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 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 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 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 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 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 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.