163 results about "Chain structure" patented technology

Described herein are methods, compositions and articles of manufacture involving neutral conjugated polymers including methods for synthesis of neutral conjugated water-soluble polymers with linkers along the polymer main chain structure and terminal end capping units. Such polymers may serve in the fabrication of novel optoelectronic devices and in the development of highly efficient biosensors. The invention further relates to the application of these polymers in assay methods.

The invention discloses a low-phase noise ring voltage-controlled oscillator based on multiphase injection locking, relates to the technical field of integrated circuits, and is used for solving the technical problems that an existing injection locking oscillator limits the frequency tuning range and cannot effectively suppress noise. The invention discloses a low-phase noise ring voltage-controlled oscillator based on multiphase injection locking. The low-phase noise ring voltage-controlled oscillator comprises a first ring oscillator unit and a second ring oscillator unit, the n first ring oscillator units are connected in series to form a chain structure; the second ring oscillator unit is provided with a cross coupling inverter complementary injection unit and a tail current source injection unit; a first output end of the chain structure is connected with a second input end of the second ring oscillator unit, and a second output end of the chain structure is connected with a first input end of the second ring oscillator unit; a first signal is injected into a cross-coupling inverter complementary injection unit and a tail current source injection unit, and a second ring oscillator unit receives a second signal output by a chain structure and then outputs a third signal.

The invention relates to a modeling method in the field of molecular dynamics, in particular to an automatic polymer full-atom molecular dynamics modeling method, and the polymer modeling process is divided into three core steps: firstly, converting SMILES of a repetitive unit into SMILES of a polymer; secondly, constructing a single-chain structure; and finally, constructing a multi-chain amorphous system. The link of cross-linking reaction needs to be additionally added to the cross-linked polymer. According to the invention, through the built-in DREIDING force field parameters, an input file required by the Lammps molecular dynamics can be directly operated and generated.

The cross-linked anion exchange membrane based on styrene copolymerized vinylbenzyl chloride has high ionic conductivity and high mechanical strength. According to the technical scheme, the crosslinking process and the membrane forming process are synchronously carried out, the difficulty of casting and membrane laying is not increased while a crosslinking structure is constructed, and the anion exchange membrane has the characteristics of high ionic conductivity and high mechanical strength and is suitable for large-area casting membrane preparation. In addition, the preparation method in the technical scheme is simple in process and relatively low in cost, and has relatively good industrialization potential. The invention relates to a cross-linked anion exchange membrane based on styrene copolymerized vinylbenzyl chloride. The chain structure of the cross-linked anion exchange membrane is as shown in the following formula: # imgabs0 #, wherein A is a unit containing a quaternary amine structure or an imidazolium structure; and B is a unit of a biquaternary amine group with a double-bond alkyl chain, or a unit of an imidazole group with a double-bond alkyl chain.

The invention relates to a microporous nano foam material with a micro-nano pore structure as well as a preparation method and application thereof, and belongs to the technical field of foam materials. According to the invention, a micro-cross-linked network is taken as a core, and the problem of insufficient melt strength caused by disentanglement of molecular chains in a high-temperature processing and forming process of the hydroxyl-terminated polymer is solved through a multi-network (a cross-linked structure, a chain extension structure and a branched chain structure) structure. The preparation method comprises the following steps: firstly, preparing a high-performance microporous nano foaming material with a micro-nano pore structure by using a high-pressure foaming technology and then carrying out supercritical forming by using a supercritical foaming technology, so that the problem that all special engineering plastics containing terminal hydroxyl groups are difficult to foam due to rigid chain structures can be solved, and finally, high-frequency high-speed high-performance antennas which are used for 5G and 6G are obtained.

The present application discloses a point cloud encoding method, a point cloud decoding method, an apparatus and a communication device, which belong to the field of computer technology. The point cloud encoding method of an embodiment of the present application includes: performing coordinate transformation processing on the geometric information of the point cloud to obtain geometric information with a chain structure; determining a first target prediction point that matches the point to be encoded in the chain structure, the first target prediction point is a point selected from the first target occupied points of the chain structure, the first target occupied point includes the occupied points in the encoded row, and the first target occupied point and the point to be encoded are located in different rows of the chain structure; based on the first target prediction point, the radial distance of the point to be encoded is predictively encoded to obtain a radial distance encoding result.

The invention belongs to the technical field of functional nano materials, and particularly relates to a preparation method of a detachable engine type braking nano motor, a nano drug carrier is jointly composed of HMSN and CAT modified PNA, tetraethyl orthosilicate serves as a silicon source, and solid silicon dioxide balls are synthesized; on the basis, tetraethyl orthosilicate is used as a silicon source, CTAB is used as a pore-forming agent to synthesize mesoporous silica coated solid silica spheres; etching the core silicon dioxide ball through sodium carbonate to obtain a hollow mesoporous silicon dioxide ball; then, amino modification is carried out on the CAT modified PNA2 through 3-aminopropyltrimethoxysilane, PNA1 is connected with HMSN through an amido bond, and a double-chain structure is formed by the CAT modified PNA2 and PNA1 through complementary base pairing. According to the nano motor provided by the invention, the engine CAT of the nano motor can be detached by adding the unwinding chain PNA3, so that in-vivo deceleration and braking are realized.

The present invention relates to a bolt fastening tool for a distal slit vertical air duct, belonging to the technical field of construction engineering. It includes a locking assembly and a connecting assembly. The locking assembly is used to lock bolts at the connection of the air duct. The connecting assembly includes a chain structure with a hollow interior. The chain structure is connected to the locking assembly. The chain structure includes a number of first chain blocks and a number of second chain blocks. The number of first chain blocks are arranged at equal intervals along the direction of the first flexible shaft. A first space is formed between two adjacent first chain blocks. The number of second chain blocks are in one-to-one correspondence and matching with the number of first spaces. Any second chain block is filled in the first space. The first chain blocks and the second chain blocks are hinged to each other. By providing the chain structure, since the chain structure is formed by the mutual hinging of the first chain blocks and the second chain blocks, therefore, this structure can move along the distal slit of a straight line and can also move along the distal slit of a corner, and then convey the locking device to the connection of the corresponding air duct for connection.

The invention discloses an amphiphilic polymer as well as a preparation method and application thereof, the structural formula of the polymer is # imgabs0 #, n is 70-636, R is saturated fat alkyl, and the polymer is of a folded chain structure and is obtained by carrying out Michael addition reaction on double bonds, thioether and amino. The invention further discloses application of the amphiphilic polymer to improvement of the mechanical property of hydrogel, and the polymer has hydrophilic groups and hydrophobic groups at the same time and can be self-assembled into a regular and ordered folded chain structure. After the polymer is introduced into a hydrogel system, the strength, rigidity and toughness of the hydrogel are greatly improved.

The invention discloses a low-free-monomer waterborne polyurethane adhesive and a preparation method thereof, and relates to the technical field of adhesive preparation, the low-free-monomer waterborne polyurethane adhesive comprises a main chain structure composition, a functional additive, a reaction control and optimization additive and an auxiliary reagent, the main chain structure composition comprises low-monomer residual diisocyanate and polymer polyol, and the functional additive comprises a low-free-monomer residual diisocyanate and a low-free-monomer residual diisocyanate; by introducing a flexible chain segment and optimizing an emulsification process, an adhesive film has better hydrophobicity and a microcosmic phase separation structure, the water soaking resistance is greatly improved, the adhesive film has outstanding water resistance, a unique formula design ensures that an adhesive layer cannot be subjected to strength attenuation due to aging in a long-term use process, the bonding durability is excellent, and the adhesive film has a good application prospect. The preparation method has the advantages of reasonable process design, mild and controllable reaction conditions, good process applicability and good storage stability, and through stabilization treatment, the obtained emulsion has the advantages of uniform particle size, good mechanical stability and storage stability, and long shelf life.

The invention provides a nano photon structure chip, a preparation method thereof, a detection method and related equipment, and relates to the technical field of medical detection equipment, and the preparation method of the nano photon structure chip comprises the following steps: vertically dropwise adding a mixed solution containing PS nanoparticles and SDS onto a silicon wafer substrate; covering the area of the micro-wall template above the area where the mixed solution is dropwise added on the silicon wafer substrate, so that the PS nanoparticles are self-assembled to form a regular chain structure under the guidance of the micro-wall template and the SDS solution; dividing the regular chain structure into a plurality of detection areas, and fixing a marker detection antibody in each detection area to obtain the nano photon structure chip containing a plurality of marker detection antibody detection areas. The nano photon structure chip provided by the invention enhances an optical signal, and when the nano photon structure chip is applied to detection of biomarkers, low-concentration biomarkers in a biological sample can be quickly identified.

The utility model discloses a meshing type load chain structure and a chain group thereof. The chain structure comprises a first chain A and a second chain B which are oppositely arranged, the first chain A and the second chain B are each formed by connecting a plurality of chain links with two or more inner chain pieces and outer chain pieces in series, wherein the outer chain pieces are connected with the chain links in an end-to-end alternating mode through pin shafts. The inner chain pieces and the outer chain pieces are the same in shape and structure and are in axial symmetry. Each inner chain sheet of the first chain A and the inner chain sheet of the second chain B are oppositely and correspondingly arranged and are meshed with each other; each outer chain sheet of the first chain sheet A and the outer chain sheet of the second chain B are oppositely and correspondingly arranged and are meshed with each other; and the opposite surfaces of the inner chain sheets and the outer chain sheets are parallel and continuous smooth curved surfaces. By the adoption of the chain structure and the chain set, the load generated when the chain structure is used for conducting linear reciprocating transmission in a limited space can be effectively increased, and the mechanical noise problem generated when the chain structure and the chain set are in the working state is remarkably reduced.

The present invention provides a membrane-breaking polyester having a structure shown in formula (I) and its application. The membrane-breaking polyester has a low protonation degree at normal physiological pH, weak cell membrane damage, and low cytotoxicity, and has a high protonation degree under slightly acidic pH conditions, thereby having strong membrane-breaking activity, and can kill tumor cells efficiently and selectively. In addition, the membrane-breaking polyester does not cause long-term toxicity due to its degradable main chain structure.

The application provides high-strength spherical activated carbon and a preparation method thereof; on one hand, sulfuric acid and a promoter system are used, over-sulfuric acid (H2SO5) is generated by the reaction of the sulfuric acid and the promoter, the oxidizability of the system is significantly enhanced in a short time, and the system has certain acidity, so that the removal of -H is realized on the basis of protection of the main chain structure of a polymer; on the other hand, iron ions are added, the corrosion to a reaction container can be inhibited, the reaction condition is mild, the material requirement of the reaction container is relatively low, and meanwhile, the yield and the strength of the spherical activated carbon are improved.

The invention discloses a naphthoquinone-based gas sensitive material, a preparation method and application of the naphthoquinone-based gas sensitive material in an ammonia gas sensor, and belongs to the technical field of gas sensors. The material is composed of divalent metal ions such as copper, nickel and cobalt and a polysubstituted naphthoquinone organic ligand, forms a one-dimensional chain structure, has a high specific surface area, an ordered electron channel and excellent molecular recognition capability, and can detect toxic gases such as ammonia gas at room temperature with high sensitivity. Macroscopic preparation of the material can be realized through solvothermal one-step reaction. Compared with the prior art, the one-dimensional coordination structure and ligand site engineering synergistically improve the carrier transport and molecular recognition capability, can realize continuous, real-time and selective detection of ammonia gas under complex working conditions, and has the advantages of high yield, large-scale preparation and excellent device application prospect.

Provided is an ink-repellent member including an underlying portion containing an inorganic oxide, the ink-repellent member having a fluorine compound bonded to a surface of the underlying portion, wherein the fluorine compound has a chain structure, and is bonded to the surface by forming a phosphonic acid ester structure at each of both ends thereof.

The application discloses a kind of critical conductivity simulation calculation method and system of chain structure impressed current protection, by building COMSOL simulation model, according to wire diameter, chain structure size, metal material conductivity, set current physical field related parameters in COMSOL software, for simulating calculation under different conductivity caused potential attenuation;According to the seawater conductivity obtained in test, the conductivity of metal material, polarization curve, set the secondary current distribution physical field related parameters in COMSOL software, and combine the potential attenuation obtained in current physical field as boundary condition simulation potential distribution under steady state in seawater, if potential distribution reaches the requirement of protection potential, the conductivity corresponding to potential attenuation at this time is critical conductivity.The method can accurately and conveniently evaluate the critical conductivity of chain structure impressed current cathodic protection, and provide a reference for the design of chain structure impressed current cathodic protection system.

The application relates to a fluorine-containing ferroelectric nematic liquid crystal molecule and application thereof, relates to the technical field of photoelectric materials, and solves the problem of low dielectric constant of traditional liquid crystal materials which restricts the application of the liquid crystal materials in photoelectric functional devices. The molecule adopts a unique non-chiral V-shaped configuration design, takes a benzene ring as a core skeleton, and realizes performance optimization through meta-connection of differentiated functional side chains. In the molecular structure design, a strong electron-withdrawing trifluoromethyl substituent is introduced into the benzene ring 2, 4 of one end of the side chain, the intermolecular interaction force is enhanced, and the long-range order of the material is maintained; the other end adopts an alkoxy flexible chain structure, which not only improves the solubility of the material, but also enhances the thermal stability. The raw material is easy to obtain, the preparation is simple, the fluorine-containing ferroelectric liquid crystal molecule is in a nematic phase, the dielectric constant can be as high as 1.4 x 10 4 (1 kHz), and has a wide ferroelectric nematic phase transition temperature, high polarization intensity and nonlinear optical response, and has important application value in the field of photoelectric functional materials.

This application provides a method for preparing graphene materials using waste masks. In this application, the PP layer material in the mask is infiltrated into silicone rubber, and with the assistance of the silicone cured on the PP layer material, the chain structure of the PP material is transformed into a ring structure during the laser processing of a laser engraving machine, thereby preparing a flexible graphene film. The graphene film prepared by the method of this application can not only play a certain role in alleviating the environmental pressure problem caused by waste masks, but also play a greater role by upgrading the material of waste masks to graphene to provide a flexible conductive material. The graphene obtained by the preparation of this application has excellent sensor performance and superhydrophobic characteristics, and experiments have proved that the graphene material provided by this application can be applied to the manufacture of temperature sensors, humidity sensors, and flexible sensors, which is of great significance for future application promotion.

The invention provides a synthesis method of novel flexible epoxy resin, which comprises the following steps: firstly, reacting anhydride and a hydroxyl-containing polymer according to a certain molar ratio, carrying out ring opening on the anhydride and the hydroxyl under the combined action of high temperature and a catalyst in a slightly excessive amount to prepare a prepolymer with carboxyl at the end position; then, the polymer with carboxyl and a certain amount of epoxy resin with a special main chain structure are subjected to a reaction, the epoxy group is subjected to ring opening and chain extension, the molecular weight and viscosity are controlled by adjusting the mass ratio of the epoxy resin to the prepolymer, and finally the flexible epoxy resin with high flexibility, high elongation at break and low-temperature cracking resistance is prepared.

The present application discloses a non-fluorine polyaryletherketone (nitrile) resin, which adjusts the size and position of the long-chain side groups through the main chain structure design, further reduces the close stacking between the molecular chains, and can form a larger pore structure during the molding process, so that it has a lower dielectric constant and dielectric loss. At the same time, the material does not produce toxic and harmful substances such as fluorophosgene when treated at high temperatures, ensuring the safety of the material. The non-fluorine low-dielectric polyaryletherketone (nitrile) resin of the present application has the advantages of low dielectric constant and low dielectric loss, and is widely used in 5G and higher frequency communication fields.

The present disclosure provides a nano-chain structure chip and a preparation method and a detection method thereof and related equipment, relates to the technical field of biological detection, and the detection method comprises the following steps: dropping a detection sample on the nano-chain structure chip, collecting multiple frames of images in a reaction process of the nano-chain structure chip and the detection sample; performing segmentation processing on each target image to obtain a genus detection area image, a species detection area image, a bacterial virulence detection area image and a blank control area image corresponding to each image; inputting the images into a pre-trained genus detection model, a species detection model and a bacterial virulence detection model respectively, outputting genus detection results, species detection results and bacterial virulence detection results of each image, and performing correlation analysis, and determining whether the detection sample contains microorganisms and the species and virulence of the microorganisms according to a correlation analysis result. The present disclosure can quickly realize full-chain detection of the genus, species and virulence.

The utility model relates to the technical field of chain structures, and discloses a step roller type chain structure convenient to disassemble, which comprises a front side outer chain connecting plate, a front side inner chain connecting plate, an internal support pin bush, a connecting pin shaft, a rear side inner chain connecting plate I and a rear side inner chain connecting plate II, a front side inner chain connecting plate and a first rear side inner chain connecting plate are connected to the side face of the inner supporting pin sleeve in a sliding mode, and a front side outer chain connecting plate and a second rear side inner chain connecting plate are connected to the outer side of the front side inner chain connecting plate and the outer side of the first rear side inner chain connecting plate in a sliding mode. The inner sides of the front side outer chain connecting plate, the front side inner chain connecting plate, the inner supporting pin sleeve, the first rear side inner chain connecting plate and the second rear side inner chain connecting plate are rotationally connected with connecting pin shafts. According to the step roller type chain structure, traditional limitation is broken through, a damaged part is convenient to disassemble and replace, the chain purchasing cost is saved, and the resource utilization rate is increased; the special design enables the chain to be uniformly stressed, prolongs the service life, and guarantees the stable operation of a mechanical transmission system.

The present invention relates to a colloidal quantum dot material, which comprises colloidal quantum dots and a colloidal quantum dot ligand, and the colloidal quantum dots are encapsulated within the colloidal quantum dot ligand. The colloidal quantum dot ligand has the following structural formula (I). On the one hand, the colloidal quantum dot ligand with this structure can help the colloidal quantum dots disperse in solution, thereby realizing solution processing. On the other hand, after the colloidal quantum dot material forms a film, the colloidal quantum dot ligand can be decomposed into a short-chain structure through a simple annealing process, thus eliminating the traditional multiple ligand exchange and elution processes. The array of colloidal quantum dot photodetectors prepared based on the technical solution of the present invention has an ideal external quantum efficiency.

The invention discloses a regenerated polypropylene composition as well as a preparation method and application thereof. The composition comprises regenerated polypropylene, polyamide resin, a chain extender, an initiator, a metal deactivator, a nano nucleating agent, a halogen-free flame retardant, glass fibers, a flexibilizer, a styrene-glycidyl methacrylate copolymer, a lubricant, an antioxidant, a light stabilizer and the like. The molecular chain structure is repaired by the chain extender containing at least two epoxy groups, the interface compatibility is improved by matching with the reactive compatibilizer, and crystallization is induced by the nano nucleating agent, so that the mechanical property, the thermal stability and the flame retardant property of the regenerated polypropylene are remarkably improved. The material has excellent tensile strength, impact toughness, heat aging resistance and flame retardant grade, meets the requirements of robot cable protective sleeve materials, and is beneficial to widening the application range of regenerated polypropylene.

The invention discloses a method for preparing high-stability anionic polyacrylamide based on thiol-ene click chemistry. The core of the method is to construct an omnibearing stable system of a polymer from three dimensions through a click chemical reaction: the structure is stable: a topological chain structure with a space charge shielding effect is formed through accurate arrangement of monomers, so that a molecular skeleton and an active group keep long-acting stability. And the conformation is stable: the rigid-flexible adjustable chain segment design forms an internal microphase separation structure, so that the polymer can maintain the stretched and stable hydration conformation in various aqueous solutions, and the performance is consistent. And the process is stable: the reaction mechanism of ion complexing and click addition realizes the gentle release of polymerization heat, so that the synthesis process has high tolerance to parameter fluctuation. According to the invention, the problem of performance degradation caused by disordered structure and sensitive process of a traditional product is systematically solved, and a reliable solution is provided for the application field with strict requirements on stability.

The utility model relates to the technical field of chains, and discloses an anti-attrition dustproof chain structure which comprises a chain body, a dustproof assembly, a first protection block and a second protection block, wherein the dustproof assembly is rotationally arranged at the two ends of a sleeve of the chain body and used for preventing dust from entering a roller gap between the sleeve and the chain body, and the first protection block and the second protection block are arranged outside the sleeve in a sleeving mode. Mounting grooves are formed in the first protection block and the second protection block, sealing blocks are slidably inserted into the mounting grooves, and the sealing blocks located outside the mounting grooves abut against the chain plates of the chain body. The dustproof assembly is reasonable in structure, the gap between the sleeve and the roller can be sealed, external dust and sundries are prevented from entering the gap between the sleeve and the roller, a user can conveniently detach the dustproof assembly from a chain, the cruising ability of the dustproof assembly can be improved, and the protection performance is high.

The invention provides a cavity chain structure for a standing wave accelerating tube, the standing wave accelerating tube and an accelerator. The cavity chain structure comprises a plurality of bunching cavity units which are sequentially arranged in the direction of an electron beam current; the coupling cavities are arranged between the adjacent bunching cavity units; the bunching cavity unit comprises a bunching cavity and a beam hole used for forming an electron beam channel. Beam bunching cavities of the beam bunching cavity units on the side, close to the electron gun, of the cavity chain structure are designed to be in an asymmetric cavity type in the electron beam current direction. The small focus design of the standing wave accelerating tube can be realized through the cavity chain structure.

The invention provides a heat-conducting electric insulation composite material as well as a preparation method and application thereof, and relates to the technical field of polymer materials. Specifically, the preparation method comprises the following steps: separately preparing sulfonated polyether ether ketone, functionalized boron nitride and acidified carbon nanotubes, and then fully mixing the sulfonated polyether ether ketone, the functionalized boron nitride and the acidified carbon nanotubes with an organic solvent to obtain a dispersion liquid; performing electrostatic spinning by taking the dispersion liquid as a spinning solution to obtain a fiber membrane; and sequentially carrying out drying treatment and hot pressing treatment on the fiber membrane to obtain the heat-conducting electric insulation composite material. Soluble sulfonated polyether-ether-ketone with a main chain structure similar to that of polyether-ether-ketone is selected as spinning, the defect that a conventional polyether-ether-ketone material cannot be subjected to electrostatic spinning is effectively overcome, meanwhile, functionalized boron nitride and acidified carbon nanotubes are used as filler, the dispersity of the filler can be improved, a good heat conduction path is formed, and the heat conduction performance of the material is improved. And the interface compatibility is improved through the interface interaction with the matrix.

The invention belongs to the technical field of preparation of functional high-molecular compounds, and particularly relates to preparation of polyurethane with adjustable main chain function and sequence (unit structure) by a cyclic monomer in various solvents with different polarities under various temperatures and various initiator concentrations in the absence of a catalyst. The ester group, amido bond or ether bond on the main chain structure of the obtained polyurethane can be designed, regulated and controlled according to product requirements, the PDI of the polyurethane can be controlled to be 1.2 or below, which is difficult to realize by other polymerization methods, and the high-precision polyurethane with the structure cannot be obtained by the existing method.