53results about How to "Low cost and environmental protection" patented technology

The invention discloses a modified charcoal microballoon, and a preparation method and an application thereof. The preparation method for the modified charcoal microballoon comprises the following steps: (1) taking thalia dealbata powder, soaking in a soluble magnesium salt solution, filtering, taking out and then drying, thereby obtaining magnesium modified thalia dealbata powder; (2) carbonizing the thalia dealbata powder, thereby obtaining the modified charcoal; (3) taking the modified charcoal, and by taking a sodium alginate solution as an embedding medium and CaCl2 solution as a cross-linking agent, performing gel embedding and drying after embedding, thereby acquiring the modified charcoal microballoon. According to invention, the thalia dealbata powder is modified with magnesium at first, and then the modified thalia dealbata powder is taken as a precursor for carbonization, and lastly, the sodium alga acid solution is taken as the embedding medium for preparing the modified charcoal into microballoon; the obtained modified charcoal microballoon can effectively remove phosphorus from water and the removal rate is high; the abandoned thalia dealbata is recycled, so that the resource utilization of the wastes is realized.

The present invention is process of decomposing thermosetting epoxy resin and other composite material. The decomposing process includes the following steps: 1. feeding thermosetting epoxy resin or other composite material and water into reaction kettle; and 2. heating to compose the thermosetting epoxy resin or other composite material. The process has thermosetting epoxy resin or other composite material decomposing rate of 52-100 %, and the decomposed product may be reused as chemical material. After composite material is decomposed, the reinforcing fiber as the precipitate may be cleaned and stoved for reuse. The technological process of the present invention is simple, low in cost, high in composing rate, low in power consumption and environment friendly.

The invention discloses rice hull ash and metakaolin based polymer composite fireproof paint and a preparation method thereof. The paint mainly consists of rice hull ash and alkali-activated metakaolin based polymers. The preparation method comprises the steps that: rice hull ash is used as fillings with the mass parts being 20 to 50 mass parts; the alkali-activated metakaolin based polymers and polyvinyl acetate emulsion are compounded and prepared into adhesion agents with the mass parts being 20 to 40 mass parts; and other auxiliaries and special additives are added and mixed for preparingthe paint, wherein the auxiliaries and the special additives comprise the following ingredients in parts by mass: 0 to 10 parts of magnesium hydroxide, 4 to 8 parts of titanium pigment, 0.5 to 2 parts of sodium bentonite, 0.2 to 0.5 part of sodium lignosulphonate, 0.3 to 1 part of gamma-aminopropyl triethoxysilane and 0 to 5 parts of cellulose fibers. The paint and the preparation method have theadvantages that the raw material cost is low, in addition, the environment is protected, the preparation process is simple, and the bonding strength and the fireproof performance of products are good.

A preparation method of a graphite-phase carbon nitride sheet material comprises steps as follows: graphite-phase carbon nitride powder is provided, and the graphite-phase carbon nitride powder is flatly spread on a heated carrier; the heated carrier containing the graphite-phase carbon nitride powder is placed in a tubular furnace, the tubular furnace is heated to 150 DEG C-600 DEG C under the atmosphere of protective gas, the heated carrier containing the graphite-phase carbon nitride powder is kept at the temperature for 1 min-20 h in the ammonia gas atmosphere under negative pressure and finally cooled to the room temperature, and the graphite-phase carbon nitride sheet material is obtained. The invention further provides the graphite-phase carbon nitride sheet material prepared with the method.

The invention belongs to the technical field of soil improvement and particularly relates to a shell waste based soil improvement agent and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps: washing and drying shell wastes, and grinding to obtain a shell powder, carrying out a low-temperature hydrothermal reaction on corncob hydrolysis residues to prepare hydrothermal coke; performing high temperature carbonization in a nitrogen environment to obtain activated carbon, grinding to obtain an activated carbon powder, and respectively grinding phosphogypsum and flue gas desulfurization wastes to obtain a phosphogypsum powder and a flue gas desulfurization waste powder; finally, performing mixing granulation on the shell powder, the activated carbon powder, the phosphogypsum powder and the flue gas desulfurization waste powder, so as to obtain the shell waste based soil improvement agent. According to the preparation method disclosed by the invention, industrial and agricultural wastes are fully utilized as raw materials of the soil improvement agent, and the soil improvement agent is low in cost and environmental-friendly; theprepared soil improvement agent is capable of obviously improving the pH value of soil, improving soil hardening and increasing calcium-magnesium content in the soil.

The invention discloses a method for efficiently and fast removing antipyrine by using a MnOx / SBA-15-PMS compound system and application. The method comprises the following steps: (1) preparing MnOx / SBA-15(MS) compound materials under different synthesis conditions; (2) preparing a 0.5-50mg / L antipyrine target solution, and regulating the pH to 3-11; and (3) respectively adding a certain amount of MS compound material and potassium hydrogen sulfate (PMS) in the antipyrine target solution, and reacting under room temperature. The method disclosed by the invention firstly discovers that the MS-PMS catalytic oxidation compound system is capable of fast and effectively removing the antipyrine, and capable of maintaining high removal rate (more than 90%) under the reaction condition that the pH value change is large. The process is easy to operate, the process is simple and the equipment demand is low; the used MS compound catalytic material is easy to regenerate and recycle. The method disclosed by the invention can be widely applied to removing newly developed pollutant in the water environment, and has wide market application prospect.

The invention aims at solving the defect of being incendive in the existing acoustic board and discloses a flame retarding acoustic board, which comprises a board material body and plastic supporting structure that is inserted into the board material body; wherein, the board material body is prepared by a flame retarding polymer material which comprises the following components by weight percentage: 69.953 to 95.97 percent of methyl methacrylate monomer, 3 to 30 percent of fire retarding agents, 0.007 to 0.03 percent of evocating agents, 0.02 to 0.5 percent of ultraviolet radiation absorbent and 0.02 to 0.5 percent of hindered amine light stabilizer. The preparation method of the flame retardant acoustic board comprises the steps of preparing the flame retardant polymer material, surface treatment of the plastic supporting structure, mold preparation and casting molding process. The flame retardant acoustic board of the invention can not only meet the requirements of the acoustic board, but also have the function of being flame retardant; in addition, the preparation method of the invention not only has simple operation and is easy for industrial application, but also has low cost and environmental friendliness.

The invention discloses a method for making a queen-bee-to-be overwinter in an old wasp comb, and belongs to the insect breeding technology. A processed complete old comb shell is placed in an artificial overwintering box, and the queen-bee-to-be to hibernate is made to enter the comb to hibernate. By means of the method, it can be ensured that the queen-bee-to-be safely overwinters, the survival rate reaches 95% or above, an the method is a wasp breeding technology which is low in cost, capable of saving resources and high in economic benefit.

The invention discloses an oil-based drilling fluid blocking agent and a preparation method thereof. The oil-based drilling fluid blocking agent is prepared from a solid state mixture being 60 to 150meshes prepared by compounding oil-containing plant residue materials containing rich plant fiber and auxiliary materials accounting for 0.2 to 1 percent of the oil-containing plant residue materials,wherein the oil-containing plant residue materials are residue left after the grease removal from the oil-containing plant; the auxiliary materials are at least one kind of materials from calcium carbonate powder, magnesium stearate powder, talcum powder, superfine silica powder and calcium hydrophosphate powder with the mesh number being smaller than or equal to 60 meshes. The blocking agent isobtained through proportionally mixing the oil-containing plant residue materials and then performing drying, crushing, grinding and sieving. The preparation method is simple; the raw materials can beeasily obtained; the cost is low. The oil-based drilling fluid blocking agent has the characteristics of water absorption and oil absorption expansion, deformation capability, degradability, oleophilic performance and easy dispersion; the influence on the viscosity of the drilling fluid is small; waste materials can be reused; the cost is low; the environment is protected.

The invention belongs to the technical field of photoelectric detection, and particularly relates to a multi-channel total-silicon-based infrared thermoelectric detector and a manufacturing method thereof. The detector structure comprises an SOI substrate of which the top layer is n-type doped; a silicon nanowire array which is distributed in parallel and is prepared on the silicon oxide layer ofthe SOI substrate and in the top silicon; a two-dimensional metasurface constructed and integrated in the silicon nanowire array, wherein the metasurface is composed of a nanoscale metal antenna; a top contact electrode covering the two ends of the silicon nanowire array. The detection wave band of the detector is not limited by direct or indirect transition between semiconductor material bands ofa traditional detector, and the whole 1-3 [mu]m wave band can be covered. The problem that an total-silicon material cannot work in the infrared band with the wavelength larger than 1.1 microns is solved, complete compatibility and integration with a silicon-based CCD device or a CMOS reading circuit are achieved, the total-silicon material can be developed into an infrared photoelectric chip ofa multi-channel, high-resolution and a large-area focal plane pixel array, and the total-silicon material has wide application prospects.

The invention discloses biological polymer oil-proof paper and a preparation method thereof. The biological polymer oil-proof paper comprises a paper layer and a oil-proof layer, wherein an oil-proof agent on the oil-proof layer comprises sodium alginate, soybean protein isolate and glycerol; the oil-proof agent is prepared and the oil-proof agent is coated on the paper layer after being filtered and degassed in vacuum; and after drying and constant-temperature and constant-humidity treatment are carried out, the biological polymer oil-proof paper disclosed by the invention is obtained. The preparation method of the biological polymer oil-proof paper biological polymer oil-proof paper is simple and feasible, is low in cost, is environment-friendly, has no toxin to human bodies and has an excellent oil-proof effect.

The invention provides a preparation method of a magnetic KMS-1 / Fe3O4 composite material and application of the material for removing ciprofloxacin. The method comprises the steps that 1, L-cysteine serves as a coupling agent, and the KMS-1 / Fe3O4 composite material is prepared under a specific condition; 2, a ciprofloxacin target solution of which the concentration ranges from 10 mg / L to 250 mg / L is prepared, and the pH is adjusted to be 1-12; 3, a certain amount of the KMS-1 / Fe3O4 composite material is added to the ciprofloxacin target solution, and the mixture is put at room temperature for a reaction. According to the preparation method of the magnetic KMS-1 / Fe3O4 composite material and the application of the material for removing ciprofloxacin, the preparation method of the magnetic KMS-1 / Fe3O4 composite material is found for the first time, it is found that the composite material can rapidly and efficiently remove ciprofloxacin, and a good adsorptive property can be maintained on the reaction condition that the change of the pH value is large (pH=1-11). According to the preparation method of the magnetic KMS-1 / Fe3O4 composite material and the application of the material for removing ciprofloxacin, the processes are easy to operate, the technology is simple, and the requirement on equipment is low; the material can be widely used for removal of antibiotic pollutants in a water environment and has a wide market application prospect.

The invention provides a method for processing a soft soil foundation with an environment-friendly light pile. The method comprises the following steps: 1) preparing materials for the environment-friendly light pile; 2) preparing pile forming equipment for the environment-friendly light pile; 3) preparing a piling machine, and starting a vibration hammer for piling a guide hole pile pipe to a design depth; 4) upwardly pulling the guide hole pile pipe to guarantee that a movable bottom door pile tip is completely opened; 5) feeding a prepared environment-friendly light mixture to a feeding hole of the guide hole pile pipe for the first time; 6) starting an impact heavy hammer for continuously impacting the environment-friendly light mixture in the guide hole pile pipe for 2-6 times to form a dense expanded pile body; 7) feeding for the second time and tamping a pile top for 2-5 times by the impact heavy hammer; 8) continuously lifting the guide hole pile pipe until the distance from the bottom of the guide hole pile pipe to the ground is 30-50 cm, shifting the piling machine, filling up the pile top with soil and tamping or rolling the pile top; and 9) repeating the steps 3) to 8) until the reinforcement treatment of the soft soil foundation is finished. The method has the benefits as follows: the reinforcement effect is good, waste materials are turned into wealth, the cost is low, and the environment is protected.

The invention discloses a long-acting mildew-proof processing method for bamboos. The long-acting mildew-proof processing method comprises the following steps of uniformly mixing the oil and the SiO2@Ag nano-particles with the core-shell structure by adopting a physical ball milling method, and then adopting a vacuum impregnation method to enable the modified SiO2@Ag nano-particles to enter the bamboo material. The processing method is environment-friendly and easy to operate, the mildew-proof and antibacterial properties of the bamboo can and the wear resistance are improved, the defects thatthe nano-particles are poor in adhesive force on the surface of the bamboo wood, easy to lose and the like are effectively overcome, and meanwhile, the cost is low and the environment-friendly effectis achieved. By adopting the physical ball milling method, the problem of uniform and stable dispersion of the nano particles in oil can be effectively solved, compared with a nano-particle surface modification process, the long-acting mildew-proof processing method is easier to operate and is beneficial to industrial large-scale production.

The invention discloses a method for adsorbing heavy metals through a Fe3O4 / CD (cyclodextrin)-G-PANI (polyaniline) composite. The method comprises steps as follows: step one, a suspension of the Fe3O4 / CD-G-PANI composite and a NaNO3 solution are mixed in advance and pre-balanced for 24 h, and then, heavy metal ion wastewater is added; step two, a trace of a HNO3 or NaOH solution is dropwise added to the mixed solution; step three, the mixture is stirred mechanically for 24 h, so that the adsorption reaction is in a balanced state; step four, solid and liquid separation is performed; step five, solid parts are repeatedly leached until no Cu or Zn is detected in a leachate; step six, remaining Fe3O4 / CD-G-PANI colloids are collected and put in an oven, the next round of adsorption / desorption operation is performed after drying, and the process is performed eight times to realize repeated utilization. The method is low in cost, environment-friendly and high in repeated utilization rate and also has high purification efficiency for Cu-containing and Zn-containing urban sewage.

The invention relates to a piercing neutral protease type time and temperature indicator, which is consisted of a time / temperature indicator and a colourimetric card, the time / temperature indicator comprises a container comprising a chromogenic reagent, a substrate and enzyme; the chromogenic reagent is a Folin phenol reagent at a concentration of 2 mg / L; the substrate is a casein solution with mass fraction being 2%, which is composed of casein, 0.1 mol / L of a sodium hydroxide solution and distilled water; The enzyme is a neutral protease solution at the concentration of 2 mg / L. The inventionis a chromogenic system for an enzyme-substrate reaction designed according to a method for measuring protein concentration by Folin-phenol, irreversible color changes can be generated through time passing or temperature fluctuations, and a visible color change can be generated, which achieves the purpose of visually indicating the quality change of the frozen food after the time and temperaturechange.

The invention discloses a method for preparing a nano iron-based polyether sulfone (PES) organic-inorganic composite material. The method comprises the following steps: (1) pretreating a PES microfiltration membrane; (2) functionalizing the PES microfiltration membrane through methacrylic acid (MA); (3) respectively performing sodium ion exchange and iron ion exchange on the functionalized PES microfiltration membrane; (4) completely soaking the PES microfiltration membrane containing iron ions in an aqueous solution of green tea, so as to form the nano iron-based PES organic-inorganic composite material through the reducing action of the aqueous solution of the green tea. By utilizing the reducing action of the materials, wastewater containing antibiotics, bromate ions, bromo-organic matters and chloro-organic matters is respectively repaired under room temperature conditions. The method is low in process cost, and easy to operate and has the environment-friendly effects, the prepared organic-inorganic composite material is high in degradation capacity, high in stability and long in service cycle, and the composite material can effectively fix iron nanoparticles, is easy to recover and regenerate, belongs to an environment-friendly functional material and is suitable for industrial production.

The invention discloses a wind, light and heat energy storage complementary power generation system, and belongs to the technical field of electric power. The system comprises a wind generator, a photovoltaic cell panel, an alternating-current voltage stabilizing circuit, an inverter, a lead-carbon cell, a compensating circuit, a molten salt heating system, a solar collector group, a molten salt storage container and a conventional turbine generator. The system solves the technical problem that fluctuation of photovoltaic and wind power generation power needs to be compensated by stored heat energy. The system is the most suitable for complementary running with a light and heat solar collector heating molten salt heat storage type power plant, 24*7 stable power output can be realized aftera large-scale photovoltaic and wind power station uses molten salt exceeding 8 hours for heat storage, and a molten salt heat storage mode is low in cost and environmentally friendly as compared withan existing energy storage mode.

A municipal refuse leachate multi-stage treatment device comprises a closed water tank; a stirring pool is fixedly mounted on the top face of the water tank; a water inlet pipe is connected between the stirring pool and the water tank in a penetrating mode, a longitudinal shaft is rotatably mounted on one side of an inner cavity of the water tank, and coaxial circular plates are fixedly mounted on the front side and the rear side of the periphery of the longitudinal shaft respectively; the other side of the inner cavity of the water tank is provided with a turning plate; a hinge base is fixedly mounted on the side, away from the circular plates, of the bottom face of the turning plate, the front end and the rear end of a rotating shaft in the hinge base are fixedly connected with the corresponding inner walls of the water tank, vertical plates are fixedly mounted on the front side and the rear side of the turning plate, and an extrusion roller is arranged on the top face of the turning plate; and the front end and the rear end of the extrusion roller are respectively connected with the corresponding vertical plates through bearings. On one hand, a filter screen can be automatically cleaned, the automatic deslagging function is achieved, on the other hand, filtered floccules can be subjected to extrusion dehydration treatment, and the workload of subsequent floccule treatment is reduced.

The invention provides a novel fireproof coating for building materials and a preparation method thereof. The novel fireproof coating is prepared from the following components: high molecular resin, propylene carbonate, toluenediamine, tetrabromo bisphenol, waste sawdust, nano titanium dioxide, waste ceramics, didecyl dimethyl ammonium chloride, nano silicon carbide, absolute ethyl alcohol, metallic oxides, a lubricant, an additive, an emulsifier, an enhancer and deionized water. The fireproof coating prepared by the invention has the advantages of being low in cost and environmentally friendly, and is excellent in flame retardance, high in adhesive force, good in ductility, high-temperature-resistant and long in service life.

The invention relates to a reinforced transparent sound insulation acrylic plate, which comprises a transparent polymethyl methacrylate plate and plastic cellosilk uniformly embedded in the transparent polymethyl methacrylate plate, and a preparation method comprises the following steps: uniformly mixing a proper amount of methyl methacrylate and an initiator, heating until boiling, then stopping heating, keeping the temperature until a feed liquid reaches a certain viscosity, and then cooling to room temperature to form a pre-polymerized material; adding a release agent and an initiator into the pre-polymerized material, uniformly mixing, and carrying out vacuum defoaming for later use; arranging plastic fibers on a special mold with an acrylic plate, and sealing and fixing the two ends of each plastic fiber; performing mold filling on the pre-polymerized material in a special mold for the acrylic plate, wherein the polymerization time is 2-5 hours; after polymerization is completed, demolding, and the obtaining reinforced transparent sound insulation acrylic plate. The performance of the sound insulation acrylic plate is met, the problem that the base material is separated from the plastic fibers is solved on the premise that the plastic fibers do not need to be post-processed, and the preparation method is simple, low in cost and environmentally friendly.

The invention relates to an extruded papain time and temperature indicator, which is composed of a combined container containing a color developing reagent, a substrate and enzyme; the color developing reagent is a Folin phenol reagent liquid B, and the concentration is 2 mg / L; the substrate is a mixture of 20 g / L of a soy protein phosphate buffer solution, 0.1 mol / L of a sodium hydroxide solutionand distilled water; the enzyme is a papain solution having a concentration of 2 mg / L. A chromogenic system of an enzyme-substrate reaction designed according to the method for determining the protein concentration of Folin-phenol, irreversible color change can be carried out under the passage of time or temperature fluctuation, so that a visible color change is generated, and the purpose of indicating the time experienced by the chilled food or the change in quality after the temperature change is achieved.

The invention discloses a preparation method of benzimidazole complex 2 with high optical purity. The method comprises the following steps: forming benzimidazole complex 1 by using (L)-malic acid andbenzimidazole compound, obtaining the benzimidazole compound with higher (S) configuration rate after the desalting process, forming a crude product of the benzimidazole complex 2 by the benzimidazolecompound and (S)-2-hydroxy-2-phenylacetyl chloride, crystallizing the crude product of the benzimidazole complex 2 to obtain the benzimidazole complex 2 with high optical purity. The method is mild in reaction condition, the operation is simpler, the environmental pollution is small, and a product with high optical purity which meets the quality requirements of the current art can be obtained.

The invention belongs to the technical field of packaging, and particularly discloses a locking mechanism of a packaging box. The mechanism comprises a concave-shaped buckling groove formed in a side wall of a box body / a box cover and a corresponding convex-shaped locking buckle arranged in the side wall of the box cover / box body; the shape and the position of the concave-shaped buckling groove is matched with the shape and the position of the convex-shaped locking buckle; when the box cover is closed on the box body, the convex-shaped locking buckle can be embedded into the concave-shaped buckling groove to form an inverse buckle so that the box body cannot be opened. When the locking mechanism is used, an elastic material is utilized, after the box cover is closed, the convex-shaped lock buckle is bounced into the concave-shaped buckling groove to form the inverse hook, so that the box cover can be locked tightly without using glue and adhesive tape, so that the security of the goods in the box is protected. The locking mechanism has a simple structure; the sealing of the locking mechanism is adopted by utilizing a physical method of a built-in clamping buckle, so that the privacy of the products in the box can be fully ensured, and the packaging box is sealed without using any binding agent or adhesive tape, so that the cost is low and the environment is protected.

The invention belongs to the technical field of photoelectric detection, and particularly relates to a fin type photovoltaic silicon-based plasmon hot carrier infrared detection chip and a manufacturing method thereof. The infrared detection chip comprises an SOI substrate, a pixel array manufactured in top silicon of the SOI substrate, a signal reading circuit manufactured in bottom silicon of the SOI substrate and a through hole interconnection structure manufactured in a middle dielectric layer. Each single-image component comprises a metal electrode, a silicon nanowire array and a fin-typeconstruction metasurface integrated on a nanowire, so that perfect absorption of infrared radiation is achieved, absorbed photons are converted into surface plasmon hot carriers to be transferred into a semiconductor, photovoltaic signals are generated, and the detection function is achieved. The detection chip is manufactured by adopting a three-dimensional integration process, an infrared sensing unit and a signal processing unit are vertically stacked, vertical interconnection in the Z direction is realized between layers by utilizing a through hole filling technology, and the monolithic focal plane array detection chip with high density, low power consumption and ultra-large array scale is obtained.

The invention aims at solving the defect of being incendive in the existing acoustic board and discloses a flame retarding acoustic board, which comprises a board material body and plastic supporting structure that is inserted into the board material body; wherein, the board material body is prepared by a flame retarding polymer material which comprises the following components by weight percentage: 69.953 to 95.97 percent of methyl methacrylate monomer, 3 to 30 percent of fire retarding agents, 0.007 to 0.03 percent of evocating agents, 0.02 to 0.5 percent of ultraviolet radiation absorbent and 0.02 to 0.5 percent of hindered amine light stabilizer. The preparation method of the flame retardant acoustic board comprises the steps of preparing the flame retardant polymer material, surface treatment of the plastic supporting structure, mold preparation and casting molding process. The flame retardant acoustic board of the invention can not only meet the requirements of the acoustic board, but also have the function of being flame retardant; in addition, the preparation method of the invention not only has simple operation and is easy for industrial application, but also has low cost and environmental friendliness.

The invention discloses a preparation method of an NR / SBR / tread reclaimed rubber / rubber powder combined truck tire flap, and relates to a preparation method of a truck tire flap, in particular to a preparation method of a truck tire flap with a high performance and low cost. According to the method, natural engineering tire tread reclaimed rubber is used as a main body; NR, SBR and rubber powder (30-mesh tread rubber powder, 60-mesh tread rubber powder, 30-mesh common rubber powder and 60-mesh common rubber powder) are used as matrix rubber; the used vulcanization system is a sulfur vulcanization system, the used vulcanization accelerator is sulfenamide (CZ), the used anti-aging agent is an amine (RD and 4010NA) anti-aging agent, and the used reinforcing agent is N330. All the properties of the prepared rubber material can reach the national standards, and the cost is low.

The invention relates to a method for producing a semiconductor or conductor material from a two-dimensionally layered structured base material by means of electrolytic exfoliation in an electrolysiscell, comprising at least one electrode pair made of a first and second electrode, and an electrolyte solution containing at least one dissolved salt and / or sulphuric acid, wherein at least one of theelectrodes of the electrode pair contains the two-dimensionally layered structured base material, wherein the salt is chosen from tetraalkylammonium salts, and wherein, during the electrolysis, the polarity of the first and second electrode is reversed periodically, wherein the reversal of the polarity of the electrodes is carried out by applying an alternating current.

The invention relates to the field of high polymer material application, and provides a preparation method of polyurethane for coating film formation. The method comprises the following steps of 1, manufacturing epoxidized soybean oil into cyclic-carbonated soybean oil; 2, preparing an amino siloxane hydrolysate; 3, synthesizing nonisocyanate polyurethane. The polyurethane can replace isocyanate polyurethane as film forming materials of surface coatings of synthetic leather, spinning, furniture and the like, and the problem that the toxicity of adopted isocyanate is large in the existing polyurethane preparation process is solved.

The invention discloses a non-stick dressing. The non-stick dressing comprises a medical cotton base material and a hydrophilic anti-adhesion layer, the hydrophilic anti-adhesion layer is composed of a super-hydrophilic high polymer material, and the super-hydrophilic high polymer material comprises any one or more of polyvinylpyrrolidone, polyurethane, polyethylene glycol and polyvinylpyrrolidone. The non-stick dressing not only has hydrophilic and anti-adhesion effects, but also can improve the seepage absorption capacity of a medical cotton base material, reduce the adhesion of the dressing and the wound surface and relieve the dressing change pain of a patient, and meanwhile, no accidental substances are left on the wound and are easy to clean. The invention also discloses a preparation method of the non-stick dressing. The method comprises the following steps: firstly, dissolving the super-hydrophilic polymer material in a solvent to obtain a super-hydrophilic polymer solution; then drying the medical cotton base material, and soaking the medical cotton base material in the super-hydrophilic polymer solution; and after soaking is completed, squeezing to remove redundant liquid, airing or drying, and sterilizing to obtain the non-stick dressing. The method is simple to operate, low in cost, environmentally friendly and suitable for industrial production.