31results about How to "Reversible color change" patented technology

The invention relates to a method for preparing a reversible discolouring membrane made from polyaniline composite nanofiber, which is characterized by comprising the following steps: dissolving an eigenstate polyaniline raw material in a stirred tank at room temperature to obtain polyaniline solution with a mass fraction of 0.2-15%; adding blending polymer to polyaniline solution at room temperature, evenly blending the mixture to obtain solution with the mass fraction of the blending polymer being 0.5-30%; inputting the solution to a spinning nozzle of an electrostatic spinning device at a flow velocity of 0.1-4mL / h at room temperature and a relative humidity of 20-60% for carrying out electrostatic spinning to prepare the nanometer composite fibre; and drying the nanofiber membrane obtained from a receiving device for 1-12h at 25-80 DEG C to obtain the reversible discolouring membrane made from polyaniline composite nanofiber. The invention features simple preparation process, low cost and good mechanical property, high flexibility, good corrosion resistance and uniform colour of the polyaniline composite nanofiber.

The invention provides an electrochromic film, its preparation method and application, and an electrochromic device. The electrochromic film includes an electrochromic layer, and the raw materials of the electrochromic layer include the following components in parts by weight 30-50 parts by weight of polymethyl methacrylate; 18-22 parts by weight of acid response dye; 20-30 parts by weight of plasticizer; 10-20 parts by weight of electrolyte; wherein, the acid response dye is electroacid and A combination of acid responsive materials. The electrochromic thin film provided by the invention can undergo stable and reversible color changes under the action of an external electric field, and has electrochromic properties.

The invention provides triarylated amine polyschiff base, a preparation method thereof taking triphenylamine as a raw material and an application, which relates to a preparation method of a polyschiff base and an application. The invention can solve the problems that solubility of the exiting polyschiff base in an organic solvent is low, expensive raw materials and rigorous and complex synthesis route are needed by light-emitting display polymers, and color change is not easy to regulate and control in the prior art. The method comprises the following steps: adding the organic solvent of a dialdehyde base compound into 4'-bisamino-4''-N-carbazolyl triphenylamine by three times, controlling the temperature to be 160 DEG C, reacting for 10-14 hours under the condition of nitrogen protection, depositing the polymer, extracting, drying, and obtaining the triarylated amine polyschiff base. The polyschiff base of the invention has the advantage of heat resistance and can be dissolved in theorganic solvent. Under the action of acidity or voltage, the color of the polyschiff base is changed reversibly.

The invention discloses a polyaniline derivative, a preparation method of reduced polySchiff base thereof and an application of the polyaniline derivative, which relate to a polyaniline material and a preparation method and an application thereof and are used for solving the technical problem of low dissolubility in an organic solvent and difficulty in processing into a film existing in the conventional polyaniline. The structural formula of the polyaniline derivative disclosed by the invention is shown in the specifications. The preparation method comprises the following steps of: adding conjugate polySchiff base, a solvent and sodium borohydride into a three-neck flask; raising the temperature to 10-70 DEG C, stirring and refluxing for 10-72 hours; cooling and pouring into methanol; and filtering and drying to obtain the polyaniline derivative. The polyaniline derivative is applied as a photoelectric material, and comprises an electrochromic material, a fluorescent sensing material, an acid-based sensing material, a hole transport material, a three-order nonlinear material, an anti-counterfeiting material, a camouflage material, an automobile rearview mirror material or a display material.

The invention provides an alkali-responsive electrochromic film and its preparation method and application. The alkali-responsive electrochromic film includes an electrochromic layer, and the electrochromic layer includes the following components in parts by weight: 25-60 parts by weight of polymethyl methacrylate; 15-25 parts by weight of alkali response dye; 15-30 parts by weight of plasticizer; 10-25 parts by weight of electrolyte; Composition of responsive materials. The alkali-responsive electrochromic thin film provided by the invention has the characteristic of electrochromism, the electrochromic response time is short, 0.01-10s, and the color stability time is long.

The invention relates to a polyaniline derivative, a preparation method of reductive poly Schiff base of the polyaniline derivative and application of the polyaniline derivative, in particular relates to a polyaniline material as well as a preparation method and application thereof, and is mainly used for solving the technical problems that the existing polyaniline has poor dissolubility in an organic solvent and is difficultly processed into a film. The structure formula of the polyaniline derivative is shown in the specification. The preparation method of the polyaniline derivative comprises the following steps: adding conjugated poly Schiff base, a solvent and sodium borohydride in a three-neck flask, heating to 10-70 DEG C, and stirring and refluxing for 10-72 hours; cooling, pouring a product obtained from the former step into methanol; and filtering and drying to obtain the polyaniline derivative. The polyaniline derivative can be used as photoelectric materials including an electrochromic material, a fluorescent sense material, an acidic sense material, a cavity transmission material, a three-order non-linear material, an anti-counterfeiting material, a camouflage material and an automobile rearview mirror material, and can also be used for proton detection.

The invention discloses a TiO 2 Nanoparticle-adsorbed peryleneimide derivative films and their application as electrochromic materials, the TiO 2 Nanoparticle Adsorbed Peryleneimide Derivative Films Composed of N,N’-Bis(2-Phosphoethyl)-3,4,9,10-Perylenetetracarboxylic Diimide (PPDI) and TiO 2 Nanoparticles are obtained by chemisorption. Compared with other existing electrochromic materials, the electrochromic material prepared by the invention has the advantages of reversible color change, high color contrast, faster response time and the like. It can display the color change from red to purple, the optical contrast can reach 30.05%, and the coloring time is 1.62s, which is a potential electrochromic material.

The invention provides a composition for forming polymer-dispersed liquid crystals, a polymer-dispersed liquid crystal coating and a self-illuminating dimming film. The composition includes adhesive, inorganic electroluminescent material, liquid crystal material and photoinitiator. The polymer-dispersed liquid crystal coating formed by the above composition can undergo stable and reversible color changes, and is manifested as reversible changes in light of different colors and transparency in appearance, so that the polymer-dispersed liquid crystal coating formed by the composition realizes a real sense of color change. Compared with dyes, inorganic electroluminescent materials have little effect on the curing speed and degree of curing of the binder polymer, and at the same time, under the irradiation of ultraviolet light, the liquid crystal microparticles formed by separating from the mixture of the binder polymer and liquid crystal The drop separation formability is good, and liquid crystal microdroplets with larger apertures can be formed, so that the polymer dispersed liquid crystal coating formed by the composition has the advantages of low driving voltage and high open-state transmittance.

The invention relates to electrochromatic materials and preparation methods thereof, particularly relates to an electrochromatic material made of isocyanate-triphenylamine and a method for preparing the electrochromatic material, and aims to solve the problem that films made of existing electrochromatic materials are prone to shed during test and poor in resistance to solvent corrosion. The structural formula of the electrochromatic material made of isocyanate-triphenylamine is shown as follows. The method includes: adding diisocyanate- triphenylamine or triisocyanate- triphenylamine into anhydrous dichloroethane, stirring under the shielding of nitrogen to enable the diisocyanate- triphenylamine or triisocyanate- triphenylamine to be completely dissolved and well mixed, heating the obtained mixture, adding dihydroxyl monomer, performing condensation backflow reaction at the temperature after heating, then cooling to the room temperature, and finally drying the solid reaction product obtained after filtering separation to constant weight to obtain the electrochromatic material. The method is mainly used for electrochromatic materials made of isocyanate-triphenylamine.