52 results about "Chain structure" patented technology

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 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 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.

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 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 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 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.

A computer-implemented method for obtaining a Q10 value for accelerated ageing tests of a product, comprising: obtaining at least one Q10 value of a first product; performing differential scanning calorimetry on the first product; determining the ratio of semicrystalline chain structure to amorphous chain structure present in the product, using the differential scanning calorimeter analysis data of the first product; determining the ratio of semicrystalline chain structure to amorphous chain structure present in a second product using differential scanning calorimetry; predicting the Q10 value of a second material using (i) the Q10 value of the first product, (ii) the determined ratio of semicrystalline chain structure to amorphous chain structure present in the first product, and (iii) the determined ratio of semicrystalline chain structure to amorphous chain structure present in the second product. The disclosure also relates to other inventive methods for determining Q10 values including a method for determining a Q10 value of a product comprising multiple materials, a method for determining a Q10 value by making a comparison with historical Q10 values in a database, and a method using time temperature superposition.

A semiconductor device manufacturing method includes: forming an organic film composed of a polymer having a urea bond in a recess by supplying amine and isocyanate to a surface of a substrate having the recess; performing a predetermined process on the substrate on which the organic film is formed in the recess; and removing the organic film in the recess by heating the substrate that has been subjected to the predetermined process to depolymerize the organic film. The amine and the isocyanate have a terminal bifunctional linear chain structure having two functional groups at both ends of a linear chain. At least one of the amine or the isocyanate has side chains connected to the linear chain contained in the linear chain structure.

The application discloses an activated persulfate catalyst and a preparation method and application thereof, and relates to the technical field of catalysts.The catalyst is a bismuth-carbon intercalation catalyst in a chain structure, and the preparation method comprises the following steps: S1, taking a bismuth salt and an acyl benzene ligand as reaction substrates, and synthesizing Bi-MOFs through a hydrothermal reaction; and S2, calcining the Bi-MOFs at 500-700 DEG C under an inert gas atmosphere to obtain the bismuth-carbon intercalation catalyst.The bismuth-carbon intercalation catalyst activates persulfate through a non-radical direct electron transfer path, has higher activity and selectivity, can more effectively sterilize and disinfect specific structures and metabolic processes of target microorganisms, and improves the treatment efficiency; and can reduce the generation of by-products, effectively reduces the risk of the environment and the human body.

The invention relates to a solid sealing adhesive for metallographic sample preparation and a preparation method thereof.The preparation method comprises the following steps that S1, a diluent and a nanoscale filler are added into a resin matrix and then mixed, a defoaming agent is added, mixing continues, and a first material is obtained; mixing a curing agent and a curing accelerator to obtain a second material; s2, mixing the first material and the second material to obtain the sealing adhesive; wherein the resin matrix, the diluent, the nanoscale filler, the defoaming agent, the curing agent and the curing accelerator are prepared from the following components in parts by mass: 60 to 80 parts of the resin matrix, 10 to 20 parts of the diluent, 10 to 20 parts of the nanoscale filler, 0.5 to 2 parts of the defoaming agent, 20 to 50 parts of the curing agent and 30 to 70 parts of the curing accelerator, the diluent is an ether diluent with a chain structure. The prepared solid sealing glue for metallographic sample preparation has relatively high flowability and also has relatively high hardness after being cured.

The invention discloses a coating liquid for oriented silicon steel. The coating liquid contains phosphate; colloidal silica; the metal in the metal carbonate is selected from at least one of Mn, Ce, La, Y, Co, Zr and Hf; the coating liquid does not contain Cr. The invention further discloses an oriented silicon steel plate which comprises a base plate and a coating, the coating is formed by coating the coating liquid on the surface of the base plate, and the coating is of a net-shaped and / or chain-shaped structure. The invention also discloses a manufacturing method of the oriented silicon steel plate, which comprises the following steps of: coating the coating liquid on the surface of the substrate, and sintering at the plate temperature of 800-900 DEG C.

The invention provides a polyimide supercritical foaming material and application thereof, and relates to the technical field of foaming polyimide. The main chain structure of the thermoplastic polyimide contains a plurality of ester bonds, and the thermoplastic polyimide is prepared from the following raw materials: a dianhydride compound, a diamine compound and di-p-aminophenyl terephthalate, so that the affinity to CO2 is improved while the thermoplasticity of the polyimide is improved, and the thermoplastic polyimide has better foaming performance under CO2 supercritical foaming. The supercritical foaming material provided by the invention is suitable for wave-absorbing materials.

This invention provides an ethylene / α-olefin copolymer, its preparation method, and its applications. The ethylene / α-olefin copolymer contains 4.5%-13% molar percentage of the α-olefin ternary sequence EXXXE, as determined by carbon NMR spectroscopy; where E represents an ethylene-based structural unit and X represents an α-olefin-based structural unit. Through a special design of its intrinsic fine chain structure, this invention achieves high crosslinking reactivity, high crosslinking vulcanization reaction rate, and high crosslinking degree, while also maintaining good melt flowability. It can be widely used in photovoltaic module encapsulation materials. Without requiring control over the composition and amount of crosslinking aids during the crosslinking process and without relying on the crosslinking process itself, it significantly improves the processing speed and film strength of photovoltaic encapsulation materials, while reducing the use of crosslinking aids, which is of great significance for cost reduction and efficiency improvement in photovoltaic modules.

The invention relates to the technical field of organic silicon, in particular to a fluorinated silicone rubber adhesive as well as a preparation method and application thereof. The invention provides a fluorinated silicone rubber adhesive. The fluorinated silicone rubber adhesive has a structure as shown in a formula I, an adhesive molecule is of a heterogeneous chain structure, one end of the adhesive molecule is a common siloxane chain, the other end of the adhesive molecule is a macromolecule of a fluorosiloxane chain, the adhesive has good compatibility with fluorosilicone rubber and methyl glue, and the content of active functional groups is easy to control. During construction, an adhesive is smeared on a bonding interface for direct vulcanization bonding, or the adhesive can be added into fluorosilicone rubber or methyl rubber to be mixed and then subjected to vulcanization bonding, the adhesive has the advantages of high bonding efficiency, strong bonding force, flexible and simple construction process, small dosage and low cost, and the fluorine content of the fluorosilicone rubber is not reduced, so that the solvent resistance of the material is ensured. And the problems of fluorosilicone adhesion and performance reduction are well solved.

The present disclosure provides a protein having luciferase activity comprising a secondary structural arrangement H1-L1-H2-L2-B1-L3-B2-L4-H3-L5-B3-L6-L4-L7-L5-L8-B6 wherein (i) "H" is a helical domain, "L" is a loop domain, and "B" is a beta chain domain wherein the length of the B5 domain is at least 11, 12, 13, or 14 amino acids, and wherein "L" is a cyclic domain, and "B" is a beta chain domain. And residue 11 of the B5 domain is F, Y or L; and the length of the B4 domain is at least 12 amino acids, and the residue 10 of the B4 domain is F, Y, L, I, K or M; and / or residue 12 of the B4 domain is F, L, R, D, M, Q or V; (ii) the H1 domain is at least 18 or 19 amino acids in length; the residue 9 of the H1 domain is T, S, H, R, C, L, D, V, A, Q, G, E, K, I, N or M; (iii) the length of the B3 domain is at least 6, 7, 8, 9 or 10 amino acids, and the residue 1 of the B3 domain is W or H; (iv) the length of the B4 domain is at least 12 amino acids, and the residue 10 of the B4 domain is F, Y, L, I, K or M; or (v) the length of the B4 domain is at least 12 amino acids, and the residue 12 of the B4 domain is L, R, D, M, Q, or V. Additional proteins disclosed herein are illustrated in the claims. Also provided herein are luciferase substrates, assay buffers, and kits comprising one or more of a protein having luciferase activity or a nucleic acid encoding the protein, an assay buffer, and a luciferase substrate.

The invention relates to the technical field of computers, and provides a protein sequence design method and device, electronic equipment and a storage medium, and the method comprises the following steps: obtaining a compound structure comprising a target protein and a substrate; respectively encoding a protein main chain structure and a substrate structure in the compound structure based on an encoder to respectively obtain a main chain encoding feature and a substrate encoding feature, and encoding the compound structure based on the main chain encoding feature and the substrate encoding feature to obtain a compound encoding feature; and based on a decoder, decoding the coding features of the compound, and designing to obtain a target protein sequence. According to the protein sequence design method and device, the electronic equipment and the storage medium provided by the invention, the advantage that reverse folding can greatly improve the thermal stability is utilized, the types of pocket residues around the reaction substrate during the catalytic reaction are constrained through a compound structure, the thermal stability of enzyme can be greatly improved, and the yield of the enzyme is improved. And the designed target protein sequence has high success rate.

The copolymer according to the present invention comprises a first structure including two or more aromatic rings and a second structure having a chain structure in which carbon atoms are bonded to each other by a single bond, the number of carbon atoms constituting the chain structure being 6 or more, the distance between the aromatic rings in the first structure being 8.0 or less, and the distance between the aromatic rings in the second structure being 8.0 or less. The content of the first structure is 15%-85% by mass, and the content of the second structure is 15%-85% by mass.

This invention discloses a method for regulating the synergistic assembly of DNA origami. The method involves cutting a backbone chain to obtain several segmented backbone chains of different lengths, each segmented backbone chain having several enzyme cleavage sites. When the segmented backbone chains self-assemble with a third staple chain according to the base complementarity principle, the binding rate decreases, thereby regulating the synergistic assembly of DNA origami. The segmented backbone chains include a first staple chain, a second staple chain, and a single-stranded DNA strand of the backbone chain forming a partial double helix, which is then cleaved along the partial double helix by a cleaving enzyme to form several fragments of different lengths. This invention achieves effective regulation of the synergistic assembly of the backbone chain and staple chain in DNA origami technology by cutting the backbone chain. This method has wide applicability, requires no significant adjustment of the assembly buffer or temperature conditions, is not limited to the backbone chain structure, and has no impact on the final DNA origami structure.

Disclosed is a multi-block copolyester ether thermoplastic elastomer foam prepared from an aromatic polyester compound and contains a short-chain structure, a long-chain structure and a residual functional group of a chain extender. The short-chain structure has both an aromatic dicarboxylic acid ethylene glycol ester block structure and an aromatic dicarboxylic acid butylene glycol ester block structure. The long-chain structure has a polyether diol block structure. Based on 100 parts by weight of the multi-block copolyester ether thermoplastic elastomer foam, a content of the polyether diol block structure is 45 parts by weight to 65 parts by weight. The multi-block copolyester ether thermoplastic elastomer foam has a melting point not higher than 170° C. and a melt flow index less than 20 g / 10 min.

An object of the present invention is to provide a method for efficiently treating wastewater containing hydrocolloids. [Solution] A method for treating wastewater containing hydrocolloids, comprising: a pH adjustment step for adjusting the pH of the wastewater; and an active ingredient addition step for adding an aqueous solution containing a compound having a chain structure containing two or more aromatic rings as an active ingredient to the wastewater whose pH has been adjusted in the pH adjustment step, wherein in the pH adjustment step, the pH of the wastewater is adjusted to be within a pH range of ±0.5 of the pH value of the aqueous solution.

The present application relates to the field of material analysis, in particular to a kind of quantitative analysis method of bridging chain mechanics contribution in polymer nanocomposite material.The quantitative analysis method provided by the present application realizes the quantitative analysis of bridging chain mechanics contribution by artificially constructing the model of bridging chain structure, in combination with the accurate tracking of known particle number and local stress decomposition technology, establishes the quantitative relationship between "bridging chain structure-mechanics contribution", provides analysis tool and theoretical basis for rational design of high-performance nanocomposite material.

The film of the present application is a film for circularly polarized light detection, characterized by comprising: a plurality of inorganic layers forming a layered structure and / or a plurality of inorganic chains forming a chain structure, which are formed of a perovskite substance; and a chiral molecule contained in at least a part of a boundary portion between adjacent inorganic layers and / or between adjacent inorganic chains, wherein only one of an S-type chiral molecule or an R-type chiral molecule is present in the chiral molecule, or the presence ratio of either one of the S-type chiral molecule or the R-type chiral molecule is higher than that of the other, and a crystal structure of the perovskite substance is oriented in a prescribed direction.

The present application relates to the field of fluorescent sensing technology, and particularly relates to a Eu(III) metal organic framework crystalline material, a preparation method and application thereof. The Eu(III) metal organic framework crystalline material is formed by assembling a multi-nuclear Eu ion cluster and a polycarboxyl organic ligand, and an asymmetric structural unit thereof comprises a plurality of valence states of Eu ions, monodentate coordination water molecules and partially deprotonated H(DDODA) 3‑ ligands. The Eu(III) is in an octahedral coordination configuration, and the Eu(II) is in a nonahedral coordination configuration, and a trinuclear {Eu3(H2O)5(COO) 18} secondary structural unit is formed by chelation and bridging action of carboxyl oxygen atoms. The secondary structural unit is further connected to form a one-dimensional chain structure through bridging carboxyl of the ligand, and the one-dimensional chains are further connected through carboxyl not participating in bridging and pyridine / pyridine groups, and finally a stable three-dimensional metal organic framework structure is constructed. The Eu(III) metal organic framework crystalline material has good fluorescence properties and stability, and can be applied to the field of fluorescent sensing.

The present application relates to the field of semiconductor light source and organic photoelectric material, and particularly relates to a flexible electroluminescent wire and a hole injection material. The hole injection material introduces phosphoric acid groups and conjugated main chain structures in a molecular skeleton, can form stable combination with the anode surface through hydrogen bond or coordination, and improves the interface adhesion. Meanwhile, the hole injection barrier is reduced by adjusting the work function, so as to improve the hole injection efficiency and reduce the device starting voltage. In addition, the high conjugation of the polymer main chain and the design of the flexible side chain endow the material with excellent mechanical flexibility, so that the life and reliability of the coaxial flexible OLED light-emitting wire are greatly improved.

The invention discloses a chitosan oligosaccharide zwitterionic corrosion inhibitor containing a long-chain structure, a preparation method and application, belongs to the technical field of preparation of corrosion inhibitors, and solves the technical problem that existing chitosan oligosaccharide is poor in solubility and corrosion inhibition effect. The method comprises the following steps: firstly, dissolving chitosan oligosaccharide with the molecular weight of less than 2000 serving as a raw material to obtain a chitosan oligosaccharide solution; and further modifying the chitosan oligosaccharide zwitterionic corrosion inhibitor with 12-amino dodecanoic acid and 1, 3-propane sultone to obtain the chitosan oligosaccharide zwitterionic corrosion inhibitor which has a long-chain structure and contains a quaternary ammonium cation group and a sulfonic acid anion group. The chitosan oligosaccharide containing a long-chain structure is prepared, the corrosion inhibition effect of the corrosion inhibitor is improved, a physical'electrostatic adsorption 'and'chemical coordination' system is constructed, the raw materials are easy to obtain, and the prepared chitosan oligosaccharide zwitterionic corrosion inhibitor meets the requirements of sustainable and green development and is especially suitable for strong acid working conditions.

The utility model discloses a chain transmission type door opening structure and relates to the technical field of handles, the chain transmission type door opening structure comprises a glass door plate and a transmission case, an L-shaped limiting hole plate is arranged outside the transmission case, the side portion of the glass door plate is slidably connected with the L-shaped limiting hole plate through a first sliding column and a second sliding column, and a chain structure and a constant-torque spring set are arranged in the transmission case; and the input end of the chain structure is connected with a lifting block which is vertically and slidably connected to the transmission box, and the lifting block is rotatably connected to the second sliding column. The technical advantages are that through the arrangement of the chain structure and the constant-torque spring set, an indirect and stable damping effect is provided for the glass door plate in the downward turning process by means of the chain structure; damage to the glass door plate caused by too high door closing speed can be effectively reduced, and the durability of the glass door plate in use can be effectively improved; the interior of the guide rod is hollowed out, the position of the positioning column is detected through the proximity switch, the vertical lifting stability of the lifting block can be improved, and in-place detection of the lifting block can also be achieved.

This invention discloses a zero-pollution synthetic leather based on a hydrophilic microporous strong-chain structure and its manufacturing method, belonging to the field of synthetic leather manufacturing technology. The manufacturing method uses GA-MA as a chain extender, reacting it with starch-based polyols, PTMG, PEG, and IPDI to obtain a self-catalytic bio-based waterborne polyurethane emulsion. It employs a single-material TPU system: the TPU base fabric is prepared by melt spinning, the impregnated layer is wet-coated to form hydrophilic micropores, the surface layer is dry-coated to form a water-resistant and breathable membrane, and heat-setting forms strong chain bonds. The product of this invention has a tensile strength of 142 N / cm and a moisture permeability of 6.2 mg / cm². 2 • h, DMF residue < 5 mg / kg, bio-based content 52-68%, melt recovery rate 96%, carbon emissions 0.85 kg CO2 / m (48.5% lower than traditional methods); achieving “0 carbon, 0 toxic, 0 waste” fully ecological manufacturing of synthetic leather.