169results about How to "Improve microporous structure" patented technology

An implantable microporous ePTFE tubular vascular graft exhibits long term patency, superior radial tensile strength and suture hole elongation resistance. The graft includes a first ePTFE tube and a second ePTFE tube circumferentially disposed over the first tube. The first ePTFE tube exhibits a porosity sufficient to promote cell endothelization, tissue ingrowth and healing. The second ePTFE tube exhibits enhanced radial strength in excess of the radial tensile strength of the first tube.

The invention discloses a ceramic filter film of rare-earth modified attapulgite with a nano coating, which comprises a ceramic supporting body and separation film, wherein the ceramic supporting body is plate-type porous ceramic sintered by modifier added with rate-earth oxide in attapulgite clay and intensifier, the ceramic supporting body has the characteristics of high porosity, uniform pore diameter, high strength, light weight and the like; the separation film is a nano decoration coating, and has outstanding hydrophilicity and lipophobicity. The coating film liquid is produced by nano attapulgite mixing with nano rare-earth oxide and relevant additive dispersing in water, coated on the ceramic supporting body surface via a soak-lifting method, and is sintered at high temperature to form porous separation film with nano surface characteristics; the ceramic filter film can be made into a hollow cavity-type structure, a plurality of combined revolving film components are used in rotary manner, more efficient initiative cross-flow operation can be realized, the film surface is self-cleaned by filter liquid brushing in the revolving process, and the blockage and pollution of the film can be greatly delayed.

The invention provides a thallium-containing wastewater strongly oxidizing, coagulating, adsorbing and recovering process. The process includes the following procedures: thallium-containing wastewater concentration, pH regulation, strong oxidization, coagulation, flocculation, precipitated sludge treatment, pH regulation, solid impurity filtration, removal of Zn, Pb, Cd and Tl, and the like. The process has the beneficial effects that the process has the advantages of advanced technology, maturity, good effluent quality, stability in operation, conciseness in process, strong practicability, easiness in start and stop, convenience in maintenance and management, small investment, low operating cost, small floor area for construction, short construction period and large application ranges of projects; treatment of heavy metal ion polluted sewage is not limited by temperatures; the limitation that a biological method can not be used in cold regions in the north can be overcome.

The invention discloses a method for producing activated carbon by thermally activating a coal tar dreg/sludge mixed fermentation body by using microwaves. The method comprises the steps of: firstly crushing and grinding coal tar dreg into more than 200 meshes, then, mixing the ground coal tar dreg with sludge, and performing aerobic fermentation for 10-20 days; then, adding zinc chloride servingas an activator into the mixed fermentation body, and infiltrating for 12-24h at 70-80 DEG C, wherein the added zinc chloride is 0.5-4 times more than the mixed fermentation body in mass; and finally, carbonizing and activating for 30-120min in a microwave carbonization furnace under a N2 protection condition to obtain coal tar dreg/sludge mixed activated carbon, washing with water till a neutralcondition is achieved, and drying to obtain a product disclosed by the invention. The method disclosed by the invention has the advantages of simplicity and convenience for operation, easiness for control, low cost, high product synthesis rate and favorable product performance, and can be widely applied to industrial wastewater treatment, refractory wastewater treatment, sound insulation, noise reduction, deodorization, oil absorption, lipid suction and other industries.

The utility model relates to a polymer electrolyte film for a micro cross-linking gel state lithium-ion battery and a preparation method, which is used for making the battery. The utility model discloses the poly-acrylonitrile-methyl methacrylate with the cross-linking degree of 0.1 to 0.4 % is obtained after suspension polymerization with the monomer component mass ratio of a methyl methacrylate and an acrylonitrile of 1:9 to 4:6, then the poly-acrylonitrile-methyl methacrylate is dissolved by a polar organic solvent and coated on a formed die, finally the micro cross-linking degree polymer electrolyte film is obtained when the film is removed from the formed die, the thickness of the film is 20 to 50um, the tensile strength is 7 to 22Mpa, and the average hole diameter is 0.1to 3um. The utility model has advantages of good conductivity, good absorbing capability, good heat stability, good electrochemical stability and good mechanical property under the ambient temperature, and simple manufacturing operation, high transforming rate of polymer, economy and environmental friendliness.

The invention relates to an adsorption material for separating and extracting lithium from brine, in particular to a doped lithium titanate adsorption agent and a preparation method thereof. The dopedlithium titanate adsorption agent HxLi4-xMyTi5-yO12 is obtained by doping M into crystal lattices of Li4Ti5O12 to form precursors Li4MyTi5-yO3 and then removing lithium by acid pickling, where M is one or a mixture of several of Ce, Sn, Nb, Zr, Mo, Ta, W, Mn and Hf; the value range of x is 0.0 to 4.0; the value range of y is 0.0 to 2.0. A titanium source, the lithium source and M salts are uniformly mixed, dried, roasted, cooled and are subjected to acid pickling to obtain the doped lithium titanate adsorption agent. The doped lithium titanate adsorption agent prepared by the method is used for performing adsorption lithium extraction on brine with the magnesium-lithium ratio being greater than 100; the lithium absorption rate is greater than 75 percent; the magnesium removal rate is greater than 99 percent; the stripping liquid acidity is high; the lithium enriching times is about 1 to 7 times; the titanium dissolution damage rate is low; the industrialized application prospects arerealized.

The invention discloses anti-freezing mortar special for aerated bricks, made from, by weight, 30-40 parts of mineral residue, 30-35 parts of cement, 25-30 parts of river sand, 0.5-1 part of a water reducing agent, 0.5-1 part of an air entraining agent, 1-2 parts of an anti-freezing agent, 4-6 parts of vitrified micro bubbles, 3-5 parts of Kapok fiber, 2-4 parts of rare-earth oxide, and 5-8 parts of modified attapulgite. Unique components are selected, their contents are reasonably matched, and the mortar and its products are good in strength, cracking resistance, water permeation resistance and temperature resistance and excellent in anti-freezing performance, are applicable to cold areas and areas having great temperature differences and have excellent performance, and potential safety hazards are decreased.

The invention relates to a foam two-sided adhesive tape, which belongs to the technical field of an adhesive tape. The foam two-sided adhesive tape comprises a foam basal plate, an adhesive coating and a release film, wherein longitudinal through holes are formed between the upper surface and the lower surface of the foam basal plate, the foam basal plate comprises the following components in parts by weight: 100 parts of PMMA, 28 to 35 parts of polyurethane, 18 to 23 parts of fluorine rubber, 1.5 to 3.2 parts of light stabilizer, 5 to 11 parts of mesoporous nano TiO2 and 20 to 30 parts of foaming agents. The longitudinal through holes are formed in the foam basal plate, so that adhesive forms a complete lattice system, the connection performance of the adhesive tape is improved, and the connected object is more stable and reliable. The foam basal plate which is light in weight, good in shock resistance and excellent mechanical performance is adopted as the base material of the adhesive tape, so that the prepared adhesive tape is high in strength, good in flexibility, high in impact resistance and applicable to the manufacturing of more precise instruments and equipment.

The invention provides a preparation method of a functionalized multiwalled carbon nanotube blended ultrafiltration membrane, comprising the following steps: putting dried MWCNT after acidized modification into thionyl chloride for reaction for 7-8h; drying a product and then adding the dried product into ethanol water, carrying out ultrasonic dispersion and then adding 3-aminopropyl triethoxy silane, continuing to carry out ultrasonic dispersion and then carrying out backflow for 1h at the temperature of 80 DEG C, filtering and drying to obtain the functionalized multiwalled carbon nanotube; adding the functionalized multiwalled carbon nanotube to an N, N-dimethylacetamide solution, carrying out ultrasonic dispersion and then adding polyvinylpyrrolidone and polyvinylidene fluoride, heating and stirring, cooling and then defoaming to prepare a casting film solution; pouring the casting film solution to a glass plate and scraping to form a membrane; pre-evaporating in air and then immersing into pure water; and taking out after the membrane falls out and then soaking with deionized water, and drying to obtain the functionalized blended ultrafiltration membrane. The hydrophilia, the anti-fouling performance and the mechanical performance of the functionalized multiwalled carbon nanotube blended ultrafiltration membrane are all enhanced, and the manufacture cost is low.

The invention discloses a preparation method of foaming stainless steel plate, and a preparation method of a heat-engine plant denitration catalyst, and belongs to the technical field of denitration catalyst. The preparation method of the denitration catalyst is capable of solving problems of existing denitration catalysts that carrier open pore area is small, and ash clogging resistance is poor. The preparation method of the foaming stainless steel plate comprises following steps: a hydride foaming agent and polyvinyl alcohol are added into aluminum alloy melt for uniform stirring; an obtained mixture is delivered into a mould, and is subjected to foaming treatment so as to obtain the foaming stainless steel plate. The foaming stainless steel plate is large in open pore area, and excellent in ash clogging resistance. The foaming stainless steel plate is taken as the carrier of the denitration catalyst, and the preparation method of the denitration catalyst comprises following steps: step 1, titanium gel is prepared; step 2, humic acid is added into the titanium gel for staling; step 3, the surface of the foaming stainless steel plate is coated with the titanium gel via spraying, and is dried and roasted; and step 4, the heat-engine plant denitration catalyst monomer is obtained via plate folding, brazing, and packaging. The denitration catalyst is wide in use temperature range, and low in use cost.

The invention provides a metal organic framework material-molecular sieve composite material and a preparation method thereof. The preparation method comprises: adding a ZSM-22 molecular sieve to a solution containing Zn(NO3)2 or Co(NO3)2, and imidazole or an imidazole derivative, stirring at a room temperature, carrying out a hydrothermal reaction to obtain a reactant, filtering the reactant, washing, and removing the templating agent to obtain the metal organic framework material-molecular sieve composite material. According to the present invention, the material with high adsorption performance is prepared by compounding the organic framework material with excellent adsorption performance and the ZSM-22 molecular sieve, wherein the specific surface area and the microporous structure ofZSM-22 can be substantially improved through the compounding of ZIF-8, and the high hydrothermal stability of the silicon-aluminum molecular sieve can be combined; and the product has the excellent adsorption performance of the organic framework material, and can be widely used in the fields of medicine, chemical industry, environmental protection and the like.

The invention discloses a porous zeolite air purification material. The material comprises, by weight, 37-40 parts of porous stone powder solution, 20-30 parts of acrylamide, 0.4-1 part of sodium diacetate, 3-4 parts of borax, 2-4 parts of aluminum dihydrogen phosphate, 1-2 parts of HEDP, 0.7-1 part of polydimethylsiloxane, 1-2 parts of calcium propionate, 2-4 parts of polyvinyl alcohol and 0.7-0.8 part of ammonium persulfate. Acrylamide serves as a monomer, HEDP is doped, and polymerization is conducted under the effect of an initiator, so that polymer emulsion is obtained; then the polymer emulsion is mixed and reacts with the polyvinyl alcohol solution of porous stone powder, the compatibility between the compound stone powder and the polymer is effectively improved, and then the stability of a finished product material is improved. The porous material has a good adsorption effect and is high in repeating utilization rate.

The invention relates to an oyster-shell soil conditioner, a preparation method thereof and application of the oyster-shell soil conditioner in rice planting. Step-wise high temperature calcination isconducted on oyster shells, wherein the step-wise high temperature calcination comprises two calcination temperatures: a first calcination temperature and a second calcination temperature, the firstcalcination temperature is 300-550 DEG C, and the second calcination temperature is 900-1200 DEG C. According to the oyster-shell soil conditioner, by adopting step-wise high temperature calcination,the effect of soil modification by oyster shell can be improved significantly, the content of effective cadmium in rice soil can be reduced, the pH value of the soil can be improved, and the content of cadmium in the rice can be reduced significantly.

The invention discloses an activated carbon material and a preparation method thereof and a supercapacitor, which belong to the technical field of electrode materials. The activated carbon material is prepared by taking blocky graphite as a raw material through heating the blocky graphite to 500-700 DEG C at a heating rate of 10-20 DEG C/min; carbonizing the blocky graphite, and heating the blocky graphite to 700-900 DEG C at a heating rate of 0-20 DEG C/min; and feeding activation gas for activating the obtained object, so that an activated carbon material with large specific surface area, large total pore volume and high porosity is obtained. Because the blocky graphite is taken as a raw material, the activated carbon material is wide in source and low in price, thereby saving cost. The preparation method disclosed by the invention is mild in activation conditions, small in energy consumption, environmentally friendly, easy to operate, wide in raw material sources, low in cost, and suitable for large-scale industrial production. The supercapacitor disclosed by the invention takes the activated carbon material prepared according to the invention as an electrode material, so that the specific capacitance and charge-discharge cycle performance of the supercapacitor are improved, and the requirements of the supercapacitor on high specific capacitance and excellent large current properties are met.

The invention provides a rigid porous framework polymer with gas adsorption performance. A monomer is triaryl tricyano imidazole of R substitution, and R is hydrogen or alkyl with 1-5 carbon atoms. The invention provides a preparation method of the porous polymer and application of the porous framework polymer to the field such as oxygen reduction, hydrogen storage, adsorption and separation. The porous polymer materials have high nitrogen content and a micro-pore structure, the contact area between gas and the polymer is greatly increased, adsorption efficiency is improved, and the rigid porous framework polymer has good oxygen reduction performance under the carbon-forming condition and has good application prospects in the field such as oxygen reduction, hydrogen storage, adsorption and separation.

The invention provides an environment-friendly ceramic tile. The environment-friendly ceramic tile is prepared from components in parts by weight as follows: 60-80 parts of diatomaceous earth, 5-10 parts of pyrophyllite, 1-5 parts of ball clay, 3-9 parts of spodumene, 5-10 parts of albite and 2-5 parts of talc. The environment-friendly ceramic tile is light in mass and high in structural strength and has functions of dehumidification, deodorization, indoor air purification and the like; with the adoption of a manufacturing method of the environment-friendly ceramic tile, the best structural strength and the best cellular structure of the ceramic tile can be guaranteed.

The invention relates to a polyurethane foam base adhesive tape and belongs to the technical field of adhesive tapes. The polyurethane foam base adhesive tape comprises a polyurethane foam base plate, a glue coating and a release film. The polyurethane foam base plate comprises, by weight, 100 parts of polyester polyol, 11.5-28.3 parts of diisocyanate, 8-12 parts of a chain extender, 5-13 parts of a cross-linking agent, 1.0-2.5 parts of a light stabilizing agent and 5-11 parts of mesoporous nano-TiO2. The polyurethane foam base adhesive tape has high strength, good toughness, good impact resistance and small thickness and can be used for precision apparatus manufacture. The mesoporous nano-TiO2 heterogeneous nucleation effects improve a polyurethane foam base plate microporous structure and improve strength, toughness and shock resistance. Supercritical CO2 is used for polyurethane foam base plate foaming so that safety and environmental friendliness are obtained. The foam has uniform and fine pores. The polyurethane foam has any thickness and is suitable in different fields.

The invention belongs to the technical field of lithium ion batteries, and relates to an ultrafine diamond coated diaphragm, a preparation method thereof, and a lithium ion battery using the diaphragm. The ultrafine diamond coated diaphragm is prepared through the following steps: coating a base film with a slurry, and drying the coated base film, wherein the slurry contains, by mass, 65-85% of ultrafine diamond micro-powder and am inorganic filler, 10-25% of a filler and 3-15% of glue; and the mass of the ultrafine diamond micro-powder is 0.5-100% of the total mass of the ultrafine diamond micro-powder and the inorganic filler. The diaphragm makes micron-sized diamond crystal particles uniformly dispersed on the surface of the base film, so the micro-porous structure of the diaphragm is effectively strengthened, and the heat shrinkage resistance and the puncture strength are improved. The lithium ion battery using the diaphragm improves the transfer state of lithium ions in an electrode sheet interface, inhibits the lithium ions from accumulating into lithium element dendrite after the lithium battery is repeatedly circulated, and improves the safety and the cycle performances ofthe battery.