1267results about How to "Production environmental protection" patented technology

The invention relates to carbon paper and a preparation method thereof and particularly relates to special high-performance carbon paper for a gas diffusion layer of a fuel cell and a preparation method of the carbon paper. By taking short carbon fibers, plant fibers, heat bonding fibers and carbon black as raw materials, the carbon paper is prepared by the following steps: defibering, pulping and proportioning; then carrying out papermaking by adopting a wet-method papermaking process; and carrying out waterproof pigment coating treatment. The ratios of all the raw materials are as follows in parts by weight: 65-75 parts of the short carbon fibers, 10-15 parts of the plant fibers, 10-15 parts of the heat bonding fibers and 0-10 parts of the carbon black. According to the special high-performance carbon paper for the gas diffusion layer of the fuel cell and the preparation method of the carbon paper, a production process combining wet-method formation, hot pressing and coating is adopted and has the characteristics of simple process flow, easiness for controlling product quality, environment-friendly production process and the like; the material ratio of each raw material can be accurately controlled in the production so as to be good for controlling the product quality.

The invention discloses a room-temperature self-crosslinking water-soluble polyurethane acrylic resin and a preparation method and an application thereof. The preparation method adopts an in-situ emulsion polymerization method and improves the prior preparation method, introduces tetramethyl benzene dimethylene diisocyanate or 2, 4 methyl cyclohexyl diisocyanate, and dipropylene glycol or neopentyl glycol functioning as chain extendor in raw materials, thereby lowering the viscosity of polyurethane prepolymer, and achieving the purpose of performing the synthetic reaction without organic solvent; oil-soluble evocating agent and water-soluble evocating agent are adopted to together evocate radical copolymerization so that oil-soluble monomer and water-soluble monomer can more effectively perform the radical copolymerization, thereby improving the reaction conversion rate. In addition, the combination of the two evocating agents also leads emulsion in the reaction to keep stable without easily jellifying and layering. The resin can be used for preparing plastics, aluminum foil package compound gel, paper-plastics compound gel, water color ink, water oil polish, water wooden ware paint or water plastic paint.

The invention relates to a silicon-based negative electrode material, a preparation method thereof and an application of the silicon-based negative electrode material in a lithium-ion battery. The silicon-based negative electrode material comprises a silicon-based active material and a composite layer, wherein the composite layer coats the surface of the silicon-based active material and is formedby a flexible polymer, flake graphite and a conductive material; and the method comprises the steps of (1) dissolving the flexible polymer into a solvent; (2) adding the flake graphite and the conductive material into a flexible polymer solution obtained in the step (1) under the stirring condition; (3) adding an anti-solvent to a mixed coating solution obtained in the step (2) and stirring; (4)adding the silicon-based active material to the supersaturated mixed coating solution obtained in step (3) under the stirring condition, stirring and separating; and (5) carrying out thermal treatmentto obtain the silicon-based negative electrode material. The silicon-based negative electrode material is simple in preparation method and low in cost, and industrial production is easy to implement;the prepared silicon-based negative electrode material has excellent electrochemical cycle performance and swelling inhibition performance, and the service life of the lithium-ion battery can be prolonged.

The invention relates to a thermoplastic polyurethane foaming particle and a preparation method thereof. The thermoplastic polyurethane foaming particle comprises the following components in percentage by mass: (A) 65-90% of a thermoplastic polyurethane elastomer; (B) 2-30% of a thermoplastic resin polymer; and (C) 0-15% of a compatilizer. The preparation method comprises the following steps: adding blending alloy particles of the thermoplastic polyurethane elastomer, the thermoplastic resin polymer and the compatilizer into an autoclave, adding carbon dioxide into the autoclave, enabling carbon dioxide in the autoclave to be in a supercritical state, relieving pressure of the autoclave so as to obtain non-foaming particles containing carbon dioxide; heating and foaming the non-foaming particles containing carbon dioxide in hot air, thereby obtaining the foaming particles. The thermoplastic polyurethane foaming particle prepared by the method is stable in dimension, basically non-shrinkable, bright and full in surface, uniform in foam diameter, controllable in foam size of 10-100 microns and excellent in resilience.

The invention discloses an aqueous solar energy heat-absorbing coating. The uniformly mixed aqueous solar energy heat-absorbing coating is prepared by carrying out defibrination on an organosilicone-modifed acrylic emulsion (silicone-acrylic emulsion), sulfonated graphene, Co-Al2O3 nano-composite powder, yttria-stabilized zirconia powder, SiC powder, superfine iron powder, superfine nickel powder, flake graphite powder, silica sol, deionized water, a flatting agent and a wetting agent in a sand grinding machine at the room temperature in a certain proportion. The aqueous solar energy heat-absorbing coating has the properties that the absorptivity is 0.90-0.94, the emissivity is 0.18-0.20, the coating adhesive force is 4B-5B level, the pencil hardness is H, and the stability and the environmental protection property are high; the aqueous solar energy heat-absorbing coating is simple in preparation process, low in cost, suitable for industrial production and especially applicable to solar energy heat-absorbing coatings of a solar heat absorber.

The invention relates to an extruded and foamed thermoplastic polyurethane elastomer particle and a preparation method thereof. The particle contains the following components in percentage by mass: (A) 65%-90% of a thermoplastic polyurethane elastomer, (B) 2%-30% of a thermoplastic resin polymer, (C) 0.5%-15% of a compatilizer and (D) 0.1%-5% of a foaming nucleating agent. The preparation method of a TPU formed particle comprises the following steps: uniformly mixing the thermoplastic polyurethane elastomer, the thermoplastic resin polymer, the compatilizer and the foaming nucleating agent, putting the mixture into melt extrusion equipment, and carrying out granulation, so as to obtain a blending alloy particle; and putting the blending alloy particle into foaming extrusion equipment, carrying out melting plastification so as to obtain a melt, dissolving supercritical carbon dioxide into the melt, foaming by virtue of a mouth mold, and carrying out underwater dicing, so as to obtain the formed particle. The prepared thermoplastic polyurethane foamed particle is stable in size and basically does not shrink, the surface is bright and plumy, and the diameters of foamed holes are uniform.

The invention relates to the field of papermaking, aims at solving the problems that in the preparation process of the existing cation dispersing rosin latex, a solvent does not have a complete environment-friendly effect and is troublesome in recovery; after the solvent is removed, instability is possibly brought to an emulsifying agent and dispersed rosin, so that a rosin sizing agent is poor in mechanical stability, and the rosin sizing efficiency is not ell improved. The invention provides a novel cationic rosin sizing agent and application of the novel cationic rosin sizing agent in papermaking additive. The novel cationic rosin sizing agent comprises the following components by weight percent: 3-15% of a composite type emulsifying agent, 15-40% of modified rosin resin and 5-30% of an emulsion stabilizer; water is added into the components, so that the total solid content is 30-80%. When the sizing agent is used, emulsion particles are stable in performance, the sizing effect is remarkable, and the environment-friendly production is achieved.

The invention belongs to the field of metallurgy and particularly relates to a vanalium preparation method. The vanalium preparation method provided by the invention is low in cost and ensures high purity of obtained alloy. The technical scheme provided by the invention is as follows: in the vanalium preparation method, vanadium pentoxide and metallic aluminium are used as raw materials and are subjected to ignition reduction in a reaction device to obtain vanalium and furnace clinker; and a continuous feeding manner is adopted for the reaction device during feeding, and the feeding speed is 5-40kg/min. Compared with the prior art, the vanalium preparation method provided by the invention has the advantages that no coolant is added for controlling heat so that the cost is lower and the requirement for mass industrial production is completely met; and the produced vanalium is low in impurity content, the finished vanalium contains 65-91wt% of V, 9-35wt% of Al, not more than 0.3wt% of Fe and not more than 0.3wt% of Si, and the obtained vanalium has higher purity and meets the requirement of subsequent further processing.

The invention discloses a moisturizing eye mask prepared from bacterial cellulose. The method for preparing a moisturizing eye mask from bacterial cellulose comprises: inoculating 1-2 rings of activated inclined seed Gluconacetobacter xylinum into a medium, and conducting oscillating culture to obtain a seed solution; then inoculating the seed solution into the medium, fully oscillating the bacterial solution obtained by mixing the seed solution and the medium to make them mixed uniformly, then conducting stationary culture, thus generating a bacterial cellulose membrane floating on the solution surface, flushing the generated bacterial cellulose membrane with water to remove the medium and impurities on the membrane surface, then immersing the membrane in an alkali solution to remove thalli and residual medium from the membrane, and finally flushing the membrane with distilled water till the pH value of the membrane is measured up to 7-7.2, thus obtaining a bacterial cellulose wet membrane, which is then cut into an eye mask. The eye mask has the advantages of good moisturizing property and biological tissue compatibility, no toxicity, harmlessness, and simple material processing technology.

The invention discloses a method for printing and decorating lacquerware surfaces with ultraviolet curing printing ink (UV ink), which comprises the following processing steps of 1) selecting base material of the lacquerware; 2) drafting a digital picture; 3) printing; 4) painting the surface; 5) processing to obtain finished-product in a later period such as adding frame and base. The method of the invention has the advantages that the method has higher efficiency and lower cost in comparison with traditional painting technique and can also achieve exquisite art effect at the same time. The use of UV ink offers brighter color and wider color gamut and particularly provides excellent effect for the surface of special lacquerware. The picture surface of the finished product that is printed and decorated by UV ink on the lacquerware surface has the advantages of scratch resistance, corrosion resistance and good weather fastness; moreover, the UV ink can be cured in a very short period of time and the production process is featured in environmental friendliness. During the whole production process, the invention greatly reduces the time of manual color drawing and engraving in the process of making lacquerware; and the invention also reduces cost, improves the production efficiency and increases the yield. As a result, the manufacturing of traditional lacquerware handmade crafts can realize mass production with the help of modern technology.

The invention relates to a spunlaced non-woven material with the one-way water guide function and a preparing method and application thereof. The spunlaced non-woven material is formed by respectively carding hydrophilic fiber and hydrophobic fiber into webs, then compositing the webs, and reinforcing the webs in a spunlaced mode. According to the preparing method, the hydrophilic fiber and the hydrophobic fiber are respectively carded to obtain the hydrophilic fiber web and the hydrophobic fiber web, the hydrophilic fiber web and the hydrophobic fiber web are laid and recombined to obtain a composite fiber web, and the composite fiber web is reinforced in the spunlaced mode, stand and is dried to obtain the spunlaced non-woven material. The spunlaced non-woven material is applied to medical protecting clothes, wound accessories and diaper coating layers, the method is wide in range of processed fiber, existing production equipment can be directly used, and the production process protects the environment and is free of pollution.

The invention relates to a preparation method of waterborne non-isocyanate polyurethane modified polyester and provides a preparation method of the waterborne non-isocyanate polyurethane modified polyester. The preparation method comprises the following steps: (1) preparation of unsaturated prepolymer containing a urethane bond; (2) preparation of polyester containing an unsaturated double bond; (3) graft polymerization of the prepared polyester containing the unsaturated double bond, and the prepolymer; and (4) dispersion of a graft polymer. The invention also provides an application of the prepared waterborne non-isocyanate polyurethane modified polyester in vehicle coatings.

The present invention relates to an (R)-praziquantel preparation method, comprising steps of using (R,S)-tetrahydroisoquinoline-1-formate or salts thereof, or 1-(S)-tetrahydroisoquinoline-1-formate or salts thereof as a raw material to prepare 1-(R)-tetrahydroisoquinoline-1-formate salts, and steps of preparing (R)-praziquantel from said 1-(R)-tetrahydroisoquinoline-1-formate salts. The preparation method for 1-(R)-tetrahydroisoquinoline-1-formate or salts thereof is as follows: perform an oxidation reaction between the raw material described above and oxygen in the presence of recombinant D-amino acid oxidase and catalase, then perform a reduction reaction on the resulting product under the effect of a borane-amine complex, thus successively converting 1-(S)-tetrahydroisoquinoline-1-formate or salts thereof into the 1-(R)-tetrahydroisoquinoline-1-formate or salts thereof isomer. The present method not only produces an (R)-praziquantel product with a high optical purity, but is also low-cost and environmentally friendly in terms of production.

The invention relates to a preparation method of a low-toxic environment-friendly type novel precious metal beneficiation agent. Raw materials of the low-toxic environment-friendly type novel precious metal beneficiation agent comprise a cyanate, sodium hydroxide, sodium sulfate, sodium ferrocyanide, a bromide, and a lead salt. The preparation method comprises following steps: sodium cyanate, sodium hydroxide, sodium sulfate, and sodium ferrocyanide are mixed at a certain ratio; an obtained mixture is delivered into a smelting pot which is heated to be slightly red, and is heated to 650 to 750 DEG C so as to obtain a fused material, temperature is maintained to be 750 DEG C for 30 to 50min of reaction, and then an obtained product is collected and cooled; the obtained product is smashed, the bromide and the lead salt are added for stirring, and the environment-friendly type precious metal beneficiation agent is obtained via combination. The environment-friendly type precious metal beneficiation agent can be widely used for precious metal beneficiation metallurgy of nonferrous metals ores, contains no hypertoxic compounds, is safe for human and animal, and is friendly to the environment. Compared with other metal beneficiation agents, the environment-friendly type precious metal beneficiation agent is excellent in effects, stable in performance, and low in production cost; the preparation method is simple; and environmental protection can be realized.

The invention provides a thermoplastic polyurethane elastomer foamed bead and a preparation method thereof. The thermoplastic polyurethane elastomer foamed bead is mainly prepared from the following raw materials in parts by weight: 60-94 parts of thermoplastic polyurethane elastomer, 2-20 parts of foaming agent, 0.5-3 parts of crosslinking agent, 0.5-5 parts of nucleator, 2-10 parts of filler and 1-2 parts of light stabilizer. The thermoplastic polyurethane elastomer foamed bead has the advantages of uniform particle size, high closed-cell rate, uniform pores and high strength. The preparation method is simple, has the advantages of fewer production steps, low required equipment investment, safe and environment-friendly production process and controllable foaming density, and is suitable for all thermoplastic polyurethane elastomers.