143results about How to "The preparation process is safe and environmentally friendly" patented technology

The invention discloses a preparation method of a polyester type pure solid polycarboxylic acid high-performance water reducing agent, belonging to the field of water reducing agents. According to the invention, by taking a (methyl) acrylic acid monomer and a polyethylene glycol compound as reactants, a polymerizable macromonomer is prepared through esterification reaction under the effect of a catalyst, and the polymerizable macromonomer conducts a free radical bulk polymerization reaction with an unsaturated carboxylic acid monomer and a chain transfer agent under the effect of an initiator in an environment without any solvent to obtain the polyester type pure solid polycarboxylic acid high-performance water reducing agent. The method disclosed by the invention has strong process controllability, high degree of polymerization and low cost and prevents environmental pollution; a completely anhydrous polyester type pure solid polycarboxylic acid high-performance water reducing agent is prepared through esterification reaction and bulk polymerization, which has neat cement paste liquidity and holding ability, cement adaptability and concrete application performance similar to a traditional solution method; meanwhile, since the polymer product is an anhydrous pure solid, a solution with any concentration can be prepared according to actual needs; and without the after-treatment processes such as heating and drying, solvent separation and the like, the transportation is more convenient, and good market competitiveness and application prospects are realized.

The invention provides a polylactic acid foam material, which is obtained by foaming of a mixture. The mixture comprises by weight 100 parts of polylactic acid, 0.5-15 parts of water, 1-90 parts of a carrier, 0-20 parts of a plasticizer, 0-15 parts of a nucleating agent, 0-3 parts of an anti-hydrolysis agent and 0-5 parts of a chain extender. The polylactic acid foam material in the application uses water as a foaming agent rather than an organic foaming agent, so that the foaming of polylactic acid is safe and environment-friendly. The application uses polylactic acid as a matrix for the foam material to endow the foam material with good biodegradability, thus realizing biodegradation of the polylactic acid foam material. The application also provides a reparation method of the polylactic acid foam material.

The invention discloses a high-thermal-conductivity polymer composite material and a preparation method and application thereof. The high-thermal-conductivity polymer composite material comprises a polymer base body and three-dimensional boron nitride arranged in the polymer base body in a filling mode. The volume fraction of the three-dimensional boron nitride in the high-thermal-conductivity polymer composite material is 5-50%. According to the high-thermal-conductivity polymer composite material, the three-dimensional boron nitride is adopted to build a three-dimensional network structure in the polymer base body. A heat conductive channel is built in the polymer base body. Thus, the high-thermal-conductivity polymer composite material has a high heat conductive coefficient, the condition of the preparation method of the material is moderate and easy to control, the technology is simple, and the method is safe and environmentally friendly.

The invention relates to a solvent-free method for preparing a polyether modified polysiloxane antifoaming agent. The solvent-free method is characterized by comprising the following steps: 1, adding siloxane-oxyalkylene copolymer which is spirally evaporated to remove water to a reaction kettle, then filling nitrogen, and adding an antioxidant BHT (Butylated Hydroxytoluene); 2, adding a platinum catalyst to the reaction kettle, and heating the reaction kettle and stirring, wherein the provided temperature for heating is at 50 to 60 DEG C; 3, adding low-hydro silicone oil and a 4A molecular sieve to the reaction kettle for starting hydrosilylation reaction, and controlling the temperature in the reaction kettle to reach 70 to 110 DEG C, then stirring at constant temperature for 1 to 2 hours; 4, adding hydrochloric acid or sulfuric acid to the reaction system, then stirring to neutralize, and reacting for 1 to 1.5 hours at 85 to 95 DEG C; and 5, spirally evaporating to obtain the reacting product which is the polyether modified polysiloxane after the reaction. The solvent-free method is high in chemical conversion rate; and the prepared polyether modified polysiloxane antifoaming agent is transparent and high in purity, so that the antifoaming performance of the polyether modified polysiloxane antifoaming agent is high.

The invention relates to a carbon/aluminum composite cathode foil for a solid aluminum electrolytic capacitor and a preparation method thereof. The technical scheme is as follows: carrying out proportioning according to that the weight ratio of conductive carbon black: dispersant: organic binder: solvent is 1: (0.0001-0.05): (0.01-1): (10-1000), firstly mixing the conductive carbon black, the dispersant and the organic binder, further adding the solvent, uniformly stirring and mixing, and preparing into slurry; uniformly coating the prepared slurry on the surface of an aluminum foil after pretreatment, then placing the aluminum foil coated with the slurry into a vacuum furnace, keeping the temperature for 1-40h under the conditions that the vacuum degree is 10-4-10-1Pa and the temperature is 300-660 DEG C, naturally cooling to room temperature in the vacuum furnace, and directly preparing the carbon/aluminum composite foil for the solid aluminum electrolytic capacitor or preparing the carbon/aluminum composite foil for the solid aluminum electrolytic capacitor after activation treatment. The process is simple and the preparation process is safe and environment-friendly; and the prepared product has the characteristics of high specific capacitance, good stability, high carbon/aluminum interfacial binding force and long service life.

The invention discloses an antibacterial composite nanofiber membrane as well as a preparation method and an application thereof. The antibacterial composite nanofiber membrane comprises a nanofiber membrane and g-C3N4 nanosheets distributed on the surface and inside of nanofiber membrane. The invention also discloses the preparation method of the antibacterial composite nanofiber membrane and theapplication of the antibacterial composite nanofiber membrane. Compared with the prior art, the nanofiber membrane with antibacterial and filtering functions can be prepared only from a graphite phase carbon nitride particle material with a plasma technology, and the nanofiber membrane with an antibacterial function and a filtering function can be prepared, and has low resistance and high efficiency. Meanwhile, the preparation process of the antibacterial composite nanofiber membrane is safe and environmentally friendly, and the preparation method is simple and feasible.

The invention relates to a nitrogen-doped carbon-coated vanadium nitride electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing a vanadium pentoxide nanowire precursor from vanadium pentoxide as a main raw material; by taking a pyrrole monomer as a main raw material, coating the surface of the vanadium pentoxide nanowire precursor with polypyrrole; finally performing calcining, thereby obtaining the electrode material. The preparation method is simple, high in repeatability and relatively low in equipment and chemical requirement; the prepared electrode material can be not only applied to a lithium-sulfur battery anode material, but also used as a lithium ion battery cathode material, can be compounded with graphene and is excellent in electrochemical property.

The invention relates to an electrothermal film, and provides a graphene-based waterproof electrothermal film and a preparation method thereof. According to the invention, the problem that the electrothermal film preparation process is not safe and not environmentally-friendly in the prior art is solved. The method comprises the following preparation steps: (1) dispersing graphene into water and mixing with resin emulsion and aids to obtain graphene-based waterborne electrothermal pulp; (2) dipping non-woven fabric into the graphene-based waterborne electrothermal pulp and drying to prepare electrothermal non-woven fabric; (3) adhering conductive copper foils to the two ends of the electrothermal non-woven fabric; (4) covering the upper surface and the lower surface of the electrothermal non-woven fabric, adhered with the conductive copper foils, with polyester plastic films, and hot-sandwiching the electrothermal non-woven fabric in the middle of the polyester plastic films.

The invention discloses an MXene/silver nanowire/nanocellulose composite film and a preparation method thereof. The method mainly comprises the following steps: (1) etching MAX to prepare a single-layer MXene colloidal solution; (2) preparing a silver nanowire colloidal solution; (3) preparing a carboxylated nanocellulose colloidal solution by a TEMPO oxidation method; (4) mixing the three colloidal solutions according to a certain mass ratio, conducting stirring and carrying out ice-bath ultrasonic treatment to obtain a uniform mixed solution; and (5) carrying out vacuum suction filtration on the mixed solution, and carrying out hot-pressing drying to obtain the MXene/silver nanowire/nanocellulose composite film. According to the preparation method of the MXene/silver nanowire/nanocellulose composite film, the prepared composite film has good flexibility, electrochemical performance, electromagnetic shielding performance and antibacterial performance, and has wide application prospects in the fields of aerospace, weaponry, flexible wearable equipment and the like.

The invention discloses a nano cellulose/MXene/silver nanowire sandwich structure composite film and a preparation method thereof. The method mainly comprises the following steps of: (1) preparing a nanocellulose colloidal solution by a TEMPO oxidation method; (2) preparing a single-layer MXene colloidal solution by an MILD method; (3) preparing a silver nanowire colloidal solution by a polyol reduction method; (4) mixing the MXene colloidal solution and the silver nanowire colloidal solution according to a certain mass ratio to obtain a uniform mixed solution; and (5) carrying out alternative suction filtration on the mixed solution and the nanocellulose colloidal solution, and carrying out hot-pressing drying to obtain the nanocellulose/MXene/silver nanowire sandwich structure composite film. According to the nanocellulose/MXene/silver nanowire sandwich structure composite film and the preparation method thereof, the prepared film has good conductivity, broadband high electromagnetic shielding effectiveness and good mechanical performance and antibacterial performance, the preparation method is simple and easy to implement, the preparation process is safe and environmentally friendly, and batch production is facilitated.

The invention relates to a preparation method for synthesizing a high-performance polycarboxylic acid water reducing agent by undergoing a one-step amidation reaction, belonging to the field of water reducing agents. In the invention, a high-performance polycarboxylic acid water reducing agent material is prepared by directly reacting with a one-step amidation method, i.e., the water reducing agent is obtained by undergoing an amidation reaction on reactants which are respectively polymethacrylic acid and methoxyl polyethenoxy ether containing amino at the other end under the action of a catalyst. The method has the advantages of conveniently-controlled process, easiness, practicability, low cost and environmental friendliness. An amide structure and a polyethenoxy ether structure are introduced into the molecular structure of the polycarboxylic acid water reducing agent by undergoing a one-step amidation reaction, so that high flow property of cement is realized, the flow property keeping ability and the cement adaptability are remarkably enhanced, and high flowability can be achieved under the conditions of low cement water factor and low mix proportion.

The invention discloses a preparation method of a polycarboxylic acid water reducer for finish concrete. The preparation method comprises the following steps: (1) allowing diethylenetriamine and maleic anhydride to react under the action of a catalyst to prepare a bright red viscous pre-polymer solution; and (2) copolymerizing the pre-polymer solution, unsaturated polyoxyethylene ether, a sulfoacid monomer and unsaturated carboxylic acid under the action of a redox initiation system and a chain transfer agent to prepare a polycarboxylic acid type water reducer for finish concrete. The water reducer and one or more of a defoaming agent, an air entraining agent, a retarder and a viscosity adjusting agent are compounded and then doped into concrete to prepare finish concrete which is high in construction performance, excellent in wrapping property and can be used for realizing the mirror effect.

The invention relates to a method for preparing mesoporous silicon dioxide, the method is characterized in that mercapto-vinyl can be used for a free radical addition reaction, organo-silicone containing a mercapto group and polybutadiene block of triblock copolymer of styrene-butadiene-styrene are reacted, an organo-siloxane modified styrene-butadiene-styrene triblock copolymer can be obtained, then the organo-siloxane modified styrene-butadiene-styrene triblock copolymer is carried out a sol-gel reaction with a silicon source under the acidic or alkaline condition to form gel, the mesoporous silicon dioxide is obtained after cracking the gel. Compared with the prior art, the mesoporous silicon dioxide material has the average pore diameter of 5-18nm, the pore volume of 0.24-0.30 cm<3>/g, the specific surface area of 418-480 cm<2>/g, and has the advantages of cheap raw material and easy raw material acquisition, mild reaction condition, simple and high efficient preparation process, safety and environmental protection, and is convenient for large scale production.

The invention relates to injectable hydrogel. The injectable hydrogel contains a chained or crosslinked polylysine unit and a chained or crosslinked modified polysaccharide unit, is non-toxic, has ideal crosslinking strength and mechanical properties as well as better fluidity and natural bacteriostatic and antiseptic properties, and can be widely applied in the aspects of medical hemostatic materials, medical dressings and treatment of xerophthalmia with punctual plugs; the invention also relates to a preparation method of the injectable hydrogel. According to the method, polylysine and modified polysaccharides are used as crosslinking substrates, and organic chemical reagents are seldom used, so that the preparation process is safe and environmentally-friendly.

The invention discloses a conductive micro-nanometer fiber stranded wire based on solvent-free electrospinning and a preparing method thereof. The conductive micro-nanometer fiber stranded wire comprises a photocuring material template stranded wire and a conductive macromolecule layer. The photocuring material template stranded wire is formed by winding micro-nanometer fiber cured by solvent-free electrospinning ultraviolet light. The conductive macromolecule layer is manufactured through an in-situ polymerization method and comprises conductive macromolecule layer bodies permeating into the template stranded wire and wrapping the template stranded wire. According to the conductive micro-nanometer fiber stranded wire, conductivity of the fiber stranded wire is further improved while excellent stretchability is kept, organic solvent does not need to be added in the electrostatic spun yarn preparing process, the preparing process is safer and more environmentally friendly, and the stranded wire is suitable for large-scale production.

The invention relates to a composite diesel energy-saving detergent and a preparation method thereof; the preparation method comprises; first, saponifying, in a reactor, an organic acid into a transparent homogeneous liquid via sodium hydroxide solution; second, reacting with rare-earth saline solution, allowing separation, collecting supernate, and refining to obtain organic acid rare earth; third, adding a dispersant, nitrate, an antioxidant and Mannich base to the organic acid rare earth, and mixing well to obtain the product, the composite diesel energy-saving detergent. The composite diesel energy-saving detergent has a high content of effective ingredients and has good diesel solubility and deterging dispersibility, the preparation method is environmentally friendly and safe, and the composite diesel energy-saving detergent and the preparation method thereof have significant market advantages.

The invention discloses a ferrum-based powder metallurgy antifriction material and a preparation method thereof. The material is prepared from the following raw materials in part by weight: 72 to 75 parts of mixed iron powder, 5 to 8 parts of barium oxide, 3 to 7 parts of zinc oxide, 2 to 5 parts of metallurgical carbon black, 4 to 8 parts of carbon monofluoride, 4 to 8 parts of micronized wax, 3 to 7 parts of molybdenum powder, 10 to 14 parts of tin powder, 2 to 5 parts of manganese sulfide powder and 3 to 6 parts of alumina powder. The preparation method comprises the following steps of mixing, pressing, sintering, shaping and impregnating oil. The antifriction material has the advantages of high strength and hardness, good electrical conductivity and high-temperature heat stability, good lubricating property and small friction coefficient; moreover, the raw materials are easy to obtain, the processing cost is low, the preparation process is simple, parameters are easy to control, the production process is safe and environment-friendly, and the antifriction material is suitable for large-scale industrial production.

The invention provides a preparation device and preparation technology for polymer-based spherical powder. The preparation device comprises a grinding disc grinding system and an inductive coupling plasma powder nodulizing system, and the grinding disc grinding system of the preparation device achieves material ultrafine grinding under the room temperature condition by exerting strong extruding stress, cutting stress and circumferential stress to materials; and the inductive coupling plasma powder nodulizing system takes high-temperature plasmas as a high-temperature heat source, polymer powder is heated uniformly, the melting and cooling rate is high, and nodulizing treatment can be completed in an ultrashort time. According to the preparation device, the preparation process of the polymer-based spherical powder is integrated and achieves continuous production, the preparation technology is significantly improved, therefore, the polymer-based spherical powder material which has the excellent performance and can be applied to the SLS field is prepared, and large-scale batch production can be achieved.

The invention concretely relates to a non-stick pan free of fluoride and a manufacturing method of the non-stick pan free of the fluoride. According to the technical scheme, the manufacturing method includes the steps that the inner surface of an aluminum alloy pan substrate (3) is firstly coated with a transition layer (2), and the transition layer (2) is made of aluminum oxide or aluminum nitride; the aluminum alloy pan substrate (3) coated with the transition layer (2) is subjected to ultrasonic cleaning in an acetone solution and dehydration treatment through absolute ethyl alcohol and dried; finally, by the adoption of a multi-arc ion plating technology, a hard ceramic layer (1) of a TiC or TICN or TIN nanostructure is deposited on the dried transition layer (2) on the aluminum alloy pan substrate (3) to obtain the non-stick pan free of the fluoride. The thickness of the transition layer (2) is 10-50 micrometers, and cleaning time of ultrasonic cleaning is 10-60 min. The non-stick pan free of the fluoride is simple in technique, the manufacturing process is safe and environmentally friendly, and the obtained non-stick pan has the advantages of being free of the fluoride, free of damage to health of human bodies, good in abrasive resistance and long in service life.

The invention relates to a magnesium-silicon hydrate binding agent based on salt lake brine and a preparation method of the magnesium-silicon hydrate binding agent. The binding agent adopts a technical scheme as follows: firstly, a silicate solution in a molar concentration ratio of magnesium ion to silicon ion being (0.6-2.0):1 is added to the salt lake brine and stirred uniformly, and a mixed solution is obtained; then, the mixed solution is left to stand for 10-91 hours at 25-90 DEG C, washed and subjected to suction filtration, and a solid product and a filtrate are obtained respectively;next, the solid product is dried at 45-120 DEG C and ground, and the magnesium-silicon hydrate binding agent based on the salt lake brine is prepared. The filtrate is evaporated and crystallized, andone or two by-products of potassium chloride, sodium chloride and lithium carbonate is or are obtained. The method has the characteristics of being simple in process, high in yield, safe, environmentally friendly and short in period; the prepared magnesium-silicon hydrate binding agent based on the salt lake brine has high purity, excellent thermal stability and good use effect, and can be widelyused in the fields of magnesium refractory castables, environment-friendly concrete building materials and the like.

The invention discloses guanidyl macromolecule antibacterial nano microspheres and a preparation method thereof. The preparation method comprises preparation steps as follows: vinyl type monomers and GMA (glycidyl methacrylate) are subjected to soap-free emulsion polymerization, a P-GMA copolymer is obtained, then a copolymer emulsion reacts with polyhexamethylene guanidine hydrochloride or polyhexamethylen biguanid hydrochloride under the catalytic action of triethylamine, and finally, the guanidyl macromolecule antibacterial nano microspheres are obtained through centrifugal separation, washing and drying. The prepared antibacterial nano microspheres take water-soluble polyhexamethylene guanidine hydrochloride or polyhexamethylen biguanid hydrochloride as a shell, take a hydrophobic copolymer as a core, are easily dispersed in water and have an excellent sterilization effect. According to the method, a soap-free emulsion polymerization mode is adopted, and water is taken as a solvent, so that the method is environment-friendly, economical, effective and simple in process.

The invention relates to a moisturizing anti-wrinkle facial mask and a preparation method thereof. The moisturizing anti-wrinkle facial mask is prepared from the following components of an emulsifyingagent, a moisturizing agent, a preservative, skin moisten grease, a PH adjusting agent, anti-wrinkle restore matter and the balance of distilled water. The anti-wrinkle restore matter is prepared from the following ingredients of a Chrysanthemum bud extract, an aloe pectin extract, a calendula flower extract and a lemon extract. The preparation method comprises the following steps of S1 preparation of the anti-wrinkle restore matter, S11 preparation of the chrysanthemum bud extract, S12 preparation of the aloe pectin extraction, S13 preparation of the calendula flower extract, S14 preparationof the lemon extract and S2 preparation of the moisturizing anti-wrinkle facial mask. The moisturizing anti-wrinkle facial mask has the excellent effects of moisturizing, water retaining, allergy releasing, oxidation resistance and stain fading and repairing.

The invention discloses sugar-free health-caring meat sausages containing nutritional factors and a preparation method thereof. The sugar-free health-caring meat sausages containing the nutritional factors are prepared from pork as a main raw material, with addition of mogroside in replacement of white granulated sugar; and thus, sugar content of the meat sausages is reduced. In addition, artemisia arenaria seed powder, Chinese wolfberry fruit powder and apple dietary fiber are added, so that, the health-caring meat sausages are rich in a plurality of nutritional factors, thereby endowing themeat sausages with multiple health-caring functions, including improving immune functions of the body, resisting oxidation and so on. The sugar-free health-caring meat sausages containing the nutritional factors are prepared by the following steps: performing pretreatment on pork; mixing materials; carrying out pickling; carrying out sausage-filling; carrying out drying; carrying out baking; and carrying out packaging. The preparation method of the sugar-free health-caring meat sausages containing the nutritional factors is low in equipment cost, high in operability, feasible for large-scale production, safe and environmentally friendly in preparation processes, and easy to promote.