80results about How to "Adjust dosage" patented technology

The invention belongs to the technical field of high polymer material, relating to a method for preparing nanofiber containing a polymer pore structure, wherein the pore structure is formed on the fiber by a chemical reaction foaming method. The method comprises the following steps of: dispersing the inorganic salt, capable of discharging gas by reaction, in polymer solution, preparing super fine nanofiber by a high pressure static spinning method, immerging the obtained fiber in reaction solution, reacting the inorganic salt in the fiber, discharging the gas, and forming the pore structure on the fiber. The method has the advantages of obtaining the pore structure-containing nanofiber with controllable aperture number and uniform distribution, greatly increasing the specific surface area of the nanofiber and widening the application range of the nanofiber prepared by the electric spinning method. The prepared fiber has high application value in releasing medicine, carrier of catalyst, filtering absorbing material and the like. The method of the invention is wide in application range and can be directly applied to preparing the pore structure-containing nanofiber of a plurality of materials such as PS (polystyrene), PMMA (polymethyl methacrylate), PU (polyurethane), etc.

The invention relates to a polypyrrole/organic montmorillonite nano-composite, using polypyrrolidone to make organic intercalation modification on sodium-base montmorillonite, then using water as medium, and on the condition of blending agent, using oxidant to make chemical polymerization reaction on the pyrrole monomers between organic modified montmorillonite interlayers so as to obtain it. It can use as conductive additive of polyamide curing epoxy resin emulsion to make water-borne epoxy-series antistatic coating, sealant, adhesive, etc.

The invention relates to an ammoniation granulator and a compound fertilizer production technology by an amino acid method, aiming at solving the technical problems in the compound fertilizer production process that: biuret is easy to generate, the granulating effect is not good, the production efficiency is low and the energy consumption is high. An amino acid distributor of the ammoniation granulator is respectively and independently arranged, an amino spraying branch pipe provided with an inclined plane spout has an angle of 30 to 60 degrees with a vertical line on the cross section of a cylinder, the rotating directions of the inclined plane spout and the cylinder are consistent; the spout of an acid spraying branch pipe is correspondingly arranged in the opening direction of the inclined spout of the amino spraying branch pipe; and when ammoniation granulating, the granulator sprays liquid ammonia in a material layer with the pressure of 0.5 to 1.0MPa through the amino distributor, an acid distributor sprays sulphuric acid of 50 to 70 percent in the material layer with the pressure of 0.2 to 0.5Mpa, and each ton of solid material is injected with 15 to 25kg of liquid ammonia and 16.8 to 39.2kg of dilute sulphuric acid. The invention is applied in various raw materials and suitable for the scale production of various compound fertilizers; and the finished products have perfectly round and solid particles, are water resistant and movement resistant and not easy to be crushed and agglomerated.

The invention relates to a method for preparing biodegradable polyester. Firstly, melt polycondensation is conducted through diol and dicarboxylic acid and a low molecular weight polyester prepolymer with number average molecular weight between 2, 000 and 20, 000 or intrinsic viscosity below 0.64dL/g is prepared; binary oxadiazoline and diacyl bis-caprolactamate are combined to extend chain, and chain extension is carried out at a certain temperature; and the biodegradable polyester is obtained. The number average molecular weight of polybutylene adipate (PBA) can reach up to 39, 000 and the intrinsic viscosity to 1.13dL/g. For poly (butylene succinate) (PBS) with relatively high melting point, the intrinsic viscosity after chain extension is up to 0.99dL/g.

The invention relates to a low-toxicity mannich base compound for preparing an acidizing corrosion inhibitor. A molecular formula of the compound is shown in the specification. The invention also relates to a mannich acidizing corrosion inhibitor prepared by using the mannich base compound, and further relates to a mannich synergistic acidification corrosion inhibitor formed by the mannich acidizing corrosion inhibitor and a halide ion synergist in a compounding manner. In addition, the invention relates to a preparation method of the mannich acidizing corrosion inhibitor. A formula of the mannich acidizing corrosion inhibitor is prepared from a main mannich acidizing corrosion inhibitor, an organic solvent, a surfactant, a corrosion additive and a solvent in the compounding manner. The invention further relates to a method for preparing the mannich synergistic acidification corrosion inhibitor by using the method. By adopting the mannich base compound, the acidizing corrosion inhibitor and the preparation method thereof, the problems that the corrosion inhibitor product in the prior art is serious in pollution, high in cost, and unstable in performance are solved.

The invention discloses a rubber tire tread and a milling process thereof. The rubber tire tread comprises the following components in parts by weight: 70-110 parts of natural rubber, 0-15 parts of styrene-butadiene rubber, 5-20 parts of tread rubber powder, 1.5-2.5 parts of stearic acid, 1-2 parts of sulfur powder, 2-18 parts of white carbon black, 12-15 parts of carbon block, 2-30 parts of aromatic oil, 1-8 parts of zinc oxide, 4-7 parts of an anti-aging agent, 1-4 parts of pine tar, 1-4 parts of an accelerating agent, 0.2-1 part of an anti-reversion agent and 2-5 parts of a binding agent. A three-section milling process is adopted, and the milling process can improve the abrasive resistance, tear resistance and chunking and chipping resistance of the tire tread.

The invention discloses a method for preparing linked polymer coil with particle size in bimodal distribution, comprises: dissolving surfactant oil-soluble initiator in base oil to produce oil phase; dissolving functional water-soluble monomer, normal water-soluble monomer in water to produce aqueous phase; mixing aqueous phase and oil phase to carry out emulsification, therefore stable suspended liquid of W/O type is obtained; initiating polymerization in such suspended liquid at a predetermined initiating temperature. The inventive method obtains linked polymer coil with particle size in bimodal distribution finally by controlling mass fraction of emulsifying agent between mass fraction needed for preparing microemulsion and emulsion. Advantages of the invention is that it is possible to regulate magnitude of two peaks and relative content of corresponding coil properly, to make the linked polymer coil more suitable for waterflooding reservoir with non-uniform porous media.

The invention relates to an environmentally-friendly cross-linked acrylate polymer emulsion and a preparation method thereof. The emulsion consists of six main components through semicontinuous seeded emulsion polymerization, is fine and smooth in appearance and is a blue-fluorescent semitransparent emulsion, a pH value is 7.5+/-0.5, the solid content is 30-50%, the emulsion particle diameter is 50-100 nanometers, and the polymer emulsion has good film-forming property and adhesion after film forming at the 80 DEG C temperature. The environmentally-friendly cross-linked acrylate polymer emulsion has the advantages that due to the fact that an amino acid based anionic surface active agent and an alkyl polyglucoside non-ionic surface active agent both have excellent biodegradability and environmental protection effect and are used for replacing commonly-used alkylphenol polyoxyethylene ether and an alkylbenzene sulfonate surface active agent having poor biodegradability, the environmentally-friendly cross-linked acrylate polymer emulsion is more environmentally-friendly, and the demand for the performances of the emulsion is met.

A dripping pill of levamlodipine besylate for treating hypertension and angina pectoris is prepared from levamlodipine besylate and matrix. Its preparing process is also disclosed.

The invention belongs to the technical field of artificial cornea production and more particularly provides an active regenerating artificial cornea implant and a preparation method thereof. The artificial cornea implant comprises 5-30 shares of chitosan, 5-30 shares of collagen, 0.1-0.5 share of chondroitin-sulfuric acid, 5-10 shares of polyethylene glycol, 5-25 shares of polyvinyl alcohol and 15-80 shares of triple-distilled water; preferably the artificial cornea implant also comprises appropriate amount of cornea cell growing factor, fibronectin and laminin. The preparation method of the active regenerating artificial cornea implant is as below: dissolving the chitosan, the collagen and the chondroitin-sulfuric acid in hydrochloric acid, acetic acid and water respectively, and then infusing the mixture of the components which are agitated uniformly at the room temperature into a mould for drying, and then obtaining the product after water immersion, cleaning and drying. The artificial cornea implant has good biocompatibility, high substance rigidity and good transparency; the preparation method is easy to be operated, the raw materials are easy to be obtained and are cheap, and large-scale industrialized production can be performed.

The invention relates to a cefuroxime axetil capsule in a non-gel state in water and a preparation method of the cefuroxime axetil capsule, and belongs to the technical field of medicinal preparation. The cefuroxime axetil capsule comprises the following raw materials and auxiliary materials in percentage by weight: 55-70 percent of cefuroxime axetil, 1-3 percent of micro-powder silica gel, 1-3 percent of gel-resistant auxiliaries, 15-30 percent of disintegrating agents and 5-20 percent of filling agents. The gel-resistant auxiliaries can be stearic acid and/or talcum powder. By using a dry granulating method, a problem of low dissolution rate resulted from the serious gelation phenomenon caused by dissolving the cefuroxime axetil capsule out of water in the prior art is avoided, so that the prepared capsule is good in dispersibility and hydrophily when being dissolved out, the gelation phenomenon is avoided, and the dissolution rate is greatly improved.

The invention relates to a bearing tooth surface lubricating device for a wind generating set. The bearing tooth surface lubricating device for the wind generating set is used for lubricating the engaged position of a variable paddle and a yaw gear ring, installed on a driving gear and rotates along with the driving gear. An oil distributing disk is connected to a fixed support through a shaft, the shaft is fixedly connected with the fixed support through a flat key, and a spring is installed between the boss end face of the shaft and the fixed support. The oil distributing disk can rotate around the shaft and a bronze bushing. Oil smearing sticks are evenly distributed on the lower end face of the oil distributing disk, the oil smearing sticks are fixedly connected with the oil distributing disk in a sealed mode, and the quantity of the oil smearing sticks is equal to the tooth quantity of the driving gear. The oil smearing sticks are placed at the tooth roots of the driving gear, and the lower end face of the oil distributing disk is connected with the upper end face of the driving gear in a pressed and contacting mode. A set of oil outflow holes are formed in the side of each oil smearing stick located at the engaged position of the driving gear and a bearing gear, the set of oil outflow holes are enlarged in sequence from up to down, and the oil outflow holes release oil only from the direction of the engaged position of the driving gear and the bearing gear. The set of oil outflow holes are connected with a fixed-point centralized lubrication system of the tooth surface of the variable paddle through a connecting joint.

The invention discloses a synchronous denitrification and dephosphorization adsorbent as well as a preparation method and application thereof, and belongs to the field of waste water treatment. The synchronous denitrification and dephosphorization adsorbent disclosed by the invention relates to in-situ treatment of domestic sewage and eutrophication water bodies, and comprises a calcined product of magnesite stone powder and zeolite powder. The synchronous denitrification and dephosphorization adsorbent is made through the following steps of (1) crushing magnesite stone ore, performing screening, and performing high temperature calcination so as to obtain the calcined product; and crushing zeolite, grinding the crushed zeolite, and screening the ground zeolite with a 100-mesh sieve so as to obtain the zeolite powder; and (2) mixing the calcined product with the zeolite powder, performing synthesis by a hydrothermal method, then performing cooling, and performing centrifugal filtration so as to obtain a synthetic product namely the synchronous denitrification and dephosphorization adsorbent. The synchronous denitrification and dephosphorization adsorbent and the preparation method thereof disclosed by the invention can be applied to the in-situ treatment of waste water containing ammonia nitrogen and phosphate, such as the domestic sewage, chemical industry waste water and eutrophication watercourse water bodies.

The invention relates to an improved method for preparing a cefprozil dimethyl formamide (DMF) solvate; the method comprises the following steps of: taking a 7-APCA-guanidine salt shown by the formula IV and a mixed anhydride shown by the formula VI as raw materials to carry out a condensation reaction under alkaline conditions, hydrolyzing reaction liquid in the presence of acids, separating the liquid, adding DMF to a water phase, and regulating a pH value with an alkaline to obtain the cefprozil DMF solvate shown by the formula I. The method of the invention avoids the usage of silanizing reagent with expensive cost and instability, improves yield greatly and reduces production cost to form a more economic and efficient preparation technology, wherein X+ and R6 are defined according to claim 1.

The invention discloses a calcium-based adsorbent for defluorination and an application thereof and belongs to the field of wastewater treatment. Dolomite and coal ash are taken as raw materials and are compounded into the calcium-based adsorbent for defluorination, provided by the invention, according to a hydrothermal method. The application steps are as follows: (1) compounding calcined products of dolomite dust with the coal ash at the compounding temperature of 170-200 DEG C for 6h, so as to obtain the calcium-based adsorbent; and (2) adding the calcium-based adsorbent into wastewater at the dosage of 1.25-25g/L, magnetically stirring for 10min-30min, precipitating or centrifuging, and then separating solid from water. The calcium-based adsorbent for defluorination can effectively absorb fluorine pollutants under a low pH condition, and has physical and chemical absorption effects. The effluent meets GB8978-1996 class-1 emission standard.

The invention discloses an integrated measuring device for algae population biomass in lake and reservoir shallow-water areas. The device comprises a working panel which is arranged on a water surface, an underwater working box, an operating assembly, power assemblies, a measuring assembly and an identifying assembly, wherein the operating assembly is arranged on the working panel; the power assemblies are arranged in the working panel and the underwater working box; the measuring assembly which is measuring an algae content and the identifying assembly which is used for measuring an algae species are arranged in the underwater working box; the power assemblies, the measuring assembly and the identifying assembly are controlled by virtue of the operating assembly; the measuring assembly and the identifying assembly are driven to move by virtue of the power assemblies; and by virtue of the measuring assembly and the identifying assembly, measured data is returned to the operating assembly. The device provided by he invention, by virtue of magnetic algae and rotary settlement technologies, can achieve real-time vertical measurement of the algae population biomass in the lake and reservoir shallow-water areas, so that the algae biomass in the water areas as well as the constitution and proportions of an algae population can be accurately and continuously acquired in real time; and meanwhile, the vertical distribution of algae in water can be measured by virtue of the device which vertically moves in the water, so that a new way is created for the in-situ vertical measurement of the algae biomass in the water.

The invention discloses a preparation method of a metal-based carbon nanotube reinforced composite material, and belongs to the field of preparation of metal-based composite materials. The method uses a series of process flows for uniformly dispersing carbon nanotubes and metal particles to obtain the metal-based carbon nanotube reinforced composite material. The method comprises the following specific steps: (1) the metal particles and the carbon nanotubes are mixed; (2) the ball grinding is performed for metal particle and carbon nanotube mixed slurry; (3) the metal particle and carbon nanotube mixed slurry is dried; (4) the ball grinding is performed for metal particle and carbon nanotube dried powder; and (5) metal-based carbon nanotube reinforced composite powder is molded through extruding. The method has such characteristics as simple preparation process, environmental protection and possession of large-scale application potential, and is suitable for such fields as aerospace and vehicle manufacturing having the high-mass and high-strength material demands.

A barrel washing machine with a washing agent feeder comprises a frame, an outer barrel, a washing barrel coaxial with the outer barrel, and a washing agent feeder on a panel control disc, wherein the feeder comprises a diverting groove, a washing agent box and a filling groove, while the washing agent box is sliding arranged in a mounting chamber formed by the diverting groove and the filling groove along the front and back direction of the washing machine, while the box is divided into a plurality of sub boxes which inner walls are arranged with scales. The invention arranges scales on the washing agent box, to adjust the washing agent consumption according to the clothes and washing agent type.

The invention relates to a novel renewable fish tank sterilizing and oxygen-releasing bag; the novel renewable fish tank sterilizing and oxygen-releasing bag is designed by taking a silver phosphate nano-powder material having high quantum yield as a main raw material; nano-silver and oxygen can be generated under the irradiation of visible light; with the assistance of swimming of fishes, water is sufficiently contacted with sterilization components, so that sterilization of water quality is realized; furthermore, oxygen can also be released; because of being constrained in a semipermeable membrane, nano-silver generated by photolysis cannot be lost in a fish tank; silver phosphate has the excellent characteristics of softening water quality, dispersing dirt, buffering an alkaline agent, preventing from caking and the like; silver phosphate can be reacted with amine substances in fish feces, so that phosphate is generated; and therefore, nutrients are provided for aquatic plants in the fish tank. After being used for a certain time, the sterilizing and oxygen-releasing bag can be taken out and is renewable in hydrogen peroxide, so that the sterilizing and oxygen-releasing function is obtained again.

The invention discloses a degradable and resorbable porous magnesium compound biological factor cross pin for tissue engineering. The cross pin comprises a body which is cylindrical or rhombic magnesium alloy (1), part of the body (1) is provided with a plurality of porous regions used for containing biological factors with bone growth promoting or tendon differentiation effect, one end of the body is sharp and beneficial to cross transplantation of tendons in operation, and a host material of the body is magnesium or magnesium alloy and is subjected to surface modification. The cross pin can improve integration capability between the transplanted tendon and a bone tunnel to stimulate bone growth or induce bone mesenchymal stem cells (BMSC) in the bone tunnel to form tendon differentiation, and the process of tendon-bone healing is accelerated.

The invention relates to an improved intravenously dripped multi-vitamin injection. The injection can be mixed with high-calorie parenteral nutrients to be dissolved and adjusted to have isotonicity and isostension and then can be administrated through peripheral intravenous drip, wherein the intravenously dripping time is 6 to 12 hours; and dripping is performed at constant speed and for one time per day.

The invention discloses an automatic additive adding device for mining concrete wet spraying. The automatic additive adding device comprises a concrete injection pipe, and a wet spraying machine nozzle is arranged at the front end of the concrete injection pipe. The adding device is provided with an adding trough communicated with a pressure feeding machine, the pressure feeding machine is communicated with an adding pump, the adding pump is communicated with the concrete injection pipe through a communication pipe, and the communication point of the communication pipe and the concrete injection pipe is located behind the wet spraying machine nozzle. An additive is put into the adding trough, the flow speed of concrete can be automatically sensed through a corresponding sensor, a flow speed signal is transmitted to a dosage controller, the dosage controller transmits a dosage adding signal to a dosage regulator, the dosage regulator regulates the dosage of the additive added from the adding trough, the additive is fed through the pressure feeding machine in a pressing mode and enters the wet spraying machine nozzle from the additive pump, and thus the dosage of the additive can be effectively and automatically regulated; in addition, pipe jamming can be effectively monitored, and the working effect and safety are greatly improved.

The invention provides polymer mortar and a preparation method thereof. The polymer mortar comprises the following raw material components in parts by weight: 90-100 parts of rapid hardening sulphoaluminate cement, 35-45 parts of a polymer emulsion, 2-3 parts of superfine powder, 5-10 parts of gypsum powder, 5-10 parts of an expanding agent, 190-210 parts of sand, 30-40 parts of water, 0.5-1.0 part of a powder water reducing agent, 0.5-1.0 part of polymer fiber, 0-0.05 part of a hardening accelerator, 0-0.05 part of a retarder and 0.3-0.8 part of a defoaming agent. The method comprises the following steps: preparing a dry powder material, preparing a pre-dispersed emulsion, adding the dry powder material, the pre-dispersed emulsion, the water and the defoaming agent into a stirrer, and mixing and stirring for 1-3 minutes to a uniform state, thereby obtaining the polymer mortar. The polymer mortar can meet the construction requirements of the filling layer of a CRTS II type slab ballastless track.