51results about How to "Structure control" patented technology

The invention provides a preparation method of alkali-proof vulcanized fluororubber. The preparation method includes steps of (1), adding water, emulsifiers and pH (potential of hydrogen) modifiers in a reactor; (2), adding polymerized monomers; (3), starting a stirring device, increasing temperature to be 70-120 DEG C, and adding initiators and chain transfer agents so as to start polymerization reaction; (4), adding residual polymerized monomers in batches, and stopping reaction after all the polymerized monomers are added so as to obtain polymerized emulsion; (5), coagulating, washing and drying the polymerized emulsion to obtain fluororubber; and (6), vulcanizing the fluororubber obtained in the step (5) so as to obtain the vulcanized fluororubber. The preparation method is simple in operation and requires mild reaction conditions. The structure of the fluororubber is controlled effectively by means of regulating structures of the monomers, changing reaction temperatures and the like, so that peroxide, namely the alkali-proof vulcanized fluororubber, is prepared. The prepared vulcanized fluororubber with high Mooney viscosity also has good curability and good oil resistance and can be applied to various industrial fields.

The invention belongs to the field of the preparation of metal powder and relates to a method for preparing spherical porous silver powder. The spherical porous silver powder is prepared by a method combining gas atomization powder preparation and de-alloying. The method comprises the following steps of: firstly, smelting pure metal silver and magnesium according to a certain proportion; secondly, atomizing alloy melt with gas to prepare spherical alloy powder; and finally, performing de-alloying on micro-powder in salt solution and washing and drying the de-alloyed micro-powder. In the method, spherical porous micro-powder is obtained by combining spray powdering and de-alloying, selected etchant solution is non-toxic and harmless neutral salt solution, operation process is simple and process is environmentally-friendly and suitable for industrial mass production. By the method, components of the alloy and a metal phase removing process can also be designed according to requirements on the porosity and specific surface area of a final product, so the structure, size and hole pattern of the porous silver powder are controlled.

The invention relates to a synthesis method of a low temperature-resistant perfluoroether rubber. The synthesis method comprises the following steps: 1) evenly mixing an emulsifier, fluoroether oil and water together and heating until 40 DEG C to form a microemulsion, and adding a comonomer A and a comonomer B to the microemulsion to obtain a mixed liquor; 2) adding deionized water and a pH regulator to a reaction kettle, adjusting the content of oxygen in the reaction kettle to be lower than 20ppm, increasing the temperature in the reaction kettle to the range of 70-120 DEG C, and adding the mixture of tetrafluoroethylene and perfluoromethyl vinyl ether to the reaction kettle; 3) adding the mixed liquor to the reaction kettle and adding the initiator potassium peroxodisulfate to start reacting, and adding a vulcanization point monomer and a chain transfer agent until the reaction ends, thereby obtaining a polymer; 4) performing electrolyte coagulation on the polymer and then washing, drying in vacuum and molding by plastifying to obtain the perfluoroether rubber. The synthesis method is simple to operate and mild in reaction conditions, and is capable of preparing the low-temperature-resistant perfluoroether rubber by adjusting the monomer structure.

The invention provides a method for preparing graphene. The method comprises the following steps: (A) carrying out a hydrothermal reaction on a surfactant, a carbon source and a metal catalyst in water to obtain an intermediate with a three-dimensional nano-structure; and (B) calacining the intermediate with the three-dimensional nano-structure obtained in the step (A) under a protective gas atmosphere to obtain graphene. According to the method, the product of a metal catalyst hydrothermal reaction has a three-dimensional nano-structure, is used as a template, and is uniformly mixed with the carbon source and the surfactant; by utilizing the amphipathy of the surfactant, the hydrophobic end of the surfactant is adsorbed on the hydrophobic part of the carbon source, and the hydrophilic end is adsorbed on the surface of the metal catalyst hydrothermal product, so that the carbon source can be uniformly distributed on the surface of the hydrothermal reaction product; the hydrothermal reaction product of the metal catalyst can be used as a structure support, and the aim of controlling the graphene structure is achieved by controlling the structure of the metal catalyst hydrothermal product.

The invention relates to a curcumin slow release agent and process for preparation, wherein the slow release agent employs anion stratified material of hydrotalcite as the main body, the curcumin anion having a intercalation hydrotalcite crystal structure of the intercalation foreign body with a chemical constitution of (M2+)1-x(M3+)x(OH)2(Cur)a(Bn-)b*mH2O, wherein M2+ is one selcted from Mg2+, Zn2+, Cu2+, Ni2+, Co2+, Mn2+, M3+ is selected from Al3+, Fe3+ and Cr3+, Cur is intercalation foreign body, Bn-is the inorganic anion with n charges, 0 A61K 9/00 A61K 9/22 A61K 9/52 A61K 47/02 A61K 31/122 A61P 3/06 A61P 29/00 A61P 35/00 A61P 39/06 2 11 3 2006/11/29 1969815 2007/5/30 000000000 Zhejiang University of Technology 310014 Ni Zheming Wang Ligeng Xing Fangfang Pan Guoxiang huangmei juan yuanmu ji 33201 The Patent Agency of Zhejiang Engineering Institute On the Campus of Zhejiang Engineering Institute, District 6 of Zhaohui, the City of Hangzhou 310014

The invention discloses a power grid network topology structure changing and parallel compensation device selecting method. The power grid network topology structure changing and parallel compensation device selecting method includes S1, grading input vectors; S2, simulating according to network structure parameters, load and small hydropower data, finding out the corresponding network structures and compensation modes of different running modes of a power distribution network, and obtaining several groups of training sets (X, Y) and testing sets (X', Y') of an extreme learning machine (ELM); S3, selecting the hidden layer node number combination Ls of ELM and a structural risk minimization rule constant set gamma s, and selecting an RBF function as an excitation function g(x); S4, training ELM, and testing to obtain the optimal L and gamma to obtain an optical network model of the ELM; S5, outputting the switch combination state with the minimum network loss. The power grid network topology structure changing and parallel compensation device selecting method reflects the nonlinear mapping relationship between input variable and output variable and generalization ability by the aid of ELM to build the network topology structure of which the varied load levels, small hydropower generating capacity and voltage meet demands and build the correspondence between parallel compensation modes.

The present invention relates to a supermolecular intercalation structure slow-released captopril and its preparation method. Said invention uses anionic lamellar material LDH as main body, uses captopril as intercalation guest, and utilizes two soluble metal salts to make them into a mixed salt solution, then makes said mixed salt solution and alkali solution of captopril undergo the process of intercalation assembling treatment so as to obtain supermolecular structure CpI-LDHs. Said invention also provides its chemical formula. In said slow-released captopril preparation the mass percentage content of captopril is 20-50% and the mass percentage content of water is 5-20%, and its slow-released efficiency duration can be up to 0.5 hr-12hr.

The invention discloses a method for manufacturing a honeycomb core filled with fibrofelt by using textile wastes, which is characterized by comprising the following steps: (1) manufacturing of flat-head waved fiberboards and honeycomb-shaped fibrofelt strips by using textile wastes, that is, recovering textile wastes into reprocessing fibers, wherein the thermoplastic textile wastes are well mixed with common textile wastes in proportion; preparing fiber nets, performing hot pressing of the prepared fiber nets respectively, preparing flat-head waved fiberboards and broken-line waved fibrofelt, cutting the fibrofelt to obtain honeycomb-shaped fibrofelt strips; (2) bonding and cutting of the fiberboards and fibrofelt, that is, coating adhesive tapes on peaks and troughs of the fiberboards prepared in step (1), pasting the fibrofelt strips obtained in step (1) on the troughs of the fiberboards, bonding the fiberboards on the fibrofelt strips, repeating the bonding in the above manner to obtain a honeycomb core complex; cutting the complex at the cross section to obtain the honeycomb core filled with fibrofelt. The method can make use of hard textile wastes, and the honeycomb core and the filling material have accurate structures, and improved heat insulation and sound insulation performance.

The invention discloses a tegafur/layered double hydroxide (TF/LDHs) nanohybrid-magnetic matrix compound and a preparation method thereof. The preparation method utilizes LDHs as carriers to prepare the TF/LDHs nanohybrid-magnetic matrix compound. The TF/LDHs nanohybrid-magnetic matrix compound is used for targeted delivery and controlled release of tegafur, improves drug effects and reduces drug toxic and side effects. By a coprecipitation method, Fe3O4 or MgFe2O4 as a magnetic matrix is synthesized into the TF/LDHs nanohybrid-magnetic matrix compound which is a nano-complex composed of the magnetic matrix and TF intercalated LDHs coated on the magnetic matrix and is recorded as magnetic matrix @ (TF/LDHs). The TF/LDHs nanohybrid-magnetic matrix compound has strong magnetism and has good TF slow release effects. The preparation method has simple processes and allows mild reaction conditions. Through adjustment of magnetic matrix @ (TF/LDHs) nano-compound synthesis conditions and change of a drug concentration, a synthesis temperature, magnetic matrix content and applied magnetic field intensity, the structure, the composition and a release rate of the magnetic matrix @ (TF/LDHs) can be controlled.

The invention relates to a hydrotalcite doxifluridine sustained release agent and a preparation method thereof, which belong to the technical field of hydrotalcite materials. The formula of the hydrotalcite doxifluridine sustained release agent is (M<2+>)1-x(N<3+>)x(OH) 2(5dFUR<->)a(B)bN(OH)3.mH2O. The hydrotalcite doxifluridine sustained release agent is a medicine-hydrotalcite composite material; the mass percent of doxifluridine in the sustained release agent is between 29.72 and 38.85 percent and the mass percent of water in the sustained release agent is between 4 and 11 percent; and the lasting period of sustained release is between 0.1 and 15 hours. The preparation method comprises the following steps: carbonate hydrotalcite is prepared by the coprecipitation method at first and then is sintered into composite oxide LDO; and the composite oxide LDO is mixed with a doxifluridine solution and doxifluridine intercalative hydrotalcite with the sustained release performance is obtained by the restoring method to assemble the doxifluridine between hydrotalcite layers. The hydrotalcite doxifluridine sustained release agent and the preparation method have the advantages of reinforcing the stability, improving the bioavailability, avoiding direct contact of the doxifluridine and a gastrointestinal tract and reducing the stimulary function of the doxifluridine on the gastrointestinal tract.

The invention discloses a structure design of a weakening light module used in the flat display device. The design effectively adjusts the array of luminescence parts which belongs to well-known technology and the array control electric circuit unit. In the meanwhile, when the array mentioned above is linked with its control electric circuit, the increased quantity of luminescence parts in series is independent of the quantity of feet used for connecting interface units.

The invention discloses a novel combined crankshaft mechanism of a small aviation piston engine. The novel combined crankshaft mechanism comprises a front-section crank throw unit, a rear-section crank throw unit, a butt joint cover and a bearing component, wherein the two crank throw units have a similar structure and are mutually subjected to butt joint; the two crank throw units are subjected to butt joint fixing through an inner ring of the butt joint cover; the bearing component arranged on an outer ring of the butt joint cover is taken as a middle main shaft support; each crank throw unit comprises three cranks and two connecting rod shaft paths, wherein each crank is rectangular, two ends of each crank are of a circular arc shape, the cranks are arranged in parallel, and are fixedly connected through the connecting rod shaft paths which are mutually in parallel, and the axis of each connecting rod shaft paths and the corresponding crank are mutually vertical; the two crank throw units are far away from the outer side wall of the crank on the outermost side on a butt joint position; a front and rear end main shaft diameter and a front and rear end cone shaft diameter are respectively outwards arranged along the axis of the main shaft in sequence; the end surface of the cone shaft diameter is respectively provided with an inner threaded hole for fastening an outer connecting piece. The novel combined crankshaft mechanism of the small aviation piston engine has the advantages of simple and compact structure and reasonability in arrangement, the integral rigidity and strength of the crank is improved, and product reliability is effectively improved.

The invention relates to a norcantharidin/layered double hydroxide (LDHs) nano hybrid and preparation method thereof. An LDHs is provided and serves as a carrier, the norcantharidin/LDHs nano hybrid is prepared, and the controlled release of the norcantharidin is achieved, so that the medical effect is improved, and the toxic and side effect of medicines is reduced. The method comprises that the LDHs serves as a main body, the norcantharidin is an intercalated object, the norcantharidin is assembled among LDHs layers through a coprecipitation method, and the norcantharidin/LDHs nano hybrid is prepared. The method has the advantages that the hybrid has a good slow-release effect for the norcantharidin; the process is simple and reaction is mild; and the synthesis conditions of the norcantharidin/LDHs nano hybrid are regulated, for instance, the concentration, the synthesis temperature, the ageing time and the like of medicines are changed, so that control of the structure, components and the release rate of the norcantharidin/LDHs nano hybrid can be achieved.

The invention discloses an insecticide nanocapsule for preventing and controlling insect pests of fruit trees. The insecticide nanocapsule comprises the following active components: 1-5% of spinetoramand 13-18% of a ginkgo extract. The preparation process comprises the steps of pretreatment of plant raw materials, extraction of plant components, compounding and emulsification, high-pressure homogenization, self-assembly of the nanocapsules, curing, and freeze-drying. The spinetoram and the ginkgo biloba extract are compounded, the synergistic effect is achieved, and the insecticidal activitycan be enhanced. The nano capsule obtained by the preparation process disclosed by the invention is small in particle size and high in encapsulation efficiency, not only can improve the stability of active ingredients, but also can achieve the purposes of controlling release, prolonging the lasting period and improving the effective utilization rate; therefore, the prevention and control effect onfruit tree pests is obviously improved. The insecticide nanocapsule is an ideal substitute for chemical insecticides in modern green ecological agriculture development.

The invention discloses a preparation method for an oligomerization cation surfactant. The method comprises the following steps of: (A) dissolving the prepared acrylamide with a long alkyl chain and a quaternary ammonium salt structure in a mixed liquid of water and alcohol; (B) adding nitrogen gas into the solution to remove oxygen, and adding an initiator, a catalyst and a ligand; and (C) reacting at a room temperature under the protection of the nitrogen gas.

An intercalated material for the slow-releasing antiseptic of food is prepared from the laminar anionic LDHs and FP through depositing to intercalate the FP between the layers of LDHs. Its advantages are long release time (1-60 days), and easy control of material properties.

A mould for manufacturing an induction coil comprises a plurality of diameter adjusting discs which are sequentially arranged from top to bottom. Stand columns used for adjusting the turn pitch are arranged between the adjacent diameter adjusting discs, and the center points of the diameter adjusting discs and the center points of the stand columns are located on the same axis. According to the invention, based on working condition requirements, different numbers of control modules with different diameters are selected to manufacture the induction coil; the inner diameter of each turn of coil and the turn number of the coils are guaranteed through the diameter adjusting discs; the distance between coils is guaranteed through the stand columns; it is guaranteed that the coils are not deformed by pouring fine sand into the coils; the diameter of each turn of the induction coil prepared through the mould is within the controllable range; and the number of turns can be flexibly changed.

The invention provides a photosensitive circuit structure and an optical device. The photosensitive circuit structure comprises a photosensitive unit, a signal amplification unit and a control unit, the photosensitive unit comprises a photodiode and a reset transistor, the signal amplification unit comprises an amplification transistor, and the control unit comprises a control transistor; the input end of the reset transistor is electrically connected with the power supply end, the output end is electrically connected with the control end of the amplification transistor, and the control end is electrically connected with the reset signal end; the input end of the amplification transistor is electrically connected with the power supply end, the output end is electrically connected with the input end of the control transistor, and the control end is electrically connected with the control signal end; the leakage current of the reset transistor and the control transistor is smaller than the leakage current of the amplification transistor. The carrier mobility of the reset transistor is smaller than the carrier mobility of the amplification transistor and the carrier mobility of the control transistor. The leakage current of the photosensitive circuit structure is reduced, and the signal-to-noise ratio of signal transmission in the photosensitive circuit structure is improved, so that the performance of an optical device is improved.

The present invention is magnetic slow releasing diclofenac sodium in supermolecular intercalation structure and its preparation process, and belongs to the field of hydrotalcite material technology. The magnetic diclofenac sodium has the chemical expression of (M2+)1-x(N3+)x(OH)2(DIK-)a(Bn-)b.mH2O.kM'Fe2O4, and is prepared through the first coprecipitation process to prepare nanometer magnetic kernel, the subsequent mixing of the magnetic kernel with corresponding salt solution, and the final coprecipitation process to assemble diclofenac sodium into the hydrotalcite layers and to obtain the diclofenac sodium intercalated hydrotalcite with magnetic kernel. The magnetic slow releasing diclofenac sodium in supermolecular intercalation structure has high stability, raised bioavailability, capable of magnetic field location and targeting location and effective control on the medicine structure, composition, etc.