG C, putting the dewaxing bleached shellac into the dilute ammonia, processing the first time stirring, and then filtering first time, filtering out of the undissolved materials, adding poly (dimethylsiloxane) according to the said ratio and mixing, to obtain the crude liquid wax, keeping the crude wax liquid overnight, and filtering again, getting the shellac fresh keeping fruit wax. Spraying or soaking coating the shellac fresh keeping fruit wax of the present invention on the surface of fruits and vegetables to form fresh keeping film, increasing the gloss of the fruits surface.