436 results about "Cellulose methyl" patented technology

The invention relates to the technical field of building material modification, in particular to an anti-freeze thawing-sulfate composite modifier and application thereof in a water-stable base layer. In road engineering, a water-stable base layer often faces the problems of freeze-thaw cycle and sulfate erosion damage. The key point of the technical scheme of the invention is as follows: on the basis of the mass of cement, a composite modifier is composed of the following components in percentage by mass: 2%-5% of sodium sulfate, 0.02%-0.05% of sodium gluconate, 0.4%-0.6% of polypropylene fiber, 0.1%-0.2% of steel fiber, 1%-3% of butadiene styrene rubber emulsion, 0.05%-0.5% of sodium carboxymethyl cellulose, 0.05%-0.1% of triethanolamine, 0.1%-0.5% of naphthalene water reducer, 0.005%-0.02% of air entraining agent, 8%-10% of silica fume and the like. The composite modifier is mainly used for the water-stabilized base, can effectively improve the freeze-thaw resistance and sulfate erosion resistance of the water-stabilized base, and prolongs the service life of a road.

The invention relates to the technical field of battery materials, and discloses a flame-retardant anti-shrinkage coating self-crosslinking lithium battery diaphragm and a forming process thereof, and the flame-retardant anti-shrinkage coating self-crosslinking lithium battery diaphragm is composed of a battery base membrane and coatings coated on the surfaces of the two sides of the base membrane; the battery base membrane is prepared from the following raw materials in parts by weight: 80 to 120 parts of polypropylene fiber, 5 to 10 parts of sodium dodecyl benzene sulfonate and 1 to 3 parts of polydimethylsiloxane; the coating is prepared from the following components in parts by weight: 10 to 20 parts of modified silicon dioxide coated aluminum oxide containing long-chain fatty acid, 80 to 150 parts of amino-terminated triethoxy silane modified polyurethane emulsion, 3 to 5 parts of defoaming agent polydimethylsiloxane and 2 to 4 parts of thickening agent sodium carboxymethyl cellulose. The thickness of the battery base film is 10-30 [mu] m, and the thickness of the coating is 3-8 [mu] m. The lithium battery diaphragm disclosed by the invention has relatively good flame-retardant and shrinkage-resistant performance, and meanwhile, the service life of a battery can be effectively prolonged.

The invention discloses a lignin-inorganic oxide composite binder, preparation thereof and application of the lignin-inorganic oxide composite binder in a hard carbon negative electrode. The preparation method comprises the following steps: firstly, carrying out quaternization modification on lignosulfonate to obtain quaternized lignosulfonate, and then utilizing the action of quaternary ammonium and sulfonate of the quaternized lignosulfonate, hydroxyl and inorganic oxyacid radicals of inorganic nano oxide and carboxyl and hydroxyl of sodium carboxymethyl cellulose to prepare the modified lignosulfonate. The lignin-inorganic oxide composite binder with the interpenetrating network structure is formed. According to the binder, sodium carboxymethyl cellulose serves as a hard phase to enhance the mechanical rigidity, quaternized lignosulfonate rich in flexible long chains serves as a soft phase to bear part of loads, and inorganic nano oxide rich in hydroxyl serves as a crosslinking point or physical filler to enhance the structural stability of the binder. Besides, a multi-network structure formed by hydrogen bond crosslinking not only endows the binder with an excellent ion transmission rate, but also helps to enhance the interfacial compatibility of the binder with an ester electrolyte, thereby significantly improving the rate capability and cycle performance of the hard carbon negative electrode.

The invention discloses a preparation method of salt-resistant sodium carboxymethyl cellulose, and relates to the technical field of petroleum fracturing materials. The preparation method comprises the following steps: reacting stearic acid with ethylenediamine to obtain a monosubstituted intermediate, reacting the monosubstituted intermediate with cocoyl chloride to obtain an intermediate 1, reacting the intermediate 1 with epoxypropane to obtain an intermediate 2, and reacting the intermediate 2 with paratoluensulfonyl chloride to obtain a hydrophobic intermediate; reacting a sodium carboxymethyl cellulose solution with the hydrophobic intermediate to obtain modified sodium carboxymethyl cellulose, and sulfonating the modified sodium carboxymethyl cellulose with sulfamic acid to obtain crude salt-tolerant sodium carboxymethyl cellulose; and reacting the crude product salt-resistant sodium carboxymethyl cellulose with borax to obtain the salt-resistant sodium carboxymethyl cellulose. The salt-resistant sodium carboxymethyl cellulose prepared by adopting a step-by-step synthesis strategy has excellent salt resistance, temperature resistance, shearing resistance and dissolution rate, and is suitable for thickening and sand carrying of high-temperature and high-salt oil and gas field fracturing fluid.

The invention relates to the technical field of biomedical materials, and provides a preparation method and application of cross-linked carboxymethyl cellulose. The preparation method comprises the following steps: S1, dissolving anhydrous calcium chloride in absolute ethyl alcohol, sterilizing and filtering to obtain a sterile calcium chloride solution; s2, adding the dehydrated and purified sodium carboxymethyl cellulose into a sterile calcium chloride solution, and stirring for reaction; s3, after the reaction is finished, suction filtration is performed, filter residues are collected and washed, residual calcium chloride is removed, then vacuum drying is performed, and cross-linked carboxymethyl cellulose is obtained. The cross-linked carboxymethyl cellulose and sodium carboxymethyl cellulose have high consistency in chemical activity, physiological and biochemical activity, biocompatibility and safety risk, but in physical performance, the cross-linked carboxymethyl cellulose is hydrogel fiber, is insoluble in water, can more remarkably maintain the volume of a filling part, and is longer in duration time, so that the cross-linked carboxymethyl cellulose is more stable in filling. And the effects of instant filling and long-acting filling of the microsphere-containing surface filling agent are realized.

The invention relates to the technical field of concrete, in particular to an anti-scouring ecological concrete formula for slope protection. The concrete comprises the following raw materials: 420-480 kg of cement; the coarse aggregate is 840 kg to 960 kg; the fine aggregate is 460 kg to 540 kg; the weight of the biochar is 90 kg to 120 kg; 6 kg to 10 kg of sodium carboxymethyl cellulose; 4 kg to 5.6 kg of a water reducing agent; 170 kg to 200 kg of water; in the formula of the anti-scouring slope protection ecological concrete, the raw materials are used and prepared, so that the pore structure of the concrete is optimized by the biochar, the compactness is improved, and the anti-scouring performance is enhanced; the sodium carboxymethyl cellulose is combined with the biochar to form a protective film with viscosity and toughness, so that the impact force of water flow is effectively buffered, and the loss of the biochar and the abrasion of the surface of the concrete are reduced; meanwhile, the water reducing agent reduces the water consumption, the strength and durability of the concrete are improved, and the anti-scouring capacity is further enhanced; under long-term water flow scouring or rainstorm erosion, the concrete can effectively keep the structure stable, the surface abrasion and peeling risks are reduced, and the engineering maintenance cost and potential safety hazards are reduced.

The invention discloses a graphene oxide-chitosan-carboxymethyl cellulose composite aerogel and an application of the graphene oxide-chitosan-carboxymethyl cellulose composite aerogel in adsorption of amaranth. The preparation method comprises the following steps: mixing a carboxymethyl cellulose aqueous solution with a chitosan acetic acid solution, adding gallic acid, stirring until the gallic acid is completely dissolved, adding the graphene oxide dispersion liquid, and stirring until a system forms uniform and stable gel; the gel is firstly subjected to ultralow-temperature freezing and then subjected to freeze drying, and finally the graphene oxide-chitosan-carboxymethyl cellulose composite aerogel is obtained. The aerogel prepared by the method is environment-friendly and stable in pore structure, and is a composite aerogel material with high adsorption capacity and good regeneration performance on anionic dyes. The adsorption capacity of the aerogel to amaranth can reach 125 mg / g, the adsorption rate is still kept at 77% after the aerogel is recycled for 3 times, and the aerogel is suitable for efficient treatment of dye wastewater.

The invention provides a temperature-sensitive hydrogel additive, a preparation method thereof and a hydrogel fire extinguishing agent. The temperature-sensitive hydrogel fire extinguishing additive comprises the following raw materials: a temperature-sensitive substance, a thickening agent, a cross-linking monomer, an initiator and a cross-linking agent in a mass ratio of (0.3-1.7): (0.2-0.9): (2-10): (0.1-0.3): (0.01-0.05), the temperature-sensitive substance is methyl cellulose and / or carboxymethyl cellulose, the thickening agent is carboxymethyl chitosan and / or chitosan, and the cross-linking monomer is acrylic acid. The temperature-sensitive type hydrogel fire extinguishing agent additive for the lithium battery fire disasters solves the problems that an existing fire extinguishing agent is weak in cooling capacity, low in fire extinguishing efficiency, poor in adhesiveness, high in reburning rate, not environmentally friendly in material and the like when coping with the lithium battery fire disasters, and can rapidly release water to absorb heat and cool under the high-temperature condition; meanwhile, a compact closed film layer is formed on the surface of the battery to isolate oxygen from being in contact with electrolyte, so that reburning is effectively prevented.

The invention discloses a method for removing lead and zinc in underground water of a mining area by using carboxymethyl cellulose modified nano zero-valent iron, which is characterized in that the underground water of the lead-zinc mining area is treated by using the carboxymethyl cellulose modified nano zero-valent iron, and the carboxymethyl cellulose modified nano zero-valent iron comprises nano zero-valent iron particles, the surface of the modified nano zero-valent iron is modified with carboxymethyl cellulose, and the mass ratio of the carboxymethyl cellulose to the iron element in the modified nano zero-valent iron is 1: (5-6). According to the invention, the adopted carboxymethyl cellulose modified nano zero-valent iron has the advantages of large specific surface area, many active sites, good mobility, good dispersibility, strong anti-interference capability and the like, can quickly adsorb lead and zinc in the water body, and can stably fix lead and zinc in the carboxymethyl cellulose modified nano zero-valent iron for a long time; the method has the advantages of simple process, low cost, high treatment efficiency, good removal effect, capability of ensuring long-term stability of heavy metal ions and the like, and is particularly suitable for long-term repair and treatment of lead and zinc pollution in underground water in mining areas.

The utility model discloses a sodium carboxymethyl cellulose drying processing device, which relates to the technical field of sodium carboxymethyl cellulose drying processing, and comprises a bottom frame, the upper surface of the bottom frame is fixedly connected with a panel, the upper surface of the panel is fixedly connected with a drying mechanism, and the drying mechanism comprises a first air blower. The bottom face of the first air blower is fixedly connected with the upper surface of the bottom frame, the input end of the first air blower fixedly communicates with an air filtering cover, the upper surface of the panel is fixedly connected with a heating bin, the right side face of the heating bin fixedly communicates with a rotating air pipe, the upper surface of the rotating air pipe fixedly communicates with a transmission, and the input end of the transmission is fixedly connected with a high-speed motor. The output end of the transmission penetrates through the rotary air pipe and is fixedly connected with a centrifugal spraying head, and the inner wall of the panel is fixedly connected with a drying tower. The sodium carboxymethyl cellulose drying processing device has the advantages of being small in size, compact in design and convenient to move, and the purpose of being convenient to use in small processing factories is achieved.

The invention provides light non-sintered ceramsite and a preparation method thereof, the non-sintered ceramsite is of a core-shell structure, an inner core is expanded perlite, a shell takes granite stone powder and desulfurized gypsum as main raw materials, and an interface modifier is added into the non-sintered ceramsite; the interface modifier comprises the following components in percentage by mass: 3%-8% of a silane coupling agent, 10%-18% of a nano silicon dioxide dispersion liquid, 25%-35% of a polyvinyl alcohol aqueous solution, 1.5%-3% of sodium carboxymethyl cellulose and the balance of deionized water. An interface modifier is added into the unfired ceramsite which takes expanded perlite as an inner core and takes a solid waste mixture such as granite powder and desulfurized gypsum as a shell, and the interface modifier can improve the physical and chemical characteristics of the surface of the expanded perlite and also can promote hydration reaction and interface bonding of shell slurry through a multi-component synergistic effect; the mechanical property and the stability of the unfired ceramsite are obviously improved.

The invention discloses a lithium battery pack with excellent cycle performance and a preparation method thereof, and belongs to the technical field of lithium battery pack preparation. The preparation method of the lithium battery pack with excellent cycle performance comprises the following steps: step 1, preparing positive electrode slurry by taking polyvinylidene fluoride, N-methyl pyrrolidone, an organic active substance and a modified conductive agent as raw materials, and coating the surface AB of an aluminum current collector with the positive electrode slurry to obtain a positive plate; step 2, graphite, carboxymethyl cellulose and deionized water are used as raw materials to obtain negative electrode slurry, and the AB surface of a copper current collector is coated with the negative electrode slurry to obtain a negative plate; and 3, winding the diaphragm, the positive plate and the negative plate into a roll core, vertically inserting the roll core into the steel shell, drying, injecting electrolyte, welding to obtain lithium batteries, and then connecting the lithium batteries in series to obtain the lithium battery pack. The lithium battery pack prepared by the method has excellent energy density, cycling stability and rate capability.

The invention discloses a preparation method of an environment-friendly lithium battery fire extinguishing agent based on nanofiber gel, and relates to the technical field of fire extinguishing. When the environment-friendly lithium battery fire extinguishing agent is prepared, nano sodium carboxymethyl cellulose reacts with N-isopropylacrylamide and N, N-methylene bisacrylamide to prepare semi-interpenetrating network hydrogel; the semi-interpenetrating network hydrogel and calcium lactate are cross-linked, and nano sodium carboxymethyl cellulose hydrogel is prepared; and mixing and stirring the nano sodium carboxymethyl cellulose hydrogel, the modified silicon carbide and a flame retardant to prepare the environment-friendly lithium battery fire extinguishing agent. The prepared environment-friendly lithium battery fire extinguishing agent has good fire extinguishing performance.

The invention belongs to the technical field of chemical production, and particularly relates to a sodium carboxymethyl cellulose processing and feeding device which comprises a rack, a conveying belt is arranged on the rack, and a flow dividing assembly is further arranged on the rack; the shunting assembly comprises a second frame body fixedly connected to one side of the upper end of the rack, the upper side of the second frame body is transversely distributed at equal intervals and sleeved with a plurality of connecting rods, the connecting rod on the leftmost side is fixedly connected with the second frame body, the other connecting rods are slidably connected with the second frame body, and a first check block is rotationally arranged on one side of the lower end of each connecting rod; the first check block is connected with a second check block in an inserted and sliding mode. According to the material receiving device, a plurality of feeding channels matched with the material receiving openings in position and specification can be formed on the conveying belt according to the number of the receiving devices and the width of the material receiving openings through the flow dividing assembly, production materials can accurately fall into all the material receiving devices along the feeding channels, and the material receiving effect is guaranteed.

The invention provides a polyurethane polishing pad and a preparation method thereof, the polyurethane polishing pad comprises a polyurethane mixture, the polyurethane mixture comprises a polyurethane prepolymer, a curing agent and a heat dissipation filler; in the polyurethane mixture, the mass percent of the polyurethane prepolymer is 50%-90%, the mass percent of the curing agent is 10%-30%, and the mass percent of the modified filler is 1%-10%; the water-soluble polymer compound system comprises polyvinylpyrrolidone, carboxymethyl cellulose and polyethylene glycol, the water-soluble polymer compound system is characterized in that the polyvinylpyrrolidone and the carboxymethyl cellulose are grafted to form a grafted copolymer, the grafted copolymer is compounded with the polyethylene glycol, and the mass ratio of the polyvinylpyrrolidone to the carboxymethyl cellulose in the grafted copolymer is 10: (1-2). The heat dissipation filler is added into the polyurethane, so that an effective heat dissipation effect can be achieved, the polishing uniformity is prevented from being affected by overheating of the polishing pad and the wafer, and the surface temperature of the polished wafer is moderate.

The invention discloses lithium ion diaphragm coating slurry and a preparation method and application thereof.The lithium ion battery diaphragm comprises a base membrane and a coating on the base membrane, the coating comprises a dispersing agent, potassium carboxymethyl cellulose and side-chain modified polyvinylidene fluoride, and the method for preparing the side-chain modified polyvinylidene fluoride comprises the steps that vinylidene fluoride, hexafluoropropylene, (S)-4-pentene-1, 2, 4-triazole-1, 2, 4-triazole-1, 2, 4-triazole-1, 2, 4-triazole-1, 2, 4-triazole-1, 2, 4-triazole-1, 3-triazole-1, 3-triazole-1, 2-triazole-1, the preparation method comprises the following steps: uniformly mixing 1, 2-diol, (S)-3-(trifluoromethyl) adipyl dichloride, an initiator, an auxiliary agent and a solvent, and reacting for 9-12 hours in an inert gas atmosphere at 75-80 DEG C under a stirring condition to obtain a reaction solution; and carrying out spray drying on the reaction liquid to obtain the side chain modified polyvinylidene fluoride. The coating slurry provided by the invention can realize firm bonding between the diaphragm and a pole piece at room temperature, improves the stability and safety of a battery structure, and remarkably reduces the internal resistance of the battery diaphragm at the same time.

The present application belongs to the technical field of underground filling of metal mines, and particularly relates to an iron tailings powder-based cementitious material for mine full tailings cemented filling, a preparation method and application thereof. The geopolymer-based anti-cracking mortar is made of iron tailings ultrafine powder, ore powder, sulphoaluminate clinker, Portland cement clinker, desulfurization gypsum and methyl cellulose ether. The iron tailings powder-based cementitious material can completely replace ordinary Portland cement in full tailings filling and achieve better cementing effect than cement, thereby greatly reducing the consumption of cement and other cementitious materials, lowering the filling cost, reducing carbon emissions and increasing the utilization rate of tailings. The rheological properties, mechanical properties and durability of the full tailings cemented filling material made of the iron tailings powder-based cementitious material can meet the requirements of mine filling, and the material can achieve the effect of expansion and roof contact without adding external additives, thereby solving the shrinkage problem of cement-based filling materials.

The invention discloses a waterproof dust suppressant for coal and a preparation method of the waterproof dust suppressant. Comprising the following steps: step 1, dispersing sodium alginate and sodium carboxymethyl cellulose in deionized water, stirring in a water bath at 50 DEG C, adding ammonium persulfate, then adding modified silicon dioxide, N, N '-methylene bisacrylamide and acrylamide, and raising the temperature to react to obtain a copolymer solution; step 2, mixing the copolymer solution, sodium dodecyl benzene sulfonate and carboxymethyl chitosan to obtain the waterproof dust suppressant. The preparation method has the beneficial effects that silicon dioxide is chemically modified, active groups are introduced to the surface of the silicon dioxide, and the crosslinking effect of the silicon dioxide and a high polymer material is remarkably enhanced, so that the mechanical strength and compactness of a dust suppressant curing layer are improved; and moreover, the introduction of hydrophobic groups on the surface enhances the waterproof performance. Meanwhile, due to the synergistic effect of the modified silicon dioxide, carboxymethyl chitosan and other components, the wind erosion resistance and water erosion resistance of the dust suppressant are further improved.

The invention belongs to the field of cellulose ether. The embodiment of the invention provides sodium carboxymethyl cellulose, a preparation method thereof and a dust suppressant. The method comprises the following steps: mixing cellulose, solid alkali and a solid etherifying agent to obtain a first mixture; adjusting the humidity of the first mixture by using a humidity adjusting medium to obtain flowable wet powder; mechanically activating the wet powder to obtain a second mixture; carrying out heating treatment on the second mixture, so that the second mixture is subjected to an alkalization reaction and an etherification reaction; carrying out neutralization treatment on the substance obtained by the heating treatment to obtain a neutral mixture; and sequentially carrying out dissolution treatment and purification treatment on the neutral mixture to obtain the sodium carboxymethyl cellulose. According to the method disclosed by the embodiment of the invention, a large amount of organic solvents such as isopropanol are not needed, so that the generation of waste liquid is reduced, and the environment-friendly treatment cost and the production safety risk are remarkably reduced.

The invention relates to the technical field of cellulose ether, and provides a method for reducing gel water insoluble substances in carboxymethyl cellulose. The method comprises the following steps: mixing alkali metal hydroxide, an organic solvent-water mixed solvent, a cellulose raw material and an additive, and carrying out alkalization reaction to obtain alkalization reaction liquid; the additive comprises a polyhydric alcohol; and mixing the alkalization reaction solution with an etherifying agent for etherification reaction to obtain the carboxymethyl cellulose. According to the method, the additive is added in the process of preparing the carboxymethyl cellulose by the slurry method, and a stable interface is formed among the cellulose, the alkali and the etherifying agent by utilizing the additive, so that the reaction uniformity is improved, and the content of gel water insoluble substances in the carboxymethyl cellulose is effectively reduced. The result of the embodiment shows that the content of gel particles in the product can be reduced from 49 to 23 by 53% when the carboxymethyl cellulose is prepared by adopting the method disclosed by the invention.

The invention discloses a bio-organic fertilizer for enhancing disease resistance of plants, and relates to the field of bio-organic fertilizers. The organic fertilizer is prepared by compounding brown algae residues, corn straws, composted chicken manure, sodium lignin sulfonate, a compound microbial agent and alginic acid-carboxymethyl cellulose composite gel. The preparation process comprises the following steps: a raw material pretreatment stage: crushing and drying brown algae residues, mixing the crushed and dried brown algae residues with corn straws subjected to alkaline hydrolysis treatment and decomposed chicken manure, and adding sodium lignin sulfonate for pre-fermentation; the compound microbial agent is compounded after being cultured step by step through bacillus subtilis and streptomycete; alginic acid and carboxymethyl cellulose are subjected to ionic crosslinking and ultrasonic treatment to form a three-dimensional gel network; mixing the pretreated substrate, the complex microbial inoculant and the gel, performing three-stage fermentation of heating, high temperature and cooling, granulating, and forming the slow-release particles by adopting a starch-alginic acid coating.

The invention belongs to the technical field of new energy materials, and discloses a hyaluronic acid (HA)-enhanced ternary composite hydrogel electrolyte and an application thereof in a flexible zinc air battery, the electrolyte is prepared from polyacrylamide (PAM), carboxymethyl cellulose (CMC) and hyaluronic acid (HA) through a cross-linking reaction, according to the formula, the high-temperature-resistant PAM / CMC composite material is prepared from 1 to 3 parts of PAM, 0.1 to 0.3 part of CMC, 0.05 to 0.15 part of HA, 0.03 to 0.07 part of a cross-linking agent MBAA, 0.01 to 0.03 part of an initiator KPS and 15 to 25 parts of deionized water. The electrolyte forms a multiple hydrogen bond network through an oxygen-containing functional group of HA, and has high water-retaining property, excellent mechanical property and high ionic conductivity (0.321 S / cm in an alkaline environment and 0.200 S / cm in a neutral environment). The flexible zinc-air battery based on the electrolyte respectively realizes the power density of 63.25 mW / cm < 2 > and 28.40 mW / cm < 2 > under alkaline / neutral conditions, has the cycle life of 45 hours and 25 hours (bending by 90 degrees), can drive electronic equipment (with the power of 10-200mW) such as an LED (Light Emitting Diode), a display screen and a mobile phone, and provides an efficient and stable energy supply solution for a wearable energy device.

The invention discloses a fluoride-free strong-acid-free reverse flotation method for extracting a high-purity quartz sand flotation product from granite pegmatite, and belongs to the technical field of mineral flotation. The method comprises the following steps: carrying out graded crushing and ore grinding on granite pegmatite to obtain slurry to be treated; carrying out wet magnetic separation on the to-be-treated slurry to obtain ore pulp after magnetic separation and magnetic-containing minerals; the pH value of the ore pulp is not adjusted, reverse flotation is carried out in the presence of a quartz mixed inhibitor, and a feldspar product and a quartz product are obtained; the quartz mixed inhibitor is a combination of a component A and a component B, wherein the component A is selected from at least one of sodium metasilicate, sodium tripolyphosphate, sodium hexametaphosphate, carboxymethyl cellulose and salinized water glass; the component B is selected from at least one of guar gum, Arabic gum, sodium humate and citric acid. The method is free of fluorine and strong acid, green and efficient, and is a method for preparing high-purity quartz sand from pegmatite with high industrial application feasibility.

The invention relates to the technical field of asphalt mixture processing, in particular to a high-asphalt-aggregate-ratio durable basalt fiber asphalt mixture with low-temperature crack resistance and a preparation method of the high-asphalt-aggregate-ratio durable basalt fiber asphalt mixture. The preparation method comprises the following steps: (1) soaking cleaned basalt fibers in a hydrochloric acid solution for pretreatment to obtain pretreated basalt fibers; (2) adding nano-hydroxyapatite, carboxymethyl cellulose and dodecanoic acid into an ethanol water solution for heating reaction, and collecting a product after purification; (3) adding the product into acetone, then adding the pretreated basalt fibers, and stirring to obtain modified basalt fibers; and (4) uniformly mixing the modified basalt fiber, the asphalt, the mineral powder and the aggregate in parts by weight, thereby obtaining the composite material. The preparation method is simple and easy for large-scale production, and the prepared mixture has excellent low-temperature crack resistance, water stability and high-temperature stability, which is of great significance for improving the quality of road engineering and prolonging the service life.

The present invention provides a graphene-carbon nanotube composite conductive cathode paste, and the conductive paste is composed of the following components: the mass ratio of active material: organic bentonite: polyacrylic acid: carboxymethyl cellulose: conductive agent is 70-97.5%: 0.1-5%: 0.5-15%: 0.5-10%: 1-5%; the solvent of the conductive paste is at least one of deionized water, absolute ethanol, and alkaline solution. The conductive agent is composed of carbon nanotubes: graphene: super conductive carbon black in a mass ratio of 0.5-1.5: 0.5-1.5: 1-2; the particle size of the graphene is 50-400 nm, and the carbon nanotube diameter is 5-10 nm. The active material consists of LiNi 0.8 Co 0.15 Al 0.05 O2 and LiMn2O4 in a mass ratio of 1.7-8:1. The graphene-carbon nanotube composite conductive cathode paste prepared by the present invention has good dispersibility and a long stable storage time.

The invention discloses a preparation method and application of a composite phase change material functional current collector, and relates to the technical field of functional current collectors. The composite phase change material obtained by compounding polyethylene glycol, graphene oxide, hydroxypropyl methyl cellulose and polyethyleneimine is roller-coated on the surface of the current collector, and is applied to a battery material to realize thermal management at high and low temperatures; the preparation method comprises the following specific steps: mixing and heating graphene oxide and polyethyleneimine to obtain polyethyleneimine modified graphene oxide, heating and melting polyethylene glycol, adding hydroxypropyl methyl cellulose, stirring, adding the polyethyleneimine modified graphene oxide, and continuously stirring to obtain the composite phase change material.

The utility model relates to the technical field of reaction kettles, and particularly discloses a sodium carboxymethyl cellulose esterification synthesis reaction kettle which comprises a reaction kettle body, a heating mechanism is arranged on one side of the reaction kettle body, a stirring mechanism is connected in the reaction kettle body and comprises a stirring shaft, a centrifugal disc is fixedly connected to the upper portion of the stirring shaft, and the centrifugal disc is fixedly connected to the lower portion of the stirring shaft. The heating mechanism comprises a heating box, a water inlet pipe and a water outlet pipe are respectively communicated between the upper part and the lower part of one side of the heating box and the reaction kettle, and a spiral pipe is connected between the water inlet pipe and the water outlet pipe; the spiral pipe is embedded in the reaction kettle, and the cross section of the spiral pipe is flat; according to the reaction kettle, the stirring sufficiency and the heating uniformity of raw materials can be improved, the layering phenomenon of the raw materials during reaction or the local high temperature or low temperature condition in the reaction kettle is avoided, and the reaction effect is ensured.

The positive electrode for a lithium-sulfur battery according to the present invention contains a predetermined amount of polyacrylic acid, polyacrylamide, carboxymethyl cellulose, and styrene-butadiene rubber as a binder polymer. When used in a lithium-sulfur battery, the positive electrode for a lithium-sulfur battery can ensure high adhesive strength between the positive electrode active material layer and the positive electrode current collector, and sufficient output performance.

The present application provides a kind of waste oil transesterification reaction catalytic system, belong to biomass refining field.The preparation steps of catalyst include: in the solution containing Ni (NO3) 2 And Fe (NO3) 3 Carboxymethyl cellulose is added, then urea is added, reaction is carried out, and nano-porous NiFe2O4 is obtained, MgCl2 / ZnCl2 Solution and KOH / K2CO3 Solution are added to NiFe2O4 water dispersion, reaction is carried out, solid product is collected, calcination is carried out, and catalyst is obtained.Catalyst is added to waste oil to carry out catalytic reaction.The present application adopts carboxymethyl cellulose to regulate the crystal form, grain size and dispersity of catalyst carrier, and the obtained solid magnetic catalyst can improve the production efficiency of waste oil for preparing biodiesel.The catalyst has high active site, fast reaction rate, mild reaction condition, can reduce reaction energy consumption and production cost.The catalyst also has good magnetic property, is convenient for recovery.The catalyst has good stability, improves the controllability and stability of reaction.

Provided are a probiotic patch for preventing and treating oral ulcers, a method for producing the same, and use thereof. First, the present invention provides a use of Lactobacillus paracasei in the production of a medicament for preventing and treating oral ulcers, wherein the Lactobacillus paracasei contains Lactobacillus paracasei ET-22 cells and / or its extracellular metabolites, and the Lactobacillus paracasei ET-22 is a strain with the deposit number CGMCC No. 15077. Further, the present invention provides a probiotic composition containing Lactobacillus paracasei ET-22 cells and / or its extracellular metabolites, sodium carboxymethyl cellulose, propolis, borneol, a lubricant, glycerin, and Tween 20. The probiotic composition of the present invention can be made into a patch, can effectively prevent and treat oral ulcers, is safe and reliable, and has a remarkable effect.