1791results about "Tenebresent compositions" patented technology

The invention belongs to the technical field of novel fluorescent materials, and particularly discloses application of a mechanical color change pyrenyl derivative in latent fingerprint fluorescence imaging and extraction. The mechanical color-changing pyrenyl derivative can be selectively combined with fingerprint residual substances under the excitation of ultraviolet light through the unique fluorescence response characteristic, so that potential fingerprints form high-contrast fluorescence imaging on smooth or rough surfaces (such as glass, metal, plastic and the like), and the mechanical color-changing pyrenyl derivative is compatible with conventional camera equipment to realize rapid acquisition. The compound design is based on a modular synthesis route, and has the advantages of simple and convenient synthesis process, controllable raw material cost, high reaction yield and the like. The product has excellent thermal stability and chemical stability, can be stored at normal temperature and does not need special treatment, and the practical application threshold is greatly reduced. Compared with a traditional fingerprint developing technology, the method has remarkable breakthroughs in the aspects of sensitivity, substrate adaptability and operation convenience, and an efficient, economical and environment-friendly novel solution is provided for the fields of criminal investigation, forensic identification and the like.

The invention provides a liquid crystal dopant with thermal-photoelectric triple response and an application of the liquid crystal dopant on intelligent glass. The molecular formula of the liquid crystal dopant is shown as a formula (1). The liquid crystal dopant is doped in a liquid crystal material, can respond to temperature, illumination and an electric field at the same time by combining the unique optical and electrical characteristics of the liquid crystal material, and adapts to various environment requirements; a plurality of optical states can be provided to meet energy-saving requirements in different scenes; the light modulation rate is high, the haze is large, and the privacy protection function is strong; the material is simple in preparation process, few in synthesis steps, good in stability and low in raw material cost, can be applied to the fields of residences, commercial buildings, automobiles, airplane windows and the like, and has a wide application prospect.

An electrochromic device includes: a first insulating substrate; a first conducting layer disposed over the first insulating substrate; an electrochromic layer disposed over the first conducting layer, wherein the electrochromic layer comprises an electrochromic polymer having a polymer backbone comprising one or more meta-conjugated linkers (MCLs) and one or more aromatic moieties (Ars), wherein each of the one or more MCLs is partially conjugated with one of the one or more Ars at a meta position of the one or more MCLs; an electrolyte layer disposed over the electrochromic layer; a second conducting layer disposed over the electrolyte layer; and a second insulating substrate disposed over the second conducting layer. A thickness of the electrochromic layer is from 10 nm to 1500 nm resulting in transmittance of 85%-99.9% at a wavelength of 550 nm at a neutral state of the electrochromic layer.

The invention relates to the technical field of thermochromic materials, and discloses a thermochromic phase change energy storage microcapsule as well as a preparation method and application thereof. The thermochromic phase change energy storage microcapsule comprises the following preparation raw materials: a core material, a Pickering emulsion template and a wall material, the core material comprises the following components: a leuco agent, a color developing agent and a phase change material; the stable particles of the Pickering emulsion template comprise cellulose nanocrystals; the wall material comprises a resin prepolymer. According to the thermochromic phase change energy storage microcapsule, the cellulose nanocrystals serve as Pickering emulsion stable particles, raw materials are easy to obtain, and the thermochromic phase change energy storage microcapsule is good in stability, good in coating effect, environmentally friendly, free of pollution, sensitive in temperature response, reversible in color change, wide in color change and energy storage temperature interval, good in thermal stability of materials and good in energy storage performance. The preparation method of the material is simple in steps and easy to operate, large-scale production is easy to realize, and the thickness of the microcapsule shell layer can be changed by changing the adding amount of the resin prepolymer.

The invention discloses a compound containing a urea structure as well as a preparation method and application of the compound in a color developing agent, and relates to the technical field of color developing agents. The compound containing the urea structure is a # imgabs0 # structure as shown in a formula 1. The compound containing the urea structure is synthesized through multiple steps of Suzuki reaction, bromination reaction and substitution reaction. The compound is used as an electron donor to be applied to a thermosensitive color development system and forms a color development composition with a phenolic compound and an acidic material, and the activation temperature is as low as 60-120 DEG C. The ureido structure stabilizes a reaction intermediate through a hydrogen bond network, enhances the electron transfer efficiency, and significantly improves the color developing sensitivity; the aryl / heteroaryl substituent optimizes the color contrast through the conjugation effect, and meanwhile, the synergistic effect of the hot-melt filler ensures the stability of the system. Compared with a traditional color developing agent, the color developing agent has the advantages of low-temperature activation, high color developing intensity and excellent weather resistance, is suitable for the fields of thermal printing, anti-counterfeiting materials and the like, and overcomes the defects of high reaction temperature and insufficient stability in the prior art.

The invention provides a crystalline supramolecular polymer based on snap ring aromatic hydrocarbon. The polymer is obtained by self-assembling snap ring aromatic hydrocarbon (CLP) and a naphthalimide derivative (NDI-8) through a subject and an object. The crystalline supramolecular polymer (NDI-8 (at) CLPalpha) can fully utilize the synergistic effect of a plurality of weak interactions, so that the charge transfer interaction between molecules can be remarkably enhanced very easily. The crystalline supramolecular polymer constructed based on charge transfer shows excellent gasochromic performance. The p-xylene in the NDI-8-coated CLPalpha p-xylene isomer has efficient identification and detection capability, the color is changed from purple to light pink, and a wide application prospect is provided for the development of stimuli-responsive materials.

The temperature sensing material of the present invention contains 100 parts by mass of a thermoplastic resin (A) having its density, MFR and durometer A hardness in specific ranges, 10 to 100 parts by mass of a compound (B) having a flash point of 155° C. or higher, and 1.5 to 20 parts by mass of a porous inorganic compound (C) having an oil absorption of 4.0 g / g or more, in which a content of the compound (B) is more than 200 parts by mass and less than 700 parts by mass relative to 100 parts by mass of the porous inorganic compound (C), and the temperature sensing material has specific optical properties.

The invention discloses an iron powder induction thermochromic polydimethylsiloxane fiber and a preparation method thereof.The preparation method comprises the steps that iron powder and thermochromic microcapsules are added into a mixed emulsion of polydimethylsiloxane and a curing agent, so that the polydimethylsiloxane fiber is endowed with a quick-response thermochromic function; and remote non-contact rapid temperature and color change control is realized. Compared with a traditional temperature change material, the fiber prepared through the method has higher response speed and higher flexibility and plasticity, the application scene is expanded, the fiber can be used in the fields of textiles, intelligent clothes, medicine, temperature control and the like, and the intelligence and application value of the material are increased.

The invention discloses high-strength hydrogel with high Tlum and delta Tsol and adjustable tau c as well as a preparation method and application of the high-strength hydrogel. The hydrogel disclosed by the invention is obtained by copolymerizing raw materials including a hydrophobic monomer and a hydrophilic monomer, wherein the hydrophobic monomer is a hydrophobic monomer containing a polyether structure; the hydrophilic monomer is a monomer containing at least one hydrophilic group of carboxyl, hydroxyl and amino. The hydrogel provided by the invention is obtained by copolymerization of a hydrophobic monomer and a hydrophilic monomer, wherein the side chain of the hydrophobic monomer contains a polyether structure. Wherein hydrophobic polyethylene glycol side groups in the hydrogel are self-assembled to form micelles, the micelles are uniform and transparent and have very good light transmittance before the phase change temperature, phase separation occurs when the temperature exceeds tau c to form a polymer-rich phase and a water-rich phase, light is scattered between the two phases, the light transmittance of the hydrogel is greatly reduced, and the light transmittance of the hydrogel is greatly improved. Therefore, the solar cell has excellent thermochromism capability, and the sunlight modulation capability is effectively improved.

Electrochromic gels that include 20 to 99 wt. % of a polar solvent, 0.5 to 25 wt. % of a rheology modifying agent, and 0.5 to 20 wt. % of an electrochromic material. The rheology modifying agent is soluble in the polar solvent and forms a gel at ambient conditions when dissolved.

Some variations provide a photochromic heterostructure comprising: first semiconductor nanoparticles that have an average first-nanoparticle effective diameter from 1 nanometer to 20 nanometers, wherein the first semiconductor nanoparticles are not doped; and second semiconductor nanoparticles that have an average second-nanoparticle effective diameter from 1 nanometer to 60 nanometers, wherein the second semiconductor nanoparticles are doped with one or more transition metals, wherein the second semiconductor nanoparticles have a bandgap energy that is higher than the bandgap energy of the first semiconductor nanoparticles, and wherein the first semiconductor nanoparticles and the second semiconductor nanoparticles are in physical contact with each other. The disclosed photochromic heterostructure is especially useful when lower-energy light excites lower-energy-bandgap first nanoparticles to cause higher-energy-bandgap, doped second nanoparticles to photodarken. If the first nanoparticles were not present, the doped second nanoparticles would require higher-energy light to cause darkening. Examples demonstrate embodiments of the invention.

The invention discloses an antibacterial material rich in a bismuth metal organic framework and a preparation method thereof, the method comprises the following steps: adding an indole monomer and an alcohol monomer into a solvent, and then adding nitrosalicylaldehyde into the solvent to obtain a spiropyran compound; the preparation method comprises the following steps: adding humic acid into a binary solvent consisting of dioxane and butanol to obtain a mixed solution; the ratio of the mass of the humic acid to the volume of the binary solvent is (2-3): (20-40) g / ml; sequentially adding a bismuth source, 2-bromo-5-(trifluoromethyl) pyridine and 4-(trifluoromethyl) phenylboronic acid into the mixed solution to obtain a bismuth metal organic framework; and adding the spiropyran compound into the bismuth metal organic framework to obtain the antibacterial material rich in the bismuth metal organic framework. The antibacterial capability of the antibacterial material is improved.

A method for indicating a sanitation status of a surface may comprise contacting a coating on a surface with a cleaning composition, wherein the coating comprises a chromic material and exhibits a baseline optical state under illumination with light having a first wavelength prior to contact with the cleaning composition and an altered optical state under illumination with light having a second wavelength after contact with the cleaning composition, the cleaning composition configured to induce a switch from the baseline optical state to the altered optical state; and illuminating the coating with the first wavelength of light, the second wavelength of light, or both, to reveal a sanitation status of the surface. Systems for indicating a sanitation status of a surface are also provided.

The invention belongs to the technical field of fluorescence detection, and provides a dual-emission carbon dot, a visual hydrogel sensing platform prepared from the dual-emission carbon dot and application of the dual-emission carbon dot in order to solve the problem that field real-time detection cannot be realized in current tetracycline detection. The dual-emission fluorescent carbon dots DE-CDs are synthesized by dissolving toluene diisocynate, fennel and m-phenylenediamine (m-PD) in ultrapure water to serve as precursors, and reacting for 6 hours by controlling the reaction temperature to be 220 DEG C through a one-pot hydrothermal method. Two emission wavelengths (432 nm and 515 nm) are shown under different excitation wavelengths. A fluorescence sensor with double response signals is constructed and used for detecting tetracycline. The sensor shows a very strong index relationship in the range of tetracycline of 0-118 [mu] M, and the detection limit is 53.4 nM. A fluorescent hydrogel detection platform integrated with a smart phone is established, and rapid, portable and on-site detection of tetracycline in a water sample is successfully realized. And an effective strategy is provided for combination of laboratory precision testing and on-site rapid testing.

The invention discloses a conjugated polymer based on alkyl substituted phenyl and a preparation method and application thereof, and belongs to the technical field of high polymer materials. The structural formula of the conjugated polymer provided by the invention is shown as a formula (I): # imgabs0 #, in the formula (I), X1 to X4 are respectively and independently H or R, and at least one of X1 to X4 is R. Alkyl substituted phenyl is used as an intermediate unit, 3, 4-ethylenedioxythiophene is used as an electron donating unit, a benzene ring is introduced, so that a fused ring structure exists in a rigid coplane in a molecule, the charge mobility is enhanced, and alkyl with a specific substitution number and substitution position is combined, so that the charge mobility is improved. According to the conjugated polymer, the electron distribution and the conjugated chain length of the conjugated polymer can be adjusted, the conjugated polymer with good electrochromic properties such as low bandwidth, wide light absorption range, short response time, good optical transmittance and good stability is obtained, and the conjugated polymer has wide application in preparation of electrochromic materials or electrochromic devices.

The present invention discloses a smart label for frozen storage and transportation, and a preparation method and application thereof, which belongs to the field of material synthesis and indication products. The present invention selects two types of organic solvents, namely, suitable alkanes and alcohols, to prepare a compound solvent; then, a color former and a developer are added into the compound solvent to react to obtain a sub-zero color-changing temperature-sensitive material that can be used in a low-temperature environment; finally, the sub-zero color-changing temperature-sensitive material is used as a printing solution, coated on a substrate to form a two-dimensional code, and a smart label is obtained. The preparation method of the sub-zero color-changing temperature-sensitive material of the present invention is simple and the preparation cost is low. The phase change can be used to realize color change within a specific sub-zero temperature range, which can meet the requirements of freezing temperature monitoring. The smart label of the present invention can effectively sense the temperature changes in the transportation and storage environment through the information feedback function of the two-dimensional code and provide a visual signal response to realize real-time temperature monitoring.

The invention relates to the technical field of anti-counterfeiting materials, and particularly discloses a composite color-changing agent, anti-counterfeiting color-changing ink and a preparation method of the anti-counterfeiting color-changing ink. The composite color-changing agent is a composite microsphere with a core-shell-satellite structure, the core is a temperature-sensing color-changing microcapsule and is composed of a temperature-sensing color-changing core material and a polymer wall material, the shell is a transparent polymer shell and wraps the core through in-situ polymerization, the satellite is a light-sensing color-changing material and is embedded and fixed on the shell, and the shell is a transparent polymer shell and is embedded and fixed on the shell. According to the composite color-changing agent, the light-sensitive material and the temperature-sensitive material are compositely inlaid through the polymer shell, so that the problem of poor compatibility of the light-sensitive material and the temperature-sensitive material is solved, the stability and the production efficiency are improved, and the imitation difficulty is increased.

The invention relates to viologen-anthraquinone composite electrochromic liquid and a preparation method thereof, the viologen-anthraquinone composite electrochromic liquid comprises 1.2-2.5 parts by mole of viologen salt, 0.8-1.5 parts by mole of anthraquinone derivative and 8-12 parts by mole of electrolyte; the viologen salt is ethyl viologen tetrafluoroborate or heptyl viologen tetrafluoroborate or octyl viologen tetrafluoroborate; the anthraquinone derivative is 1-ethylamino-4-hydroxy anthraquinone or acid blue 43; the preparation method comprises the following steps: preparing an electrolyte solution; adding purple refined salt and anthraquinone derivatives according to the formula; fully dissolving the electrochromic material to form uniform and transparent initial liquid; and degassing the initial liquid to remove oxygen dissolved in the initial liquid. The electrochromic liquid has the advantages that after the purple refined salt and the anthraquinone derivative are added into the dissolving solution according to the proportion of the formula, the two color-changing materials are jointly dissolved in the electrolyte, and when the two color-changing materials are reduced at the same time, spectrum superposition absorbed by the two color-changing materials can cover the whole visible region, so that black and white switching of the electrochromic liquid is realized, and the use effect is good.

The invention discloses a preparation method and application of stimuli-responsive wide-gamut color-changing phosphorescent carbon dots, and the preparation method comprises the following steps: S1, at 180-250 DEG C, taking levofloxacin and acid as reaction raw materials, and carrying out hydrothermal reaction in an aqueous solution for 1-8 hours; s2, cooling a reaction product obtained by the hydrothermal reaction, and performing centrifugal separation to obtain a reactant solution; and S3, drying the obtained reactant solution to obtain the stimuli-responsive wide-color-gamut color-changing phosphorescent carbon dots. The preparation method of the stimuli-responsive wide-gamut color-changing phosphorescent carbon dots is simple, the raw materials are wide in source and easy to obtain, the reaction conditions are mild, the yield is high, and the carbon dots are green, pollution-free, low in toxicity and suitable for batch production; the stimuli-responsive wide-color-gamut color-changing phosphorescent carbon dot material fills the blank of wide-color-gamut color-changing phosphorescent carbon dot materials, solves the problem that stimuli-responsive wide-color-gamut color-changing phosphorescent carbon dots are difficult to prepare, and can be used for phosphorescent color display, advanced information encryption and food freshness monitoring.

The invention discloses a rare earth metal polymer with multiple stimulation responsiveness and a preparation method thereof, two monomers SP and VTPY are mixed with methyl methacrylate (MMA) according to a certain proportion, a polymer skeleton Poly (VTPY-co-SP-co-MMA) is prepared through a free radical polymerization reaction, the polymer and Tb (Com) 3.2 H2O are further subjected to a coordination reaction according to a specific proportion, and the rare earth metal polymer with multiple stimulation responsiveness is obtained. The Poly-Tb (Coum) 3 with the stimuli-responsive discoloration characteristic is prepared by the aid of the method. The rare earth metal polymer with methyl methacrylate as a framework and rare earth terbium ions and spiropyran monomers as double emission centers is synthesized, has multiple stimulation response characteristics, provides a brand new strategy and possibility for development of rare earth-based multifunctional intelligent materials, and has wide application prospects. An innovative solution is provided for development of a thermal enhanced rare earth luminescent material, the thermosensitive fluorescence response performance of the material is greatly improved, and a new thought is provided for design of an intelligent temperature response type rare earth luminescent material.

The invention discloses a mechanical force-induced fluorescence discoloration sensor material as well as a preparation method and application thereof, and relates to the technical field of organic synthesis and fine chemical engineering. The preparation method comprises the following steps: step 1, carrying out heating reaction on 4-(1, 2, 2-triphenyl vinyl) benzaldehyde, 3-(2, 2-dicyano-1-(3, 4-diaminophenyl) vinyl) benzene-1-yl and a catalyst to prepare a compound 1-1; and 2, carrying out heating reaction on the obtained compound 1-1 and methyl iodide under the action of alkali and a solvent, and analyzing and purifying to obtain a compound 1-2. The compound disclosed by the invention is low in preparation cost, simple and convenient to operate and simple in method, the compound shows the material characteristic of mechanical force-induced fluorescence discoloration and can be applied to the fields of sensors, dyes, anti-counterfeiting and the like, and meanwhile, the synthesis method can be used for synthesis in the fields of fine organic chemical engineering such as luminescent materials, printing and dyeing technologies and the like.

The invention discloses a method for coating a polar organic compound into a silicon dioxide microcapsule, and the method for coating the polar organic compound into the silicon dioxide microcapsule comprises the following steps: (1) carrying out condensation reaction on an alkoxy silane monomer to form polyalkyl siloxane as a precursor of the silicon dioxide microcapsule; (2) replacing a part of alkoxy groups in the polyalkyl siloxane with a hydrophilic compound containing hydroxyl groups to obtain amphiphilic modified polyalkoxy siloxane as a precursor of another silicon dioxide microcapsule; (3) mixing the polyalkoxy siloxane obtained in the step (1), the hydrophilic group modified polyalkoxy siloxane obtained in the step (2) and a polar organic compound according to a ratio, and heating to enable the mixture to be in a liquid state if necessary; (4) emulsifying the mixture obtained in the step (3) in water to form an oil-in-water emulsion; and (5) carrying out condensation reaction on the precursors of the two silicon dioxide microcapsules in the mixture to form the silicon dioxide microcapsules.

The invention is applicable to the technical field of eutectic materials, and provides an organic macrocyclic aromatic hydrocarbon-based eutectic material and a preparation method and application thereof, the eutectic material is a metastable material EtLP6-F4TCNQ alpha, and is prepared by taking oblique tower aromatic hydrocarbon as a subject and electron-deficient 2, 3, 5, 6-tetrafluoro-7, 7, 8, 8-tetracyanodimethyl p-benzoquinone as an object, and carrying out co-crystallization on the oblique tower aromatic hydrocarbon and the 2, 3, 5, 6-tetrafluoro-7, 7, 8, 8-tetracyanodimethyl p-benzoquinone to obtain the organic macrocyclic aromatic hydrocarbon-based eutectic material. And carrying out mechanical grinding on 2, 3, 4, 5, 6, 8-tetracyanodimethyl p-benzoquinone. According to the method, two or more organic molecules are directly mixed and induced to form the eutectic structure through simple mechanical grinding operation, the method is efficient, low in cost and easy for large-scale production, the eutectic material with the metastable structure is prepared, and the metastable structure shows higher sensitivity and faster response speed in gasochromic detection.

The electro-optic assembly includes a first substrate and a second substrate disposed in a substantially parallel, spaced apart relationship to the first substrate. A first conductive layer is disposed on the first substrate and a second conductive layer is disposed on the second substrate. A cathodic electro-optic film is in contact with the second conductive layer and includes a cathodic species. An anodic electro-optic film is in contact with the first conductive layer. The anodic electro-optic film includes a plurality of anodic species mixed in a molar ratio configured to generally maintain the a* and b* values ​​of the electro-optic assembly, both of which remain between a high end transmissive state and a fully darkened state caused by an applied voltage range of -8 to 8. An electrolyte medium is disposed between the cathodic electro-optic film and the anodic electro-optic film.

The present disclosure is directed, in general, to (1) nonlinear optical (NLO) chromophores containing spirofluorene-isophorone bridging groups, including (2) compositions / materials / resistive layers comprising NLO chromophores containing spirofluorene-isophorone bridging groups, and the methods of making the compositions / materials / resistive layers comprising NLO chromophores containing spirofluorene-isophorone bridging groups (e.g., methods of poling and / or drying, and the like), (3) uses of NLO chromophores containing spirofluorene-isophorone bridging groups in electro-optic devices (e.g., EOMs).

The invention discloses an electrochromic medium composition and application thereof.The electrochromic medium composition comprises at least one anode electrochromic material and at least one cathode electrochromic material, and the cathode electrochromic material comprises viologen derivatives. The viologen derivative is fluorenyl viologen prepared by introducing fluorene into a viologen structure, the compound can show different coloring states under different voltages, the compound is matched with a ferrocene derivative, a red and blue mixed coloring state can be realized, and the color of the viologen derivative is improved. Or the compound, dimethyl dihydrophenazine and a ferrocene derivative are matched, so that a neutral gray coloring state can be realized, and the application value of the compound in the field of electrochromism is greatly expanded.

The present invention belongs to the technical field of mechanochromic materials, and specifically relates to a mechanochromic material containing rhodamine with a hydantoin structure, and its preparation method and application. The rhodamine mechanochromic material containing a hydantoin structure is shown in structure (I), with rhodamine B as the matrix, reduced to rhodamine alcohol, oxidized to generate rhodamine aldehyde, and reacted with hydantoin to prepare a six-membered spirocyclic rhodamine containing a hydantoin structure. The rhodamine compound containing a hydantoin structure involved in the present invention has good ion interference resistance, exhibits photochromic properties in a dichloromethane solvent, and has the properties of mechanical stress discoloration and solvent mixing stress discoloration with high contrast and good repeatability. The solid powder of the rhodamine mechanochromic material containing a hydantoin structure has the characteristic of changing color upon grinding. After the action of mechanical force, the color of the powder changes from yellow to pink, and a reversible color change is achieved during the grinding-heating process.

The invention relates to the technical field of ceramic back plates, in particular to an integrated photochromic casting ceramic back plate material and a preparation method thereof. The chemical formula of the ceramic backboard material is BaMgSiO4EuxFey, wherein 0 lt; x is less than or equal to 0.01, 0lt; and y < = 0.01. The rare earth element Eu and the transition metal element Fe are cooperatively doped, so that the color change contrast ratio and the hardness of the ceramic are remarkably improved; x and y meet the following requirements: 0.002 lt; x is less than or equal to 0.008, 0.002 lt; y is less than or equal to 0.008, so that the color-changing contrast ratio and the hardness of the ceramic back plate material can be further improved, the color-changing contrast ratio is more than 90%, and the Vickers hardness is more than 600Hv; the response time of the ceramic backboard material is prolonged to be less than 8 s, the color change fatigue resistance is high, the chemical stability is good, and the structure supporting and photochromic functions are achieved.

The invention belongs to the technical field of electrochromic materials, and provides a red-transparent display electrochromic polymer and a preparation method thereof. The method disclosed by the invention comprises the following steps: carrying out ring formation reaction on N-(2, 5-dibromophenyl)-2-ethylhexyl thioamide, potassium ferricyanide and sodium hydroxide to obtain 4, 7-dibromo-2-(heptane-3-yl) benzothiazole; the preparation method comprises the following steps: carrying out substitution reaction on EDOT, n-butyllithium and tributyltin chloride to obtain EDOT-Sn; the preparation method comprises the following steps: carrying out Stille coupling reaction on 2, 4, 7-dibromo-2-(heptane-3-yl) benzothiazole and EDOT-Sn, and then carrying out electrochemical polymerization reaction to obtain the electrochromic polymer. A pure donor (D) type organic molecule is obtained by the method, a corresponding electrochromic film is prepared by electrochemical polymerization, reversible switching between red and transparency is realized, and the electrochromic film has good cycle stability and high color change response speed.

The invention discloses an MXene composite nanocellulose liquid crystal intelligent color-changing material as well as a preparation method and application thereof. The main components of the intelligent color-changing material comprise nanocellulose liquid crystal with a self-assembly structure and an MXene two-dimensional nanosheet. By compounding the MXene two-dimensional nanosheet with the nanocellulose liquid crystal phase, the MXene two-dimensional nanosheet can be used as a broadband absorbent and a black substrate to remarkably improve the color saturation of the nanocellulose liquid crystal; meanwhile, due to the two-dimensional nanosheet morphology, high photo-thermal conversion efficiency and high conductivity of MXene, the MXene composite nanocellulose liquid crystal intelligent color-changing material is flexible and adjustable in initial color, color-changing response speed, color-changing response sensitivity and color changing range. Based on the excellent characteristics of the nanocellulose liquid crystal and the MXene two-dimensional nanosheet, the MXene composite nanocellulose liquid crystal intelligent color-changing material has color change response to various stimulation factors such as environment temperature change, electric field change, magnetic field change, illumination and external applied stress.