58 results about "Bond formation" patented technology

The invention discloses a Zn / N co-doped porous soft and hard carbon composite negative electrode material and a preparation method thereof, and belongs to the technical field of secondary battery negative electrode materials. According to the method, bagasse is taken as a carbon source, asphalt is supplemented to regulate and control a carbon structure, a zinc source induces ion doping, micropore construction and Zn-NH2 bond formation, heteroatom doping is realized by a nitrogen source, and the hard carbon material with high N doping efficiency and a hierarchical porous structure is constructed through a doping-pore forming-stabilizing three-in-one cooperative regulation and control strategy. Through the integrated design of Zn induced doping stability, structure regulation and interface optimization, a new thought and a technical path are provided for developing a high-performance sodium ion battery negative electrode material.

The invention discloses a copper porphyrin conjugated acetylene polymer composite material, a preparation method and application of the copper porphyrin conjugated acetylene polymer composite material in biological mercaptan photoelectric detection, the composite material comprises an electrochemical reduction graphene oxide layer, a poly (1, 4-diacetylene benzene) layer and a copper porphyrin conjugated acetylene copolymer layer, and the three layers form a layered composite structure through pi-pi interaction. The copper porphyrin conjugated acetylene copolymer is formed by copolymerization of a 1, 4-diacetylene benzene monomer and a copper-coordinated 5, 10, 15, 20-tetra (4-acetylene phenyl) porphyrin monomer through a Sonogashira coupling reaction, and the composite material utilizes a double recognition site mechanism that a Cu-S coordinate bond is formed by a porphyrin center and sulfydryl and an acetylene bond and the sulfydryl are subjected to a click reaction under illumination. The high-sensitivity and high-selectivity detection on the L-cysteine and the reduced glutathione is realized, and the detection limit on the L-cysteine can reach 2.3 mu M.

This invention relates to a g-C3N4@NiS composite photoelectrocatalyst and its preparation and application. The catalyst has a flower-like hierarchical porous structure, composed of g-C3N4 nanospheres and NiS nanoparticles supported thereon. The g-C3N4 nanospheres are assembled from stacked nanosheet layers. The NiS nanoparticles and g-C3N4 nanospheres form an in-situ covalently bonded heterojunction through Ni-S and Ni-N bonds, constructing a p-n heterostructure. The preparation method involves mixing melamine, glucose, CTAC, nickel acetate, and thiourea, and simultaneously achieving the condensation polymerization of g-C3N4 and the growth of NiS using a low-temperature one-pot hydrothermal method. Under alkaline conditions, the HER overpotential of this catalyst is only -2 mV at 10 mA cm⁻¹. ‑2 The overpotential of OER is 270 mV at 10 mA cm⁻¹. ‑2 In the dual-electrode total water splitting system, only 2.4 V is required to achieve 20 mA cm⁻¹. ‑2 It achieves a high current density and operates stably for over 24 hours, exhibiting excellent catalytic activity and stability in seawater. This invention boasts advantages such as a simple synthesis process, strong interfacial coupling, superior catalytic performance, and resistance to seawater corrosion.

The invention discloses a method for preparing a hydrophobic coating on an electroplated chromium surface, which comprises the following steps: adding dispersion liquid of nano particles into chromium plating liquid to obtain composite chromium plating liquid, and electroplating a workpiece by using the composite chromium plating liquid to obtain a chromium plating layer, the nano particles are at least one of silicon dioxide, silicon carbide or silicon nitride, silica sol and silicon-fluorine-containing resin are sequentially applied to the chromium plating layer, and the hydrophobic coating is obtained after drying. According to the invention, the nano particles are doped with the electroplated chromium, the chromium plating layer contains Si, so that Si-OH bonds are formed on the surface of the electroplated chromium, silica sol is used as a silicon transition layer, the lower part of the silica sol can form Si-O-Si chemical bonds with Si-OH in the chromium plating layer, and the upper part of the silica sol can form Si-O-Si chemical bonds with Si-OH bonds in silicon-containing fluorine resin; and the binding force of the hydrophobic coating and the chromium plating layer is greatly improved.

The invention discloses antibacterial titanium dioxide with high temperature resistance and a preparation method. The titanium dioxide comprises a titanium dioxide base material, an inorganic coating layer coating the surface of the titanium dioxide base material and an organic coating layer coating the surface of the inorganic coating layer, the inorganic coating layer comprises a nano-silver film layer; the organic coating layer is a coating layer formed by introducing Ti-S bonds. The titanium dioxide is subjected to inorganic coating and organic modification treatment in sequence. A high-dispersion nano-silver film layer and a Ti-S bond are introduced, so that the titanium dioxide has excellent antibacterial property and temperature resistance, and the use requirements of the plastic industry are met.

This invention relates to an electron beam co-cured epoxy resin composite material with sustained-release function, its preparation method, and its application. The raw materials for this composite material include 40-60% epoxy resin, 10-20% polydimethylsiloxane, 9-15% epoxy acrylate, 5-10% amine curing agent, 2-8% inorganic nanofiller, 3-7% functionalized composite sustained-release material, 3-6% organotin catalyst, and 10-30% diluent. The coating prepared based on this material has an epoxy resin-based three-dimensional network structure, with inorganic nanofiller and functionalized composite sustained-release material uniformly dispersed within it. This three-dimensional network structure is formed by the cross-linking of the amine curing agent and epoxy resin to form a basic network. Electron beam irradiation causes the epoxy acrylate to generate highly active free radicals, which act on unreacted epoxy groups and the active sites of polydimethylsiloxane, promoting the formation of Si-O-C covalent bonds and C-O-C ether bonds and increasing the cross-linking density. This invention does not require fluorine-containing substances and possesses low surface energy, high mechanical strength, strong adhesion, and antibacterial properties.

The invention relates to a method for preparing a two-dimensional polymerization fullerene film through vapor deposition, and belongs to the technical field of two-dimensional materials. According to the method, a vapor deposition method is adopted, firstly, gaseous fullerene molecules are reduced, bonding among the fullerene molecules is induced, ordered covalent connection is formed, and therefore the two-dimensional polymerization fullerene film is directly obtained on a substrate. The two-dimensional polymerized fullerene film is directly synthesized in a vapor deposition mode, and the method is simple, high in efficiency and large in area. Compared with a traditional stripping mode, the method has the advantage that the two-dimensional polymerized fullerene film is directly synthesized on the surface of the substrate.

The invention belongs to the technical field of biomedical materials and tissue engineering, and particularly relates to a self-pumping stent material with a double-layer heterogeneous structure as well as a preparation method and application of the self-pumping stent material. A hydrophobic membrane is prepared by an electrostatic spinning technology, and a hydrophilic microgel assembly is prepared by an emulsion method. Adding a dopamine modified polymer, and establishing a dynamic phenylboronic acid ester bond between microgel through a dopamine group to form a hydrophilic microgel assembly; the adhesion connection of the microgel assembly and the hydrophobic membrane is realized through mussel bionic chemical reaction of dopamine groups, and a double-layer heterogeneous structure based on the hydrophilic assembly and the hydrophobic membrane is constructed, so that a self-pumping effect is generated, and one-way flow of liquid components from the hydrophobic side of the stent to the hydrophilic side of the stent can be realized. Implanting the stent into an alveolar bone defect wherein the hydrophobic membrane contacts gingiva and the hydrophilic microgel assembly fills the bone defect; through the self-pumping effect of the stent, nutritional ingredients in the gingiva are unidirectionally pumped to the defect part of the alveolar bone, so that the regeneration of the alveolar bone is promoted.

The application relates to the paint technology field and discloses a high-temperature-resistant paint and a preparation method thereof. Epoxy resin, a filler, a dispersing agent and a defoaming agent are added into a solvent, a curing agent is added after stirring, and the high-temperature-resistant paint is obtained. The curing agent is composed of a polyamide curing agent and UPy diamino diphenyl sulfone; UPy structure forms stable quadruple hydrogen bond action in the molecular chain bond of the epoxy resin, the crosslinking density of the epoxy resin is improved, when the epoxy resin is stressed, the quadruple hydrogen bond can be broken by absorbing energy at the same time, stress can be consumed and energy can be transmitted, the paint curing product is not damaged by stress, has good toughening effect, and the toughness of the paint film is improved. The heat-resistant diphenyl sulfone structure is introduced into the molecular chain of the epoxy resin, the high-temperature-resistant performance of the paint is improved, and the paint has higher thermal decomposition temperature.

The present invention provides a novel monomer, which provides a new functionality by including a novel monomer formed by a bond between a pentagonal cyclic olefin molecule and a photosensitive molecule, may control mechanical and thermal properties, and is formed by a bond between Chemical Formula 1 and any one of Chemical Formulae 2 to 4 in order to perform chemical recycling through reversible chemical changes according to the external stimulus.

The application discloses a kind of hydrophilic rubber and its preparation method and application, the hydrophilic rubber includes modified rubber, and the surface of the modified rubber is covered with hydrophilic polymer coating;The modified rubber is prepared by the following steps: isoprene rubber or natural rubber is treated with epoxidation reagent and strong oxidant.The modified rubber and hydrophilic polymer coating are covalently grafted by hydrogen bond complexation or by ester bond, ether bond, wherein the hydrogen bond is not easily destroyed by small molecule solvent by hydrophilic polymer coating, and hydrogen bond is conducive to improving the stability of hydrophilic coating, and cooperatively makes rubber keep hydrophilic lubricity.The hydrophilic rubber of the application has good biocompatibility, and has no irritation to skin.The hydrophilic rubber of the application can be applied to self-lubricating condom, and the surface coating of condom can greatly reduce the friction coefficient after being contacted with water, aqueous solution or body fluid.

The application relates to the technical field of organic synthesis, in particular to a synthesis method for forming carbon-carbon bonds under palladium catalysis, which comprises the following steps: mixing an olefin derivative and an iodine-substituted aromatic compound to form a mixed reaction system, and reacting under the catalysis of a palladium catalyst and ultrasonic conditions to obtain an aromatic hydrocarbon compound. The synthesis method effectively avoids the use of a solvent, and has the advantages of mild reaction conditions, low reaction temperature and simple post-treatment process.

This application relates to the field of materials technology, specifically to a composite material, its preparation method, and its application. The composite material comprises organic molecules containing a conjugated structure and carbon materials containing π bonds, with the organic molecules loaded onto the surface of the carbon materials via non-covalent bonds. The carbon atoms in the composite material have four valence electrons, three of which are sp electrons. 2 One unbonded electron forms a π bond with a neighboring atom in a perpendicular direction. The π bond is in a half-filled state, which allows the π bond of the carbon material to interact with organic molecules with conjugated structures to form non-covalent C-H···π bonds. This enables organic molecules to be loaded onto the surface of the carbon material, greatly improving the catalytic activity of the composite material. It also gives the composite material good anti-agglomeration and stability, and makes the composite material easy to recycle after use.

The invention provides a pH and redox dual-responsive cryogel material and a preparation method and application thereof, and the pH and redox dual-responsive cryogel material is prepared by modifying a natural polymer or a synthetic polymer grafted hydrazide and an aldehyde group with biocompatibility, and condensing the hydrazide and the aldehyde group into a reversible dynamic covalent bond acylhydrazone bond at low temperature. The shape memory crystal gel for quickly stopping bleeding is formed. The cryogel generates gel-sol change in an acid environment, disulfide bonds can be broken under the action of a reducing agent, and material removal and wound cleaning after hemostasis are facilitated. The cryogel material provided by the invention is low in raw material price, simple in process, good in biocompatibility and obvious in pH responsiveness, forms a physical barrier to block a bleeding wound after being in contact with blood, and is easy to remove after being dissolved in an acid environment.

The invention provides a surface imprinting organic catalyst for directionally constructing catalysis and selecting sites, and a preparation method and application of the surface imprinting organic catalyst. According to the method, an aldehyde-alcohol reaction, which is one of important reactions of carbon-carbon bonding, is selected as a target reaction, and a selective cavity matched with a catalytic activity center is constructed on the surface of a magnetic carrier Fe3O4 by adopting a surface molecular imprinting technology and designing template molecules by taking a covalent connection product of a catalyst tryptophan and a target catalytic product as a template. The construction of the surface molecular imprinting cavity ensures that the active center of the catalyst is in full contact with a substrate molecule, the catalytic efficiency is improved, and meanwhile, the imprinting cavity has a certain selective recognition capability, can be matched with a reaction substrate similar to a template structure and a functional group, has a selective catalysis capability in a complex reaction system, and can be used for preparing a catalyst. Wide application prospects are realized.

This invention provides a method for protein functionalization involving post-translational modification in a manner that is selective, reliable, and under the possibility of benign, moderate redox, enabling the addition of reactive functional side chains. [Solution] The present invention relates to photoredox-mediated functionalization of proteins at chemical groups via radical generation and CC bond formation using specific boronate and sulfone precursor compounds. The present invention also relates to functionalized proteins that can be produced by this method, and the specific boronate and sulfone precursor compounds themselves.

The application provides a P450 enzyme mutant, a fusion protein and application thereof, the mutant is selected from any one of the following: a mutant formed by mutating an amino acid at the 85th position of a P450 enzyme shown in SEQ ID NO: 1 into glycine, alanine or cysteine, a mutant formed by mutating an amino acid at the 89th position of a P450 enzyme shown in SEQ ID NO: 2 into glycine, a mutant formed by mutating an amino acid at the 93rd position of a P450 enzyme shown in SEQ ID NO: 3 into glycine, a mutant formed by mutating an amino acid at the 85th position of a P450 enzyme shown in SEQ ID NO: 4 into glycine, and a mutant formed by mutating an amino acid at the 89th position of a P450 enzyme shown in SEQ ID NO: 5 into glycine. The P450 enzyme mutant can catalyze intramolecular C-S bond formation, and through improving the product selectivity of the P450 enzyme, specific synthesis of high-purity sulfur-containing compounds is realized.

The purpose of the present invention is to provide a textile product to which a metal-organic framework has been adhered, the textile product having excellent deodorizing properties and excellent washing resistance (stability against sweat and laundry detergent).　A textile product to which is adhered a metal-organic framework structure, in which metal ions and organic ligands form coordinate bonds, wherein the metal ions are zirconium ions, and the organic ligands contain at least a compound represented by formula (I). [In the formula, X is as defined in the description.]

Method (100) for manufacturing an organic, light-emitting component (1), comprising the method (100): • Forming (110) an electrically active area (104); • Applying (120) an adhesive layer (106) to or over the electrically active area (104), wherein the adhesive layer (106) comprises a magnetic material (108) distributed in an adhesive (112), the magnetic material (108) being embedded as particles in the adhesive (112); and • Applying (130) an alternating magnetic field (114) to the adhesive layer (106) such that the adhesive (112) forms at least one adhesive bond (116), wherein an adhesive bond (116) is formed between the adhesive (112) and the electrically active area (104), • wherein the adhesive layer (106) is designed and / or the alternating magnetic field (114) is configured such that the adhesive layer (106) has a lateral structuring after the formation of the adhesive bond, wherein • the electrically active region is formed with an optically inactive region and an optically active region arranged next to the optically inactive region, wherein the adhesive layer (118) has at least one adhesive compound (116) in the optically inactive region and the optically active region is free of this adhesive compound (116), and • the optically inactive area is a peripheral area and the optically active area is a central area that is laterally surrounded by the optically inactive peripheral area.

The purpose of the present invention is to provide a textile product to which a metal-organic framework has been adhered, the textile product having excellent deodorizing properties and excellent washing resistance (stability against sweat and laundry detergent).　A textile product to which is adhered a metal-organic framework structure, in which metal ions and organic ligands form coordinate bonds, wherein the metal ions are zirconium ions, and the organic ligands contain at least a compound represented by formula (I). [In the formula, X is as defined in the description.]

The application belongs to the technical field of flame retardant synthesis, and particularly relates to a phosphorus-nitrogen type polyionic liquid flame retardant as well as a preparation method and application thereof. The application introduces rich terminal hydroxyl groups in the polyionic liquid main chain through radical copolymerization of olefin-based phosphonic acid, terminal hydroxyl acrylate and acryloyloxybenzophenone. The hydroxyl groups can form strong hydrogen bonding with the urethane groups or ether bonds of TPU, significantly improving the dispersion stability of the flame retardant in the matrix, and completely solving the problem of easy migration and precipitation of traditional ionic liquid flame retardants. On the other hand, by adjusting the feeding ratio of olefin-based phosphonic acid and terminal hydroxyl acrylate monomers, the alkyl imidazole chain length and the neutralization degree of the phosphonic acid group, the phosphorus-nitrogen ratio of the flame retardant can be precisely adjusted, the balance between the carbonization property and the inert gas release amount during combustion is optimized, the material can reach V-2 level in UL-94 vertical combustion grade, and preferably, can reach V-0 level.

This invention relates to a semi-organic insulating coating for non-oriented silicon steel and its curing process. The coating comprises the following components by weight: 100 parts aluminum dihydrogen phosphate; 25-200 parts epoxy resin; and 0-1000 parts deionized water. This invention uses epoxy resin as the organic matrix and aluminum dihydrogen phosphate as the inorganic film-forming agent. The two can undergo a cross-linking curing reaction to generate P-O-C bonds, forming a stable organic-inorganic hybrid cross-linked structure. The coating exhibits optimal thermal stability when the mass ratio of epoxy resin to aluminum dihydrogen phosphate is 1:2. This invention also optimizes the curing process of the coating. The optimal curing process is 250℃ for 30 seconds. The coating obtained under this process is uniform and dense, without obvious porosity or agglomeration. It achieves a pencil hardness of 9H, adhesion of Grade A, and an interlayer resistance as high as 28.612 Ωcm², demonstrating excellent insulation performance. It is suitable for the rapid curing requirements of continuous industrial production lines for non-oriented silicon steel and has good application prospects.

The invention belongs to the technical field of gas storage, and particularly relates to a polyhedral cage-shaped metal organic framework material with high connectivity, a preparation method of the polyhedral cage-shaped metal organic framework material and application of the polyhedral cage-shaped metal organic framework material in energy gas storage. The chemical general formula of the high-connectivity polyhedral cage-shaped metal organic framework is [M4 (mu3-O) 3 (mu3-SO4) (L1) (L2) 2], M is Co or Ni, and an organic ligand L1 is 4, 4 ', 4' '-((1, 3, 5-triazine-2, 4, 6-triyl) tri (azanediyl)) tribenzoic acid and a derivative thereof; the organic ligand L2 is 2, 4, 6-tri (4-pyridine) 1, 3, 5-triazine and a derivative thereof; the metal ion M, the organic ligand L1 and the organic ligand L2 form a porous crystalline material through coordinate bonds; and oxygen anions, sulfate ions, imino groups and pyridine / benzene functional groups are modified in the cage-shaped pore channels. The synthesized Co-TPT-TATB material and the synthesized Ni-TPT-TATBA material have excellent methane storage performance, and the two materials have the advantages of being good in stability, high in regeneration capacity and the like.

The invention provides a method for preparing methyl phosphorus dichloride under the catalysis of a heteropolyacid supported catalyst, which comprises the following steps of: reacting methane and phosphorus trichloride under the action of the heteropolyacid supported catalyst to prepare the methyl phosphorus dichloride, the heteropolyacid supported catalyst is a tungsten-molybdenum-vanadium heteropolyacid supported catalyst. According to the method, the tungsten molybdenum vanadium heteropolyacid supported catalyst is adopted for catalytic preparation of the methyl phosphorus dichloride, under the action of the catalyst, methane activation can be accelerated and C-P bond formation can be promoted at a relatively low temperature, so that a target product can be quickly desorbed from active sites, and side reactions are reduced; furthermore, under the action of the catalyst, the reaction temperature is further reduced, methane carbonization and side reaction are reduced, and the process treatment flow is simplified; furthermore, under the condition of excessive methane and the action of the catalyst, the reaction efficiency is improved, the conversion rate of PCl3 is improved, the PCl3 residue is close to 0, and the subsequent separation process is simplified; belongs to the technical field of organic synthesis.

The present invention discloses a molecular sieve with a point-sieving structure, its preparation method, and its application in the adsorptive separation of propylene and propane. The molecular sieve is formed through coordination bonds among 1,2-ethanedisulfonate anions, 4,4′-dipyridyl sulfide, and Cu2+, with the chemical formula [MSL2]∞, where M represents Cu2+, S denotes the 1,2-ethanedisulfonate anion, L denotes 4,4′-dipyridyl sulfide, and ∞ indicates that the molecular sieve is spatially extended from multiple MSL2 structural units. The molecular sieve features localized point-like pore constrictions. Preparation Method: A Cu2+ source, 1,2-ethanedisulfonate salt, and 4,4′-dipyridyl sulfide are mixed and reacted in a reaction solvent to obtain the molecular sieve. The present invention exhibits outstanding advantages, including excellent material stability, high adsorption selectivity, large adsorption capacity, rapid adsorption kinetics, and ease of regeneration, demonstrating significant industrial application.

The invention discloses a dynamic covalent cross-linked liquid crystal elastomer vitrimer for improving driving stress and driving stability as well as a preparation method and application thereof, and relates to the technical field of liquid crystal elastomers. The liquid crystal elastomer vitrimer comprises the following raw materials in parts by weight: an acrylate double-bond liquid crystal unit, a double-bond-containing tertiary amine monomer, a borate monomer, a chain extender, a cross-linking agent, a photoinitiator and a catalyst. An intermolecular boron-nitrogen coordination bond is introduced as a sacrifice bond, energy is effectively absorbed and dissipated through reversible fracture in the material deformation process, the toughness of the material is remarkably improved and the driving stress is improved while the dynamic characteristics of boric acid ester are maintained, and the intermolecular boron-nitrogen coordination bond forms an additional physical crosslinking effect, so that the mechanical property of the material is improved. The creep resistance of the liquid crystal elastomer is effectively improved, so that the material keeps stable recovery capacity in multiple cyclic driving, the driving strain attenuation rate is remarkably reduced, and excellent driving stability is shown.

The present invention relates to a catalyst molded body comprising a zeolite material having a skeletal MFI, wherein the catalyst molded body has a specific average compressive strength and a specific aspect ratio. Furthermore, the present invention relates to a reactor comprising a plurality of the catalyst molded bodies. Furthermore, the present invention relates to a method for producing the catalyst molded body, and a catalyst molded body that can be obtained or obtained by the method. Furthermore, the present invention relates to a method for activating hydrogen peroxide, and a method for using the catalyst molded body as a catalyst and / or catalytic component, or the reactor in a reaction involving one or more of CO bond formation, CC bond formation, and / or CC bond conversion. Furthermore, the present invention relates to a method for producing olefin oxides.

The invention relates to the technical field of recycled asphalt, and particularly discloses a high-temperature-resistant large-dosage RAP recycled asphalt mixture and a gradient activation preparation method thereof, and the recycled asphalt mixture comprises the following components in parts by weight: 70-90 parts of an RAP material, 5-26 parts of a new aggregate, 4-5 parts of SBS modified asphalt and 0.04-0.05 part of a composite regenerant. The composite regenerant and the bio-oil-based regenerant provided by the invention can recover the flexibility of the aged asphalt; after the silane coupling agent is hydrolyzed, silicon hydroxyl (Si-OH) formed by the silane coupling agent and the bio-oil-based regenerant can be bonded with hydroxyl (Si-O-Si bond) on the surface of the aggregate to form a bonded network, so that the interface adhesion strength is improved, the interface slippage is reduced, the skeleton of the mixture is more stable, the stripping resistance of the interface is enhanced, the dynamic stability and the water stability are improved, and the service life of the mixture is prolonged. And after the recycling agent recovers the flexibility of the asphalt, a bonding network formed by the silane coupling agent endows the recycled asphalt mixture with a high-elasticity characteristic, and the risk of fatigue cracking is reduced.

The invention discloses an interface N-bridged Z-mechanism heterojunction photocatalyst and a preparation method and application thereof.The catalyst comprises perovskite and an amino-containing metal organic framework, and the amino-containing metal organic framework is loaded on the surface of the perovskite; covalent coordination bonds are formed between amino groups in the metal organic framework at the interface and metal ions on the surface of the perovskite, so that an atomic nitrogen bridge structure is formed; the nitrogen bridge forms a directional electron transfer channel pointing from the metal organic framework to the perovskite, net electrons are guided to be transferred from the metal organic framework to the perovskite, and an interface charge transfer mechanism of the heterojunction photocatalyst is a direct Z-mechanism. Through atomic-scale interface N-bridging engineering, active'locking 'of a charge transfer path is realized in perovskite and MOF heterojunction for the first time, a direct Z-mechanism photocatalyst is created, and the current density and degradation efficiency of the catalyst are improved.