207 results about "Azobenzene" patented technology

This invention discloses a visible-light-responsive dynamically covalently cross-linked self-healing polyurethane and its preparation method, belonging to the field of self-healing materials technology. The material is prepared by reacting diisocyanate, long-chain diol, butanediol, trimethylolpropane, and a monool containing an azophenylboronic acid structure in a certain proportion at 60°C. This invention achieves visible-light-responsive self-healing of the polyurethane material by introducing a visible-light-responsive azophenylboronic acid structure into the polyurethane and utilizing the photoresponsive cis-trans isomerization of the azo structure to regulate the reversible breakage and recombination of the boron-oxygen hexacyclic ring. The visible-light-responsive dynamically covalently cross-linked self-healing polyurethane material prepared by this invention maintains high mechanical strength (16.47 MPa) while exhibiting a strength self-healing efficiency of 95.8% after 8 hours of visible light irradiation, showing broad application prospects in smart materials, anti-corrosion coatings, and other fields.

The invention discloses a low-temperature-resistant organic silicon elastic damping body and a preparation method thereof, and belongs to the field of synthesis of organic polymer materials. The invention relates to a high-efficiency photoinitiator, which is prepared from the following ingredients in parts by weight: 95 to 110 parts of fluorosiloxane-phenylsiloxane segmented copolymers, 25 to 35 parts of boric acid ester end-capped polyurethane prepolymers, 10 to 15 parts of neodymium-containing metal organic frameworks, 20 to 40 parts of azobenzene modified CNT / TiO2, 2 to 4 parts of photoinitiators 1173 and 2 to 3 parts of neodymium acetylacetonate. Ultralow-temperature adaptability, self-repairing and high-modulus coexistence and wide-temperature-range damping stability are achieved through fluorosilicone / phenyl block copolymer molecular design, a borate-neodymium coordination double-dynamic network, stress response filler and a light-heat gradient curing process. The low-temperature-resistant organic silicon elastic damping body prepared by the invention provides a new solution idea for an extreme environment damping material, and has a wide application prospect.

The invention discloses a preparation method of a high-stability photoresponse covalent organic framework membrane and application of the high-stability photoresponse covalent organic framework membrane in selective separation of multiple components. 4-azido azobenzene is prepared by carrying out azido reaction on 4-aminoazobenzene in an acidic aqueous solution, and then a BPTA-TAPB-COF membrane is used as a matrix to prepare the high-stability photoresponse covalent organic framework membrane. 4-azido azobenzene is efficiently grafted to the pore wall of the BPTA-TAPB-COF membrane through a click chemical reaction, the photoresponse covalent organic framework membrane is constructed, and the covalent organic framework membrane can be used for multi-component selective separation and is suitable for multi-component systems with different sizes. The azobenzene group in the pore channel of the prepared Azo-COF membrane is subjected to reversible cis-trans isomerization under the irradiation of ultraviolet / visible light, the response speed is high, and the cycle performance is good; the Azo-COF membrane has good application in the light-operated nanofiltration process, the performance of the Azo-COF membrane is not reduced after the Azo-COF membrane is continuously recycled for 12 days, and the structure of the Azo-COF membrane is kept stable.

The invention belongs to the technical field of pesticides, and particularly relates to azobenzene calix [4] arene derivatives as well as a preparation method and application thereof. The invention discloses a novel azobenzene calix [4] arene derivative prepared by directional modification through an azo reduction reaction based on a calix [4] arene skeleton. The azobenzene calix [4] arene derivative has the characteristics of green environmental protection, accurate and controllable structure and efficient synthesis. After the derivative and a pesticide form a host-guest compound, the activity of the pesticide can be remarkably improved, the bioavailability of the pesticide at an action site is increased, the problem of low efficiency of the traditional pesticide is effectively solved, and the development of target drug resistance is delayed. The technology breaks through the technical bottleneck of nano-carrier environmental toxicity, provides a new thought for developing a multi-target and low-environmental-risk pesticide synergist, and has important significance for realizing pesticide decrement, synergism and resistance treatment.

The invention relates to the technical field of traffic engineering, in particular to a self-repairing type warm-mixing flame-retardant microcapsule and an asphalt mixture, and the microcapsule comprises a core material and a shell material; the composite material is characterized in that the core material comprises a self-repairing component and a warm mixing functional component, the self-repairing component is at least one of sulfur, epoxy resin or recycled asphalt, the warm mixing functional component is an organic wax-montmorillonite composite component, and montmorillonite is modified by a silane coupling agent; the shell material is at least one of ammonium polyphosphate, melamine formaldehyde resin or nano aluminum hydroxide, and nano silicon dioxide particles of which the surfaces are grafted with azobenzene groups are loaded on the surface of the shell material; through cooperation of multiple components, a light, mild and stress triple triggering mechanism is constructed, core material release is accurately regulated, warm mixing, self-repairing and flame-retardant components are mutually promoted, the repairing efficiency and flame-retardant durability are improved, efficient function coupling is achieved, and the pavement performance is optimized.

The invention discloses an anti-blue-light anti-yellowing lens and a vacuum coating process thereof, belongs to the technical field of optical lens manufacturing, and aims to solve the problems of fixed anti-blue-light rate, short anti-yellowing service life, non-environment-friendly process and poor film stability in the prior art. The process core comprises substrate pretreatment, air plasma activation, adhesion promotion layer deposition, dynamic blue light prevention layer deposition, MXene / MOF composite anti-yellowing layer deposition and post-treatment. The lens structurally comprises a base material, a plasma activation layer, a SiO2-ZrO2 adhesive force layer, a ZrO2-Al2O3-Y2O3-azobenzene dynamic blue light prevention layer and a Ti < 3 > C < 2 > T < X >-UiO-66 anti-yellowing layer from inside to outside. According to the invention, the barrier rate of 415-455nm blue light is dynamically adjusted; the air plasma replaces high-purity gas, the gas cost is reduced by 60%, carbon emission is reduced by 40%, and the air plasma is suitable for PC, CR-39 and glass substrates, can be widely applied to daily goggles, myopia glasses and other scenes and has remarkable technical and industrialization values.

This invention discloses a polishing method and apparatus for nickel-based alloys based on photocatalysis and photothickening synergy. It achieves dual-driven processing by simultaneously triggering photocatalytic workpiece surface modification and photo-triggered thickening of the polishing slurry through an integrated dual-light system, realizing surface softening and medium thickening. Composite abrasive particles loaded with TiO2 / ZnO photocatalysts form a low-hardness oxide layer on the nickel-based alloy surface under ultraviolet light irradiation, reducing processing resistance. Precise viscosity control of the polishing slurry is achieved through azobenzene / cinnamic acid photochromic molecules, combined with shear-induced particle agglomeration to form a dual thickening system, improving viscosity stability. This invention solves the technical pain points of work hardening in nickel-based alloys, large viscosity fluctuations in traditional shear-thickening polishing slurries, and poor processing uniformity, improving processing efficiency and workpiece surface quality. It is suitable for efficient and precise machining of difficult-to-machine nickel-based alloys such as Inconel 718 and GH4169.

The invention discloses a generalized pustular psoriasis diagnosis marker based on metabonomics and application of the generalized pustular psoriasis diagnosis marker. The diagnostic marker is prepared from one or more of the following 35 compounds: pyruvic acid, alpha-ketoisovaleric acid, 2-hydroxybutyric acid, 3-hydroxybutyric acid, methane thiophosphoric acid, proline, uracil, tranexamic acid, 4-aminobutyric acid, threonine, scopoletin, dodecanol, N-methyl-L-leucine, L-cysteine-glycine and L-kynurenine. The feed additive is prepared from the following raw materials: 3-hydroxybenzoic acid, allantoin, delta-tocopherol, xylofuranose, glucose-1-phosphoric acid, pyrophosphate, taurine, L-asparagine, phthalic acid, 4-(dimethylamino) azobenzene, 5-tert-butyl-1h-indole-2, 3-dione, quinic acid, glucose, histidine, lysine, palmitic acid, 7-methylguanine, oleic acid and whale acid. The marker can be used for accurately distinguishing patients with generalized pustular psoriasis from healthy people.

The invention discloses a high-temperature-resistant liquid crystal polymer substrate for ultrathin flexible display, which belongs to the technical field of flexible display and comprises a modified liquid crystal polymer and a functional additive dispersed in the modified liquid crystal polymer. The modified liquid crystal polymer is prepared by polymerizing a monomer composition, and is specifically prepared from 38 to 42 parts of p-hydroxybenzoic acid, 28 to 30 parts of 4, 4 '-biphenol, 5.6 to 6.0 parts of terephthalic acid, 4.4 to 5.0 parts of 2, 6-naphthalic acid, 2.7 to 3.3 parts of isophthalic acid, 9 to 11 parts of 2, 2-bis (3, 5-difluoro-4-hydroxyphenyl) hexafluoropropane, 4.5 to 5.5 parts of N, N'-dihydroxypyromellitic diamine, 9 to 11 parts of 9, 9-bis [4-(4-methoxycarbonyl phenoxy) phenyl] fluorene and 1, 2-bis (4-(4-methoxycarbonyl phenoxy) phenyl] fluorene. The component A is prepared from 5.5 to 6.5 parts of 1, 4-cyclohexanedimethanol; the functional additive comprises an azobenzene derivative, a hot acid generator and a hydrogen bond enhancer; through the synergistic effect of a specific monomer combination, a functional additive and an optimization process, the technical bottleneck that heat resistance, transparency, dimensional stability and flexibility of an existing material are difficult to consider at the same time is broken through.

The present disclosure discloses a nickel catalyst of formula (I). The present disclosure also discloses a process of hydrogenation-dehydrogenation coupling catalyzed by catalyst of formula (I). Further, the present disclosure also discloses a process for secondary imine hydrogenation reactions catalyzed by catalyst of formula (I).

The invention provides a preparation method and application of an amorphous zirconium-doped manganese oxide catalyst, and belongs to the field of organic catalytic synthesis. The catalyst is Zr-MnO2-x, and is rich in lattice oxygen with high activity and high stability; x is the molar ratio of Zr to the sum of Mn and Zr, and x is larger than or equal to 0.2 and smaller than or equal to 0.6; zirconium mainly exists in the form of zirconium hydroxide. The preparation method comprises the following steps: slowly dropwise adding a mixed salt solution of a zirconium source and a manganese source into a precipitant under a continuous stirring condition, and carrying out a co-precipitation reaction; after the reaction is completed, standing and aging, carrying out solid-liquid separation and collecting a precipitate; and washing and drying to obtain the amorphous zirconium-doped manganese oxide catalyst which is used for catalyzing aniline and derivatives thereof to synthesize azobenzene compounds. According to the invention, the characteristic of'difunctional lattice oxygen 'with high activity and high stability is introduced through zirconium doping, and the catalyst has the advantages of high activity, high selectivity, wide substrate applicability, excellent stability and reusability and the like when used for catalytic synthesis of azobenzene compounds.

The invention discloses a disposable photo-thermal self-heating wet tissue, a preparation method of the disposable photo-thermal self-heating wet tissue and a wet tissue product, and belongs to the technical field of hygienic products. The disposable photo-thermal self-heating wet tissue sequentially comprises a transparent leakage-proof layer, a photo-thermal layer and a cleaning layer from top to bottom, wherein the photo-thermal layer comprises a three-branch azobenzene / graphene composite fiber woven mesh and a hot melt adhesive dot array, and the hot melt adhesive dot array fixes the three-branch azobenzene / graphene composite fiber woven mesh between the cleaning layer and the transparent leakage-proof layer. The three layers can be compounded and fixed through the hot melt adhesive dot array in the photo-thermal layer of the wet tissue, the energy density of composite fibers of the photo-thermal layer is high, rapid and stable photo-thermal conversion can be achieved through sunlight or blue light irradiation, a traditional chemical heating agent is replaced, the chemical leakage risk is completely eliminated, the temperature is controllable, and the mechanical stability is good; the requirements of one-time cleaning and warm keeping are met, and wide application prospects are achieved.

The application provides a preparation method of a light response thin film material, the light response thin film material, an ultraviolet light monitoring device and a system. The method comprises the following steps: adding 4,4'-dihydroxyhexyloxy azobenzene into a polymer obtained by polymerization of a dihydroxy oligomer and a diisocyanate-based monomer to obtain polyurethane containing an azobenzene group; dissolving the polyurethane and a piezoelectric polymer in a high-boiling-point solvent to obtain an electrospinning solution; and performing electrospinning on the electrospinning solution to obtain the light response thin film material. The 4,4'-dihydroxyhexyloxy azobenzene containing a six-carbon spacer is added as a chain extender into the polymer of the dihydroxy oligomer and the diisocyanate-based monomer to obtain the ultraviolet light response polyurethane containing the azobenzene group. Furthermore, the light response thin film material with better flexibility, better mechanical properties and good ultraviolet light response can be prepared by combining the polyurethane and the piezoelectric polymer. The preparation process of the light response thin film material is simple, and the preparation cost is low.

The invention provides a compound for regulating and controlling a TRPV1 ion channel. The structural formula of the compound is as shown in formula I. The invention also provides application of the compound in preparation of a medicine for regulating and controlling the TRPV1 ion channel. The invention provides a pharmaceutical composition with an anti-inflammatory effect, the pharmaceutical composition comprises the compound, and pharmaceutically acceptable auxiliary materials or auxiliary components are added to prepare a pharmaceutically common preparation. Compared with azobenzene, the compound has the advantages that the illumination wavelength is increased, the illumination wavelength is 660 nm, a TRPV1 targeted photosensitizer is used, a channel is activated by using a low-energy near-infrared light'precise key ', depth, safety and reversibility are considered, and the anti-inflammatory effect of the compound is obvious.

The invention belongs to the technical field of organic ultrathin nanomaterials, and particularly relates to a photoresponse type polymer ultrathin nanosheet as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) adding dicyclohexylcarbodiimide, N-hydroxysuccinimide, N, N-diisopropylethylamine and 4-carboxyl phenylboronic acid pinacol ester into a solvent, and reacting to obtain an intermediate product; (2) carrying out heating reaction on the intermediate product, triethylene glycol and a catalyst to obtain a phenylboronic acid pinacol ester derivative; (3) adding 4, 4-dibromo azobenzene, a phenylboronic acid pinacol ester derivative, a palladium catalyst and potassium carbonate into a solvent for reaction to obtain an amphiphilic alternating copolymer; and (4) dispersing the amphiphilic alternating copolymer in a solvent for self-assembly to obtain the amphiphilic alternating copolymer. According to the invention, a photoresponse group azobenzene structure is introduced into a polymer main chain, so that the ultrathin organic material is endowed with a unique photoresponse characteristic; the method is simple and easy to implement, good in repeatability and high in stability.

The invention discloses a generalized pustular psoriasis diagnosis marker based on metabonomics and application of the generalized pustular psoriasis diagnosis marker. The diagnostic marker is prepared from one or more of the following 35 compounds: pyruvic acid, alpha-ketoisovaleric acid, 2-hydroxybutyric acid, 3-hydroxybutyric acid, methane thiophosphoric acid, proline, uracil, tranexamic acid, 4-aminobutyric acid, threonine, scopoletin, dodecanol, N-methyl-L-leucine, L-cysteine-glycine and L-kynurenine. The feed additive is prepared from the following raw materials: 3-hydroxybenzoic acid, allantoin, delta-tocopherol, xylofuranose, glucose-1-phosphoric acid, pyrophosphate, taurine, L-asparagine, phthalic acid, 4-(dimethylamino) azobenzene, 5-tert-butyl-1h-indole-2, 3-dione, quinic acid, glucose, histidine, lysine, palmitic acid, 7-methylguanine, oleic acid and whale acid. The marker can be used for accurately distinguishing patients with generalized pustular psoriasis from healthy people.

The invention discloses a nano aggregate as well as a preparation method and anti-breast cancer application thereof. The nano aggregate comprises a drug-drug conjugate AI (formed by dehydration condensation of ATRA and IRI), an anoxic response type prodrug PAC (formed by coupling of CPUL119 and PEG through an azobenzene connecting bond), and a targeting molecule DT (DSPE-PEG2000-Try), wherein the drug-drug conjugate AI is formed by dehydration condensation of ATRA and IRI; the anoxic response type prodrug PAC is formed by coupling of CPUL119 and PEG through an azobenzene connecting bond; the preparation method comprises the following steps: respectively dissolving AI, PAC and DT in an organic solvent, dropwise adding an AI solution into deionized water, stirring for the first time, adding a PAC solution and a DT solution, and stirring again to obtain the nano aggregate. The nano aggregate disclosed by the invention has a uniform particle size of 90-130 nm and a high drug loading capacity (greater than 80%), stably exists in a physiological environment, and shows excellent tumor targeted accumulation capacity; the medicine is released through hypoxia / pH / esterase triple response, chemotherapy (IRI), differentiation therapy (ATRA) and ferroptosis therapy (CPUL119) are coordinated, and the killing effect on breast cancer cells and stem cells is remarkably enhanced.

The invention belongs to the technical field of semiconductor materials, and provides an azobenzene-based cross-linked polyion liquid ultraviolet photoelectric conversion material as well as a preparation method and application thereof. The material is formed by polymerizing an azobenzene photosensitive unit and an ionic liquid dipole unit, the ionic liquid dipole unit takes a trimer structure as a crosslinking core, and the tail end of the structure is grafted with an ionic liquid dipole monomer. According to the ultraviolet photoelectric device made of the material, on the premise that the electrical property is kept, the resistance of the device to mechanical stress (such as bending and pressure) is greatly improved, and the dimensional stability is improved.

The present application relates to a kind of low-dosage process and application of nitrobenzene liquid phase hydrogenation to aniline, by monitoring the position of foam layer on the top of sieve plate tower type hydrogenation reactor, control gas phase residence time, and then reduce the loss amount of through the reactor top demister.Less temperature reduction is realized by the catalyst recovery tank of gas phase aniline through the tank internal cooling coil, promote the liquid drop wrapped catalyst to be further intercepted by wire mesh demister, so as to reduce the loss amount of catalyst.In addition, by monitoring the azobenzene in aniline slurry, N-cyclohexyl aniline can accurately evaluate the overall activity of system catalyst, timely adjust catalyst control strategy, so as to realize the great benefit of catalyst unit consumption to 1-2g / t aniline.

The invention provides a device for selectively capturing and separating lithium ions and a preparation method thereof, a roughened copper net is used as a substrate, mercapto polyoxyethylene azobenzene spirobipyridine is used as a capturing agent, and the capturing agent and the roughened copper net are combined through a Cu-S bond, so that the device for selectively capturing and separating lithium ions is obtained. And forming the Azo-2P-PEGn-SCu device which is supported by the roughened copper mesh and of which the surface is covered with the Azo-2P-PEGn-S fragments. The selective capture type lithium ion separation device provided by the invention has relatively good combination selectivity with the lithium salt, the separation of the lithium element does not depend on any crystallization process, and the separation percentage of the Li element is not less than 87%. The Azo-2P-PEGn-SCu device provided by the invention is regenerated by adopting light irradiation, no three wastes are formed in the regeneration process, and the regenerated Azo-2P-PEGn-SCu device still has relatively good selectivity on the lithium salt.

The application discloses an adsorbent for removing protein-bound toxins and middle-molecular toxins and a preparation method thereof, and belongs to the technical field of polymer materials, and comprises the following steps: polystyrene-based white ball preparation, amine immobilization and film coating.The application has the beneficial effects that: a kind of adsorbent capable of adsorbing protein-bound toxins and middle-molecular toxins is prepared by adding a pore-forming agent under the participation of styrene monomers, polyvinyl benzene series, glycidyl methacrylate and 4,4'-bis(methacrylamido)-azobenzene, the adsorption effect is good, and the adsorbent has high selectivity; the process method is simple, green and environment-friendly; glycidyl methacrylate and modified cyclodextrin are added, the hydrophilicity of the adsorbent is enhanced, the blood compatibility of the adsorbent is improved, and the adsorption effect of the adsorbent is enhanced through amine group immobilization.

The application discloses an azobenzene polymer microsphere cluster, a preparation method and application thereof, and can assemble and arrange multiple monodisperse azobenzene polymer microspheres containing reactive end group groups in a preset arrangement mode, then irradiates by light, fusion occurs between two adjacent monodisperse azobenzene polymer microspheres, and the fused part is covalently connected through a chemical cross-linking reaction participated by the reactive end group groups, so that a stable azobenzene polymer microsphere cluster can be obtained, and the azobenzene polymer microsphere cluster also has light response characteristics, and is easy to adjust and realize a configuration, and is beneficial to application in the fields of optical switches, optical information storage materials, biological molecule active light regulation materials, nonlinear optical materials or integrated optical materials and the like.

The application belongs to the technical field of semiconductor materials, and provides a cross-linked polyionic liquid ultraviolet photoelectric conversion material based on azobenzene and a preparation method and application thereof.The material is polymerized from an azobenzene photosensitive unit and an ionic liquid dipole unit; the ionic liquid dipole unit is a trimer structure as a cross-linking core, and ionic liquid dipole monomers are grafted at the ends of the structure. The ultraviolet photoelectric device made of the material greatly increases the resistance of the device to mechanical stress (such as bending and pressure) and improves the dimensional stability on the premise of maintaining electrical properties.

The invention relates to an imidazole bromide azobenzene ionic liquid catalyst as well as a synthesis method and application thereof. According to the technical scheme, the preparation method comprises the following steps: diazotizing 2, 6-diethylaniline at 0-5 DEG C, and then carrying out coupled reaction on the diazotized 2, 6-diethylaniline and 3, 5-dimethyl sodium phenolate to obtain 4-hydroxy-2, 6-dimethyl-2 ', 6'-diethylazobenzene; the preparation method comprises the following steps: carrying out a nucleophilic substitution reaction on 4-bromoethoxy-2, 6-dimethyl-2 ', 6'-diethylazobenzene and 1, 2-dibromoethane to obtain an intermediate 4-bromoethoxy-2, 6-dimethyl-2 ', 6'-diethylazobenzene; and finally, reacting the intermediate with excessive N-methylimidazole to synthesize the imidazole bromide azobenzene ionic liquid catalyst, namely 4-(N-methylimidazole bromide)-ethoxy-2, 6-dimethyl-2 ', 6'-diethyl azobenzene. The method has the characteristics of simple synthesis method, good water solubility of the catalyst, short reaction time at room temperature, high catalytic efficiency, green and environment-friendly catalytic reaction with water as a solvent, easy separation of products, recyclability of the catalyst and the like.

A green synthesis method of azoxybenzene compounds, in an organic solvent, using aromatic amine or aromatic heteroamine as raw material, using an oxidant and a catalyst to form a reaction system, selectively oxidizing the aromatic amine into the corresponding azoxy compound; wherein the catalyst is one or several of NaOAc, sodium formate, KF, NaF, CsF, CaF2 and R''4NF, wherein R'' is one of alkyl, methyl, ethyl and butyl; the catalyst used in the application has low cost, high activity, good selectivity and small environmental pollution compared with the metal catalyst of the prior art, and conforms to the green environmental protection concept; at the same time, the catalyst has small dosage, and does not need to consider catalyst recovery treatment and other problems, greatly simplifying the operation steps.

The invention discloses a high-performance silicon carbide coating embedding process, and relates to the technical field of static pressure graphite coating materials. The preparation method comprises the following steps: firstly, weighing SiC powder, Si powder and carbon powder according to a specific mass ratio, and carrying out ball milling and mixing to prepare embedding powder; the preparation method comprises the following steps: embedding a graphite matrix into embedding powder, and carrying out argon protection and temperature programming sintering to prepare a SiC coating modified graphite matrix; then preparing dendritic polysilazane steeping liquor containing azobenzene groups, putting the modified matrix into a vacuum steeping tank, carrying out ultraviolet irradiation assisted vacuum steeping and gradient drying, and then carrying out temperature programming curing, so as to obtain the composite coating modified graphite material. According to the process, the problems that a traditional embedding method has many coating defects and the mechanical property of a matrix is reduced are solved, through deep penetration repairing of photosensitive dendritic polysilazane, the coating density and the interface bonding strength are improved, and the obtained material has excellent mechanical and thermal properties and structural stability and meets the requirement of high-end working conditions.

The invention relates to the technical field of metal material protection, in particular to a surface rust-proof treatment method for a stator punching sheet, which comprises the following steps: performing plasma treatment by using argon-hydrogen mixed gas to form a nano rough structure, and immersing into simulated body fluid to form a biomimetic mineralization coating film; the preparation method comprises the following steps: carrying out supramolecular self-assembly on calixarene derivatives and beta-cyclodextrin, and then coating a gradient composite coating containing zinc-aluminum powder primer, a carbon nanotube transition layer and MXene finish paint; and finally, an organic silicon hole sealing agent containing azobenzene is sprayed, ultraviolet irradiation is carried out, a photoresponse self-cleaning layer is formed, and regulation and control processes such as microwaves and magnetic fields are adopted in all the steps. According to the method, a gradient composite protection layer and a light response self-cleaning system are constructed through cooperation of multiple technologies such as plasma, biomimetic mineralization and supramolecular self-assembly; the anti-rust performance of the stator punching sheet is remarkably improved, the salt spray test duration is longer than 2000 hours, the stator punching sheet has the characteristics of environmental protection and high efficiency, and the upgrading of a motor manufacturing technology is promoted.

The application relates to a preparation method and application of an azobenzene-based pH / UV intelligent response information reversible load hydrogel robot, and belongs to the technical field of hydrogels. The application aims to solve the problem that a light response information load material cannot be rewritable, high-strength, fast in response speed and multifunctional. The azobenzene-based pH / UV intelligent response information reversible load hydrogel robot is prepared by the following steps: synthesizing 4-hydroxy azobenzene by a diazo method; taking 4-hydroxy azobenzene, potassium carbonate, 6-bromohexyl acetate and acrylamide as raw materials; adopting Williamson ether reaction, nucleophilic substitution reaction, ester hydrolysis and amide reaction to prepare azobenzene-based gel monomers; taking acrylamide and the azobenzene-based gel monomers as a gel matrix; taking N,N'-methylene bisacrylamide as a crosslinking agent; and adopting free radical polymerization, hydrogen bond crosslinking and hydrophobic crystallization crosslinking strategies to prepare the azobenzene-based pH / UV intelligent response information reversible load hydrogel robot, which is applied to intelligent information load and rewritable code transmission.

The invention provides a universal, simple and extensible intramolecular hydrogen bond activation strategy for preparing the covalent organic framework material by utilizing a Michael addition method. The material can be efficiently prepared within an extremely short time, and has the characteristics of high crystallinity, high porosity, high stability, rich functional groups and the like, in addition, the COF material can be very conveniently subjected to structure and functional design, and various functional groups can be easily introduced in advance or after modification. Due to the unique structure, rapid gram-scale synthesis can be realized through a simple amplification experiment, and high crystallinity is still realized. Wherein the COF rich in azobenzene groups has a proper pore structure and good solar energy absorption and photo-thermal conversion performance, can provide a proper catalytic microenvironment temperature under illumination after being loaded with lipase, realizes catalytic resolution of a chiral substrate, and has a great industrial practical application prospect.

The application discloses a method for preparing 2-nitro-2'-hydroxy-5'-tert-octyl azobenzene in a water medium system. The method controls the molar dosage ratio of tert-octyl phenol and NaOH in an emulsification process, controls the mass concentration of tert-octyl phenol in an emulsion, controls the molar dosage ratio of o-nitroaniline and tert-octyl phenol, and controls the mass dosage ratio of an anionic high polymer surfactant and a non-ionic surfactant, so that 2-nitro-2'-hydroxy-5'-tert-octyl azobenzene with high purity is prepared. Compared with a traditional synthesis process, the method uses water as a reaction medium, avoids the use of an organic solvent, effectively reduces the difficulty in treating subsequent wastewater, and achieves a target product yield of more than 95% and a purity of 91.79%-94.52%.