696 results about "Alkaline catalyst" patented technology

The invention provides a functional graded porous carbon microsphere and a preparation method and application thereof, the preparation method comprises the following steps: S1, mixing a soft template, a phenolic compound, a cross-linking agent and a basic catalyst, and reacting to obtain a thermosetting phenolic resin microsphere; s2, carrying out pre-carbonization treatment on the thermosetting phenolic resin microspheres to obtain a carbonized material; s3, performing physical activation on the carbonized material to obtain graded porous carbon microspheres; s4, performing heat treatment on the graded porous carbon microspheres to obtain functionalized graded porous carbon microspheres; the preparation method has the characteristics of simple process, environmental protection and economical efficiency, the functionalized porous carbon microspheres prepared by the method are uniform in morphology, and the pore volume, pore diameter and pore structure of the functionalized graded porous carbon microspheres can be accurately regulated and controlled, so that the functionalized graded porous carbon microspheres meeting application requirements are obtained.

The invention discloses narrow-distribution fatty alcohol-polyoxyethylene ether and a preparation method and application thereof.The preparation method mainly comprises the following steps that 1, fatty alcohol with different carbon chain lengths serves as an initiator and is subjected to an addition reaction with ethylene oxide under the action of a basic catalyst, and then an intermediate is prepared through the processes of acid neutralization, adsorption separation and the like; and (2) reacting the intermediate prepared in the step (1) with ethylene oxide under the action of a composite catalyst by taking the intermediate prepared in the step (1) as an initiator to prepare the narrow-distribution fatty alcohol-polyoxyethylene ether. The preparation method provided by the invention has the advantages of high reaction speed, high product yield and the like, the production cost of industrial products can be effectively reduced, the prepared narrow-distribution fatty alcohol-polyoxyethylene ether is narrow in relative molecular mass distribution, low in residual alcohol content and free of high-EO polyether components, and compared with a traditional fatty alcohol polyether product catalyzed by a single base, the narrow-distribution fatty alcohol-polyoxyethylene ether has the advantages that the reaction speed is high, and the product yield is high. The pour point is lower, and the wettability on fabrics and hard surfaces is obviously superior.

The invention belongs to the field of new energy materials and devices, and particularly discloses nitrogen self-doped phenolic resin-based hard carbon microspheres and a preparation method and application thereof.The preparation method comprises the following steps that nitrogen-containing phenol monomers, aldehyde monomers and a basic catalyst are mixed according to a certain sequence, and after prepolymerization is conducted at the low temperature, the nitrogen self-doped phenolic resin-based hard carbon microspheres are obtained; carrying out high-temperature hydrothermal reaction to obtain phenolic resin microspheres; and sequentially carrying out low-temperature carbonization treatment and high-temperature carbonization treatment to obtain the nitrogen self-doped phenolic resin-based hard carbon microspheres. Compared with the existing nitrogen-doped resin hard carbon preparation method, the nitrogen-self-doped phenolic resin hard carbon has the advantages that a nitrogen source is introduced into the phenolic resin hard carbon from the source end of the resin, the production process is simplified, and uniform distribution and atomic-scale doping of the nitrogen element are realized. The material is used for sodium ion batteries, has excellent long cycle stability, good rate capability and high specific capacity, and has industrial application prospects.

The invention discloses an organic wastewater adsorbent as well as a preparation method and application thereof, and belongs to the technical field of sewage treatment. Comprising the following steps: carrying out nitration reaction on styrene porous microsphere resin, and then carrying out reduction reaction to obtain amino-modified porous microsphere resin; the preparation method comprises the following steps: carrying out polymerization reaction on high-nitrogen-content amino organic small molecules and aldehyde group small molecules under the action of a basic catalyst in an adsorption polymerization manner to generate a nitrogen-doped organic porous polymer, and coating the surface of amino-modified porous microsphere resin with the nitrogen-doped organic porous polymer to obtain the organic wastewater adsorbent. The porous microsphere resin adsorbent with large adsorption capacity and high organic matter removal rate is synthesized by using the carrier advantage of styrene microsphere resin and introducing a porous heteroatom polymer on the microsphere resin. When the adsorbent is used, the adsorbent is directly added into an organic wastewater solution, and the removal rate of bisphenol A, aniline and tetracycline can reach 90% or above.

The invention belongs to the field of soft magnetic functional materials, and particularly relates to a low-loss high-superposition Fe-Si-Al magnetic powder core and a preparation method thereof, and the preparation method comprises the following steps: preparing a coating agent, passivating coated powder, bonding and lubricating, and pressing and annealing. According to the method, based on the hydrolysis characteristic of metasilicic acid and the hydrolysis promotion effect of the alkaline catalyst, nano-porous silicon dioxide is prepared as a coating agent, meanwhile, the etching effect of alkaline matter on silicon dioxide can effectively increase the specific surface area of the nano-porous silicon dioxide, and the bonding strength of the nano-porous silicon dioxide and iron-silicon-aluminum powder is improved; the vacuum calcination treatment not only removes residual reagents, but also promotes sufficient thermal decomposition of metasilicic acid into silicon dioxide for in-situ coating, and stabilizes the lattice structure of the metasilicic acid. The coating layer of the low-loss high-superposition Fe-Si-Al magnetic powder core is firm in combination, thin and uniform in thickness and stable and compact in structure, the hysteresis loss of the Fe-Si-Al magnetic powder core can be effectively reduced, the direct-current bias performance is improved, and rising of eddy-current loss is avoided.

The invention discloses coal tar mixed phenol novolac epoxy resin as well as a preparation method and application thereof. The preparation method of the coal tar mixed phenol novolac epoxy resin comprises the following steps: S1, in an inert atmosphere, mixing and stirring refined coal tar mixed phenol, a solvent and an acid catalyst, then adding an aldehyde solution, and reacting to obtain phenolic resin; s2, in an inert atmosphere, mixing and stirring phenolic resin, a phase transfer catalyst and epoxy chloropropane, preheating to 70-100 DEG C, reacting for 1-4 hours, cooling to 65-70 DEG C, dropwise adding a basic catalyst, heating to 80-85 DEG C, continuously reacting for 2-3 hours, and naturally cooling; and carrying out post-treatment. According to the preparation method and application of the coal tar mixed phenol novolac epoxy resin, operation is easy and convenient, control is easy, and batch production can be achieved conveniently; in addition, the refined coal tar mixed phenol is low in price, the production cost of the anticorrosive paint is greatly reduced, the performance of the paint is improved, and the economic benefits of enterprises are improved.

The invention discloses a heteroatom modified intrinsic microporous polymer material, a preparation method and application, and belongs to the technical field of environmental governance, and the preparation method comprises the following steps: (1) preparing nitro-substituted oxygen atom bridged calixarene from cyanuric chloride and nitro-substituted resorcinol in the presence of a basic catalyst; (2) reducing the nitro-substituted oxygen atom bridged calixarene into amino-substituted oxygen atom bridged calixarene; and (3) carrying out a Schiff base polymerization reaction on the amino-substituted oxygen atom bridged calixarene and a polyfunctional aldehyde group under a solvothermal condition to obtain the heteroatom modified intrinsic microporous polymer material. When the adsorbent is used, the adsorbent is directly added into a metal ion solution, the removal rate of dichromate radicals and manganese ions can reach 90% or above, and the adsorbed material can be repeatedly used after being washed by an acidic aqueous solution. And the polymerized material also has high water body stability, and is beneficial to recycling of the material.

The invention relates to the technical field of microsphere materials, in particular to microspheres and derivatives thereof, including phenolic resin-based hollow mesoporous carbon materials (hollow mesoporous carbon microspheres) and core-shell silicon dioxide microspheres as well as a preparation method and application thereof. The preparation method of the microspheres comprises the step of reacting resorcinol and aldehyde in a solvent in the absence of a surfactant in a system by taking ammonia water as a basic catalyst, when the molar ratio of the reaction amount of the aldehyde to the resorcinol is (0.5-1): 1, adding tetraethyl silicate to obtain microspheres; and carbonizing the microspheres and removing the silicon dioxide to obtain the phenolic aldehyde-based hollow mesoporous carbon microspheres. The preparation method provided by the invention can be used for preparing the hollow large mesoporous carbon microspheres under the reaction condition of no surfactant.

The invention relates to the field of phenolic resin adhesives, and particularly discloses a preparation method of a phenolic resin adhesive for a bamboo oriented strand board, which comprises the following steps: (1) phenol activation: adding phenol and a basic catalyst aqueous solution into a reaction kettle, and activating to form an intermediate state of phenate negative ions; (2) addition stage: adding a high-concentration formaldehyde reactant into the reaction kettle, and carrying out heat preservation reaction to generate hydroxymethyl phenol; (3) heating and replenishing: heating to 80 + / -2 DEG C, keeping the temperature, replenishing the formaldehyde aqueous solution into the reaction kettle, and keeping the temperature for 20-25 minutes; (4) polycondensation stage: adding a basic catalyst aqueous solution, heating to 90 + / -2 DEG C, and carrying out heat preservation reaction; and (5) terminating the reaction: after the heat preservation reaction, detecting the viscosity, cooling, and discharging to obtain the adhesive. The phenolic resin with the solid content of 60% or above can be prepared, the adhesive has excellent bonding performance, and the prepared shaving board is excellent in mechanical strength.

The invention discloses a dispergator of a polyurethane structural adhesive as well as a preparation method and application of the dispergator. The dispergator comprises a polar organic solvent, an alcohol additive, a basic catalyst, an ionic liquid and a surfactant. The dispergator is suitable for removing a bonding interface of a thermosetting polyurethane structural adhesive in a power battery module, the dispergation process is mild and safe, and swelling, fracture and interface release of the structural adhesive can be realized in a range from normal temperature to 55 DEG C. Compared with a traditional high-corrosion and high-energy-consumption dispergation means, the dispergation agent has the advantages of being high in degumming efficiency, little in residual gum, free of base material corrosion and the like, is suitable for the environment-friendly recycling and reusing scene of the retired lithium battery, and has good engineering practicability and popularization value.

The invention relates to the technical field of petrochemical proppants, and discloses a high-performance phenolic resin material which comprises the following components in percentage by weight: 60%-75% of modified phenolic resin, 5%-15% of a curing accelerator, 10%-20% of a flexibilizer, 5%-20% of a filler and 3%-10% of a multifunctional additive, the modified phenolic resin is prepared by the following steps: mixing a phenolic compound and a formaldehyde solution in a reaction kettle, adding a basic catalyst, and reacting to obtain a phenolic prepolymer; gradually adding a modifier containing a hydroxyl group, an epoxy group and a carboxyl group into the phenolic prepolymer, and simultaneously stirring to obtain a mixture; heating the obtained mixture for reaction to complete crosslinking modification reaction to obtain modified phenolic resin; and cooling the modified phenolic resin to room temperature for later use. By adopting the design of the multifunctional flexibilizer and the composite filler, the toughness and thermal conductivity of the material are improved, meanwhile, the curing efficiency is accelerated through the curing accelerator, and the industrial cost is reduced.

The invention discloses high-viscosity dimethyl silicone oil and a preparation method thereof.The preparation method comprises the following steps that a siloxane polymer is heated, a basic catalyst is added in the inert gas atmosphere, and a first mixture is obtained; continuously heating and adding an end-capping reagent into the first mixture in a vacuum environment for reaction to prepare a second polymer; adding a neutralizer into the second polymer for reaction to obtain a third polymer; and heating and devolatilizing light components in the third polymer in a vacuum environment to obtain the finished product silicone oil. A high-viscosity dimethyl silicone oil product prepared by carrying out a catalytic reaction in a potassium hydroxide silanolate-silicon-based phosphate catalytic neutralization system and then using a linear siloxane oligomer as a main polymer has the advantages of low polymerization intermediate volatile matter, high product viscosity and low molecular weight distribution coefficient, and has a wide application prospect.

The invention relates to the field of powder coatings, and particularly discloses a slow-release coated heat-curable powder coating catalyst composition, a powder coating and a preparation method of the powder coating. The slow-release coated heat-curable powder coating catalyst composition comprises: i) a component A, which is an inner core coated object and comprises at least one basic catalyst capable of promoting the ring-opening reaction of epoxy resin, and i) a component B, which is an outer core coated object and comprises at least one basic catalyst capable of promoting the ring-opening reaction of epoxy resin; ii) a component B, which is a coated shell comprising at least one crystalline solid unsaturated polyester resin or a semi-crystalline solid unsaturated polyester resin; the component C is a coating medium and comprises at least one alkane wax.The low-temperature powder coating can be cured at the ultralow temperature, the curing temperature is as low as 90-120 DEG C, the storage time of the low-temperature powder coating is effectively prolonged, and the requirement of a normal powder coating process is met.

The invention discloses a preparation method and application of active cationic chitosan nanoparticles, which comprises the following steps: reacting a low-molecular chitosan triethylamine hydrogen sulfate ionic liquid ([(C2H5) 3NH] HSO4) solution with an aldehyde compound ethanol solution to form Schiff base protection on chitosan C2-site amino, and then reacting with 2, 3, 5, 6-tetramethyl-4-piperidine-2-one to obtain the active cationic chitosan nanoparticles. The preparation method comprises the following steps: carrying out nucleophilic substitution reaction on chitosan C6 in the presence of a basic catalyst by using 2, 3-epoxypropyl trimethyl ammonium chloride, then adding a chemical initiator, carrying out grafting reaction on chitosan C3 and acrylic acid, and then removing Schiff base protection on chitosan C2. Carboxylate anions of acrylic acid and cations of chitosan are subjected to cross-linking self-assembly through a hydrothermal reaction, and the chitosan nanoparticles which are high in stability, small in particle size, uniform in distribution and efficient and lasting in function are obtained. The prepared nanoparticles are high in reaction activity, contain a large amount of quaternary ammonium salt, amino dication groups and carboxyl groups, and have wide application prospects in the fields of dye adsorption, heavy metal adsorption, textile function finishing and the like.

The invention relates to the technical field of phenolic resin preparation, in particular to high-temperature-resistant silicon-boron dual-modified phenolic resin and a preparation method thereof.The preparation method comprises the steps that firstly, specific silane, phenylboronic acid, a specific catalyst and ethyl alcohol are added into a reactor, after the reaction is completed, reduced pressure distillation is conducted to remove ethyl alcohol, and a boron-silicon modifier is obtained; 2, mixing a phenolic compound with a dehydrating agent, stirring, heating, sequentially adding a borosilicate modifier and a basic catalyst, adjusting the pH value, and carrying out a dehydration esterification reaction under a reduced pressure condition; 3, after the esterification reaction is finished, an aldehyde compound is added, stirring and heating are conducted, decompression dehydration and addition polycondensation reaction are conducted at the same time, and finally the boron-silicon modified phenolic resin is prepared. In the scheme, high-bond-energy boron-oxygen bonds and silicon-oxygen bonds are introduced into the phenolic resin, part of phenolic hydroxyl groups are blocked, the number of phenolic resin benzene rings is increased, and therefore the phenolic resin is prepared; the synthesized borosilicate phenolic resin has high residual carbon content and excellent high temperature resistance, ablation resistance and oxidation resistance, and has a wide application prospect.

The invention relates to a mud-resistant polycarboxylic acid water reducing agent and a preparation method thereof, and the mud-resistant polycarboxylic acid water reducing agent is prepared from the following raw materials in parts by weight: 90-260 parts of allyl-terminated polyether monomer; 20 to 32 parts of unsaturated acid monomer; 8-15 parts of an unsaturated ester monomer; 4-8 parts of a quaternary ammonium salt compound; 1.5 to 3.0 parts of an oxidizing agent; 0.2 to 0.4 part of a reducing agent; 0.8 to 1.5 parts of a chain transfer agent; and water; wherein the allyl-terminated polyether monomer is prepared from the following raw materials: unsaturated alcohol, an allyl compound and a basic catalyst. The polycarboxylate superplasticizer prepared by the method disclosed by the invention has the advantages of low mixing amount, high water reduction, good workability, low mixing amount sensitivity, excellent mud resistance, capability of remarkably improving the dispersion and adsorption performance of concrete, wide application range of mud content in sand and gravel materials and the like.

The invention relates to the technical field of heat energy storage materials, and particularly provides a silicon dioxide aerogel composite phase change heat storage material and a preparation method thereof. The method comprises the following steps: mixing an organic silicon source, absolute ethyl alcohol and deionized water according to a specific ratio, fully stirring to obtain a mixed solution, and dropwise adding an acid catalyst into the mixed solution at room temperature for hydrolysis reaction to obtain a hydrolysate; sequentially adding a drying control agent and an alkali catalyst, and standing for gelation reaction to obtain gel; adding an organic solvent to carry out aging reaction, and then adopting the organic solvent to carry out replacement for multiple times to obtain alcogel; replacing the alcohol gel with an organic solvent for multiple times to obtain wet gel, soaking the wet gel in an excessive molten phase change material, and carrying out normal-pressure solvent replacement and drying at 40 DEG C to obtain the phase change material, the loading capacity of octadecane in the obtained CPCM is about 83%, the phase change enthalpy reaches up to 192J / g, the heat conductivity is as low as 0.0812 W / m.K, and no obvious leakage occurs after 200 times of circulation.

The invention discloses a method for synthesizing 2-vinylpyridine by a one-pot method, which comprises the following step: by taking 2-methylpyridine and paraformaldehyde as raw materials and water as a solvent, synthesizing the 2-vinylpyridine by a one-pot reaction under the catalysis of a basic catalyst. According to the invention, 2-methylpyridine and paraformaldehyde are taken as initial raw materials, the raw materials are simple and easy to obtain, the production cost is reduced, and water is taken as a solvent, so that the use of a large amount of organic solvents is avoided, and the influence on environmental pollution is small. In the reaction, a basic catalyst such as triethylamine is used as a catalyst, a small amount of sodium hydroxide solid is added in the reaction process, the basic catalyst enables the whole system to be in an alkaline environment, and sodium hydroxide improves the depolymerization efficiency of paraformaldehyde and promotes the dehydration process of the reaction, so that the selectivity and yield of 2-vinylpyridine are improved.

The invention discloses a preparation method of high-temperature-resistant hydrophobic aerogel. The preparation method comprises the following preparation steps: (1) adding acid into a mixed solution of organic estersil or organic silicon and alcohol, controlling the pH value to 2-5.5, then adding silica sol, and stirring to obtain hydrolysate A; wherein the silica sol is a mixture of first silica sol with the D50 particle size of 8-20 nm and second silica sol with the D50 particle size of 50-100 nm; (2) adding a basic catalyst into the hydrolysate to obtain a sol substance B; (3) adding an opacifying agent and a flame retardant into the sol substance B to obtain a sol substance C; and (4) carrying out gelation, aging, hydrophobic modification and drying on the sol C to prepare the aerogel. The aerogel provided by the invention has excellent hydrophobic performance and extremely low water absorption rate at high temperature.

A resin composition containing an alicyclic epoxy resin, a basic catalyst, a phenolic hydroxyl group-containing compound, and a dye.

The invention provides a preparation method of methoxy hydroxyl-terminated silicone oil, which is mainly applied to a structure control agent in the field of silicone rubber, and comprises the following steps: by taking hydrolysate (a mixture of dimethyl cyclosiloxane and hydroxyl-terminated polydimethylsiloxane linear body) as a raw material, adding a basic catalyst under the protection of inert gas, adding an end-capping reagent a: a methanol solution, and reacting at the temperature of 60-80 DEG C for 1-2 hours; the preparation method comprises the following steps: adding an end-capping reagent b, namely water or alkoxy silane, into a reaction kettle, carrying out reflux reaction at 50-80 DEG C, adding an end-capping reagent b, namely water or alkoxy silane after the viscosity of the material is stable, reacting for 0.5 hour, filtering to remove the catalyst, and removing the catalyst to obtain the hydroxyl methoxy-terminated polydimethylsiloxane. The hydroxyl-methoxyl mixed end-capped polydimethylsiloxane prepared by the method has the advantages of high flash point, good safety performance and strong tear resistance, the molecular weight of the hydroxyl-methoxyl mixed end-capped polydimethylsiloxane is several times larger than that of dimethyldimethoxysilane, but the content of active groups of the hydroxyl-methoxyl mixed end-capped polydimethylsiloxane is equivalent to that of hydroxyl silicone oil. Therefore, redundant water molecules are not generated in the anti-structuring process, so that the structural stability of the sizing material is improved.

The invention belongs to the technical field of chemical engineering, and particularly relates to a cleaning method for a blocked material of a polycarbonate production device. According to the invention, a detergent is adopted to clean the blocking material in the polycarbonate production device, the detergent comprises 66-90 parts of phenol, 9.5-30 parts of diphenyl carbonate and 0.5-4 parts of a volatile basic catalyst, and the boiling point of the volatile basic catalyst is less than 130 DEG C. The detergent provided by the invention is used for cleaning blockage materials in the polycarbonate production device, does not introduce any impurities, meets the pressure-bearing requirement of the polycarbonate production device, and is good in actual cleaning effect, simple to operate and energy-saving.

A method for producing a lignin-modified resol-type phenolic resin, the method comprising: a step for obtaining a first mixture containing phenols, water, and lignin, the ratio of the phenols to the water being 1: 0.03 to 1: 1.5 in terms of the mass ratio of the phenols to the water; a step for obtaining a second mixture by heating the first mixture at a pH of 7 or less and a temperature of 70-120 DEG C to dissolve the lignin in the phenols and the water; a step for obtaining a third mixture by adding an aldehyde and a basic catalyst to the second mixture and adjusting the pH to 7.5-12; and a step for obtaining a lignin-modified resole phenolic resin by heating the third mixture at a temperature of 60-105 DEG C and reacting the lignin, the phenol, and the aldehyde in the presence of the basic catalyst.

The invention belongs to the technical field of organic compounds, and discloses a preparation method of butynediol diethoxy ether and butynediol polyethoxy ether. The preparation method of the butynediol polyethyoxyl ether comprises the following steps: mixing 1, 4-butynediol and a basic catalyst, then adding first ethylene oxide to carry out a first polymerization reaction, and after the reaction is finished, carrying out post-treatment to prepare butynediol diethyoxyl ether; and mixing the butynediol diethoxy ether with second ethylene oxide and a phosphazene salt catalyst, and carrying out a second polymerization reaction to prepare the butynediol polyethoxy ether. The butynediol diethoxy ether prepared by the method is light in color and narrow in molecular weight distribution. The polyethyoxyl butynediol with light color, narrow molecular weight distribution, low peroxide value and small 1, 4-butynediol residual quantity can be prepared by using the polyethyoxyl butynediol as a catalyst of a second polymerization reaction and using phosphazene salt as a catalyst of the second polymerization reaction by using the polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol polyethyoxyl butynediol.

The invention provides a preparation method of dicapryl carbonate, belongs to the field of preparation of dicapryl carbonate, and can solve the problems of unstable reaction system, low raw material conversion rate, low catalyst efficiency, poor phase contact effect, many side reactions, low product purity and poor quality in the existing preparation method of dicapryl carbonate. The preparation method of dicapryl carbonate comprises the following steps: fully mixing n-caprylic alcohol, a basic catalyst and a cosolvent, continuously dropwise adding low-grade dialkyl carbonate into the mixed solution for 5-10 hours through a liquid material distributor, carrying out ester exchange reaction, continuously extracting low-boiling-point substances, controlling the reflux quantity, and carrying out reduced pressure distillation to obtain the dicapryl carbonate. The method comprises the following steps: adding a cosolvent into a reaction solution, enabling the cosolvent with an initial addition amount to always exist in the reaction solution, after the reaction is finished, dealcoholizing by reduced pressure distillation, and removing impurities by washing to obtain a crude product of dioctyl carbonate, and rectifying to obtain a dioctyl carbonate product. The preparation method is high in raw material conversion rate and high in product yield, and the purity of the obtained product is gt; the content of impurities is low, and the method can be applied to preparation of cosmetics.

The invention discloses a preparation method of an aerogel laminated composite heat insulation pad, and relates to the technical field of aerogel heat insulation pads, and the preparation method comprises the following steps: mixing and dispersing a silane precursor and absolute ethyl alcohol, adding a basic catalyst, hydrolyzing to generate sol, and aging to form prefabricated sol; adding a flame retardant, a smoke retardant and reinforced fibers, dispersing and gelatinizing, and carrying out supercritical drying to obtain an aerogel block; and coating basalt fiber non-woven fabric with the aerogel slurry to form a base layer, laminating a plurality of layers, and carrying out hot-pressing curing, cooling, post-curing, cutting and edge covering to obtain the composite heat insulation pad. According to the invention, by optimizing the ratio of silane and a drying process, the pore structure and the thermal stability of the aerogel are obviously improved; the flame-retardant, mechanical and heat-insulating properties are improved through multi-component collaborative design, and the obtained heat-insulating pad has the characteristics of low heat conductivity, high strength, excellent flame retardance and light weight, and is suitable for multiple heat-insulating and flame-retardant fields.

The invention discloses a preparation method of photo-thermal anti-icing / deicing slurry, the photo-thermal anti-icing / deicing slurry and application. The preparation method comprises the following steps: in the presence of a basic catalyst, mixing an aqueous dispersion of nanocellulose with a polymer-based photo-thermal material monomer for reaction to obtain a first mixed solution; and mixing the first mixed solution with a water repellent agent solution, carrying out a grafting reaction, and carrying out centrifugal washing to obtain the photo-thermal anti-icing / deicing slurry. After the slurry prepared by the method is used for forming a coating, the problem that an anti-freezing surface is difficult to maintain an anti-freezing state in a long-time use state or a low-temperature and high-humidity environment can be well solved, and in addition, the coating can realize anti-icing and deicing, water and water proofing, thermal management, ultraviolet radiation prevention, photo-thermal sterilization, oil-water separation and the like of a solid surface.

The invention discloses a defoaming agent containing nano MOF and a preparation method and application thereof, and the defoaming agent is prepared from the following components in parts by weight: 1-5 parts of nano MOF, 10-20 parts of hyperbranched polyethyl siloxane, 10-30 parts of fluoropolyether, 1-5 parts of modified hydrophobic white carbon black, 1-5 parts of a base catalyst, 2-10 parts of an emulsifier and 1-3 parts of a stabilizer. The nano MOF in the defoaming agent is compounded with defoaming agents such as hyperbranched polyethyl siloxane and fluoropolyether, so that the high temperature resistance and chemical stability of the defoaming agent are improved. The nano MOF and the nano modified hydrophobic white carbon black are hybridized, and the hydrophobic nano MOF and the modified hydrophobic white carbon black are embedded into a hyperbranched skeleton, so that the mechanical puncture capacity of the particles is improved. The nano MOF can gradually release defoaming active components in the system, the defoaming duration is prolonged, and the foam inhibition performance of the defoaming agent in 3D printing is improved.

The invention relates to the technical field of lithium / sodium ion batteries, in particular to a preparation method of a highly graphitized coated carbon material based on phenolic resin, which comprises the following steps: uniformly mixing formaldehyde, resorcinol and a basic catalyst, and then catalyzing and curing; carrying out carbonization treatment on the uncarbonized phenolic resin based on a gradient heating method; mixing ethidene diamine, dichloromethane and carbonized phenolic resin, and heating in an oil bath; and placing the cured and coated graphitized phenolic resin in a tubular furnace for highly graphitizing. According to the preparation method of the highly-graphitized coated carbon material based on the phenolic resin, high ordering of a carbon layer is achieved through gradient heating graphitization, a carbon six-membered ring plane is promoted to expand, an ABAB stacked graphite structure is formed, the conductivity is effectively improved, a CVD coating and nitrogen doping synergistic technology is combined, a CVD reaction is formed through ethanediamine and dichloromethane, and the high-graphitization coated carbon material based on the phenolic resin is obtained. Functional groups such as pyridine-N and graphite-N are introduced to the surface of the carbon layer, so that the interface bonding force between the carbon layer and the matrix is enhanced, and the conductivity of the carbon layer is further improved.

The present invention discloses high temperature resistant silicon aluminum aerogel composite materials with red mud as raw material, preparation method and applications thereof, relates to a field of safe disposal and resource utilization of red mud. The method comprises step of pretreating the red mud; step of mixing and heating pretreated red mud with dilute acid solution for reaction; step of mixing with ethanol aqueous solution, heating and stirring, exchanging anionic resins, and adding alkaline catalyst for solution catalytic reaction; step of adding a modifier dropwise, heating and stirring, and then adding a chelating agent dropwise for ring opening reaction; Finally, compositing with a fiber substrate, through steps of gelling, aging and drying. The method greatly save preparation cost of aerogels, and also solve problem that current red mud waste cannot be effectively utilized and environmental pollution, and realize comprehensive utilization of the red mud and preparation of low-cost aerogel.