76results about How to "Solve water absorption" patented technology

The invention discloses a halogen-free resin composition which is prepared from the following components in parts by weight: 15 to 30 parts of epoxy resin with a large epoxy equivalent, 20 to 55 parts of epoxy resin with a small epoxy equivalent, 10 to 45 parts of a curing agent, and 0.03 to 2.0 parts of a curing accelerant, wherein the equivalent of the epoxy resin with the large epoxy equivalent is 300 to 800g/eq, and the equivalent of the epoxy resin with the small epoxy equivalent is 170 to 280g/eq; the degree of functionality of the epoxy resin is 2 to 4. The effect of improving the heat resistance and the wet resistance of a copper foil layer-covered pressing plate prepared by the composition disclosed by the invention is outstanding; the problems that a copper foil layer-covered pressing plate CEM-1 is easy to crack and layer under a high-temperature condition and easily absorbs water under a wet condition are solved; the reliability of the CEM-1 under the wet and hot environments is enhanced; furthermore, the halogen-free resin composition is halogen-free and environment-friendly.

An insulating system for external wall and its construction technology are disclosed. The system features that unique cement mate, insulating adhesive, alkali-resistant glass reinforced grid, special cutting tools, grinding tools and toothed plastering tool are used. Its advantages are high quality, short construction period, low cost and saving energy by more than 50%.

The invention discloses a method for preparing a super-strong water-absorbing water-retaining agent, which comprises the following steps of: gelatinizing or dispersing a biomass base material which is easy to degrade to form a mixture of the gelatinized or dispersed biomass base material and an unsaturated graft monomer, regulating the pH value to be between 3 and 9, and adding a cross-linking agent; and adding an active material with bacteriostatic and antibacterial activity to initiate polymerization so as to prepare the super-strong water-absorbing water-retaining agent which has bacteriostatic and antibacterial effects and is easy to degrade. The super-strong water-absorbing water-retaining agent which is prepared from the biomass base material such as starch, cellulose, polysaccharide, protein and the like and is easy to degrade has high bacteriostatic and antibacterial characteristics, the problems of poor mildew prevention, water absorption and retention functions and persistent characteristics and the like of the super-strong water-absorbing water-retaining agent product are solved, the preparation process is simplified, reaction time is shortened, production cost is greatly reduced through water and energy conservation, and waste liquid is not generated in the process.

The invention relates to dry-mixed composite light aggregate concrete based on inorganically modified polyurethane particles and a preparation method of the dry-mixed composite light aggregate concrete. The concrete is prepared from raw materials in parts by weight as follows: 38-135 parts of the inorganically modified polyurethane particles, 162-485 parts of cement, 30-127 parts of fly ash, 23-50parts of mineral powder, 3-50 parts of silica fume, 37-740 parts of dry sand, 4.6-19.7 parts of an admixture and 105-380 parts of water. The preparation method comprises the following steps: 1, wastepolyurethane particles are subjected to grain size grading; 2, the graded waste polyurethane particles are inorganically modified; 3, the cement, the fly ash, the silica fume, the mineral powder andthe admixture are added to a dry powder stirrer for uniform stirring and mixing, and dry-mixed composite powder is obtained; 4, the dry-mixed composite powder is mixed with the inorganically modifiedpolyurethane particles, water is added for stirring, and the dry-mixed composite light aggregate concrete is prepared.

The invention discloses a method and a device for rapidly extracting saturation pore water from a cement-based material. The method comprises the following steps of: smashing the cement-based material into particles, soaking the particles by water, placing in a vacuum apparatus and carrying out continuous vacuum pumping treatment for 12 hours to 16 hours, and stopping vacuum pumping treatment until no bubbles are generated; filtering the water on the surfaces of the particles, rapidly filling the filtered particles in a hole solution extractor, placing on a universal testing machine pressing plate, pressurizing, and then squeezing out the pore water in the particles. The device is composed of an outer cylinder (1), a pinhole filter screen (2), a macropore inner cylinder (3) and a force transferring cylinder (4). The solution extracted by the device provided by the invention is a pore solution under saturation state flowing out when the particles are squeezed, other substances are not introduced, and composition or concentration of the pore solution is also not changed, so that the actual situation of void water is truly reflected; the device has double filtering effects, the extracted void water does not contain broken particles or impurities, and test foundation is provided for relevant analysis of void water of cement-based materials.

The invention discloses a core-shell structure silt solidification unsintered ceramisite and a preparation method thereof. The core-shell structure silt solidification unsintered ceramisite is composed of a core material and a shell material, wherein the core material is compose of, by weight percentage, 13.00-13.49% of phosphate, 11.46-12.27% of overburnt magnesium oxide, 3.07-5.52% of coal ash,3.05-3.68% of silica fume, 33.12-32.51% of dried silt, 0.012-0.025% of light particles, 3.052-3.078% of borax, 1.22-1.23% of naphthalene water reducer and 29.44-30.67% of water; the shell material iscomposed of, by weight percentage, 44.90-48.79% of ordinary Portland cement, 5.10-9.04% of silica fume, 0.51-0.60% of sodium carbonate, 0.51-0.60% of sodium sulfate, 0.005-0.006% of HPMC (hydroxy propyl methyl cellulose), 1.015-3.624% of acrylic emulsion, 1.02-1.20% of naphthalene water reducer and 36.14-45.92% of water. The core-shell structure silt solidification unsintered ceramisite is prepared through core material balling, shell material coating and heating curing. Meanwhile, the core-shell structure silt solidification unsintered ceramisite is green, energy-efficient, low in water absorbency, good in degree of sphericity and simple in process and avoids the shortcomings of high energy consumption and emission of sintered ceramisites and high manufacturing prices and maintenance costof a rotary kiln.

The invention discloses a composite binder for a high-nickel ternary material. The composite binder comprises 20-35 weight percent of suspending polymerized PVDF and 65-80 weight percent of emulsion-polymerized PVDF. The invention further discloses a preparation method of the composite binder for the high-nickel ternary material. The invention further discloses a positive electrode paste containing the composite binder for the high-nickel ternary material and a corresponding preparation method. Through adoption of the composite binder for the high-nickel ternary material, the positive electrode paste, and the preparation methods thereof, defects that NCA particles have a wide particle size distribution range and are easy to absorb water are overcome, bad effects caused by water absorption of the oxidized NCA material are minimized, the overall performance of the positive electrode piece finally obtained is improved substantially, products of the cell manufacture enjoy a brighter market application prospect, the cell can be manufactured extensively, and production and practice significance is delivered.

The invention discloses a nylon /silica composite microsphere, a preparation method and an application thereof. The composite microsphere is spherical and/or near spherical particles with the particle size of 0.5-300 [mu]m, and is formed by an aperture-containing nylon microsphere matrix and silica uniformly dispersed in the aperture-containing nylon microsphere aperture and/or surface. The content of the aperture-containing nylon microsphere is 10-99.9 wt%, and the content of the silica is 0.1-90 wt%. The composite microsphere is obtained by performing silica in-situ hydrolysation in aperture-containing nylon microsphere dispersion liquid. Addition of silica can effectively reduce the water absorption of the aperture-containing nylon microsphere, and increases the heat stability, crystallization property and mechanical intensity; the composite microsphere can be taken as consumable in a SLS selective laser sintering technology, and widens the application of the SLS technology in the fields of aviation, automobile, medical apparatus, electronic apparatus, machinery die and artwork.

The invention relates to light ceramsite prepared from oil shale semi-coke and a preparation method thereof. The light ceramsite consists of the raw materials such as oil shale semi-coke, oil shale ash, clay and water glass. The preparation method comprises the process steps such as pulverization, pelletizing, sintering and cooling. The light ceramsite provided by the invention has the advantages of widely available raw materials, easiness in preparation, low production cost, environmental friendliness and the like; by implementing the technical scheme, much land occupation caused by stacking oil shale semi-coke and ash can be reduced, consequent severe threat to the ecology, environment and human health is relieved, the problems such as low capacity value, low water absorption and low cylinder compressive strength of the commercially available ceramsite products are solved, and the use value of the oil shale semi-coke is increased so that the oil shale semi-coke is turned into wealth; and the light ceramsite is suitable for industrial production.

The invention discloses ultraviolet cured resin coated modified bamboo fiber and a preparation method thereof. The modified bamboo fiber is ultraviolet cured resin coated modified bamboo fiber which comprises the following components in parts by mass: 100 parts of bamboo fiber and 5-20 parts of an ultraviolet curing composition. The preparation method comprises the following steps: cutting, steeping and performing ultraviolet curing. According to the technical scheme, the surface of the ultraviolet cured resin coated modified bamboo fiber can be completely coated by resin, so that the difficulty that the application range is affected as water and moisture can be easily absorbed into the bamboo fiber is solved. The ultraviolet curing composition for coating the bamboo fiber is good in flowability, can sufficiently infiltrate grooves of bamboo fiber and form a layer of complete protecting film on the surface of the bamboo fiber. Therefore, contact of the resin coated bamboo fiber with moisture in air is reduced, the water absorption property is greatly degraded, and meanwhile other mechanical properties are also greatly improved.

The invention relates to a heat insulating material used for an aqueduct and a preparation method thereof. The heat insulating material used for the aqueduct is characterized in that the material is made by mixing and stirring dry mixture and water, the mass ratio of the water to the dry mixture is between 1.1:1 and 1.2:1; the dry mixture consists of cement, vitrified hollow beads, sepiolite fiber, siliceous dust, cement-based capillary crystalline material, waste rubber powder, re-dispersible emulsion powder and hydroxypropyl methyl cellulose; and the mass percentage of the raw materials of the dry mixture are: 35 to 54.9 percent of the cement, 35 to 54.9 percent of the vitrified hollow beads, 2 to 8 percent of the sepiolite fiber, 3 to 6 percent of the siliceous dust, 1 to 4 percent of the cement-based capillary crystalline material, 3 to 6 percent of the waste rubber powder, 1 to 5 percent of the re-dispersible emulsion powder and 0.1 to 0.5 percent of the hydroxypropyl methyl cellulose. The heat insulating material has the characteristics of low water absorbing rate, high cohesional strength and compressive strength, good anti-cracking ability and good stability.

The invention relates to a graphene polyurethane sponge and an application thereof. The graphene polyurethane sponge is prepared from a composition comprising polyether polyol, an amine-based catalyst, a tin-based catalyst, a foam stabilizer, water, a graphene dispersion, a carbonyl iron powder dispersion and an isocyanate. The graphene polyurethane sponge is a superhydrophobic sponge, and has a high mechanical strength and a large specific surface area, so multiple scattering of electromagnetic waves inside the sponge is highly benefited, thereby the loss of electromagnetic waves is reduced,and the total reflectivity of electromagnetic waves is reduced.

The invention discloses an aerogel composite modified fire retardant and its preparation method and application. The aerogel composite fire retardant is formed by composite processing of silica aerogel particles, ammonium biphosphate, diammonium phosphate, sodium dodecanesulphonate and urea which are used as raw materials. The hydrophobic silica aerogel particle composite modified fire retardant provided by the invention has excellent fire resistance, heat preservation and insulation performance, sound insulation performance and light weight. Thus, problems of high heat conduction, heavy weight, high water absorption and the like of a traditional fire retardant are solved. The fire retardant provided by the invention can be used for fire protection and modification of building materials and in the fields of various cloth materials, plywood and the like. By the use of the product provided by the invention, safe and reliable fireproof guarantee can be provided for high-rise buildings, public amenities, hotels, residential buildings and the like.

The invention relates to the field of building materials, in particular to a wall space repairing material and a preparation method thereof. The wall space repairing material can be used for repairingloess cave dwellings and is prepared from, by weight, 360-540 parts of sticky rice pulp, 100-150 parts of silica fume, 100-200 parts of quick lime, 200-300 parts of semi-hydrated gypsum, 500-600 parts of cave dwelling raw sample loess for repairing, 1-4 parts of a fiber material and 10-18 parts of a water reducing agent. A bridging structure formed by filling gaps among loess granules enables theloess granules to be connected, the internal gluing is enhanced, the problems of internal gap structure and possible erosion of natural loess are solved, thus the characteristics of strong water absorption of the loess and loess collapse with water are improved, and the freeze thawing resistance, weather resistance and drying and wetting cycle resistance capability of cave dwellings are improved.

The invention discloses a lightweight and high-strength ceramsite prepared by taking slate as a raw material, and a preparation method thereof, and relates to the technical field of preparation of building materials. The lightweight and high-strength ceramsite is prepared from the raw materials by mass percent: 50% -90% of slate, 5% -30% of fly ash, 2% -6% of metal magnesium slag, 1% -10% of oil shale semicoke and 1% -4% of dolomite. The fly ash added into the lightweight and high-strength ceramsite taking slate as the raw material can reduce SiOs as well as increase the Al2O3 content; the occupation on a large amount of land by the slate tailings piling can be reduced, thereby relieving the serious threat on the ecology, the environment and the human health, and further solving the problem that the ceramsite product on the former market is high in piling density, high in water absorption and low in cylinder pressure strength; a value in use of the slate taiings, the metal magnesium slag, the oil shale semicoke and flyash are improved, the solid wastes are changed into valuables, and the lightweight and high-strength ceramsite is suitable for the industrial production.

The invention provides a modified regenerated cellulose membrane and a preparation method and application thereof and relates to a regenerated cellulose membrane. The modified regenerated cellulose membrane is prepared from 80%-99.9% of cellulose and 0.1%-20% of polyacrylamide. The preparation method comprises the steps that 1, the cellulose is dissolved to obtain a cellulose solution, a solution layer is formed on a substrate through tape casting after defoaming, washing is performed after solidification, and the regenerated cellulose membrane is obtained; 2, the regenerated cellulose membrane is soaked in an acrylamide solution, an initiator is added to initiate polymerization so as to form a polyacrylamide and cellulose membrane grafted membrane; 3, another part of regenerated cellulose membrane obtained in the step 1 is soaked in the acrylamide solution, the initiator is added to initiate polymerization so as to form a polyacrylamide and regenerated cellulose gel membrane interpenetrated network structure membrane; 4, the membrane prepared in the step 2 and the membrane prepared in the step 3 are washed and dried to obtain the modified regenerated cellulose membrane. The modified regenerated cellulose membrane can serve as a water-absorbing drying membrane and is applied to the fields of cosmetic package, food package, industrial wastewater treatment and the like.

The invention discloses a preparation method of cellophane and belongs to the field of cellophane. Sodium oleate is taken as a main material, a biopolymer anionic surfactant, which is a polymer fattyacid trapping agent, is synthesized through aqueous solution free radical polymerization and is mainly used for electrostatic adsorption of printing ink particles containing anion groups and anions inthe polymer in bivalent calcium ions, formed calcium bridges can gather printing ink particles and remove the particles through flotation to play the role in trapping the printing ink particles, theprinting ink removal rate is high, meanwhile, the agent has the capacity of emulsification, permeability, high fouling removal performance and low surface tension and can remove a large amount of waste paper printing ink, and the utilization rate of recycled paper is improved. The defects that existing cellophane can be torn easily and softened after absorbing water are overcome, and the problemsthat the cellophane consumes a large quantity of waste paper, a large amount of printing ink in the paper is difficult to remove, and most of existing cellophane has the problems of poorer damp-proof,water-proof and mold-proof performance are solved.

The invention discloses a method for producing a Shanxi mature vinegar powder through cooperation of microcapsule molecular embedding and spray drying. The method comprises the following steps: (1) pre-proportioning; (2) preheating sterilization; (3) post-proportioning; (4) standardization; (5) spray drying; (6) fluidized bed cooling sieving; and (7) packaging. According to the process disclosed by the invention, Shanxi mature vinegar is taken as a raw material and mixed with concentrated haw juice and concentrated hippophae juice into a proportioning solution, the proportioning solution is sterilized, then beta-cyclodextrine and maltodextrin are added, the microcapsule molecular embedding is carried out, then the proportioning solution is scientifically compounded with a composite spice powder and a composite yeast extract, and powder spray is carried out to prepare the Shanxi mature vinegar powder. The product reserves the nutritional ingredients of the Shanxi mature vinegar, improves the flavour thereof and enriches the taste.

The invention provides a COFs-modified ammonium polyphosphate flame retardant, a preparation method and application thereof and flame-retardant epoxy resin. The flame retardant is of a core-shell structure with ammonium polyphosphate as a core and a COFs material as a shell, the water contact angle of the flame retardant is larger than 95 degrees, the specific surface area is larger than 5 m<2>/g, and the average pore size is smaller than 6.07 nm. Ammonium polyphosphate, p-phenylenediamine, 1,3,5-tri(4-aminophenyl)benzene and 1,3,5-tri(4-aminophenyl)benzene are used as raw materials, and a one-step method is adopted for synthesis. The flame-retardant epoxy resin is prepared by adding a COFs-modified ammonium polyphosphate flame retardant into epoxy resin. The preparation method is simple to operate and mild in condition, the obtained flame retardant has relatively high hydrophobicity and flame retardance, and a feasible treatment method is provided for the flame retardant with poor stability. The prepared flame retardant is added into the epoxy resin, so that the flame retardant effect of the obtained epoxy resin can be greatly improved, and the flame retardant has a wide industrial application prospect.

The invention belongs to the technical field of wood bamboo material surface coating modification, and discloses a wood bamboo material with a super-hydrophobic mildew-proof anticorrosive coating anda preparation method thereof. The wood bamboo material is prepared by performing air-drying on the wood bamboo material until the moisture content is 8 to 14 percent; in a stirring state, titrating amethyl silicate solution to the pH of 8 to 12 by using a copper-containing solution; continuously stirring to obtain a super-hydrophobic mildew-proof anticorrosive suspension after the titrating is stopped; in the stirring state, impregnating the air-dried wood bamboo material in the super-hydrophobic mildew-proof anticorrosive suspension, and drying the wood bamboo material at 60 to 160 DEG C. The wood bamboo material has the advantages of super-hydrophobicity, proofing mildew and preventing corrosion; moreover, the raw materials are cheap and easily obtained. According to the preparation method, the problems of water absorption and mildew in the storage and transportation processes of the wood bamboo material and other fibre-based materials; the size stability of a wood bamboo product iseffectively maintained; the erosion degree of microorganisms is reduced, so that the application range of the wood bamboo material and other fibre-based materials is expanded, the service life is prolonged, and the application prospect is great.

The invention discloses a method for preparing a building insulation material employing straws and bamboo poles, and belongs to the field of building insulation materials. The agricultural wastes straws and bamboo poles are utilized to the maximal extent; and the building insulation material has heat preservation and insulation properties, fireproof and flame-retardant properties and antiseptic and mildew-proof effects, and can be applied to the requirements of urbanization and new rural construction. The mechanical strength is improved by virtue of the bamboo poles; the breaking strength is improved; in addition, the heat conductivity coefficient can be effectively reduced; the bamboo is a hollow material has relatively small heat conductivity coefficient, and the straws and the bamboo poles are compounded together, so that the heat conductivity coefficient of a building material product is reduced. The problems of interface characteristics, corrosion prevention and water absorption of the straws and the bamboo poles are solved by a silane coupling agent and an acrylic resin emulsion; and an inorganic cementing material and the combining capacity thereof are improved by the coated isolation effect. Through technological innovation and innovation of a preparation method, the straw-bamboo pole-inorganic composite building insulation material with excellent performance is prepared; the volume usage of the straws in the building material can reach 50%-80%; and full utilization of the straws is realized.

The invention provides a preparation method of a solid wood fiber/SiO2 aerogel composite thermal insulation material. The preparation method comprises the following steps: 1, immersing balsa wood in amixed solution of NaOH and NaSO3, boiling the liquid, moving out the balsa wood, washing the balsa wood with distilled water, adding H2O2, boiling the liquid, moving out the balsa wood, washing the balsa wood with distilled water to obtain a wood fiber substrate; 2, by means of tetraethoxysilane and methyltrimethoxysilane as a mixed silicon source and absolute ethyl alcohol as a solvent, uniformly mixing the components with water and the wood fiber substrate, adding hydrochloric acid until the pH value is 2-3, fully hydrolyzing the fiber substrate, adding ammonia water until the pH value is 8-9, performing standing treatment to form gel, and performing aging, surface modification, solvent exchange and normal pressure drying on the gel to obtain the solid wood fiber/SiO2 aerogel compositethermal insulation material. According to the method provided by the invention, the excellent properties of the balsa wood and the SiO2 aerogel are combined, so that the integrity of the SiO2 aerogelis improved, the problems that the fir absorbs water easily and the utilization rate is low are solved, and meanwhile, the heat preservation property of the balsa wood is improved. The preparation equipment is simple, convenient and low in cost, and has a good development prospect and further in-depth development and research value.

The invention discloses a colorful non-woven fabric tissue, which is prepared from the following raw materials in parts by weight: 75-92% of bamboo pulp fibers, 5-20% of polylactic acid fibers and 3-5% of natural dyed ultra-strong antibacterial fibers. The invention also discloses a preparation method for the colorful non-woven fabric tissue. The preparation method comprises the following steps of: (1) selecting a fiber category; (2) manufacturing into a colorful spunlace non-woven fabric; and (3) packaging the tissue. By use of the colorful non-woven fabric tissue and the preparation method thereof, three categories of antibacterial fibers are optimized to carry out performance superposition, the fibers are specially mixed to prepare the colorful non-woven fabric, on the basis of own natural antibacterial functions of each category of fiber, the non-woven fabric does not need to receive any antibacterial finishing post-processing, and therefore, the non-woven fabric tissue simultaneously has excellent antibacterial and anti-virus performance, an excellent water absorption function, an excellent skin care function, excellent environmentally-friendly performance and good use safetyperformance.

The invention discloses a fire prevention and extinguishing gel material for a mine and a preparation method thereof. The material is formed by mixing a solid mixture and water according to the water-solid ratio of (6-16): 1, wherein the solid mixture is prepared from the following components in parts by weight: 11 to 14 parts of solid water glass, 6 to 8 parts of a coagulant, 12 to 16 parts of fly ash, 10 to 14 parts of an activating agent, 4 to 8 parts of aluminum-magnesium silicate and 40 to 60 parts of sodium bentonite; the modulus of the solid water glass is 2.0 to 2.5; the water-solid ratio is adjusted and the water is added into the solid mixture, so that fire prevention and extinguishing gel with strong water-retaining property, high mechanical strength and adjustable gel forming time is provided; and the gel forming time of the gel can be relatively conveniently adjusted and the wide-ratio requirements of short-distance filling and long-distance conveying are met. The fire prevention and extinguishing gel has a physical moisture-keeping effect and can be used for locking the water injected into coal bodies relatively well; meanwhile, gaps between the coal bodies can be filled and coal-oxygen contact is reduced, so that the combustion of coal is inhibited relatively well.

The invention discloses a high titanium slag self-compacting concrete production method, relates to the field of reuse of high titanium slag, and provides a production method of self-compacting concrete by adopting high titanium slag as an ingredient. The method comprises the following steps: 1, preparing the following concrete ingredients: high titanium slag fine sands, high titanium slag broken stones, cement, fly ash, an additive and water; and 2, determining the amounts of the ingredients, wherein the amount of the high titanium slag broken stones is determined according to the grade of the self compacting performance of concrete; the amount of water is determined according to a formula of V<w> = V<W1> + V<W2> - V<W3>; the amount of cement and fly ash is determined according to a ratio of the mass of water to the total mass of cement and fly ash and the admixture of the fly ash of 25-35%; the amount of the additive is determined according to test of the compatibility between the additive and cement; and the amount of the high titanium slag fine sands is obtained through determining the unit weight of concrete according to common high titanium slag concrete preparation experiences and subtracting the weight of the high titanium broken stones, cement, fly ash, the additive and water from the total unit weight. The method can be applied to concrete production.

The invention belongs to the technical field of building materials, and discloses recycled aggregate reinforced slurry and a preparation method thereof, and the recycled aggregate reinforced slurry comprises the following components by mass: 5-12% of caustic-burned magnesia powder; 4-16% of magnesium chloride hexahydrate; 1-4% of a super absorbent polymer; and 0.5-1% of a retarding component. The invention further discloses a preparation method of the recycled aggregate. By adopting the technical scheme, the performance characteristics of the magnesium oxychloride cement can be fully utilized, the granular recycled aggregate with excellent performance can be prepared within a short time, and meanwhile, the influence of the water-cement ratio and composition of the concrete adhesion mortar is avoided, and the method can be used for preparing the recycled aggregate from various grades of recycled concrete. The crushing value, the apparent density, the water absorption rate and the firmness of the recycled aggregate prepared by the method meet the I-class requirements of GB/T25177 Recycled Coarse Aggregate for Concrete, the recycled concrete is utilized to the maximum extent, resources are saved, and the environment is protected.