79results about How to "Porosity change" patented technology

A patient-specific porous metal prosthesis and a method for manufacturing the same are provided. The orthopaedic prosthesis may be metallic to provide adequate strength and stability. Also, the orthopaedic prosthesis may be porous to promote bone ingrowth.

The invention provides an antibacterial bacteriostatic polysulfone hollow fiber ultrafiltration membrane, which is a mixture consisting of polysulfone (PS) dissolved in solvent and nanometer antibacterial material. Based on parts by weight, the ultrafiltration membrane comprises 5 to 25 parts of polysulfone, 0.05 to 5 parts of nanometer antibacterial material, 2 to 10 parts of additives, 65 to 90 parts of solvent. The invention simultaneously discloses a preparation method, which comprises: (1) dissolving the polysulfone in the solvent in a spinning liquid tank, adding the nanometer antibacterial material and the additives, mixing well and obtaining membrane casting liquid; (2) standing and curing the obtained product; (3) extruding the cured material in the spinning liquid tank, filtering the cured material through a filter so as to remove impurities, metering the obtained product through a metering pump and filtering the obtained product through the filter so as to remove the impurities; (4) spurting membrane silk through a silk-spurting plate; (5) forming the membrane silk into a membrane in coagulating bath; and (6) soaking the formed membrane in pure water in washing bath, washing the solvent and the additives away, winding and outputting the polysulfone hollow fiber ultrafiltration membrane. The membrane has a good bacteriostatic effect.

The present invention provides sintered polymeric materials and methods of making the same which are useful in a variety of applications. In one embodiment, the present invention provides a sintered polymeric material comprising at least one plastic and at least one elastomer.

The invention provides a hydrophilic polyethene microporous membrane and a preparation method thereof, belonging to a polyethene microporous membrane containing blending compatilizer with a polar group, calcium carbonate and thinner and a preparation method thereof. In the preparation method of the microporous membrane, polyethene, blending compatilizer, calcium carbonate and thinner are taken as raw materials; and hydrophilic polyethene microporous membrane is finally prepared by blending processing, membrane pressing by a flat bed presser, quenching by water bath in constant temperature, extracting by extracting agent, acid cleaning, washing and drying. The invention is characterized in that the blended compatilizer with a polar group is selected to react with the calcium carbonate particles, calcium carbonate particles are evenly filled into polyurethane base body through blending processing; and porous structures are formed by the thermal induced phase separation method and the method for removing fillings by acid cleaning. As for the hydrophilic polyethene microporous membrane prepared by the method, the range of the internal average aperture is 0.1-10mu m, the aperture rate is greater than 50% and the contact angle is less than 80 degrees.

The invention relates to an anode oxidating dyeing technique of aluminium extruded section product with a plurality of blind holes which has steps as follows: loading, removing oil, washing with clean water, washing and spraying, corrupting with alkali, washing with clean water, washing and spraying, cleaning with ultrasonic, washing with pure water, anode oxidating, cleaning, cleaning and spraying, washing with pure water, processing before dyeing, washing with pure water, dyeing, washing with pure water, closing with nickel salt, cleaning and spraying, washing with pure water, drying in vacuum. The technique changes oxidating film hole by using increase of oxidating temperature and electrolyte concentration for enhancing the film absorption ability to dye; a processing agent before dyeing can avoid poor dyeing effect caused by acid sewage flow in hole, screw hole of the anode oxidating product efficiently, and control poor dyeing effect, white point, color mistiness with flow hanging shape caused by residual medicinal liquor flow in dyeing by increasing dyeing ability of dye; replacement of dyeing agent can greatly increase stability of dyeing and prolong working life of dye, and increase absorption ability of the oxidating film to dye.

The invention relates to a method for preparing hydrophilic polypropylene microporous film. The method includes subjecting low-melting-index polypropylene and diluents in a weight ratio of (20:80) to (80:20), a blending compatilizer containing polar groups and accounting for 0.5% to 20% of the total weight of the polypropylene and the diluents, and a material which is composed of nucleating agents and accounting for 0.05% to 10% of the total weight of the polypropylene and the diluents to solution blending or melt blending at a temperature ranging from 180 DEG C to 210 DEG C to obtain mixed materials; forming film by using a film scraping method or a hot-press method at a temperature of 170 DEG C to 190 DEG C; quenching the film in thermostatic waterbath at a temperature between 0 DEG C and 50 DEG C; extracting the film in an extracting agent to remove the diluents; dipping the film in a hydrochloric acid aqueous solution, and washing the film through distilled water and drying the film to obtain the hydrophilic polypropylene microporous film. According to the hydrophilic polypropylene microporous film prepared by the method, the average bore diameter range is between 0.1 micron and 10.0 microns, poriness is larger than or equal to 40%, and the water contact angle is smaller than or equal to 95 degrees.

The invention discloses a method for repairing contaminated soil in a coal-to-gas plant by adopting a microbe-plant combined way. The method comprises the following steps: adding an electronic receptor preparation in the contaminated soil so as to promote anaerobic degradation of polycyclic aromatic hydrocarbons and analysis of heavy metals; mixing and composting the contaminated soil with pig manure and a conditioning agent for several days; eluting partial heavy metals from the soil by using clear water; planting sedum alfredii hance and festuca arundinacea in the soil in a mixed way so as to extract the heavy metals from the soil and promote microbial degradation of the polycyclic aromatic hydrocarbons in the soil, wherein in the growth stage of plants, additives are sprayed periodically to enhance the repairing effect. Through the adoption of the method, the environment friendliness is very high, the repairing cost is low, and the ecological environment of the contaminated soil can be effectively restored, so that the method has a broad market prospect.

The invention provides organic compost, which comprises 10-50 parts by weight of organic matter, 5-20 parts by weight of humic acid, 0.5-2.0 parts by weight of full nitrogen, 1.0-2.0 parts by weight of full potassium and 0.1-0.5 parts by weight of full phosphorus. The organic compost is prepared by mixing and fermenting heavily-polluted condensate water, crop straws, various plants or byproducts generated by preparing materials during making papers with ammonium sulfite method. The whole preparation technology is simple, wherein the heavily-polluted condensate water generated during making the papers and the crop straws are used for preparing organic fertilizer, the organic fertilizer is reused for the growth of crops, and the straws can be used for the paper-making industry, therefore, the technology is a positive cycle for the sustainable development of the industrial production. The organic compost can reduce the phenomenon of the hardening of soil, improves the structure of soil grains, effectively promote the roots to grow, obviously increase the amount and the thickness of the roots, stimulate the growing development of the crops, enhance the stress resistance performance of the corps, and improve the quality of farm produces, etc.

The invention discloses an abrasion-resistant gear and a preparation method. A gear material comprises, by mass, 65%-85% of ferrum, 0.3%-1.2% of manganese dioxide, 0.5%-1.6% of molybdenum disulfide, 0.1%-0.9% of nickel oxide, 0.3%-1.2% of cobalt carbide, 1%-3% of silicon carbide, 1%-3% of silicon dioxide, 0.2%-0.8% of chromium, 1.5%-3.5% of tin, 3%-15% of copper, 0.1%-0.3% of phosphorus, 0.1%-0.5% of zirconium, 0.3%-2% of graphite, 0.5%-2% of lanthanum-cerium alloy, 0.2%-0.8% of auxiliaries and the balance inevitable microelements and impurities. The preparation method mainly comprises the steps of weighing of raw materials, pretreatment, component mixing, preforming, high-temperature sintering and aftertreatment. The produced gear material has high strength and hardness and also has good abrasion resistance and impact resistance.

The invention provides a preparation method of a lithium-rich manganese-based cathode material for a lithium ion battery, which comprises the following steps of: uniformly mixing carbonates of Mn, Niand Co, lithium sources and auxiliaries according to a certain proportion to obtain mixed powder; Sintering the mixed powder at 500 DEG C for 5 to 10 minutes, and then sintering at 700 to 1000 DEG C for 20 to 40 minutes; At that end of sinter, the powder is transfer into liquid nitrogen, liquid argon or liquid oxygen to be quenched, cooled, taken out and dried, and sieve to obtain a lithium-rich manganese-based cathode material for lithium ion batteries. As that quench after sinter of the invention can promote the shrinkage of the particles, so that that pore of the particles become small, More compact stacking, the vibrating density of the material particles is increased, The increase of vibrating density improves the machinability of the material, effectively enhances the energy densityof the cell system, at the same time, it can refine the grain size, increase the specific surface area of the material, improve the contact between the material and the electrolyte, and effectively enhance the comprehensive electrochemical properties of the material--in addition, it greatly improves the utilization rate of the equipment and the production efficiency.

The invention provides a preparation method of a multi-layer lithium battery diaphragm with high security. A microporous diaphragm is prepared by multi-layer coextrusion and unilateral stretching methods. The equipment and process technology of the method are perfect. A functional layer added with an inorganic filler or other pore-forming fillers and a polyolefin microporous membrane are subjected to composite strip casting in a multi-layer coextrusion manner; a multi-layer composite microporous membrane precursor is molded once; and then the composite membrane precursor is subjected to thermal treatment, multi-layer recombination and uniaxial stretching to obtain a high-performance microporous membrane. The microporous membrane obtained by the preparation method is uniform in pore size distribution, high in production efficiency, free of pollution, low in cost and beneficial to large-scale production; and in addition, according to the method, the pore size and distribution are easy to adjust.

The invention discloses a large-size double-continuous porous foam bismuth and a preparation method thereof. A material is formed by continuous three-dimensional nanometer bismuth network structures and continuous three-dimensional pores which are connected to each other so as to form a three-dimensional composite structure of a macro dimension. The preparation method of the material comprises thefollowing steps of manufacturing lead-bismuth alloy; using an electrochemical method to carry out de-alloying processing on the lead-bismuth alloy; and cleaning and drying the material after the de-alloying processing to obtain a double-continuous porous foam bismuth material. The preparation method adopts a simple technology, a raw material can be recycled and cost is low. The obtained double-continuous porous foam bismuth material has a large specific surface area, completely continuous two phases, uniform pore distribution, and a continuous bismuth network, a pore size can be controlled inmicrometer and nanometer ranges, and a macroscopic large-sized three-dimensional nano-structure material. The three-dimensional nano-structure material can be applied to fields of a high performancesecondary cell, electro-catalysis, photoelectrocatalysis and the like.

The invention discloses a method for preparing a porous polymer material by selective biodegradation, belongs to the technical field of a biodegradable high molecular material, and solves the technical problems of a preparation method of the porous polymer material in the prior art that poisons are caused to cells, the connectivity between holes is poor and the porous polymer material cannot be used as a human tissue bracket. The method disclosed by the invention comprises the following steps of: commixing a biodegradable polymer and a non-biodegradable polymer or commixing various biodegradable polymers to obtain a commixed material; and then, carrying out selective degradation on the biodegradable polymers in the commixed material by utilizing the selectivity of a microorganism or an enzyme to obtain the porous polymer material. The preparation method disclosed by the invention is simple in process, moderate, clean and environment-friendly, and strong in selectivity; and the holes of the prepared porous polymer material are controllable and the porous polymer material can be used as a human tissue bracket material.

The invention discloses an antiviral small nucleic acid and the application of the small nucleic acid in preparing a medicine for suppressing herpes simplex virus (HSV) and human papilloma virus (HPV). The small nucleic acid is a double strand nucleic acid, the positive-sense strand sequence is 5 in a sequence table, and the antisense strand sequence is 6 in the sequence table; the small nucleic acid can be prepared into a temperature-sensitive type gel preparation; the temperature-sensitive type gel preparation is injected (or sprayed) into irregular cavities such as vagina or mouth, the expression of host B2M genes in epithelial cells at the cavities and the cervix uteri and the expression of externalHPV E7 are suppressed, so that the antiviral small nucleic acid can be used for suppressing the infection of the HPV of the HSV-1 virus and/or for treating the precancerous lesions of uterine cervix caused by the HVP.

The invention relates to the field of plastic additives, and particularly discloses a biodegradable color master batch and a preparation method thereof. The biodegradable color master batch is prepared from the following raw materials: poly(butyleneadipate-co-terephthalate), polycaprolactone, a pigment, a plasticizer, a dispersing agent and a compatilizer, wherein the plasticizer is prepared frommicrocrystalline cellulose, ethyl cellulose, tributyl citrate and castor oil in a weight ratio of 3-5:2-4: 1-2: 1-2; the preparation method comprises the following steps: premixing polycaprolactone and the plasticizer, adding the poly(butyleneadipate-co-terephthalate), and carrying out melting, extrusion and granulation to obtain a PBAT premix; and mixing the PBAT premix, the pigment, the dispersing agent and the compatilizer, and carrying out melting, extruding and granulating. The biodegradable color master batch disclosed by the invention can be used for dyeing degradable plastic products,and has the advantages of degradability and high dispersity in the plastic products.

The invention relates to a porous rare earth titanate heat-isolating material and a preparation method and an application thereof. The porous rare earth titanate heat-isolating material is of a porousstructure and the composition of the material is (Re2O3)X(TiO2)(1-X), wherein Re is at least one of Y and lanthanide elements, and X is equal to 0.2-0.8, preferably 0.4-0.7. The porosity of the porous rare earth titanate heat-isolating material is 10-90% and the pore diameter is 0.1-500 microns.

The invention discloses a seedling culture substrate for improving the seedling survival rate. The substrate is prepared from the following ingredients in parts by weight: 18 to 26 parts of humus soil, 8 to 17 parts of bran coat, 6 to 45 parts of turf, 1 to 5 parts of organic fertilizers, 25 to 45 parts of waste fungus rods and 2 to 5 parts of activation powder. The invention also discloses a preparation method of the substrate. The seedling culture substrate can be used for culturing high-quality seedlings; the adaptability of the seedlings is high; the disease and insect pest resistance of the seedlings is relatively improved; the survival rate is high; meanwhile, the soil structure is effectively improved; the soil microbes are activated; the soil fertility is increased; the soil water absorption and soil moisture preservation capability can be improved; the soil aggregate formation is promoted; the rainfall anti-erosion capability of soil is improved.

The invention discloses a ceramic-based composite material as well as a preparation method and application thereof. The ceramic-based composite material comprises the following components in percentage by mass: 20%-30% of carbon fibers, 20%-40% of C-VDC, 10%-25% of CVD-SiC, 5%-25% of PIP-SiC, 5%-15% of GSI-SiC, 5%-15% of TiC and less than 3% of residual Si. The preparation method sequentially comprises the following steps: deposition of a C layer on a carbon fiber preform; deposition of a SiC layer; impregnation and cracking of a precursor for preparation of SiC; impregnation of asphalt and carbonization; preparation of TiC; and gas-phase siliconizing. The ceramic-based composite material disclosed by the invention has the advantages of excellent friction and wear resistance, mechanical properties and thermal properties, the content of each component can be flexibly designed and adjusted according to actual requirements, and the requirements of the field of high-performance braking andaerospace structural parts on material properties are met.

The invention provides a porous titanium/titanium dioxide nano tube composite flat sheet membrane and a preparing method thereof. The preparing method comprises the following steps that firstly, membrane casting liquid is prepared and comprises following components including, by weight percent, 50%-65% of titanium powder, 4%-7% of a binding agent, 0%-1% of a thickening agent and the balance solvents; secondly, membrane scraping is conducted; thirdly, sintering is conducted; fourthly, cleaning is conducted; fifthly, anodic oxidation is conducted, and a porous titanium flat sheet membrane obtained in the fourth step is subjected to anodic oxidation in a fluorine ion containing organic solution system; and sixthly, heat treatment is conducted, a sample obtained after anodic oxidation in the fifth step is subjected to heat treatment at the temperature ranging from 400 DEG C to 600 DEG C, and the porous titanium/titanium dioxide nano tube composite flat sheet membrane is obtained. The composite flat sheet membrane obtained through the porous titanium/titanium dioxide nano tube composite flat sheet membrane and the preparing method of the porous titanium/titanium dioxide nano tube composite flat sheet membrane can be applied to a filter system and can also be used in the catalysis aspect, operation is simple, cost is low, and industry production can be achieved.

The invention provides an organic compost, which comprises the following components in part by weight: 10-50 organic matter, 5-20 humic acid, 0.5-2.0 total-N, 1.0-2.0 total-K and 0.1-0.5 total-P. The organic fertilizer is made by mixing and fermenting heavily polluted condensed water caused by black fluid concentration in the paper making process, crop straws, various plant organic matters or material preparing byproduct. The whole preparing technology is simple. The heavily polluted condensed water generated again in the paper making process and the straws are used to produce the organic fertilizer which is applied to the growing process of the crops again. The newly grown straws can be applied to the paper making industry. The cyclic utilization is the virtuous cycle of the sustainable development of industrial production. The organic compost reduces the soil hardened phenomenon, improves soil granular structure and can effectively promote the root to grow, obviously increase the number and thickness degree of the root, stimulate the crops to grow, strengthen the stress resistant performance of the crops and improve the quality of the crops.