122results about How to "Moderate porosity" patented technology

The present invention relates to one kind of suspended microbial carrier for biological waste water treatment. The mixture of rubber powder in 35-70 wt%, resin in 25-55 wt%, chemical foaming agent in 0.1-5 wt% and specific weight regulating material in 0-10 wt% is hot extruded to form shaped body of 0.90-1.1 g/cu cm specific weight and with great amount of closed bubbles. The suspended microbial carrier has great buoyancy, and can maintain suspension state in treated water after microbe attachment. In addition, nutritious matter may be added into the carrier material for promoting the colonization and growth of microbe.

The invention provides conjugate polyether, comprising 6-8 parts of polyether polyol EP-330N, 2-4 parts of polyether polyol SU-450L, 0.06-0.15 parts of non-hydrolytic surface active agent, 1.5-2 parts of water, 0.8-1.5 parts of nonyl phenol polyoxyethylene ether NP-10, 0.03-0.05 part of foaming catalyst PC52, 0.3-0.5 part of foaming catalyst NE300 and 1.3-2 parts of ethyl diethyl phosphate. The invention further provides a polyurethane raw material composition, polyurethane foams and applications thereof. Compared with the conventional polyurethane foams, the polyurethane foams in the invention have low density, low mass, proper aperture ratio, good sound-proofing effect, and good heat insulating effect, and compared with the polyurethane foams with middle and high density, the cost of the polyurethane foams in the invention is lower. While the polyurethane foams in the invention have low density, the polyurethane foams can reach the application standards of thermal insulation materials, sound-proofing materials, sandwich panels for construction, spraying materials for ceilings of automobiles or filling materials and the like. The conjugate polyether is a total-moisture foaming system, has no damage to ozone layer and has the advantage of environmental protection.

The invention provides a porous tantalum-niobium alloy. The porous tantalum-niobium alloy has a pore structure with interconnected through holes. The porosity of the porous tantalum-niobium alloy is 50%-70%. A preparation method of the porous tantalum-niobium alloy comprises the following steps: uniformly mixing tantalum powder and niobium powder, then adding a dispersing agent solution, uniformly mixing so as to obtain tantalum-niobium mixed powder slurry, and filling the tantalum-niobium mixed powder slurry into a porous template, thus obtaining the porous template containing the tantalum-niobium mixed powder slurry; drying the porous template containing the tantalum-niobium mixed powder slurry in vacuum so as to obtain a biscuit; heating the biscuit to 400 DEG C-600 DEG C in a protective gas atmosphere, and carrying out degreasing treatment, thus obtaining the degreased biscuit; and sintering the degreased biscuit in vacuum so as to obtain the porous tantalum-niobium alloy. The porous tantalum-niobium alloy has a three-dimensional connected structure and appropriate porosity, and the elasticity modulus of the material is reduced while the proper strength and porosity are ensured, so that the elasticity modulus is appropriate to that of human bones. The preparation method of the porous tantalum-niobium alloy is simple in process and equipment and low in cost; the porosity of the porous tantalum-niobium alloy is easy to adjust.

The invention relates to a mineralization guided tissue regeneration membrane and a preparation method and application thereof, wherein the mineralization guided tissue regeneration membrane comprises: a loose layer formed by compositing type I collagen and nano hydroxyapatite; a compact layer positioned on the loose layer and formed from type collagen. The double-layer mineralization guided tissue regeneration membrane is constructed herein, wherein the loose layer is consistent to autogenous bone in terms of composition, and the membrane may be attached to diseased oral bone defect surface to induce the generation of new bones; the surface of the compact layer is smooth, a diseased area may be isolated from surrounding tissues by making good use of physical barrier function of the membrane, regenerating capacity of a specific tissue is given to maximum play, and the prepared mineralization guided tissue regeneration membrane has high tensile strength and elasticity.

The invention discloses a high-strength antifriction double-layered iron base powder metallurgy material and a preparation method thereof. The preparation method comprises the following steps that a densification enhancer is mixed in a matrix, so that a matrix material is dense and high in strength; a compound pore-forming agent is mixed in a surface layer to enable a surface layer material to be porous and oil-bearing, and besides, the requirements on the hardness and the wear resistance of the surface layer are met, and the contact interface and the lubricating condition of a friction pair are kept stable, so that the novel high-strength antifriction double-layered iron base powder metallurgy material is prepared. The bearing property, the wear resistance and the antifriction anti-seizing property of the iron base powder metallurgy material are improved remarkably, and high strength and a high lubricating property are effectively combined.

The invention relates the method of producing filtering material used in bio-aeration filter tank. The lightweight and highly effective biology filtering material comprises 65wt%-80wt% red earth ore, 10wt%-30wt% coal ash and 5wt%-15wt% pore-forming agent. The method comprises the following steps: breaking the 65wt%-80wt% red earth ore, drying at 130Deg.C-170Deg.C; fetching 10wt%-30wt% coal ash; fetching 5wt%-15wt% pore-forming agent, water content being below 3%, mixing them, adding water to form ball, drying, calcining, at 1050Deg.C-1250Deg.C, cooling, breaking, barreling and screening until the grain size being 3-8mm. The invention has the advantages of macroporous structure, rough surface, proper void ratio and large specific surface area. Every property is satisfied for the request of bio-aeration filter tank filtering material.

The invention provides a porcine arterial vacuum lyophilization acellular matrix, as well as a preparation method and application thereof. The preparation method of the porcine arterial vacuum freeze-drying acellular matrix comprises the following steps: performing vacuum lyophilization to the porcine arterial blood vessels to obtain the best pore by adopting an optimal pre-freezing velocity; rehydrating the matrix with low-concentration detergent and performing acellular treatment; and lyophilizing the matrix and storing at normal temperature. The matrix has the advantages that the porcine aorta is used as a studying object, and a lyophilized acellular blood vessel with proper porosity, mechanical performance and immunogenicity is produced by virtue of optimized preparation conditions; animal in-vivo experiments prove the practicality of three-dimensional blood vessel clinical vascular transplantation, and experimental basis is provided to further clinical application; the preparation method has extremely low cost, so that precious medical resources reach billions of RMB can be saved assuredly; and experimental basis and guidance are provided to clinical application of tissue engineering arterial blood vessels and optimizing research and development of acellular blood vessels.

The invention discloses a double-layer compound biological filter material for an aerated biological filter. The double-layer compound biological filter material is formed by combining an inner layer and an outer layer, wherein the inner layer consists of attapulgite clay and fly ash in a weight ratio of 4:6; and the outer layer consists of attapulgite clay, kieselguhr and coal dust in a weight ratio of 7-10:9-12:1. The preparation method comprises the following steps of: uniformly mixing the attapulgite clay and the fly ash, and forming inner cores of solid spheres in a granulator; uniformly mixing the attapulgite clay, the kieselguhr and the coal dust to obtain mixed powder, continuously and slowly adding the mixed powder into the granulator to coat the surfaces of the inner cores of the solid spheres for granulation to obtain the finished product spheres; and drying the finished spheres naturally for 24 hours and in a constant-temperature fan drying box at the temperature of 120 DEG C for 2 hours, taking the finished spheres out of the drying box, directly putting the finished spheres in a box-typed resistance furnace to sinter the finished spheres at the temperature of between 950 and 1.050 DEG C for 20 minutes, and naturally cooling the finished spheres to obtain the double-layer compound biological filter material. The double-layer compound biological filter material obtained by the preparation method has the advantages of rough surface, high void ratio, good wearing resistance, high strength, easy film formation and high economy and practicability.

The invention relates to a bacterial cellulose porous foamed material and a preparation method thereof. Pores in the foamed material exist in bacterial cellulose hydrogel, are dense and in large quantities and have a uniform size. The preparation method comprises the following steps: (1) preparing the nanometer bacterial cellulose hydrogel; (2) soaking the bacterial cellulose hydrogel in a hydrogen peroxide or acid solution; (3) heating the hydrogen peroxide solution in which the bacterial cellulose hydrogel is soaked, adding a strongly oxidizing agent or adding a catalyst at room temperature, and carrying out uniform reaction; or adding excess carbonate into the acid solution in which the bacterial cellulose hydrogel is soaked, and carrying out uniform reaction; (4) carrying out cleaning with water; and (5) carrying out shock cooling or gradual cooling and then carrying out freeze drying so as to obtain the bacterial cellulose porous foamed material. The bacterial cellulose porous foamed material has great pores suitable for growth of cells, a high specific surface area and appropriate porosity. Experiment results show that cells grow well in the pores. The bacterial cellulose porous foamed material has application potential in the aspect of a scaffold for tissue engineering.

The invention relates to a rapidly-assembled ecological planting module with variable bottom flexibility for mountain restoration and a preparation method of the rapidly-assembled ecological plantingmodule, and is applicable to rapid greening and repairing of broken hills and smooth steep slope rocks. The rapidly-assembled ecological planting module with the variable bottom flexibility comprisesa stainless steel wire mesh, a soft attaching layer, a lower palm fiber protection layer, a lower water-retaining agent layer, a seed center layer, an upper water-retaining agent layer, an upper palmfiber protection layer and a soft surface layer. The rapidly-assembled ecological planting module is convenient to produce, suitable in porosity, good water and moisture preservation performance and rapid to mount, sufficient growth space of plant root systems can be ensured by the aid of buffering and adjusting actions of long palm fibers, surviving and growing of the plants are facilitated, andthe soft attaching layer can ensure that the module adapts to mountain slopes with different surfaces.

The invention discloses a method for establishing a zoysia plant lawn with river sand as a matrix. The method comprises the following steps that firstly, a soil bed is prepared; secondly, river sand is used for covering; thirdly, creeping stems and erect stems of zoysia plants are collected; fourthly, theziysia stems are planted; fifthly, management after establishing is carried out, wherein 1, watering, 2, topdressing and 3, trimming are carried out. Compared with the prior art, the method has the advantages of the method for establishing a lawn through sand cultivation, and the number of new roots, the length of the new roots and the daily increasing number of the new roots of the planted zoysia plants can be effectively increased with the special river sand in combination with other treatment methods; meanwhile, the method has the advantages that operation is easy and convenient, the growth cycle is short, the survival rate is high, no damage is caused to soil resources, and the incidence rate of pest and disease damage and weeds is low.

The invention discloses a preparation method of a nanofiber SSC based cathode material, and relates to a preparation method of a cathode, aiming to solve the technical problem of large interfacial polarization impedance of the cathode prepared by the method. The composite cathode comprises an electrolytic strip, an anode or a cathode as support bodies, and the one-dimensional nanofiber SSC cathode material Sm(1-x)SrxCoO(3-delta) adhered on the support bodies, wherein electrolyte nanoparticles are adhered on the SSC fiber. The preparation method of the composite cathode comprises the steps of soaking a one-dimensional nanofiber SSC cathode framework in a small amount of electrolyte precursor liquid by multiple times; and sintering to obtain the composite cathode based on the one-dimensional nanofiber SSC material. The composite cathode provided by the invention can be used in a medium-and-low-temperature solid oxide fuel battery.

The invention discloses a method for producing water-permeable brick. The water-permeable brick comprises a surface layer and a bottom layer, and the surface layer and the bottom layer are closely combined to form one body; the surface layer and the bottom layer respectively comprise aggregates and a binder for bonding the aggregates; and the aggregates are ceramic wastes, hard kaolin and coal gangue. The binder comprises, by weight, 20-30 parts of boron mud, 10-15 parts of lithium feldspar and 8-15 parts of modified diatomaceous earth. The ceramic wastes, hard kaolin and coal gangue are adopted as aggregates, so the use amount of the ceramic wastes is greatly reduced, the current situation of shortage of raw materials is overcome, and industrialized mass production can be easily achieved.Optimized composition design and a reasonable component ratio in the invention facilitate the formation of the microstructure of a compact green brick with a suitable porosity, and effectively improve the compressive strength and the water permeability of the finished water-permeable brick.

The invention discloses a high-performance and low-expansion ceramic product. The high-performance and low-expansion ceramic product comprises a green body layer and a glaze layer, wherein a transition layer is arranged between the green body layer and the glaze layer. In addition, the invention also discloses a preparation method for the above-mentioned high-performance and low-expansion ceramicproduct. According to the invention, through designing of a formulation system, a composite ceramic material composed of the green body layer, the transition layer and the glaze layer is formed, has good thermal shock resistance, is applicable to high-power electric appliances, thereby well meeting the use requirements of low-expansion ceramic products like heat-resistant cookwares and facilitating promoting technological progress and application development of the low-expansion ceramic industry.

The invention provides a preparation method of a sintered anode foil for an aluminum electrolytic capacitor. The preparation method comprises the following steps: S1, preparing aluminum powder slurry;s2, making the uniformly mixed slurry into a film on a substrate and curing the film; s3, degreasing the substrate obtained in the S2; s4, sintering the substrate obtained in the S3; and S5, formingthe substrate obtained in the step S4. According to the method for sintering the anode foil, it can be guaranteed that degreasing is clean and complete, the state in the sintering process is stable, overburning is avoided, and holes are uniform after sintering.

The invention provides large-flow state light foamed mixed soil which comprises the following components by mass: 1.5-3.5kg of cement, 1.0-2.5kg of an admixture, 0-2.5kg of clay, 0.5-2.5kg of sand, 1.5-3.5kg of water, 150-300g of a foam group, 0.5-2.0g of a water reduction agent, 0-2.0g of a sedimentation shrinkage reduction agent and 0-1.5g of a foam stabilizer, wherein the foam group is made byfoaming a high-performance animal protein modification foaming agent. The light foamed mixed soil has the characteristics of being high in flowability, high in strength, high in stability, low in shrinkage deformation, high in durability, low in cost, convenient to construct, and the like, the flowability of the light foamed mixed soil can be increased by 30-50% when being compared with that of common foamed light soil, the stability is improved by 50-100%, and the light foamed mixed soil is particularly applicable to fields such as backfill of complex parts such as brokebacks of bridge platforms, pipe galleries/pipelines, tunnels and coal mines, and heat preservation and water resistance of lining layers and roofs in municipal administration and road engineering, and belongs to novel, light, large-flow state foamed light mixed soil with excellent properties.

The invention relates the method of producing filtering material used in bio-aeration filter tank. The highly effective biology filtering material comprises 70wt%-90wt% red earth ore and 10wt%-30wt% coal ash. The filtering material is out-of-shape, and the grain diameter is between 3mm and 8mm. The method comprises the following steps: breaking the 70wt%-90wt% red earth ore, drying at 130Deg.C-170Deg.C; fetching 10wt%-30wt% coal ash; fetching 5wt%-15wt% pore-forming agent, water content being below 3%, mixing them, adding water to form ball, drying, calcining, at 1050Deg.C-1250Deg.C, cooling, breaking, barreling and screening until the grain size being 3-8mm. The invention has the advantages of macroporous structure, rough surface, proper void ratio and large specific surface area. Every property is satisfied for the request of bio-aeration filter tank filtering material.

The invention relates to the technical field of preparation of oil absorbing materials, and specifically relates to a preparation method of a degradable oil absorbing material. According to the preparation method, meerschaum and enteromorpha prolifera are used as raw materials to prepare activated stone slurry and purified algae cellulose, nanofiber is scattered in the activated stone slurry so asto obtain nanofiber sponge sizing agent, the purified algae cellulose and the nanofiber sponge sizing agent are mixed so as to obtain a dispersed sizing agent, and compound sponge fiber, poly dimethylsiloxane, liquid paraffin wax and other matters are mixed and put into a fermentation tank to be fermented and modified, so as to obtain the degradable oil absorbing material. The meerschaum fiber isadsorbed on the surface and in pores of the organic nanofiber, so that the oil absorbing quantity of the oil absorbing material is increased; the poly dimethylsiloxane and other oily matters generateoleophilic nonpolar radicals on the surface of the fiber sponge, so that the oleophilic and hydrophobic performance of the fiber sponge is enhanced; and the fiber materials and the stone slurry are easy to recycle and do not pollute the environment. The preparation method has a bright application prospect.

The invention provides a bacterial earthworm filter for synchronous treatment of sewage and sludge. The bacterial earthworm filter comprises a pool body, wherein a rotary water distributing device, an elastic filler layer, a biological ceramsite filter layer, a first spacer layer, an activated zeolite filter layer, a second spacer layer, a volcanic rock particle filter layer and a sedimentation tank are sequentially arranged in the pool body from top to bottom. The lower parts of the biological ceramsite filter, the activated zeolite filter layer and the volcanic rock particle filter layer are all provided with supporting frame base plates, the supporting frame base plates are all fixed to the inner wall of the pool body and are covered with stainless steel filter screens with 1-2 mm apertures. Eisenia fetida are inoculated in the filter layers according to the inoculation density of 12-30 g eisenia fetida per liter of filter materials. The invention further provides an application method of the bacterial earthworm filter. Synchronous treatment of domestic sewage and sludge is achieved under the combined effect of earthworms, microbes and the filter materials. The bacterial earthworm filter is simple in process, low in construction cost and operation cost, convenient to manage and free of secondary pollution.

The invention discloses a preparation method of a nano-cable-connected ternary composite electrode material. Fluorine-containing aniline and aniline as polymerization monomers are added with an oxidizing agent and the reaction system undergoes a polymerization reaction in an acid aqueous solution, and the reaction product is subjected to precipitation, washing and drying so that a polymer of fluorine-containing aniline and aniline is obtained; the polymer of fluorine-containing aniline and aniline is dissolved in a solvent so that a spinning precursor is obtained, the spinning precursor is subjected to high-voltage electrostatic spinning, and then the spun precursor is subjected to vacuum drying so that electrospun fibers of the polymer of fluorine-containing aniline and aniline are obtained; and graphite oxide, the electrospun fibers of the polymer of fluorine-containing aniline and aniline, and a soluble metal salt are uniformly dispersed in an alcohol aqueous solution, the mixed solution undergoes a reaction under hydro-thermal conditions, and the reaction product is washed by deionized water and ethanol so that the composite material of graphene-metal oxide nano-sheets and fluorine-containing aniline polymer-metal oxide nano-cables is obtained. The nano-cable-connected ternary composite electrode material has good power characteristics and good stability and can be used as a super capacitor having a long circulation service life and high energy storage power density.

The invention relates to the technical field of medical device design, and discloses a porous stent for bone repair. The porous stent comprises a plurality of structural units; the outer contour of each structural unit is in a regular quadrangular prism shape, the bottom side length of the regular quadrangular prism is a, and the height is h; each structural unit comprises supporting beam columns,a central beam column and connecting rods, wherein the supporting beam columns are arranged at the four side edges of the regular quadrangular prism respectively, the central beam column is arrangedat the center of the regular quadrangular prism and is parallel to and flush with the supporting beam columns, the connecting rods are correspondingly arranged between the supporting beam columns andthe central beam column, and the cross-sectional radius of the supporting beam columns and the cross-sectional radius of the central beam column are both R; the structural units are arrayed to form the porous stent. The invention also provides a preparation method of the porous stent for bone repair. The porous stent has the advantages of high porosity, low elasticity modulus, high bearing capacity and the like.

The invention discloses a biological treatment device for exhaust gas, which comprises two main parts, namely a prewashing tank and a biological treatment tank. The exhaust gas enters the biological treatment tank for purification after the exhaust gas is washed by spray water in the prewashing tank, wherein a filling in the biological treatment tank adopts a mixture of bioactivity ceramisites and oyster shells, and spray liquid of the biological treatment tank adopts precipitated outlet water of a secondary sedimentation tank of a sewage treatment plant. The biological treatment device for the exhaust gas has the characteristics: the adopted mixed filling has light weight, proper porosity, long service life, easy film formation and excellent hydrophilicity, is suitable for microorganisms to form films thereon, and has wide sources and low price; and the spray water adopts the precipitated outlet water of the secondary sedimentation tank, the requirement on the growth of the microorganisms can be met, the number of functional microorganisms in the biological treatment tank is effectively guaranteed, the operation procedure is simplified, the operating cost is effectively reduced, and the treatment efficiency is improved.