35results about How to "Achieve chemical modification" patented technology

The invention is a chemical synthesis method for synthesizing poly-3-hydroxybutyrate by using the technology of beta-butyrolactone and lactide copolymer. The specific method is: preparing reactants; 1-100 parts by weight of β-butyrolactone and 1-100 parts by weight of lactide; coordination polymerization catalyst or anion polymerization catalyst with a total weight of 0.01-1%; Dry in the reaction container for 0-48 hours; put the reactant into the reaction container and seal the reaction container, and react for 24-720 hours under stirring at 40-150°C to obtain a colorless transparent solid product; dissolve the product in an organic solvent , and then added dropwise to the excess precipitant, the precipitate is poly-3-hydroxybutyrate. Utilizing the preparation method of the β-butyrolactone and L-lactide copolymer of the present invention, the number-average relative molecular mass of the β'-butyrolactone and L-lactide copolymer can reach 1000-40000, and the relative molecular mass The mass distribution is narrow.

The invention belongs to the technical field of waste material utilization and lithium ion battery material preparation, and specifically discloses a method for preparing a thin-layer graphene negative electrode active material by using antibiotic slag. The aqueous solution containing antibiotic slag and alkali is hydrothermally liquefied, and then solidified. liquid separation to obtain a bacterial residue solution; adding a transition metal source to the bacterial residue solution, mixing the liquid phases, performing dehydration treatment, and then performing heat treatment; the heat treatment includes the first stage of pretreatment and the second stage of heat treatment in sequence; The temperature of the first stage of heat treatment is 400-600°C; the temperature of the second stage of heat treatment is 700-900°C; and the heating rate of the heat treatment process is 2-10°C / min; the product obtained by heat treatment is washed and dried, That is, the thin-walled graphene is obtained. The invention realizes the high-efficiency utilization of the waste materials, and co-produces the graphene negative electrode material with high thin wall and high electrochemical performance.

The invention relates to a preparation method of a green light-cured durable one-way moisture-diversion finishing agent. The preparation method comprises the following steps of 1, adding 3 to 20wt% of sodium or potash water glass into a mixture of water and ethanol, adding greater than or equal to 4wt% of an ammonium salt aqueous solution into the mixed solution, adjusting a pH value, and carrying out stirring at a room temperature, 2, orderly adding 0.5 to 1wt% of gamma-azidopropyltriethoxysilane and 2 to 4wt% of a hydrophobic long-carbon chain alkyl siloxane into the mixed solution obtained by the step 1 with stirring, and sequentially carrying out stirring to obtain a modified nano-SiO2-hydrophobic long-carbon chain alkyl silanol cohydrolyzed solution, and 3, sequentially adding 0.5 to 15wt% of a thickener into the modified nano-SiO2-hydrophobic long-carbon chain alkyl silanol cohydrolyzed solution, and carrying out stirring to obtain the green light-cured durable one-way moisture-diversion finishing agent. The preparation method adopts the raw materials having wide sources and has a low cost. The green light-cured durable one-way moisture-diversion finishing agent has stable properties. A fabric treated by the green light-cured durable one-way moisture-diversion finishing agent has excellent one-way moisture-diversion performance and washing endurance and has wide market application prospects and good social benefits.

The invention discloses a modified phosphogypsum capable of avoiding environmental pollution caused by phosphogypsum produced in the phosphoric acid or phosphate fertilizer industry, and capable of using the phosphogypsum for roadbed materials, turning waste into treasure and a preparation method thereof. The modified phosphogypsum, including 84% to 94% CaSO 4 and 5% to 15% CaCO 3 . The preparation method of the modified phosphogypsum comprises steps, S1, dehydrating the phosphogypsum, the dehydration temperature is 150°C to 200°C; S2, stirring and breaking the phosphogypsum into powder; S3, air cooling the dehydrated phosphogypsum to room temperature ; then add CaCO to the phosphogypsum 3 , and makes CaCO 3 The mass percentage content is 3%; stirring makes phosphogypsum and CaCO 3 Mix well; S4, then to the mixed phosphogypsum and CaCO 3 CaCO 3 ; and make CaCO 3 The mass percentage content is 5% to 15%; stir and mix evenly. The modified phosphogypsum prepared by the modified phosphogypsum preparation method is used as a roadbed material, which can save land and avoid environmental pollution.

The invention relates to a preparation method for low-carbon photocuring single-side moisture transport finishing agent. The method comprises the following steps: (1) a precursor is poured in a mixture of ethanol and de-ionized water, and is acutely stirred at the temperature of 10-40 DEG C; and (2) catalyst-ammonia water is slowly dripped to stir, then different-chain-length alkyl containing an azide group or siloxane of aromatic hydrocarbon is added to continuously stir in order to obtain low-carbon and energy-conservation single-side moisture transport finishing agent containing an azide functional group. The finishing agent has stable properties; finished fabrics obtain excellent single-side moisture transporting performance and durability, and need no heat baking, so that a large amount of energy is saved; the finishing agent accords with the national modern economic development theme of environmental protection and low energy consumption, and has wide market application prospect and excellent social benefit.

The invention discloses polyurethane / polyvinyl acetate hybrid emulsion. The polyurethane / polyvinyl acetate hybrid emulsion is prepared from water, vinyl acetate, dihydric alcohol containing a hydrophilic group, macromolecular dihydric alcohol, polyether trihydric alcohol, isocyanate, a monohydroxy-containing unsaturated monomer, a chain extender, a metal catalyst T-12, protective colloid, a cross-linking monomer, a copolymerization monomer, an oxidant and a reducing agent; the parts by mass of the components are as follows respectively: 300 to 450 parts of the water, 180 to 320 parts of the vinyl acetate, 1 to 8 parts of the dihydric alcohol containing the hydrophilic group, 40 to 90 parts of the macromolecular dihydric alcohol, 5 to 30 parts of the polyether trihydric alcohol, 10 to 30 parts of the isocyanate, 1.0 to 5.0 parts of the monohydroxy-containing unsaturated monomer, 0.5 to 1.7 parts of the chain extender, 0.1 part of the metal catalyst T-12, 10 to 40 parts of the protective colloid, 10 to 40 parts of the cross-linking monomer, 50 to 100 parts of the copolymerization monomer, 1.1 to 10.5 parts of the oxidant and 1.5 to 5.5 parts of the reducing agent. The polyurethane / polyvinyl acetate hybrid emulsion disclosed by the invention has high stability, good water-resisting performance and good low temperature resisting performance.

The invention relates to the technical field of preparation of a sulfur-fixing agent, in particular to a flue gas-sulfur-fixing agent used in a sodium sulfide synthesis process and a preparation process thereof; it is composed of the following raw materials by weight: 80-90 parts of modified calcium carbonate powder, 10 parts of ~13 parts vermiculite powder, 3.6~4.5 parts sodium carbonate, 7~12 parts graphene, 3~5 parts potassium nitrate, 3.5~4.3 parts cerium stearate, 8~12 parts liquid paraffin, 4~6 parts permanganic acid Potassium, 3-5 parts of sodium lauryl sulfate, 12-15 parts of activator, 6-10 parts of stabilizer, 2.2-3.2 parts of auxiliary agent and appropriate amount of deionized water; the sulfur-fixing agent prepared by the present invention can ensure the sulfur-containing gas It can chemically react with the active ingredients in the sulfur-fixing agent in time; thus achieving the purpose of high-efficiency sulfur-fixing, greatly reducing the emission of sulfur oxides and reducing the emission of sulfur-containing gases; while reducing the pressure of environmental protection, it also makes the The life of equipment and facilities is effectively extended.

The invention belongs to the technical field of bacterial residue solid waste treatment and battery materials, and specifically relates to a method for preparing a thin-layer graphene / transition metal fluoride composite positive electrode active material by using antibiotic bacterial residue. Performing hydrothermal liquefaction with an aqueous alkali solution, followed by solid-liquid separation to obtain a bacterial residue solution; adding a transition metal M source to the bacterial residue solution, mixing the liquid phases, performing dehydration treatment, and then performing heat treatment; the heat treatment includes sequentially performing The first stage of pretreatment and the second stage of heat treatment; the product obtained by the heat treatment and the fluorine source are subjected to fluorination and annealing treatment to obtain the thin-layer graphene / M metal fluoride composite positive electrode active material. The invention also provides the material prepared by the preparation method and its application in lithium batteries. The technical scheme described in the present invention can realize the double synergy of chemical and physical structures, which helps to significantly improve the electrochemical performance of materials.