162results about How to "Many gaps" patented technology

An adjustable implantable annuloplasty apparatus suited for post-implantation adjustments according to changing needs of the patient. The apparatus comprises a ring shaped main body, and a designated adjustment section extending from the main body. The main body and designated adjustment section of a deployed apparatus are fully contained within a 5 cm diameter. Optionally, the apparatus is mechanically adjusted in a minimally invasive procedure, for example by engaging the designated adjustment section using a balloon catheter. Optionally, the apparatus is adjusted at least one month post implantation.

Compounds of Formula (I): (formula (I)) where: X₁ and X2 are the same or different and each is independently Cl, Br, I, a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group; and, Y is O, S, Se, NR₁, R₁C—CR₂ or R₁C═CR₂, wherein R₁ and R2 are the same or different and are each independently H or an organic group, are useful as monomers to produce oligomers or polymers that are useful in organic electronic devices.

The invention relates to a method for preparing pure-phase gamma-AlON transparent ceramic powder by carbothermal reduction of gamma-Al2O3, and belongs to the field of preparation of transparent ceramic materials. According to the preparation method, nano-alpha-Al2O3 and activated carbon are taken as raw materials; powder is filled in a graphite crucible loosely, wherein an aluminum oxide plate is paved at the bottom of the graphite crucible; an air hole which penetrates through the powder is preformed at the aluminum oxide plate; a graphite cover provided with fine and dense air holes is used for covering the hole; the pure-phase gamma-AlON transparent ceramic powder is prepared by adopting a two-step heating process in a flowing nitrogen environment with a micro positive pressure. By the adoption of the preparation method, the vacuumizing difficulty can be effectively reduced, powder is prevented from scattering in a vacuumizing stage, the time required for discharging adsorbed gas can be greatly shortened, the vacuumizing speed is high, and the preparation efficiency of the gamma-AlON powder is greatly improved; the obtained gamma-AlON powder phase has stable and reliable compositions and can be used for pressure-less sintering preparation of AlON transparent ceramics with high transmittance; the process is simple and is easy to operate, and is suitable for industrial production.

The invention discloses a bulk blended yarn and a production method thereof. The bulk blended yarn is a staple fiber yarn having a skin core structure, wherein the staple fiber yarn is obtained by removing water-soluble polyvinyl alcohol fibers through dissolving, and the staple fiber yarn is formed by at least high shrinkage staple fibers and common staple fibers; meanwhile, the filling power of the bulk blended yarn is up to 90 % and more. The obtained bulk blended yarn is characterized in light weight and warm-keeping; the filling power is stable and durable; the bulk blended yarn is suitable for making sweaters, underwear, blankets, and the like.

The invention relates to an electric core of a secondary lithium battery and a preparation method thereof. The preparation method comprises the following steps: electrode mixed materials which are used in the secondary lithium battery are prepared, and the electrode mixed materials comprise the following materials by weight percentages: a. 30-97.9% of anode/cathode active materials; b. 1-40% of a solvent; c. 1-10% of a binding agent; and d. the rest of conductive additive; and the materials are mixed evenly; a produced current collector needed by the anode/cathode and the electrode combined materials of the anode/cathode are put in a mould, the electrode combined materials are evenly pressed on a surface of the anode/cathode current collector, or evenly pressed on two surfaces of the anode/cathode current collector, or evenly pressed on the periphery of the anode/cathode current collector by an extrusion process, and the electrode of the secondary lithium battery having an inner lining or simultaneously having an inner lining and an outer lining is obtained by heating and drying treatment. The method provides electrode shapes required by batteries with various shapes, and the thickness and the density of a pole piece can be made according to the design by a compaction process, therefore the energy density of the battery is improved.

The invention relates to a preparation method of porous graphene and applications of finished product thereof. The preparation method comprises following steps: (1) ultrasonically dispersing graphene oxide in deionized water; (2) dissolving a certain amount of water-soluble transition metal salts in deionized water, dropwise adding the solution into the graphene oxide solution, and stirring at the same time; (3) subjecting the mixed solution to treatments of centrifugation and washing to extract products, drying the products for 1 to 20 hours; (4) putting the obtained materials into a tube-type furnace, heating, burning the materials at a constant temperature of 500 to 1050 DEG C for 1 to 20 hours, while controlling the flow speed of inert gas in the range of 10 to 300 mL/min, cooling, and collecting the solid products; (5) processing the solid products with dilute hydrochloric acid to remove the transition metal oxides in the solid products so as to obtain the porous graphene material. The porous graphene material prepared by the method has the advantages of few layers and controllable hole size, and solves the problems of non-conductivity of electrons in the vertical direction to the horizontal surface of the graphite material multi-layer graphene and obstructed route of Li. Furthermore, the construction of nano micro-hole structure is beneficial for storage, diffusion, and transportation of charges.

The invention discloses a cigarette filter tip composite material, which is characterized by consisting of the following components in percentage by mass: 30 to 90 percent of polylactic acid fibers and 10 to 70 percent of cellulose acetate fibers which form a network structure through splitting and physical entanglement and the adhesion of surface points. The invention also discloses a method for preparing the cigarette filter tip composite material. The polylactic acid fibers selected by the invention have the advantages of abundant sources, low cost and good processability, and the polylactic acid fibers are used to replace part of the cellulose acetate fibers and are used as the cigarette filter tip composite material, so that the production cost of cigarette filter tips can be reduced greatly, the production efficiency is improved, and the problems of environmental contamination, resource shortage, high cost and the like which are caused by the production of the cellulose acetate fibers are reduced. The preparation method provided by the invention has the advantages of simple and mature process and easy operation.

The invention provides a sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere and a preparing method thereof. The preparing method comprises the following steps of: mixing cobalt dichloride water solution with glycerol, adding urea into the mixture, reacting, removing impurities, burning, and obtaining the sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere. According to the sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere prepared by the method, the horsehide-shaped hiberarchy has abundant gaps, a large amount of pore ways of which the inner parts are communicated and a larger specific surface area, thus a lot of novel physicochemical characteristics which are generated in a coupling way can be owned, and the sea-urchin-shaped hiberarchy cobaltosic oxide nanosphere can be widely applied to the fields of electrochemistry, catalysis, biosensing, air-sensitive and magnetic materials.

The invention discloses a method for controlling fruit cracking of jujube trees in fields, and relates to the field of technologies for planting jujube trees. The method includes (1), carrying out cultivation management; (2), regulating and controlling nutrient elements; (3), regulating and controlling bioactive substances. The method has the advantages that varieties are selected, the field management is carried out, the nutrient elements and the bioactive substances are regulated and controlled, and accordingly the fruit cracking rate of the jujube trees in the fields can be lowered and controlled by the aid of the method.

The invention discloses closed mesoporous silicon oxide and a preparation method of same. The preparation method comprises the steps of treating dry mesoporous silicon oxide with polychlorinated silane to prepare mesoporous silicon oxide containing chlorine groups on the surface; reacting the mesoporous silicon oxide containing the chlorine groups on the surface with polyhedral silsesquioxanes and polychlorinated silane to obtain a crude product; and after washing and drying, conducting calcination at the temperature of 230-300 DEG C, thereby obtaining the closed mesoporous silicon oxide. A coating layer is formed at the outer surface and the mesopores of the mesoporous silicon oxide by polyhedron silsesquioxane and mutual connection is realized through a Si-O bond or Si-N bond. The inner pores of the mesoporous silicon oxide are kept; besides, the mesopores of the mesoporous silicon oxide are closed by polyhedron silsesquioxane, and a larger specific surface area and more pores are obtained, so that the dielectric constant of the materials is lowered and the adsorptive property of the mesoporous silicon oxide is improved and the method provided by the invention ensures that the advantages of the mesoporous silicon oxide in preparing materials with low dielectric constant are brought into full play.

The invention discloses a super absorbent dust-free wiping cloth and a manufacturing method thereof. The wiping cloth is formed by interweaving warps and wefts and is characterized in that the dust-free wiping cloth is formed by circularly arranging square concave weave repeat units formed by interweaving the warps and the wefts along the warp direction and the weft direction respectively; at least one of the warp and the weft is formed by superfine fiber filaments; and in one weave repeat unit, the warps and the wefts are respectively arranged stepwise and upward in sequence from the central lowest point, and the floating length of the adjacent warps and the adjacent wefts on the steps increases in sequence to form concavo-convex patterns which are piled up alternately from low to high and have four high sides and low middle. The manufacturing method comprises the steps of beaming, drafting and reeding, weaving, weight reducing, tenter setting, laser cutting and packaging, thereby obtaining the super absorbent dust-free wiping cloth. The super absorbent dust-free wiping cloth has soft handfeel, good wiping effect and super absorbency and can be used in a dust-free room with a higher cleanliness requirement. The manufacturing method is simple and can be used for manufacturing the high-quality dust-free wiping cloth.

The invention discloses composite and efficient oil-water-separation filter paper for a hydraulic filter. The composite and efficient oil-water-separation filter paper is prepared by, by weight, 50-55 parts of 3-5mm alkali-free superfine glass fiber, 55-60 parts of bleached softwood pulp, an appropriate amount of distilled water, 0.8-1 part of anionic polyacrylamide, an appropriate amount of concentrated sulfuric acid with the concentration being 98wt%, 10-12 parts of nano titanium dioxide, 20-25 parts of ferroferric oxide colloidal solution with the solid content being 30%, an appropriate amount of anhydrous ethanol, 60-65 parts of fluoro-silicon emulsion with the solid content being 40wt%, 1-1.2 parts of alkenyl succinic anhydride, 7-8 parts of sisal fiber, 3-4 parts of waste rubber powder, 0.9-1.1 parts of silane coupling agent kh550, 1.5-2 parts of organic silicon emulsion and 2-3 parts of urea. By the scientific and reasonable component proportion, the composite and efficient oil-water-separation filter paper is good in absorbability, good in hydrophobic and oleophylic performance and capable of efficiently separating oil and water. When the filter paper is applied to the hydraulic filter, hydraulic equipment can be well protected.

The invention discloses toothpaste for eliminating bad breath, and relates to the technical field of toothpaste. The toothpaste comprises the following ingredients: 13-50% of a friction agent, 20-65% of a humectant, 2.0-2.2% of a foaming agent, 1.2-1.5% of a thickening agent, 3-8% of modified bamboo charcoal, 1-5% of bamboo vinegar, 0.3% of sodium saccharin, 0.15% of enhanceparaben, 0.15-0.3% of sodium pyrophosphate, 1.0-1.2% of edible essence and the balance of deionized water. Compared with conventional toothpaste, the toothpaste has the functions of improving the degree of fresh breath and prolonging the time for fresh breath.

The invention discloses a preparation process of a novel aluminum alloy anodic oxidation film. The preparation process comprises the steps that S01, degreasing treatment is conducted; S02, chemical polishing treatment is conducted; S03, corrosive wash is conducted, specifically, an aluminum profile after being subjected to degreasing is placed in circularly flowing corrosive wash liquid for corrosive wash; S04, washing is conducted; S05, anodic oxidation treatment is conducted; S06, coloring is conducted, specifically, an aluminum alloy treated through the S04 step is washed until the surfacehas no residue, drying is conducted, and color paste is screen-printed on the anodic oxidation film of the aluminum alloy; and S07, hole sealing is conducted, specifically, the surface of the aluminumalloy is rinsed by using 50-55 DEG C of water, and hole sealing treatment is conducted in 100-102 DEG C of water steam. The preparation process of the novel aluminum alloy anodic oxidation film adopts a sulfuric acid anode oxidation method, supplemented with matched components and methods, the prepared aluminum alloy anodic oxidation film has natural fragrance, and added value of the aluminum alloy anodic oxidation film is promoted. Further, the anodic oxidation film prepared through the anodic oxidation process has high hardness, many gaps and high adsorption capability, is beneficial for dyeing, and has high corrosion resistance after being subjected to sealing treatment.

Disclosed are nano-manganese dioxide for removing underground water heavy metal pollution and a preparation method of the nano-manganese dioxide for removing underground water heavy metal pollution. The preparation method includes the steps of 1), inoculating one or more of Leptothrix discophora SS-1, Pseudomonas putida MnB1 and Bacillus sp SG-1 to a microbial growth medium and culturing at 25-30 DEG C; 2), centrifuging a mixture obtained in the step 1 to obtain a bacterial body and cleaning and precipitating the bacterial body; 3), inoculating the bacterial body obtained in the step 2 to a manganite culture medium and culturing at 25-30 DEG C; 4), adding MnCl2 and Na3VO4 into a product obtained in the step 3 and culturing at 28-30 DEG C so as to obtain black precipitate, namely the nano-manganese dioxide.

The invention discloses a dense low-resistance super capacitor diaphragm material which comprises the following raw materials, by weight, 100 parts of matrix fibers, 15 to 20 parts of polyvinylidene fluoride fibers, 25 to 30 parts of acetone, 100 to 110 parts of dimethylacetamide, 10 to 20 parts of ceramic fiber, 10 to 20 parts of SAF superabsorbent fiber, 1 to 2 parts of zinc oxide, 2 to 4 parts of cationic starch and 5 to 15 parts of vinyl acetate emulsion. The invention also discloses a preparation method of the dense low-resistance super capacitor diaphragm material. In the invention, the polyvinylidene fluoride fiber is firstly subjected to spinning to obtain a spinning diaphragm with a thickness of 6-8 [mu]m, and then the matrix fiber is made into a non-woven fabric by a wet nonwoven fabric process, and the two are combined via a heat-pressing manner to be produced into the dense low-resistance super capacitor diaphragm material.

The invention belongs to the technical field of functional material preparation and relates to a preparation method of a manganese sesquioxide hierarchical-structure material. The method comprises the following steps: dropwise adding a soluble manganese salt aqueous solution into an oxalic acid aqueous solution; reacting at constant temperature under a stirring condition until precursor precipitate is generated; and after the reaction is over, filtering, washing, drying and calcining to obtain the manganese sesquioxide hierarchical-structure material. The product is a flaky hierarchical-structure material formed by assembling a large quantity of manganese oxide nano particles. The flake size is 10-20mu m, and the size of the manganese oxide nano particles is 20-30nm. With low preparation cost and easiness in operation control, the technology has relatively high production efficiency and can realize industrial mass production. The manganese sesquioxide hierarchical-structure material prepared by the preparation method is used as an electrode material and has relatively high specific capacitance and good cycle performance.

The invention belongs to the field of preparation of inorganic nonmetallic materials, and particularly relates to a preparation method of a copper cobaltate porous microrod and nickel foam composite electrode material. The preparation method comprises the steps that clean nickel foam is soaked in an oxalic acid aqueous solution, and a mixed aqueous solution of soluble copper salt and soluble cobalt salt is dropwise added into the oxalic acid aqueous solution under the condition of stirring at room temperature; stirring reaction is conducted till micron-structure precursors grow out on the surface of the nickel foam, the nickel foam is taken out, cleaning, drying and calcining are sequentially conducted, and the copper cobaltate porous microrod and nickel foam composite electrode material is obtained. According to the preparation method of the copper cobaltate porous microrod and nickel foam composite electrode material, the technology is simple and easy to carry out, the product purity is high, the preparation cost is low, the diameter of a copper cobaltate microrod ranges from 0.5 micrometer to 2 micrometers, the length of the copper cobaltate microrod is about 5-10 micrometers, the size of a nano pore channel ranges from 10 nm to 50 nm, the uniformity and the dispersity of the product are both good, the copper cobaltate porous microrod and nickel foam composite electrode material can be directly applied to electrode materials of supercapacitors, the production technology is simple, and the preparation method is prone to be applied to practical large-scale production.

The invention discloses a modified thermosetting resin and a preparation method thereof. 100 parts of heat curable resin and 0.1-100 parts of closed pore meso pore silicon oxide are uniformly mixed at the temperature of 30-180DEG C, and a modification thermosetting resin is obtained. The closed-pore mesoporous is prepared through the steps that: polyhedral silsesquioxane forms a coating on an external surface and apertures of meso pore silicon oxide, the closed-pore mesoporous silicon oxide is connected by Si-O key or Si-N key. The closed pore meso pore silicon oxide has a higher specific surface area comparing to the original closed-pore mesoporous silicon oxide, and simultaneously possesses more interfaces, which can avoid that the resin enters interfaces of inorganic materials, guaranteeing the modification thermosetting resin possesses a low dielectric property, and a stable performance. The preparation method for modified thermosetting resin disclosed in the invention has the characteristics of extensive applicability and simple operation.