716results about How to "Low water absorption" patented technology

The invention belongs to the technical field of copper-clad plates, and relates to a low-dielectric high-heat-resistance copper-clad plate and a preparation method thereof. By introducing the POSS resin, the dielectric constant of the copper-clad plate is effectively reduced, which is crucial for reducing signal delay and improving signal transmission efficiency. The introduction of the POSS resin not only improves the dielectric properties of the material, but also improves the glass transition temperature (Tg) of the material, which means that the physical and chemical properties of the material can be kept unchanged at a higher temperature, and the material is suitable for wider environmental conditions. By using the resin and the inorganic filler in a specific ratio, the copper-clad plate shows excellent copper foil peel strength, and ensures that the bonding force between the copper foil and the base material is not easily weakened under long-term use or severe conditions. Meanwhile, the material also has excellent CAF (conductive anode wire) resistance, can effectively prevent internal short circuit caused by moisture, and prolongs the service life of an electronic product.

The embodiment of the invention provides a lithium slag-based unfired lightweight aggregate and a preparation method thereof. The raw materials of the lithium slag-based unfired lightweight aggregate comprise a raw material and water, and the raw material comprises the following components in percentage by mass: 25-60% of lepidolite slag, 10-50% of solid waste and 5-40% of cement; the lepidolite slag comprises aluminosilicate and harmful elements such as fluorine, beryllium and thallium; the solid waste comprises the following components in percentage by mass: 10-70% of silicon dioxide, 2-30% of aluminum oxide and 10-60% of calcium oxide. Harmful elements in the lithium slag-based unfired lightweight aggregate are stably cured, the cylinder compressive strength is relatively high, the water absorption rate is relatively low, and the density is adjustable. The preparation cost is low, the production process is simple, large-scale production is easy, and the material can be applied to the fields of roadbed materials, building materials and the like.

The invention relates to the technical field, and particularly discloses a nano-modified epoxy building thermal insulation material and a preparation method thereof. The nano modified epoxy building thermal insulation material is prepared from the following raw materials in parts by mass: 80 to 120 parts of Portland cement, 20 to 40 parts of slag powder, 5 to 10 parts of hollow mesoporous silicon dioxide, 0.1 to 1 part of pyrrole, 0.1 to 0.2 part of ammonium persulfate, 5 to 10 parts of nano silicon dioxide, 10 to 15 parts of bisphenol S epoxy resin, 1 to 5 parts of acrylic acid, 1 to 2 parts of polylysine, 0.01 to 0.1 part of catalyst and 1 to 2 parts of curing agent. The concrete is prepared from the following raw materials in parts by weight: 20-30 parts of epoxy resin, 4-8 parts of loaded aerogel, 0.1-1 part of polycarboxylate superplasticizer, 1-4 parts of composite fiber and 0.2-1.25 parts of hydrogen peroxide. The fireproof building material has excellent toughness, can better resist cracking and absorb energy, effectively avoids cracking and damage under the action of thermal stress, and ensures that the building material has a fireproof effect.

The invention discloses a carbon-coated sodium ferrous sulfate phosphate positive electrode material as well as a preparation method and application thereof. The carbon-coated sodium ferrous sulfate phosphate positive electrode material is square flaky particles formed by coating sodium ferrous sulfate phosphate with a conductive carbon material and irregular aggregates of the square flaky particles. The molecular formula of the sodium ferrous sulfate phosphate is Na (6-2x + y) Fex( SO4) (3-y) (PO4) y, x is more than 0 and less than 3, and y is more than 0 and less than or equal to 0.5. The invention also discloses a preparation method and application of the carbon-coated sodium ferrous sulfate phosphate positive electrode material. The positive electrode material has the advantages of phosphate and sulfate positive electrode materials, the voltage platform is high, the conductivity is excellent, the air stability is good, and the assembled battery has excellent chemical sodium storage performance, high discharge specific capacity, highly reversible charge-discharge reaction and good cycle performance. The method is simple in process, high in feasibility, low in raw material cost and easy to realize industrial production through a solution system.

The invention provides a low-temperature fast-fired ceramic green body, a high-strength ceramic tile and a preparation method of the high-strength ceramic tile. The ceramic green body is prepared from the following raw materials in parts by weight: 8-15 parts of ball clay, 1-8 parts of bentonite, 1-8 parts of black talc, 60-70 parts of vanadium-titanium slag, 8-15 parts of kaolin and 0.3-0.5 part of a green body dispergator. According to the invention, a large amount of vanadium-titanium slag is introduced into a ceramic blank formula, so that barren raw materials in the blank can be completely replaced, exhaustion of mineral resources is slowed down, the utilization rate of the vanadium-titanium slag is greatly improved, resource waste is avoided, and a low-aluminum blank formula system enhanced by metal oxide is formed; the sintering temperature of the green body can be greatly reduced, the water absorption rate of the product is reduced, the sintering period is shortened, and a low-temperature fast-firing ceramic production process is realized.

The invention discloses a modified maleimide prepolymer, a resin composition and application thereof, the modified maleimide prepolymer is an amine compound modified maleimide prepolymer and is generated by a prepolymerization reaction of maleimide resin and an amine compound, and the weight ratio of the maleimide resin to the amine compound is 100: (1-120); according to the invention, the maleimide resin is modified by a compound containing a special aliphatic ring and aromatic amine structure, and due to the existence of the aliphatic ring or olefin structure, the dielectric property, the water absorption rate and the like of bismaleimide can be reduced; the structure has an excellent thermal expansion coefficient and can meet the requirement of high-order packaging; according to the present invention, the product has characteristics of high temperature resistance, no volatile low molecular substance generation during the reaction process, stable molecular structure and high thermal decomposition temperature, can completely meet the multi-chip assembly manufacturing process requirements in the large-scale integrated circuit, and can obtain the cured product with characteristics of high heat resistance, high toughness, low CTE, low dielectric property and low water absorption rate, and the obtained cured product has characteristics of high heat resistance, high toughness, low CTE, low dielectric property and low water absorption.

The invention provides a polymer, a preparation method thereof, a positive pole piece, a secondary battery and an electric device. The polymer comprises a structure as shown in a formula I, X comprises a phosphate group or a phosphite group, R1 and R3 respectively and independently comprise at least one of a polyether chain segment, a polyester chain segment, hydrogen and alkyl, and at least one of R1 and R3 comprises the polyether chain segment or the polyester chain segment; and R2 comprises an organic chain segment. According to the polymer provided by the invention, the flexibility of a pole piece can be improved while the maximum solid content of positive electrode slurry is effectively improved, the filtering time is shortened and the production efficiency and quality of the pole piece are improved.

The invention relates to the field of sprayed concrete, in particular to green low-carbon high-performance sprayed concrete using active regenerated micro powder and a preparation method and a construction process of the green low-carbon high-performance sprayed concrete. The sprayed concrete is prepared from the following components in parts by weight: 300 to 350 parts of cement, 50 to 80 parts of active regenerated micro powder, 60 to 120 parts of early strength type mineral admixture, 20 to 40 parts of rubber powder, 10 to 20 parts of hydrophobic compacting agent, 700 to 800 parts of coarse aggregate and 800 to 900 parts of fine aggregate, the mixing amount of the water reducing agent is 0.8%-1.2% of the mass of the cementing material, and the mixing amount of the fluoride-free alkali-free accelerator is 6%-9% of the mass of the cementing material; wherein the active regenerated micro powder is composed of multi-component isomeric alcohol amine and regenerated micro powder, and the dosage of the multi-component isomeric alcohol amine is 0.1%-0.5% of the mass of the cementing material. The cement consumption of the sprayed concrete can be reduced, and the requirement for high performance of the sprayed concrete is met.

The invention provides a superfine light-weight high-strength filler and a preparation method thereof, and belongs to the technical field of fillers. The filler is prepared from the following components in parts by weight: 30 to 100 parts of quartz sand, 1 to 10 parts of cullet, 1 to 15 parts of Al2O3, 7 to 15 parts of Li2O, 2 to 8 parts of P2O5, 1 to 12 parts of ZrO2, 3 to 6 parts of composite nucleating agent, 5 to 10 parts of carbonate, 10 to 20 parts of feldspar and 2 to 5 parts of sulfate. The preparation method comprises the following steps: mixing the quartz sand, the cullet, the Al2O3, the Li2O, the P2O5, the ZrO2 and the composite nucleating agent, melting at a high temperature to obtain a base material, nucleating and crystallizing at different temperatures, grinding, adding the carbonate, the feldspar and the sulfate, adding the binder, granulating, and sintering to obtain the product. The lightweight high-strength filler has the characteristics of sound absorption, noise reduction, fire prevention, flame retardance, light mass density, high compressive strength, low water absorption, ecological environmental protection and the like, and is suitable for lime, gypsum and cement-based products; particularly, the high-temperature-resistant and high-strength dry-mixed mortar has a good application prospect in dry-mixed mortar products, such as ceramic tile adhesives, light plastering and self-leveling, as well as acoustic boards, sound insulation barriers, heat insulation boards and fireproof board products.

The invention discloses a multilayer polyimide film as well as a preparation method and application thereof, belongs to the technical field of high-performance polyimide, and solves the problem that the thermal stability is not ideal when a PI film is applied to a flexible PI plate in the prior art. The method comprises the following steps: mixing ODA, GAPD and DMAc in an ice bath, mixing BPDA and TAHQ, and adding the mixture in batches to obtain a solution B; adding SiO2 aerogel into absolute ethyl alcohol, and carrying out ultrasonic treatment at room temperature to obtain a solution C; coating the solution B into a film shape, drying, coating the solution C on the film, drying, coating the solution B on the film again, and drying to obtain the polyimide film. The multilayer low-dielectric polyimide film prepared by the invention has the advantages of low dielectric, high temperature resistance, high interface compatibility and low water absorption.

The invention belongs to the technical field of resource recycling, and discloses lead-zinc tailing ceramsite and a preparation method thereof. The lead-zinc tailing ceramsite is mainly prepared from the following raw materials in parts by mass: 100 parts of lead-zinc tailings; 20 to 30 parts of limestone tailings; 6-8 parts of active mullite nano powder; 1-3 parts of glass micro powder; and 8-12 parts of dry sludge powder. The invention also provides a preparation method of the lead-zinc tailing ceramsite. The lead-zinc tailings are used as main raw materials to prepare the lead-zinc tailings ceramsite, through compounding of the lead-zinc tailings and the limestone tailings, the synergistic effect of the lead-zinc tailings and the limestone tailings is achieved, resource utilization of the lead-zinc tailings and the limestone tailings is achieved, and good economic benefits and social benefits are achieved. The density grade of the ceramsite prepared by the invention is 600-900, the cylinder compressive strength is 6.8-9.8 MPa, the water absorption rate is 9.4-11.4%, and the ceramsite has relatively good strength and relatively low water absorption rate.

The invention provides a carbonized calcined coal gangue solid waste-based cementing material and a preparation method thereof, and belongs to the technical field of coal gangue solid waste utilization. The carbonized coal gangue-based cementing material is prepared from the following raw materials: 30 to 70 parts of calcined coal gangue micro powder, 20 to 50 parts of premixed concrete waste residue, 10 to 20 parts of cement, 0 to 5 parts of gypsum, 0.5 to 1.0 part of surfactant and 0.1 to 0.5 part of organic amine. The preparation method comprises the following steps: firstly, crushing, grinding and calcining coal gangue solid waste; mixing the mixture with premixed concrete waste residues, ordinary Portland cement, gypsum, a surfactant and organic amine, introducing industrial carbon dioxide, and drying to obtain the cement. The performance index of the carbonized and calcined coal gangue solid waste based cementing material is equivalent to that of PO 42.5-grade cement, large-dosage utilization of the coal gangue solid waste and preparation of the low-carbon cementing material are achieved, the process is simple, and the practical application and popularization value is achieved.

The invention relates to the technical field of degradable flowerpots, in particular to a plant fiber mould pressing flowerpot and a manufacturing method of the plant fiber mould pressing flowerpot. 10 to 20 parts of a composite binder; wherein the plant fiber comprises at least one of straw and wheat straw, and the length of the straw and the wheat straw is 5-10 mm; the composite binder comprises the following components in parts by weight: 60-80 parts of modified urea-formaldehyde resin; 15 to 25 parts of epoxy resin; according to the plant fiber flowerpot, the plant fiber flowerpot with the height of 15 cm or above is successfully manufactured, and the industry blank is filled up; balanced strength distribution from bottom to top is achieved through fiber orientation and gradient density forming. The composite binder system obviously reduces the water absorption rate of the flowerpot and prolongs the service life of the product; the degradation speed is accurately controlled by regulating and controlling the ratio of the plant fibers to the binder.

The invention discloses a foam concrete nano foaming agent and application thereof, and belongs to the technical field of concrete materials. The foam concrete nano foaming agent is composed of the following components in percentage by mass: 10-50% of cellulose; 10%-50% of a water-soluble polymer material; 5%-30% of a surfactant; and 5%-30% of nanoparticles. The foam concrete nano foaming agent provided by the invention has the advantages of low cost and good foaming effect. Nano foam generated by foaming of the foaming agent is high in stability, and when the foaming agent is applied to preparation of a foam concrete material, the foam concrete is wide in dry density range and low in collapse rate, has good mechanical properties, flowing properties, dry shrinkage properties, stability and heat insulation properties, and is wide in application prospect. The method is suitable for the fields of building materials, housing construction, road and bridge engineering, cast-in-place backfill engineering, pit goaf backfill, garbage burying and the like.

The invention discloses a modified allyl benzoxazine resin composition, a layer-adding film as well as a preparation method and application of the layer-adding film, and belongs to the technical field of composite materials. The modified allyl benzoxazine resin composition comprises modified allyl benzoxazine resin, functional resin, a curing agent, a curing accelerator, an inorganic filler and an auxiliary agent, the modified allyl benzoxazine resin is prepared from the following raw materials: a modifier and allyl benzoxazine resin, the modifier comprises a first modifier; the first modifier is an amine fluorine-containing compound; the amine fluorine-containing compound is 2, 2-bis (4-allyloxyphenyl) hexafluoropropane, and the amine fluorine-containing compound is 2, 2-bis (4-allyloxyphenyl) hexafluoropropane. According to the invention, the amine fluorine-containing compound is adopted to modify the allyl benzoxazine resin, so that the modified allyl benzoxazine resin composition with low dielectric constant, low dielectric loss and low water absorption rate can be prepared, and the application requirements of a film increasing layer are met.

The invention relates to the technical field of EVA (Ethylene Vinyl Acetate) hot melt adhesives, and discloses a hot melt adhesive, a preparation method thereof and an application of the hot melt adhesive in a card protecting film. The preparation method comprises the following steps: adding EVA resin, EVA-based polyurethane and an antioxidant into a reaction kettle, heating, stirring and melting, then adding a plasticizer, an auxiliary agent and a tackifier, and cooling to obtain the hot melt adhesive. The EVA-based polyurethane contains an EVA molecular chain, so that the polyurethane and EVA resin have better compatibility, a better toughening effect is achieved, the shear strength and the elongation at break of the hot melt adhesive are improved, the EVA-based polyurethane contains a hydrophobic fluorine-containing alkyl chain, the hydrophobicity of the polyurethane is improved, the hydrophobicity of the hot melt adhesive is improved, and the hot melt adhesive has a good application prospect. The water absorption rate is reduced, and better water resistance is shown. Good practical application is realized in the aspects of card protecting films and the like.

The present invention relates to the technical field of EVA, and discloses a preparation method of a wear-resistant modified EVA foamed sole material, ethylene-vinyl acetate copolymer, POE grafted microcrystalline cellulose, ethylene propylene diene monomer rubber, auxiliary agent, filler, cross-linking agent, foaming agent are placed in an open mill, and molded foaming is carried out in a flat vulcanizer after mixing to obtain a wear-resistant modified EVA foamed sole material. POE can play the role of a compatibilizer, improve the interface compatibility between microcrystalline cellulose and EVA, improve the tensile strength, elongation at break and tear strength of the foamed material, and reduce the relative volume wear amount, improve wear resistance. And reduce water absorption, improve the water resistance and waterproof performance of the foamed sole material.

The invention discloses an anti-sticking nozzle hydrogel coated particle and a preparation method and application thereof, the anti-sticking nozzle hydrogel coated particle comprises hydrogel particles and a coating layer from inside to outside, the mass of the hydrogel particles accounts for 50%-99% of the total mass of the anti-sticking nozzle hydrogel coated particle, and the coating layer accounts for 50%-99% of the total mass of the anti-sticking nozzle hydrogel coated particle. The coating layer accounts for 1%-50% of the total mass of the anti-sticking hydrogel coating particle; the coating layer comprises a film-forming substrate and a plasticizer, the film-forming substrate accounts for 50-100% of the mass of the coating layer, the plasticizer accounts for 0-50% of the mass of the coating layer, and the coating layer of the prepared anti-sticking hydrogel coating particle is insoluble in the oral cavity within a short time. According to the invention, the hydrogel particles are coated by a film coating technology, so that the defects that the hydrogel particles are easy to stick to the mouth when being directly drunk and easy to absorb moisture when being exposed to air for a short time are overcome, the original water swelling performance of the hydrogel particles is not influenced, and the taste of the hydrogel particles is improved.

The invention discloses a nanometer anti-erosion material with alkali response hydrophilic-hydrophobic conversion as well as a preparation method and application of the nanometer anti-erosion material. The alkali-responsive hydrophilic-hydrophobic conversion nano anti-erosion material is prepared from a hydrophobized nano material and an alkali-responsive hydrophilic-hydrophobic conversion polymer material, the hydrophobic nano material is a nano particle with hydrophobicity; the alkali-responsive hydrophilic-hydrophobic conversion polymer is a functional polymer which can respond to change in an alkaline environment, slowly release hydrophobized nanoparticles and simultaneously generate hydrophilic-to-hydrophobic conversion. The alkali-responsive hydrophilic-hydrophobic conversion nano anti-erosion material can be applied to a cement-based material system, including but not limited to maritime work concrete, waterproof mortar, anticorrosive mortar, inorganic artificial stone and other cement-based materials, and the hydrophobicity of pores and pore interfaces of the cement-based materials is changed, so that the corrosion resistance of the cement-based materials is improved, and the corrosion resistance of the cement-based materials is improved. The medium permeation resistance and the corrosion resistance of the cement-based material are improved.

The invention discloses an application of 3, 4, 5-trifluorobromobenzene in an electric storage polymer coating, and the electric storage polymer coating is prepared from hyperbranched polyimide based on 3, 4, 5-trifluorophenyl through a spin coating method. The coating is high in solubility, good in processability and low in water absorption; the hyperbranched polyimide is formed by polymerizing a diamine compound containing 3, 4, 5-trifluorophenyl and polybasic acid anhydride, the hyperbranched polyimide has a triphenylamine structure and trifluorophenyl, tight packing of molecular chains can be improved under the combined action of torsional motion of the triphenylamine structure and the trifluorophenyl, and meanwhile, the electronegativity of F atoms is high, so that the polarity of molecules can be increased, and the hydrophobic performance can be improved.

The invention relates to the technical field of nylon materials, and discloses a low-moisture-absorption nylon composite material and a preparation method thereof. The nylon composite material prepared by the invention is prepared from the following raw materials in parts by weight: 40-50 parts of nylon 66, 35-55 parts of modified nylon 6, 25-35 parts of reinforcing filler, 0.5-2 parts of a lubricant and 0.5-1 part of an antioxidant, the nylon 66 / modified nylon composite material is prepared by taking nylon 66 and modified nylon 6 as substrate materials, adding auxiliaries such as reinforcing filler, mixing, extruding and granulating, the modified nylon 6 is introduced, so that the toughness of the composite material is improved, and the water absorption rate is reduced; due to the introduction of the reinforcing filler, the synergistic effect of halloysite and boron nitride can be utilized, the flame retardant property of the composite material is improved, and the water absorption rate is further reduced.

The present invention discloses a polyurea-ceramic composite coating for the leading edge of a wind turbine blade and a preparation method thereof. The coating comprises aspartic acid ester polyurea and ceramics. The ceramics have good strength and hardness, and can improve the hardness and toughness of the coating as a whole, and improve the overall anti-rainwater erosion performance of the coating. Specifically, the polyaspartic acid ester polyurea is made of polyetheramine, diisocyanate, polyaspartic acid ester resin and isocyanate as raw materials, and the polyetheramine is a hydrophilic monomer, so that the system has good hydrophilicity, which is conducive to forming a water film on the leading edge surface of the wind turbine blade, and effectively buffering the impact of raindrops on the leading edge of the wind turbine blade.

The invention relates to the technical field of heat insulation materials, in particular to a ceramic aerogel coating and a preparation method thereof.The ceramic aerogel coating comprises a ceramic anti-corrosion bottom layer, a middle coating and a transparent surface layer, and the preparation method of the ceramic aerogel coating comprises the steps that firstly, sand blasting treatment is conducted on a metal base material; step II, spraying a ceramic anti-corrosion primer, and drying; iII, preparing a floating coat base material; iV, spraying a floating coat base material, and sealing and baking; v, spraying a floating coat fabric, and sealing and baking; step VI, polishing the coating; step VII, spraying transparent finish paint after polishing, and sealing and drying; and step VIII, after unified inspection is completed, finish paint is sprayed, sealing baking is conducted for thorough drying, and then the ceramic aerogel coating is obtained, the prepared ceramic aerogel coating is good in adhesiveness, excellent in acid and alkali resistance, not prone to cracking and peeling, capable of protecting metal for a long time, low in heat conductivity coefficient and high in hardness, and the problems that an existing aerogel coating is high in brittleness, weather resistance and hardness and not prone to cracking and peeling are solved. And the mechanical performance is low.

The invention discloses a polyphenyl sulfone resin and a preparation method thereof, and relates to the field of high-temperature-resistant high polymer materials. According to the method, a feeding mode of firstly adding a solvent and then adding a monomer is adopted, meanwhile, an external circulation pipeline is additionally arranged on equipment, so that secondary decomposition of the monomer is reduced, mixing of raw materials and intermediate products in the reaction process is further increased, the reaction rate is increased, and in a GPC chromatographic curve obtained through gel permeation chromatography testing, the synthesized polyphenyl sulfone is lg (Mw1) gt; 5.3 and 1g (Mw2) 1t; the sum of the percentages of 3.6 and 3.6 accounts for less than 1.2% of the total percentage, and the obtained polyphenyl sulfone has excellent dimensional stability.

The invention relates to alkali-activated foam concrete and a preparation method thereof. The alkali-activated foam concrete comprises the following raw materials in parts by weight: 55-65 parts by weight of slag powder, 25-35 parts by weight of fly ash, 25-35 parts by weight of waste concrete powder, 57-67 parts by weight of a multi-element alkali activator, 6-8 parts by weight of a retarder, 5-7 parts by weight of foam and 22-26 parts by weight of water. According to the invention, industrial waste slag powder, fly ash and waste concrete powder are used as cementing materials, the source is green, the cost is low, the concept of low carbon and environmental protection of building material design is met, and the cyclic utilization of industrial waste is facilitated. The main crystalline components in the waste concrete powder are dicalcium silicate and calcium oxide, the hydration reaction of dicalcium silicate is slow, the hydration heat is small, the mold entering temperature of the foam concrete can be reduced, shrinkage cracks of the foam concrete can be reduced, and the water resistance and the long-term compressive strength after 28 days of the foam concrete can be improved.

The invention relates to a regeneration method of waste concrete and a regenerated building material, and relates to the technical field of building materials.The regeneration method of the waste concrete comprises the following steps that the waste concrete is crushed and screened, and waste concrete particles are obtained; adding the waste concrete particles, a silane coupling agent and ionic liquid into a polyethylene glycol aqueous solution, and stirring and mixing to obtain a first mixture; and alternately and circularly treating the first mixture in an ultrasonic field and a pulsed electric field, and the like. Through an innovative waste concrete regeneration mode of combined treatment of physical modification and chemical modification, not only is the water absorption rate of the obtained recycled aggregate reduced, but also the activity of the obtained recycled aggregate is improved. The modified coconut shell powder and other components are subsequently matched for use, so that the compressive strength, cracking resistance and other comprehensive mechanical properties of the regenerated building material are remarkably improved, and the regenerated building material can meet the use requirements in low-temperature and other severe working environments.

The invention relates to a preparation method and application of pore channel hydrophobic modified activated carbon, the preparation method adopts organosilane as a modifier, granular activated carbon is modified into pore channel hydrophobic modified activated carbon by a soaking method, the preparation conditions are green, efficient and mild, and the pore channel hydrophobic modified activated carbon cannot be crosslinked to block pores in the high-temperature modification process; the internal developed pore structure of the pore channel hydrophobic modified activated carbon is subjected to sufficient hydrophobic modification, and the water absorption rate of the granular activated carbon is greatly reduced, so that the adsorption rate of organic pollutants in high-humidity waste gas is remarkably improved; the use efficiency of the granular activated carbon is obviously improved in the working condition of practical application; the porous hydrophobic modified activated carbon prepared by the preparation method is applied to high-humidity organic waste gas treatment.

The invention provides a special recombinant material applied to the fields of liquefied petroleum gas (LPG), liquefied ethylene gas (LEG), liquefied natural gas (LNG) A / B / C type independent liquid cargo tanks and part of low-temperature pipeline supports and a manufacturing method of the special recombinant material. The invention provides a manufacturing method of a special recombined material for the ultralow-temperature field. The manufacturing method comprises the steps of selection of a veneer tree species and an adhesive, determination of the thickness of a veneer and the adhesive applying amount, and rapid gum dipping and hot pressing of a thick veneer. According to the manufacturing method provided by the invention, the vacuum high-pressure impregnation adhesive is adopted, so that the effects of high impregnation efficiency, large impregnation amount and uniform resin distribution can be realized; and a temperature sensor and a pressure sensor are installed, so that early warning can be carried out in advance when abnormity occurs. The special recombinant material has excellent mechanical properties such as water resistance, compression resistance, bending resistance and shearing resistance at room temperature and ultralow temperature (-163 DEG C). The special recombinant material provided by the invention can be used for liquid cargo hold pressure-bearing wood of LPG, LEG and LNG ships and part of low-temperature pipeline brackets.

The invention provides an anti-erosion aluminum oxide-silicon carbide refractory material for a hydrogen-based furnace and a preparation method of the refractory material. The refractory material comprises the following raw materials in parts by mass: 30-40 parts of coarse silicon carbide powder with the particle size of 3-1mm; 20-30 parts of fused white corundum with a particle size of less than 1-0 mm; 3-10 parts of kyanite with a particle size of less than 0-0.2 mm; 10-20 parts of fine silicon carbide powder with the particle size lower than 0.074 mm; 5-10 parts of alumina micro powder with a particle size of less than 3 [mu] m; 1-5 parts of graphite with a particle size of less than 5 [mu] m; 1-5 parts of white mud with a particle size of less than 0.088 mm; 1-10 parts of solid aluminum dihydrogen phosphate; and 1-2 parts of sodium hexametaphosphate. The alumina-silicon carbide refractory material has the characteristics of low expansion coefficient, high-temperature compression resistance, high breaking strength, good thermal stability, stable chemical performance, wear resistance, H2 and CO erosion resistance and the like.

The invention discloses a polyimide / polydimethylsiloxane super-hydrophobic composite coating and a preparation method thereof.The preparation method comprises the steps that firstly, under nitrogen protection, diamine monomers and polydimethylsiloxane are dissolved in an organic solvent, then dianhydride monomers are added in batches, stirring reaction is conducted, and a polyimide / polydimethylsiloxane prepolymer is prepared; adding an organic dispersion liquid of modified GO into the polyimide / polydimethylsiloxane prepolymer to prepare composite bottom layer slurry, coating the surface of a base material with the composite bottom layer slurry, and performing programmed thermal imidization treatment to prepare a composite bottom layer; and coating the surface of the composite bottom layer with a suspension of an adhesive and fluorinated modified SiO2, and curing at room temperature to obtain the polyimide / polydimethylsiloxane super-hydrophobic composite coating. The composite coating has good long-acting corrosion resistance.