Electrochromic material and electrochromic device

Abstract

Provided are an electrochromic material and an electrochromic device. The electrochromic material comprises a cathode electrochromic material, an anodic electrochromic material, and a mixture of electrolyte and acrylic acid ion salt polyelectrolyte. The anodic electrochromic material is 10-methylphenothiazine. The electrolyte is ethylene carbonate or gamma-butyrolactone. The electrochromic device comprises transparent glass, and reflective glass. All around of the transparent glass and the reflective glass are adhered by an adhesive to form a cavity, which is filled with the electrochromic material. The present invention has the advantages that: the electrochromic material adds charged acrylic acid ion salt polyelectrolyte into a non-uniform electric field, so that the chromism speed of the electrochromic material is fast; and the electrochromic device prepared by the photochromic material is very low in cathode electrochromic material and anode electrochromic material migration rate after a long time chromism.

Description

technical field

[0001] The invention relates to an electrochromic material, specifically an electrochromic material applied to an automatically darkening anti-glare rearview mirror and related dimming glass and an electrochromic device prepared by using the electrochromic material. Background technique

[0002] Electrochromism refers to the phenomenon that the optical properties of materials (mainly reflectivity, transmittance, absorption rate, etc.) undergo reversible color changes under the action of an external electric field, and appear as reversible changes in color and transparency in appearance. The automatic anti-glare rearview mirror made of electrochromic materials can adjust the intensity of reflected light according to the intensity of external light through the electronic induction system to achieve anti-glare effect and make driving safer. Although electrochromic devices are widely used in the field of automobile rearview mirrors and high-end architectural glas...

Examples

preparation example Construction

[0042]The preparation method of the acrylic acid ionic salt polyelectrolyte comprises the following steps: the step of synthesizing the acrylic acid monomer of the ionic salt; the acrylic acid monomer of the synthesized ionic salt is copolymerized with the acrylic monomer and the olefin monomer to prepare an ionic polymer electrolyte A step of. The specific steps of the acrylic acid monomer for the synthesis of ionic salts are as follows: dissolve 0.01-0.012 mol of quaternary ammonium salt or quaternary phosphonium salt in 10-100 ml of absolute ethanol, add 0.01-0.012 mol of acrylic acid monomer compound, Then add 0.01-0.012 mol of potassium hydroxide or sodium hydroxide solid particles, at room temperature until the reaction is complete, distill the resulting filtrate at 30-50°C to remove the absolute ethanol solvent, and then place it at -10-0 Cool and crystallize at ℃ for 1 to 10 hours, filter the cooled mixture under reduced pressure to obtain acrylic acid ion salt monomer...

Embodiment 1

[0050] Example 1, take 0.01mol of tetraethylammonium bromide and dissolve in 20ml of absolute ethanol, add 0.01mol of acrylic acid, then add 0.01mol of sodium hydroxide solid particles, react at room temperature for 24 hours and then filter. The resulting filtrate was distilled off under reduced pressure at 45°C to remove the absolute ethanol solvent, and placed at -10°C for cooling and crystallization for 2 hours. The cooled mixture was filtered under reduced pressure to obtain tetraethylammonium acrylate solid particles. Dissolve 1mol of methyl methacrylate, 0.02mol of tetraethylammonium acrylate and 0.5mol of styrene in 1000ml of toluene solvent, add 0.001mol of azobisisobutyronitrile as the initiator of free radical polymerization, and stir the reaction at 80°C 12 hours. The obtained mixture is added dropwise into petroleum ether to precipitate the acrylic acid ionic salt polyelectrolyte to obtain the desired new acrylic acid ionic salt polyelectrolyte. The chemical stru...

Embodiment 2

[0053] Example 2, 0.01 mol of tetrabutylphosphonium bromide was dissolved in 10 ml of anhydrous methanol, 0.01 mol of methacrylic acid was added, and then 0.01 mol of potassium hydroxide solid particles were added, reacted at room temperature for 24 hours and then filtered. The resulting filtrate was distilled off under reduced pressure at 35°C to remove the anhydrous methyl ethanol solvent, and placed at -5°C for cooling and crystallization for 8 hours. The cooled mixture was filtered under reduced pressure to obtain solid particles of tetrabutylphosphonium methacrylate. 0.5mol butyl methacrylate, 0.05mol tetrabutylphosphonium methacrylate and 1mol methyl methacrylate were dissolved in 500ml ethylene carbonate solvent, and 0.002mol of azobisisobutyronitrile was added as the initiator of free radical polymerization. The reaction was stirred at 60°C for 12 hours. The obtained mixture is added dropwise into petroleum ether to precipitate the acrylic acid ionic salt polyelectrol...

technical field

[0001] The invention relates to an electrochromic material, specifically an electrochromic material applied to an automatically darkening anti-glare rearview mirror and related dimming glass and an electrochromic device prepared by using the electrochromic material. Background technique

[0002] Electrochromism refers to the phenomenon that the optical properties of materials (mainly reflectivity, transmittance, absorption rate, etc.) undergo reversible color changes under the action of an external electric field, and appear as reversible changes in color and transparency in appearance. The automatic anti-glare rearview mirror made of electrochromic materials can adjust the intensity of reflected light according to the intensity of external light through the electronic induction system to achieve anti-glare effect and make driving safer. Although electrochromic devices are widely used in the field of automobile rearview mirrors and high-end architectural glas...

Examples

preparation example Construction

[0042]The preparation method of the acrylic acid ionic salt polyelectrolyte comprises the following steps: the step of synthesizing the acrylic acid monomer of the ionic salt; the acrylic acid monomer of the synthesized ionic salt is copolymerized with the acrylic monomer and the olefin monomer to prepare an ionic polymer electrolyte A step of. The specific steps of the acrylic acid monomer for the synthesis of ionic salts are as follows: dissolve 0.01-0.012 mol of quaternary ammonium salt or quaternary phosphonium salt in 10-100 ml of absolute ethanol, add 0.01-0.012 mol of acrylic acid monomer compound, Then add 0.01-0.012 mol of potassium hydroxide or sodium hydroxide solid particles, at room temperature until the reaction is complete, distill the resulting filtrate at 30-50°C to remove the absolute ethanol solvent, and then place it at -10-0 Cool and crystallize at ℃ for 1 to 10 hours, filter the cooled mixture under reduced pressure to obtain acrylic acid ion salt monomer...

Embodiment 1

[0050] Example 1, take 0.01mol of tetraethylammonium bromide and dissolve in 20ml of absolute ethanol, add 0.01mol of acrylic acid, then add 0.01mol of sodium hydroxide solid particles, react at room temperature for 24 hours and then filter. The resulting filtrate was distilled off under reduced pressure at 45°C to remove the absolute ethanol solvent, and placed at -10°C for cooling and crystallization for 2 hours. The cooled mixture was filtered under reduced pressure to obtain tetraethylammonium acrylate solid particles. Dissolve 1mol of methyl methacrylate, 0.02mol of tetraethylammonium acrylate and 0.5mol of styrene in 1000ml of toluene solvent, add 0.001mol of azobisisobutyronitrile as the initiator of free radical polymerization, and stir the reaction at 80°C 12 hours. The obtained mixture is added dropwise into petroleum ether to precipitate the acrylic acid ionic salt polyelectrolyte to obtain the desired new acrylic acid ionic salt polyelectrolyte. The chemical stru...

Embodiment 2

[0053] Example 2, 0.01 mol of tetrabutylphosphonium bromide was dissolved in 10 ml of anhydrous methanol, 0.01 mol of methacrylic acid was added, and then 0.01 mol of potassium hydroxide solid particles were added, reacted at room temperature for 24 hours and then filtered. The resulting filtrate was distilled off under reduced pressure at 35°C to remove the anhydrous methyl ethanol solvent, and placed at -5°C for cooling and crystallization for 8 hours. The cooled mixture was filtered under reduced pressure to obtain solid particles of tetrabutylphosphonium methacrylate. 0.5mol butyl methacrylate, 0.05mol tetrabutylphosphonium methacrylate and 1mol methyl methacrylate were dissolved in 500ml ethylene carbonate solvent, and 0.002mol of azobisisobutyronitrile was added as the initiator of free radical polymerization. The reaction was stirred at 60°C for 12 hours. The obtained mixture is added dropwise into petroleum ether to precipitate the acrylic acid ionic salt polyelectrol...

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