105 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 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 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 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 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 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 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.

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 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 invention relates to the technical field of procyanidine extraction, and provides a green extraction method of procyanidine in grape pips, which comprises the following steps: carrying out physical wall breaking treatment on dry grape pips; mixing the pretreated grape seeds with the eutectic solvent precursor liquid, and carrying out solid-liquid separation to obtain a clear extracting solution; adding an azobenzene chitosan solution into the clarified extracting solution, mixing under a dark condition, irradiating by adopting light with a first specific wavelength to form a compound precipitate, and separating to obtain a precipitate; dispersing the compound precipitate in an aqueous medium, irradiating with light with a second specific wavelength to release the proanthocyanidins from the compound, separating to obtain a supernatant containing the proanthocyanidins, and recycling regenerated azobenzene chitosan; and concentrating and drying the supernate to obtain a procyanidine product. According to the technical scheme, the extraction efficiency and purity of the procyanidine are improved, and efficient selective precipitation separation and mild release are realized by utilizing the photoresponsive carrier.

The invention belongs to the technical field of solar-blind ultraviolet light detection materials, and relates to a full-flexible solar-blind ultraviolet light detection material and a preparation method and application thereof, and the full-flexible solar-blind ultraviolet light detection material comprises a down-conversion luminescent material, an azobenzene polymer and a piezoelectric polymer. The excitation-emission characteristic of the rare earth doped down-conversion particles is utilized, a light absorption window of azobenzene elements and the wavelength conversion characteristic of the down-conversion light-emitting particles are accurately matched, high-energy solar-blind ultraviolet light is converted into low-energy long-wave ultraviolet light capable of enabling azobenzene molecules to generate photoisomerization, an azobenzene polymer is driven to generate photoisomerization, and the light-emitting efficiency of the azobenzene polymer is improved. The film fiber network is driven to microscopically shrink and the piezoelectric polymer is excited to output an electric signal; the operation is simple and convenient, the fiber film composite material with a microstructure can be continuously manufactured in a large area, and the preparation of the large-area, fast-response and high-stability intrinsic flexible solar-blind ultraviolet detection material and the device thereof is realized.

The invention discloses a method for immobilizing cellulase by using a Ti3O5-based composite photothermal conversion material and application. The material is composed of a Ti3O5 core coated with polydopamine and a glycidyl methacrylate modified azobenzene polymer brush grafted on the surface of the Ti3O5 core. The preparation method comprises the following steps: forming a PDA layer on the surface of Ti3O5 through dopamine auto-polymerization, synthesizing a gAZO polymer brush, and finally modifying the gAZO onto the PDA-coated Ti3O5 through photo-initiation grafting reaction. The material disclosed by the invention can realize local temperature regulation and control at 35-50 DEG C under the irradiation of visible light of 100-150 mW / cm; when being used for immobilizing cellulase, the immobilized cellulase can be locally heated through illumination in the synchronous saccharification and fermentation process, so that the problem that the optimal saccharification and fermentation temperatures are not matched is solved, and the SSF efficiency is improved; the process is simple, and a novel controllable temperature control strategy is provided for the bio-refinery process.

The invention belongs to the technical field of organic synthesis, and particularly relates to a method for photochemically synthesizing a benzo [c] cinnoline compound through an azo compound. The method for photochemically synthesizing the benzo [c] cinnoline compound through the azo compound comprises the following steps that an azobenzene compound, lewis acid and an oxidizing agent are added into an organic solvent and react under the condition of white light irradiation at the temperature of 40-50 DEG C, water quenching is conducted after the reaction is completed, then separation and purification are conducted, and the product benzo [c] cinnoline compound is obtained. The method has the advantages of simple operation, low toxicity of reactants, no need of addition of noble metals, easy separation of products and high yield.

The invention belongs to the technical field of biomedical materials, and particularly relates to an intelligent delivery patch based on epidermal stem cell adhesion regulation and a preparation method of the intelligent delivery patch. The intelligent delivery patch is prepared from the following raw materials in parts by weight: 1-5 parts of a drug-loaded compound, 8-15 parts of methacrylated gelatin, 0.5-2 parts of an enzyme response cross-linking agent, 0.3-1.5 parts of a force sensitive linking ligand, 0.1-1 part of a cell adhesion ligand and 0.05-0.2 part of LAP, drug-loaded nanoparticles of which the surfaces are modified with beta-cyclodextrin are anchored through a hydrogel network containing an azobenzene group, MMP sensitive peptide and RGD peptide, and the drug-loaded nanoparticles and the RGD peptide are combined to form the intelligent delivery patch. Efficient capture and enzyme response desorption of epidermal stem cells are achieved through synergism of MMP sensitive peptide and RGD peptide, a force sensitive release system is constructed through a supramolecular subject and object formed by beta-cyclodextrin and azobenzene, long-acting delivery is achieved by responding to mechanical stimulation while burst release of drugs is inhibited, and wound repair is promoted synergistically.

This invention discloses a composite layer and its application, relating to the technical field of marine engineering protective materials. A composite layer includes, from top to bottom, a photochromic stealth layer, an interface coupling layer, and a toughened and blast-resistant layer. The photochromic stealth layer comprises a polymer matrix and photosensitive liquid crystal microcapsules embedded in the polymer matrix. The photosensitive liquid crystal microcapsules are filled with an azobenzene-based liquid crystal material, and a conductive layer is disposed on the surface of the photosensitive liquid crystal microcapsules. The interface coupling layer includes, from bottom to top, a flexible layer, a transition layer, and a rigid layer. The shear-toughened and blast-resistant layer comprises an epoxy resin matrix, a biomimetic neural bundle network embedded in the epoxy resin matrix, and a shear-thickening liquid. The composite layer of this invention possesses excellent optical stealth performance, impact resistance, and environmental adaptability, making it suitable for dynamic camouflage and impact protection of deep-sea equipment, underwater vehicles, and marine engineering structures.

The invention discloses a nickel base alloy polishing method and device based on photocatalysis-photothickening synergy. An integrated dual-light system synchronously triggers photocatalytic workpiece surface modification and light-triggered polishing solution thickening, and dual-drive machining of surface softening and medium thickening is achieved. The composite abrasive particles loaded with the TiO2 / ZnO photocatalyst are adopted, a low-hardness oxide layer is formed on the surface of the nickel-based alloy under ultraviolet irradiation, and the machining resistance is reduced; the accurate regulation and control of the viscosity of the polishing solution are realized through azobenzene / cinnamic acid photochromic molecules, and a double-thickening system is formed by cooperating with shear-induced particle aggregation, so that the viscosity stability is improved. According to the invention, the technical problems of work hardening of the nickel-based alloy, large viscosity fluctuation of a traditional shear thickening polishing solution and poor processing uniformity are solved, the processing efficiency and the workpiece surface quality are improved, and the method is suitable for efficient precision processing of Inconel 718, GH4169 and other difficult-to-process nickel-based alloys.

The invention belongs to the technical field of organic compound preparation, and discloses a photochemical preparation method of a tetraphenylhexahydrotetrazine compound. The preparation method comprises the following steps: mixing an azobenzene compound, biborate, a carbon source and an organic solvent, wherein the carbon source comprises alkyl aldehyde or nitroalkane; and reacting under light irradiation, removing the organic solvent, and separating and purifying to obtain the compound. The tetraphenylhexahydrotetrazine compound with high yield can be prepared by taking an azobenzene compound as a raw material, taking aldehyde or nitroalkane as a carbon source, adding bis (borate), and carrying out illumination in the absence of a metal catalyst within the reaction time of less than 1 hour. Moreover, the preparation method disclosed by the invention shows wide functional group compatibility, so that various types of azobenzene compounds can be converted into tetraphenylhexahydrotetrazine compounds, and the application prospect is wide.

The application belongs to the technical field of fluorescent analysis and detection, and particularly relates to a tridentate Schiff base compound and a preparation method and application thereof. 2 The formylhydrazine Schiff base compound is widely applied in coordination chemistry, and a parent structure thereof can be used to better study the transformation of a complex under light stimulation, and the imino group also has good photoisomerization performance, at this time, the light stimulation can catalyze the ligand to produce more rich coordination modes, so the isomerization phenomenon of the compound under the action of ultraviolet light is tested, and the application of the compound in a colorimetric chemical sensor is studied. Further research is conducted on whether the compound has different ion selectivity after the conversion configuration under the action of ultraviolet light and the change of the coordination mode, and finally, the complex of the ligand Ni 2+ , Cu 2+ metal is synthesized.

The invention discloses a diaryl hydrazine compound and a preparation method thereof, and the preparation method comprises the following steps: mixing an azobenzene compound, an alkyl NHPI ester reagent, a photosensitizer, an alkaline reagent and a solvent, and reacting under the irradiation of visible light to obtain the diaryl hydrazine compound, wherein the photosensitizer is one or a mixture of two of 2, 4, 5, 6-tetrakis (carbazole-9-yl)-1, 3-dicyanobenzene, di [2-(2, 4-difluorophenyl)-5-trifluoromethylpyridine] [2-2 '-bis (4-tert-butylpyridine)] iridium hexafluorophosphate, and the solvent is one or a mixture of two of 2, 4, 5, 6-tetrakis (carbazole-9-yl)-1, 3-dicyanobenzene and di [2-(2, 4-difluorophenyl)-5-trifluoromethylpyridine] [2-2'-bis ( And the alkaline reagent is one or a mixture of more of N, N-diisopropylethylamine, potassium phosphate and 1, 8-diazabicyclo [5.4. 0] undec-7-ene. The preparation method disclosed by the invention has the advantages of easily available raw materials, simplicity in operation, mild reaction, wide substrate applicability and the like.

A composite electrode for absorbing and desorbing phosphates in a liquid includes a carrier, and a composite laminated structure including a layered double hydroxide unit which includes at least two layered double hydroxide layers, and an azobenzene unit which includes at least one azobenzene layer. The at least one azobenzene layer of the azobenzene unit contains an azobenzene component. When the azobenzene unit is subjected to irradiation with an ultraviolet light, the azobenzene component in the at least one azobenzene layer of the azobenzene unit has a cis-structure, so that the composite laminated structure is in an absorption state. When the azobenzene unit is subjected to irradiation with a visible light, the azobenzene component in the at least one azobenzene layer of the azobenzene unit has a trans-structure, so that the composite laminated structure is in a desorption state.

The invention discloses a trans-azobenzene compound and an electroluminescent device thereof, and belongs to the technical field of organic luminescent materials and semiconductors. According to the azobenzene compound, electron donating substituent groups and electron withdrawing substituent groups are substituted at 4 positions and 4'positions of two benzene rings of trans-azobenzene, so that an energy barrier of isomerization from trans-azobenzene to cis-azobenzene is improved, configuration transformation is not easy to occur in the preparation and use processes, meanwhile, the steric hindrance of azobenzene is also reduced, and the stability of the azobenzene compound is improved. And the molecular structure is more symmetrical and stable. When the azobenzene compound is applied to the electroluminescent device as a guest material, the driving voltage of the electroluminescent device can be effectively reduced, the efficiency of the device is improved, and the service life of the device is prolonged.

The application discloses a kind of dirt-resistant protective fabric and preparation method thereof, it is related to fabric technical field.The application is prepared when dirt-resistant protective fabric, six chloro-cyclotriphosphazene, p-hydroxybenzaldehyde reaction is obtained intermediate;Intermediate, 2-furfurylamine reaction is obtained composite flame retardant;Polyester chip, composite flame retardant is mixed after extruding granulation, and then melt spinning is prepared polyester fiber;Polyester fiber is woven into polyester fabric by textile equipment;Vinyl rare earth europium complex, vinyl azobenzene, dibenzoyl peroxide, toluene are prepared into mixed finishing liquid;Anti-fouling finishing agent, deionized water are prepared into anti-fouling finishing liquid;Polyester fabric is sequentially finished with mixed finishing liquid, anti-fouling finishing liquid, and dirt-resistant protective fabric is prepared.The dirt-resistant protective fabric prepared by the application has the advantages of dirt resistance, flame retardance and anti-uv aging.

Disclosed in the present invention are a chiral azobenzene polymer crosslinked thin film and preparation method therefor and application thereof. The present invention relates to a novel super-molecular chiral construction and chiral immobilization method based on an achiral side chain type azobenzene polymer thin film. According to the present invention, limonene steam is utilized to perform chiral induction on a polymer thin film at a high temperature, and then formaldehyde steam is utilized to perform acetal reaction with hydroxyl in an acidic environment to achieve crosslinking; and then differences in the stability of the super-molecular chirality of the polymer thin film before and after crosslinking is studied under the conditions of light, heat and good solvent dissolution, and the self-repairing properties of microcosmic helical chirality is researched. The crosslinked thin film prepared by the present invention has good chiral properties, and excellent solvent resistance, heat resistance, and self-repairing properties.

The application discloses a preparation method and application of a double-stimulus-responsive driver film, and belongs to the field of double drivers. The application takes azobenzene monomer and isocyanate as raw materials, obtains a polymer solution through a step-by-step addition polymerization reaction, and pours the polymer solution in a polytetrafluoroethylene mold to obtain a driver film with light / humidity double-stimulus responsiveness. Due to the reversible molecular configuration transformation of azobenzene and the great difference in film hygroscopicity, the driver film has a quick and sensitive reversible bending deformation behavior under light and humidity stimulation, and has important application value in the field of intelligent bionics.

This invention relates to the field of biomaterials and stimulus-responsive materials, specifically to a sodium alginate phase change material with triple stimulus-responsive properties and its preparation method. The sodium alginate phase change material of this invention is an ion-liquid crystal biomaterial obtained by mixing sodium alginate and a double-chain azobenzene quaternary ammonium salt compound in an aqueous phase, followed by shaking, centrifugation to remove the supernatant, and freeze-drying. The sodium alginate phase change material prepared by this invention exhibits phase changes under three external stimuli: light, humidity, and force. The sodium alginate phase change material prepared by this invention can be used as an advanced intelligent self-healing material in biological and biomedical fields.