348results about How to "With self-healing function" patented technology

The invention discloses a self-repair material with a shape memory effect. The self-repair material is prepared from a shape memory polymer material, a shape memory function can be achieved under the stimulation of light, heat, electricity and magnetism, and moreover, the self-repair and healing purposes are achieved. The composition and preparation method of the self-repair material are diversified, the shape change and self-repair functions of the shape memory material can be achieved through different manners, and the application of the shape memory material in the fields such as spaceflight, aviation, medical treatment and bioengineering is expanded.

The invention relates to a method for manufacturing a self-healing silicon carbide ceramic matrix composite. The method comprises the following steps: preparing fiber preform; filtrating a pyrolytic carbon interface layer by chemical gas phase; carrying out thermal treatment on the interface layer; infiltrating silicon carbide and boron carbide substrate by chemical gas phase alternately; and depositing three silicon carbide coatings by the chemical gas phase. The method has strong designability, simple process and good repeatability. The ceramic matrix composite manufactured by the method has good high temperature resistance and oxidation resistance, has excellent mechanical performance and thermal performance, and can meet the use requirement of a sealing strip / an adjustment sheet, an interior cone and other components of a high thrust-weight ratio aeroengine.

The invention discloses multi-component super-molecular hydrogel and a preparation method of the multi-component super-molecular hydrogel. The hydrogel is formed by a component containing a strong hydrogen bond, a component containing a weak hydrogen bond and water, wherein the component containing the strong hydrogen bond is one or more of a carbon oxide nano tube, graphene oxide, a carboxylated ferroferric oxide nano particle, a carboxylated silver nano particle, a carboxylated quantum dot, polyacrylic acid, polypropylene glycol, polyvinyl alcohol, polyurethane, polyamide and poly(p-styrene) sodium sulfonate; and the component containing the weak hydrogen bond is a small-molecular compound or a high-molecular compound. A lot of cross-linking force of the hydrogel disclosed by the invention comes from the weak hydrogen bond so that the hydrogel is very sensitive to the stimulation of an external environment; when chemical components are proper, gel-sol conversion can be carried out under the effects of temperature rising, near-infrared light illumination and acids; and the conversion is reversible, namely the gel-sol conversion can be carried out under the effects of temperature reduction, removing of a near-infrared light source and alkalis.

The invention provides a preparation method of a hyperbranched polyurethane acrylate interpenetrating polymer network waterproof agent. The method comprises the following steps: (1), synthetizing a waterborne polyurethane prepolymer with ends partially capped; (2), introducing hydroxyl-terminated hyperbranched polyester, and grafting by virtue of reaction between isocyanate in the waterborne polyurethane prepolymer and the hydroxyl of the hyperbranched polyester, thereby obtaining a hyperbranched waterborne polyurethane prepolymer; (3), adding part of ethenyl monomers and a neutralizing agent, salifying, and adding deionized water while stirring at a high speed so as to realize dispersion, thereby obtaining a hyperbranched waterborne polyurethane emulsion; and (4), dropwise adding residual ethenyl monomers and an initiator into the hyperbranched waterborne polyurethane emulsion, thereby obtaining a hyperbranched waterborne polyurethane / acrylate interpenetrating network structure emulsion. The emulsion has excellent waterproof performance, good washable and abrasion-resistant performances and does not contain PFOA and PFOS. The hyperbranched structure has a self-recovery function, is capable of realizing self repairing of damaged regions and is long in waterproof performance duration time.

The invention belongs to the field of anticorrosion materials, and relates to a green and environment-friendly method for protecting metal from corroding, which can particularly control metal corrosion for long time effectively, and play a role in self-repairing the metal surface to a certain extent. The method is characterized in that an inhibitor molecule and polyelectrolyte are alternately deposited on the surface of a silicon dioxide nano-particle through green environment-friendly type metal inhibitor micromolecules and polyelectrolyte by adopting layer-by-layer self-assembly technology and utilizing the penetrating controllability of a polyelectrolyte self-assembly membrane so as to prepare a functional nano-particle with the inhibitor and the polyelectrolyte self-assembly composite membrane which are coated on the surface; and the prepared functional nano-particle is mixed with sol-gel to prepare the functional sol-gel membrane coated on the metal surface to be protected. The coating has the function of metal surface self-repairing, and ensures that the inhibitor molecules released by the functional membrane are adsorbed on the metal surface to reform a protecting membrane in a coating damaged microsection to play a certain role in self repairing. The method is applicable to corrosion protection of various metals.

The invention provides a black and odorous water / eutrophicated water treatment method and device, and application thereof. The method mainly comprises the following steps: (1) treating river course sediment; (2) treating by a bypass high-efficiency bioreactor; (3) oxygenating the river course; and (4) adding a microbial inoculant and a stimulant. The external sources are controlled: the upstream uncontrollable pollution source or severe black and odorous / eutrophicated water is pretreated by a bypass high-efficiency bioreactor, and the microbial-ecological restoration measures are taken to effectively control the black and odorous / eutrophicated water pollution sources. The black and odorous / eutrophicated water sediment is digested to reduce the endogenous pollution. The bypass high-efficiency bioreactor technique and the oxygenation technique are combined, so that the quality of the black and odorous / eutrophicated water is maintained; and the self-purification capacity of the water is enhanced, thereby providing a feasible restoration method for treating the black and odorous / eutrophicated water.

The present invention relates to technical field of biological material, and is especially suitable for surface modification field of biological medical material. Particularly the invention provides a medicine-taking degradable magnesium alloy cardiovascular bracket and a preparing method thereof. The aim of the invention is to reduce the initial degrading speed of magnesium alloy in biosome and carry therapeutic medicine on the surface of magnesium bracket thereby guaranteeing the mechanical performance of magnesium alloy bracket in vivo and better restraining the hyperplasia of newborn tunica interna. A fluoro-containing transition film is prepared on the surface of magnesium alloy bracket, and a medicine-carrying layer is prepared on the outer layer of magnesium alloy bracket. A protecting layer is the fluoro-containing transition film. The fluoro-containing transition film has self-concrescence capability in the degradation process of magnesium alloy and can effectively reduce the in-vivo degradation velocity of magnesium alloy bracket. The surface of degradable magnesium alloy cardiovascular bracket is smooth and is not easily generated with surface cracking and breaking-off. The medicine-taking layer is composed of medicine carrier polymer or protein and therapeutic medicine. The medicine-taking layer can release therapeutic medicine, reduce the generation rate of stenosis after the implantation of bracket and has a control function to the degradation velocity of magnesium alloy bracket.

The invention discloses water-based chromium-free fingerprint-resistant paint for a galvanized steel plate. The paint comprises raw materials in parts by weight as follows: 30.0-55.0 parts of a fluorine-modified water-based self-crosslinking acrylate emulsion, 0.1-1.5 parts of a neutralizer, 0.5-1.0 part of a silane coupling agent, 0.1-0.2 parts of laurocapram, 0.6-1.0 part of chlorinated paraffin, 4.0-8.0 parts of inorganic sol, 1.5-3.5 parts of metal salt, 0.1-0.3 parts of glycerin, 0.1-0.2 parts of sodium carboxymethylcellulose, 0.1-0.2 parts of polydimethylsiloxane, 1.5-5.5 parts of a cosolvent, 1.0-2.5 parts of aluminium dihydrogen phosphate and 40-50 parts of water; the curing temperature is as low as 40-60 DEG C, and energy consumption is reduced. The fluorine-modified water-based self-crosslinking acrylate emulsion is adopted to enable a film to have weather-resistant, waterproof and self-cleaning performance and the like, the film has a self-repairing function when damaged, and the forming processability is greatly improved. Low VOC (volatile organic compounds) emission is realized, and the problem of chromium passivation pollution is solved.

The invention discloses a rust-proof soft film composition and a preparation method thereof, belonging to the technical field of metal protection and particularly relating to a metal rust preventing technology. The rust-proof soft film composition disclosed by the invention comprises the following components in a formula in percentage by mass: 40-70 of film forming agent, 2-10 of corrosion and rust inhibitor, 1-5 of vapor phase inhibitor, 4-10 of microcapsule antirust agent, 0-10 of pigment, 1-3 of rheological agent, 0.2-1.0 of defoaming agent and 10-25 of solvent. The rust-proof soft film composition disclosed by the invention has an excellent rust-proof effect and an excellent self-repairing function; rust-proof gas volatilized by the film can meet the rust-proof requirements of inner and outer surfaces of workpieces with complex structures such as inner metal cavities, inner walls of pipelines, grooves and the like; when the rust-proof soft film is destroyed in a use process, a rust-proof core with an excellent self-repairing function of the microcapsule antirust agent can be automatically repaired, so that the condition that the rust-proof film is invalid in advance because of being destroyed is avoided, and the protection time of a protective film is prolonged; and the rust-proof soft film composition can comprehensively meet the requirement for metal rust-proof protection under severe environments such as outdoor sun and rain, sand-dust and the like.

A modified gear oil can be used for extreme worm oil, open industrial gear oil and closed industrial gear oil in traffic transportation, machinery, metallurgical, chemical industries. In the mineral lube-oil or synthetic lube-oil, modified nano-carbon with average grain size 2-6nm is added as extreme anti-scuff agent and oily agent, quality fraction is 2X10-5-1X10-2, nano-diamond occupies 10-99%, wear rate is decreased by 46.7%, mechanical efficiency improves by 2.84%, polishing scratch depth is decreased from 4.94 mu m to 0.07 mu m.

The invention belongs to the field of construction materials, in particular to an aqueous infiltrating crystallization type waterproof agent and a preparation method thereof. The aqueous infiltrating crystallization type waterproof agent comprises tartaric acid, sodium fluoride, silica sol, silane emulsion and water. The aqueous infiltrating crystallization type waterproof agent is aqueous waterproof admixture comprising a plurality of active chemical components and has high infiltrating ability and lower surface tension. After the aqueous infiltrating crystallization type waterproof agent is applied to the basal plane of concrete, an active compound is infiltrated and diffused in the concrete and reacts with a hydrated product in the concrete in a pore to generate a needle or fiber-shaped crystal so as to block the pore, thereby compacting the concrete and playing the roles of preventing water, ventilating, increasing the compression resistant strength, and the like.

The invention relates to a protective film with self-repairing and oil stain-preventing functions, in particular to self-repairing and oil stain-preventing coating and a preparation method thereof, and a protective film containing the same and a preparation method thereof. The self-repairing and oil stain-preventing coating is prepared from the following raw materials in parts by weight: 10-80 parts of polyol, 1-50 parts of isocyanate, 1-10 parts of an auxiliary agent, 0.1-10 parts of an ultraviolet light absorber, 0.01-10 parts of an antistatic agent and 1-50 parts of a solvent. The protective film sequentially comprises a first release film, the self-repairing and oil stain-preventing coating, a film substrate, an ultraviolet blocking pressure-sensitive adhesive layer and a second release film. The protective film has a more excellent self-repairing function, a more excellent oil stain-preventing function and more excellent weathering resistance, can be self-repaired at room temperature within a short time, and has a better protective effect.

The invention discloses quick-drying scratch-resistant varnish composition with high solid content. The quick-drying scratch-resistant varnish composition comprises varnish and a curing agent in a volume ratio being 2:1, wherein the varnish comprises components in parts by weight as follows: 60-80 parts of acrylic resin, 3-20 parts of polyester resin, 0.4-1 part of a leveling agent, 0.02-0.5 parts of a catalyst, 1-2 parts of an ageing-resistant auxiliary and 10-20 parts of a first solvent; the curing agent comprises components in parts by weight as follows: 60-80 parts of isocyanate and 10-20 parts of a second solvent. The quick-drying scratch-resistant varnish composition with high solid content has quick-drying performance and scratch resistance, further has good paint film property, workability and high construction solid content and is particularly applicable to painting for automobile repairing, and the VOC (volatile organic compounds) can be reduced to 420 g / L or lower.

The invention provides a flexible sensor and a preparation method thereof. The flexible sensor comprises a flexible substrate, electrodes, a liquid metal film and a flexible package layer; the liquidmetal film is located on the flexible substrate and composed of liquid metal particles with the oxidized surfaces; the flexible package layer is located on the surface of the liquid metal film; the electrodes are located on the flexible substrate and used for monitoring an electric signal in a certain area of the liquid metal film; and under the effect of external force, the resistance between theelectrodes is changed from the high resistance into the low resistance, and the external force is judged to be harmful external force. The flexible senor can sense the outside harmful external force,and the function of electronic skin can be expanded by integrating the sensor in the electronic skin.

The invention discloses a high-performance thermoelectric device and an ultrafast fabrication method thereof. In the high-performance thermoelectric device, a segmented structure is employed to perform optimal matching of a thermoelectric material and a temperature difference environment, a blocking layer and a buffer stress layer are employed to reduce interface element migration and longitudinalcontact thermal expansion stress and improve bonding strength, a phonon scattering layer and a negative thermal expansion buffer layer are embedded to fix a thermoelectric leg so as to improve internal thermal resistance and horizontal thermal matching performance of the high-performance thermoelectric device, internal package and external package are employed to prevent the thermoelectric material from being oxidized and sublimed and improve external collision-resistant capability, the technical bottlenecks of low energy conversion efficiency, small specific power, poor thermal stability, poor collision performance, complicated fabrication process and the like of a traditional thermoelectric device are effectively broken through, meanwhile, the thermal stability and the mechanical structural performance of the high-performance thermoelectric device are improved to a great extent, long-term and excellent electrical output performance is guaranteed, and the working environment is expanded.

The invention discloses injectable self-repairing hydrogel based on polysaccharides, a preparation method and application of the hydrogel to biological tissue engineering, and belongs to the technical field of high polymer materials. The method includes the steps of modifying natural high polymer chitosan so that the defect that the chitosan can only be dissolved in acid solutions can be overcome and the dissolubility of the chitosan in water can be improved; conducting mixing reaction on the chitosan and a modified sodium hyaluronate derivative solution, delaying the reaction time or raising the temperature so that sol can be converted into gel and hydrogel can be endowed with the injection characteristic and the self-repairing characteristic. It is shown through cell co-culture experiments that the intelligent hydrogel has the advantage of high biocompatibility, degradability and the like. The injectable self-repairing hydrogel as a novel medical high polymer carrier material has potential biological and medical application value when used for the co-culture together with cells, protein, DNA, antigens and other active substances, and even the delivery, release and other aspects of medicine and other in-vitro substances.

The invention relates to a multifunctional current impulse transmitter and a control method. The transmitter is formed according to the following method: the positive electrode of a two-gear direct current power supply is connected with a depressurization chopping constant-current circuit, a clamping circuit, a short-circuit and bridge arm direct connection protective circuit, a bipolar current impulse generator and a load through a switch K; and the negative electrode of the two-gear direct current power supply is connected with the load through the depressurization chopping constant-current circuit and the bipolar current impulse generator. According to the invention, the two-gear direct current power supply is adopted to coarsely regulate an output voltage; the depressurization chopping constant-current circuit is used so as to precisely regulate the output voltage, thereby reducing the variation range of the duty ratio of the depressurization chopping constant-current circuit and improving efficiency; the clamping circuit can perform bootstrap on a capacitor of a clamping voltage source to generate a high voltage in no need of improving the voltage of a direct current power supply or providing an auxiliary power supply; the linearity and the steepness of the failing edge of the current impulse are changed through regulating the voltage of the linear clamping voltage source; and the short-circuit and bridge arm direct connection protective circuit is matched with an impulse controller, so that the circuit has a self-repairing function after a failure is removed.

The invention discloses self-healing polyanion-chitosan quaternary ammonium salt hydrogel and its use in the field of pharmaceutical biology. A preparation method of the hydrogel comprises respectively preparing a polyanionic solution and a chitosan quaternary ammonium salt solution, fully mixing the solutions so that the solutions are spontaneously aggregated under electrostatic interaction and undergo a gelation reaction, and collecting solid precipitates so that the polyanion-chitosan quaternary ammonium salt hydrogel is obtained. The hydrogel raw materials have wide sources and low prices. The hydrogel has good biocompatibility and has self-healing properties and in the process of formation, an organic solvent and acid-base environments are avoided so that the above properties lay the foundation for use of the hydrogel in the field of biomedicines. The hydrogel can be used for drug and protein positioning delivery and has injectability and high adhesion. When being used in tissue regeneration scaffolds, the hydrogel has the advantages of mild preparation condition, controllable shape and high water content, and is a good extracellular matrix material.

The invention discloses a reaction-type flame-retardant epoxy resin microcapsule. The reaction-type flame-retardant epoxy resin microcapsule comprises a capsule core and a capsule wall, wherein the capsule core is 30 to 70 percent by mass of phosphorus-containing epoxy resin, and the capsule wall consists of the following ingredients by mass percent: 15 to 55 percent of phosphorus-containing acrylate, 15 to 45 percent of epoxy acrylate, 10 to 50 percent of a polymerizable emulsifier, 0.5 to 3 percent of an acrylate crosslink agent and 0.1 to 0.5 percent of a photoinitiator. The invention also discloses a method for preparing the microcapsule. The microcapsule has the following advantages that the flame resistance and self-repairing function are good, so that the microcapsule can be widely applied to the fields such as thermosetting self-repairing resin-based composite materials and coatings. The method for preparing the microcapsule adopts an ultraviolet interface in-situ polymerization method, so that not only is the process simple and less time consumed, but also the method is controllable, the safety of the prepared composite material can be improved, and the service life of the composite material can be prolonged.

The invention relates to anti-rust oil for steel corrosion protection and a preparation method of anti-rust oil, in particular to solvent type thixotropic anti-rust oil and a preparation method thereof and belongs to the field of metal protection. The solvent type thixotropic anti-rust oil is prepared from components including, by weight, 5-30% of an anti-rust agent, 0.1-5% of a thixotropic agent, 0.1-5% of a film-forming agent, 0.1-3% of a coalescing agent, 5-20% of the base oil and the balance of dearomatization solvent oil. The thixotropic agent is combined with oil-soluble polyaniline, so that good salt fog resistance of the anti-rust oil is achieved, and time for salt fog can reach more than 400 hours.

The invention discloses a method for realizing the format conversion of the package mode data from the higher bit wide to the lower bit wide using the frame positioning, characterized by that the method comprises, (1) conducting super-long package detection for the input package, processing the packages exceeding the preset package length into the standard package, (2) adding the package length information of the status signal of the input packages to transform them into the frame header of the lower bit wide, and storing it in the previous address of the data package header, (3) by performing frame header positioning to the lower bit wide data, recovering them into the higher bit wide data having the status information. The invention has the advantage of saving storage resource, convenient format conversion and having self-curing function.

The invention relates to an inhibitor in an aqueous heat exchange medium for La-Fe-Si series room temperature magnetic refrigeration materials, which belongs to the field of functional materials and can significantly improve the corrosion resistance of the La-Fe-Si series room temperature magnetic refrigeration materials in an aqueous heat exchange fluid. The inhibitor consists of the following components in percentage by weight: 0.1 to 10 weight percent of molybdenate, 0 to 5 weight percent of dichromate, 0 to 8 weight percent of nitrite, 0.5 to 3 weight percent of orthophosphate, 0.05 to 2 weight percent of silicate, 0 to 1 weight percent of borate, 0 to 3 weight percent of sodium benzoate, 0 to 0.1 weight percent of zinc sulfate, 0 to 0.5 weight percent of sodium carbonate, and 0 to 10 weight percent of triethanolamine. The inhibitor has the characteristics of a small usage amount, simple using method and high corrosion inhibition efficiency, and can significantly improve the corrosion resistance of the magnetic refrigeration materials after being added into the aqueous heat exchange medium.

The invention discloses a preparation method and an application of a viscous anti-seepage material. The preparation method adopts the following raw materials in part by weight: 0-5 parts of coal ash, 30-60 parts of kaolinite, 40-80 parts of bentonite, 1-3 parts of polyacrylic acid, 0-3 parts of polyacrylamide, 0-3 parts of polyacryl acid ester and 0-2 parts of hexadecyl trimethyl ammonium chloride, the raw materials are fully mixed to obtain the anti-seepage material with the 1.15-1.20 g / cm<3>. The viscous anti-seepage material is mainly used for a 'sandwich'-type anti-seepage system. The invention has the advantages that the anti-seepage performance and the self-recovery function are excellent, the structure is simple, the price is low, the construction is convenient and secondary pollution can not be caused to the environment.

The invention discloses a conductive ink composition with self-repair functions, a method for preparing the conductive ink composition and application thereof. The method includes steps of stirring and heating polyester or polyether glycol until the temperature of the polyester or polyether glycol reaches 80-100 DEG C, dehydrating the polyester or polyether glycol under the condition of the vacuum degree lower than 0.1 MPa for 0.5-3 h, cooling the polyester or polyether glycol until the temperature of the polyester or polyether glycol reaches 50 DEG C, adding polyisocyanate and polar solvents into the polyester or polyether glycol, carrying out stirring reaction at the temperatures of 60-120 DEG C for 2-14 h and cooling first reaction products until the temperatures of the first reaction products reach 50 DEG C; adding chain extenders with disulfide bonds, hyperbranched structures and active hydrogen atoms into the first reaction products, continuing to carry out reaction at the temperatures of 60-120 DEG C for 2-14 h, uniformly mixing second reaction products and organic silver salt solution with one another and carrying out reduced pressure distillation to obtain the conductive ink composition with the self-repair functions. The conductive ink composition with the self-repair functions, the method and the application have the advantages that self-repair can be carried out under heating and UV (ultraviolet) light illumination conditions, the conductive ink composition is free of mixed particles, the solid content of silver can be obviously increased, and the uniformity of ink can be obviously improved; the conductive ink can be used for writing on base materials such as paper, glass and plastics in writing brush and silk-screen printing modes and the like, and the conductive ink composition is excellent in conductivity by means of formaldehyde solution reduction and is suitable for flexible circuits.

The invention discloses a compound concrete expanding agent. The compound concrete expanding agent is prepared by using the following components in parts by weight: 15 to 20 parts of calcium aluminosilicate, 25 to 30 parts of calcium sulphoaluminate, 20 to 30 parts of sulfur fixation waste residue, 10 to 20 parts of red mud, 10 to 15 parts of lithium slag, 4 to 8 parts of modified calcium oxide, 3 to 6 parts of magnesium oxide, 5 to 8 parts of methyl sodium silicate, 0.1 to 0.3 part of azodicarbonamide, 0.4 to 0.7 part of sodium tripolyphosphate, 2 to 4 parts of lauryl sodium sulfate, 0.3 to 0.6 part of ethylene-acrylic acid copolymer, 0.7 to 0.9 part of polycarboxylate superplasticizer and 0.5 to 0.7 part of nano calcium carbonate. The compound concrete expanding agent has the advantages of high strength, good compensation capability, calcium oxide reaction regulation and the like, and is a concrete additive which has a great development prospect.

An OLED packaging structure comprises an upper glass substrate, a lower glass substrate and a glass packaging material, wherein the glass packaging material connects the upper glass substrate and the lower glass substrate; and a water heat release layer is arranged on the inner layer of the glass packaging material. A metal sodium layer is arranged on the inner side of the glass packaging material of the OLED packaging structure; and a light emitting product which adopts the OLED packaging structure, such as a display or the like is used for a certain period of time, an OLED packaging process is difficult to meet an ideal requirement, and the glass packaging material can have cracks or bubbles, so that external water molecules enter the inside of the OLED packaging structure. When water vapor encounters the water heat release layer, the water vapor can release a large amount of heat, about 500-600 pats of the heat, so that the glass packaging material can reach a molten condition again; the glass packaging material with certain fluidity refills or seals the cracks and other areas which the water vapor can pass through, an OLED device has a self-healing function, and the service life of the OLED structure is prolonged.

The invention belongs to the related field of polymer electrolyte systems. The invention discloses a single-ion polymer electrolyte system as well as a preparation method and application thereof. Thesingle-ion polymer electrolyte system is composed of a single-ion polymer electrolyte and a metal salt, wherein the single-ion polymer electrolyte is obtained by carrying out reversible addition-fragmentation chain transfer polymerization reaction on three monomers including a single-ion conductor lithium salt containing a p-styrenesulfonyl group, UPyMA containing quadruple hydrogen bonds and methoxypolyethylene glycol methacrylate. According to the invention, the key structure and related composition in the single-ion polymer electrolyte system, the overall process flow of the preparation method and other aspects are optimally designed; and, compared with the prior art, the invention is advantageous in that not only can the phenomenon that a polymer electrolyte system is easy to crack bebetter solved, but also the metal ion transference number and the ionic conductivity can be remarkably improved, and meanwhile, the growth of metal dendrites is effectively inhibited, so that the polymer electrolyte is particularly suitable for the field of metal ion batteries such as lithium ion batteries.

This invention discloses a composite daub of graphite bricks and SiC bricks for building stacks of furnaces, in which, the daub is composed of SiC, graphite, binder, antioxidation agent and a solidifying agent mixed in proportion, since SiC has high intensity under high temperature, the graphite material has high heat conduction performance and the binder strengthens the adhesive performance and anti-high temperature performance of the daub, the solidifying agent strengthens the plastic and self-modification function of the composite daub under high temperature, the invented daub has the property of high heat-conduction coefficient and hot state high intensity under 800-1400deg.C and can be used in building composite kiln lining composed of graphite bricks and SiC bricks.

The invention discloses a concrete expanding agent. The concrete expanding agent is prepared from, by weight, 10-15 parts of calcium silicoaluminate, 20-30 parts of calcium sulphoaluminate, 5-9 parts of ferric sulfate, 20-25 parts of sulfur-fixing waste residues, 15-20 parts of red mud, 6-8 parts of modified calcium oxide, 4-6 parts of magnesium oxide, 4-8 parts of sodium methyl silicate, 3-5 parts of triethanolamine, 0.1-0.3 part of azodicarbonamide, 0.5-0.7 part of sodium gluconate, 2-4 parts of sodium laurylsulfate, 0.4-0.6 part of polyethylene glycol, 1-3 parts of polycarboxylate superplasticizer, 2-6 parts of modified pyrophillite powder and 1-3 parts of nano calcium carbonate. The concrete expanding agent has the advantages of being high in strength, good in compensation capability, capable of regulating and controlling a calcium oxide reaction and the like and is a concrete additive having the development prospect.