41results about How to "Good internal pore structure" patented technology

The freeze forming preparation process of ternary lithium ceramic microsphere includes the following steps: mixing the material for ternary lithium ceramic microsphere, high molecular adhesive and solvent, mixing in a ball mill to form suspension slurry and defoaming; dropping the slurry into cooling medium to form microsphere in a microsphere forming unit, and low temperature vacuum drying in a freezing drier to form ceramic microsphere precursor; roasting, calcining and sintering; and programmed heat treatment to obtain ternary lithium ceramic microsphere. The ternary lithium ceramic microsphere has high sphericity, controllable size, high size dispersivity, high apparent density, high phase purity, high strength and other features.

The invention provides dry-mixed mortar prepared from industrial solid waste. The dry-mixed mortar is characterized by being prepared from materials in parts by weight as follows: 100 parts of cement, 300-400 parts of river sand, 50-100 parts of steel slag, 0-50 parts of iron mine tailings, 0-50 parts of glass powder, 1-2 parts of an interface reinforcing agent, 1-2 parts of an exciting agent, 0.1-0.5 parts of a water retaining agent, 1-2 parts of a water reducing agent and 0.1-0.3 parts of reinforcing fibers. According to the dry-mixed mortar, the industrial solid waste is fully utilized as aggregate to replace natural river sand, environmental protection is facilitated, resource recycling is realized, and meanwhile, performance such as the freezing resistance, the permeability resistance and the like of the dry-mixed mortar is improved through addition of the industrial solid waste.

The invention discloses a regenerated concrete production technology. The regenerated concrete production technology comprises the following steps: crushing waste concrete, carrying out primary sieving and washing to obtain regenerated coarse aggregate and regenerated fine aggregate; heating the regenerated coarse aggregate and the regenerated fine aggregate to 300 to 400 DEG C; crushing again; carrying out secondary sieving after crushing, so as to obtain refined coarse aggregate and regenerated fine aggregate; putting the refined coarse aggregate and the regenerated fine aggregate into a sealed container and carbonizing; controlling the relative humidity to be 40 to 85 percent and the CO2 concentration to be 30 to 75 percent until the weight of non-carbonized regenerated aggregate is less than or equal to 5 percent; S4, preparing regenerated concrete; stirring and mixing the regenerated aggregate treated by S3 with raw aggregate, an adhering material, filler and an additive, so as toobtain a finished product. With the adoption of the regenerated concrete production technology, waste concrete is subjected to multi-level treatment to obtain relatively qualified regenerated aggregate, and mechanical properties are also greatly improved; meanwhile, the effect of slowly releasing carbon dioxide is realized after the concrete is carbonized, drying shrinkage and creep in the laterperiod can be relieved and the stress and anti-permeability capability of the regenerated aggregate are improved and the service life of the regenerated aggregate is prolonged.

The invention discloses a biological aerated filter system with alkaline leaching excess sludge as filler, an operating method of the biological aerated filter system and a preparing method of the filler, and belongs to the technical field of sewage disposal. The biological aerated filter system comprises a water inlet and a water outlet, and further comprises a filter layer, the filler, a microporous aeration device and a backwash device. The biological aerated filter system is provided with the filter layer, the microporous aeration device and the backwash device in sequence from top to bottom, the space between the filter layer and the microporous aeration device in the biological aerated filter system is filled with the filler, the water inlet is located in the top of the biological aerated filter system, the water outlet is located in the bottom of the biological aerated filter system, the space between an inner column layer and an outer column layer of the biological aerated filter system is sealed to be vacuum, and the outer surface of the inner column layer is closely wrapped with a heat insulation glass wool layer. Due to the heat insulation arrangement, the biological aerated filter system still has high ammonia nitrogen and phosphorus removing efficiency in cold winter. By the adoption of the up-to-bottom water inlet mode, the problem that filler is likely to cause blockage is relieved; meanwhile, the purpose of recycling the industrial waste alkaline leaching excess sludge is achieved.

The invention discloses a low-friction low-smoke halogen-free flame-retardant polyolefin cable material and a preparation method thereof, and relates to the technical field of cable materials. Raw materials of the cable material comprise: matrix resin, a flame-retardant filler, a hydrophobic surfactant, a compatilizer, a slipping agent and an antioxidant; wherein the matrix resin comprises an ethylene-vinyl acetate copolymer and a propylene-ethylene copolymer; the flame-retardant filler comprises aluminum hydroxide and magnesium hydroxide; and the slipping agent comprises oleamide and siliconemaster batch. The cable material has excellent low-temperature flexibility. The preparation method comprises the following steps of: heating the ethylene-vinyl acetate copolymer to a molten state, and spraying a hydrophobic surfactant aqueous solution while stirring to obtain a first mixture; adding the flame-retardant filler, the slipping agent, the compatilizer and the antioxidant into the first mixture, and mixing the substances uniformly to obtain a second mixture, and performing high-pressure banburying; subjecting the first mixture, the second mixture and the propylene-ethylene copolymer to mixing granulation so as to obtain a final product. The prepared product is uniform and stable in quality.

The invention belongs to the technical field of liquid detection, and in particular to a liquid sensor, and a preparation method and application thereof. The liquid sensor provided by the invention comprises graphene paper and silver coating, and the silver coating is coated on the surfaces of two opposite ends of the graphene paper; and the specific surface area of the graphene paper is 60-200 m2/g. The liquid sensor provided by the invention has various advantages of realizing the micro-detection of organic solvents, having excellent cycle stability characteristic, and being capable of combining vapor pressures of different solvents to identify the components of trace amount of organic solvents. The results of embodiments show that when acetone is detected by the liquid sensor provided by the invention, the minimum detection amount can reach 0.3 mu L, and the resistance response change amount is 0.1%.

The invention provides a wave-absorbing/lightweight structure integrated foam material as well as a preparation method and application thereof, and belongs to the technical field of advanced materials. The foam material is prepared from the following raw materials in parts by weight: 100 parts of a matrix resin monomer, 1-30 parts of a foaming agent, 0.05-15 parts of an initiator, 0-10 parts of a cross-linking agent, 0.5-50 parts of a tackifier and 1-100 parts of a wave absorbing agent. After a wave-absorbing agent is added into the foam material, a good foaming effect can still be achieved, and the wave-absorbing foam material with a uniform foam structure is obtained. The foam material is excellent in mechanical property, thermal mechanical property and wave absorbing property, and light and adjustable in functional weight. The foam material disclosed by the invention can be used as a light wave-absorbing structure and function integrated material with excellent performance, is used for preparing a structure/stealth integrated broadband wave-absorbing material with high strength, heat resistance and corrosion resistance, and has a wide application prospect.

The invention relates to an additive for dry reactive powder concrete powder and usage thereof. In percentage by weight, the materials of the additive are as follows: 5 to 55 percent of superplasticizer powder; 2 to 15 percent of air-entraining agent powder; 1 to 20 percent of defoamer powder; and 30 to 70 percent of coal ash. The invention organically integrates inorganic materials and organic materials together, and solves the problem of compatibility between the additive and the inorganic materials as well as the organic materials by way of modification. All the main property indexes of reactive powder concrete coordinate with, constrain and affect one another. By means of the additive, various properties of the reactive powder concrete are modified, such as the air-entraining effect and the shrinkage-reducing effect, consequently, after the dry reactive powder concrete powder is mixed with water, all the components are added to one another and affect one another, and thereby the main property indexes of the reactive powder concrete can meet the requirements of construction and designs.

The invention discloses a method for immobilizing laccase by an ionic liquid modified composite material, the ionic liquid modified composite material is used for immobilization of laccase, and the preparation comprises three main steps of preparation of the composite material, acidification of the composite material and modification of the ionic liquid. In the preparation process, firstly, rectorite is used as a raw material, and the rectorite composite material is prepared through calcination; then, abundant hydroxyl and amino are formed on the surface of the rectorite composite material through acidification and coupling agent modification, and finally, the hydroxyl and the amino are combined with the ionic liquid, so that the carrier is further modified by the ionic liquid. The immobilization amount of the obtained immobilized enzyme is close to 120mg/g; the immobilized enzyme has good degradation and adsorption effects on common phenolic substances such as 2, 4-dichlorophenol, catechol and resorcinol, the degradation and adsorption rate of the resorcinol and the 2, 4-dichlorophenol exceeds 90%, the degradation and adsorption rate of the catechol is close to 80%, and wide application prospects are realized.

The invention provides a recycled aggregate energy-storage luminous water permeable brick, which comprises a water permeable brick main material layer and an energy-storage luminous water permeable brick material layer, the water permeable brick main material layer comprises the following components by weight: 20-30 parts of reinforced recycled aggregate, 10-15 parts of natural fine aggregate, 20-30 parts of Portland cement, 5-10 parts of a water reducer, and 2-5 parts of a slurry viscosity regulator; the energy-storage light-emitting water-permeable brick material layer comprises, by weight, 10-15 parts of red mud, 5-10 parts of fly ash, 2-5 parts of an exciting agent and 5-10 parts of water, and the energy-storage light-emitting water-permeable brick material layer further comprises, by weight, 3-5 parts of rare earth long-acting noctilucent powder, 5-10 parts of silica fume and 2-3 parts of water on the basis of the water-permeable brick main material layer. The production cost of the water-permeable brick is reduced, the application range of the water-permeable brick is expanded, and the ecological problem caused by surface hardening is solved.

The invention relates to a composite material for an outdoor table tennis table. The composite material comprises the following raw materials in parts by weight: 90-110 parts of cement, 55-65 parts of river sand, 0.5-0.8 part of redispersible latex powder, 0.3-0.6 part of polypropylene fiber, 4-8 parts of fly ash, 3-6 parts of bagasse ash, 0.3-0.8 part of lignocellulose, 0.2-0.4 part of a reducing agent, 1-3 parts of metakaolin loaded zirconium dioxide, 36-48 parts of water, 5-10 parts of epoxy resin, 1-2 parts of a curing agent and 0.4-1 part of an auxiliary agent. The problems that an existing wooden table tennis table top is not suitable for outdoor use, not resistant to corrosion and prone to aging are solved.