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Photosensitive response hydrogel and application thereof in preparation of photochromic soft material

A hydrogel and photosensitive technology, which is applied in the field of preparation of photosensitive responsive hydrogel photochromic materials, can solve the problems of high energy consumption in the preparation process, complicated and difficult to control the preparation process, and serious environmental pollution, and achieve a simple and easy preparation process Easy to use, easy to obtain raw material sources, and simple raw material sources

Inactive Publication Date: 2022-03-11
LUOYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, with the production and application of organic photochromic materials, problems and deficiencies such as complex and difficult to control the preparation process, serious environmental pollution, low thermodynamic stability, poor fatigue resistance and sensitivity have become more and more obvious and serious. It restricts the research and application of photochromic materials
[0006] Inorganic photochromic materials have greatly expanded the application range of photochromic materials due to their advantages such as fast discoloration rate, long duration of discoloration, high thermal stability, good fatigue resistance, high mechanical strength, macroscopic controllability and easy molding. It provides a new material basis for potential applications in the fields of architectural decoration, information storage, smart switches, and national defense technology. However, due to the late development of inorganic photochromic materials, there are fewer types, expensive raw materials, and high energy consumption in the preparation process. , greatly restricting its application and development

Method used

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  • Photosensitive response hydrogel and application thereof in preparation of photochromic soft material
  • Photosensitive response hydrogel and application thereof in preparation of photochromic soft material
  • Photosensitive response hydrogel and application thereof in preparation of photochromic soft material

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preparation example Construction

[0032] The preparation method of the photosensitive response hydrogel photochromic material based on aluminum ion sensitization comprises the following steps:

[0033] Step 1. Weigh the dipyridyl disulfide according to a certain mass ratio, put it into a 50 mL glass reactor, add 15-20 mL of ethanol / water mixed solvent with a volume ratio of 3:1, and stir to dissolve it completely. Obtain a mixed system of dipyridyl disulfide, alcohol and water;

[0034] Step 2. Place the mixing system in step 1 on a heating magnetic stirrer with a setting temperature of 70-80° C., heat and stir the mixing system to raise the temperature to the setting temperature;

[0035] Step 3, weighing the soluble aluminum salt according to a certain mass ratio, adding it to the warming system in Step 2, and stirring to make it completely dissolve;

[0036] Step 4. Under heating and stirring, add the concentration dropwise at a concentration of 0.5 mol Lˉ 1 (or content is the lye of 20-25% ammonia solut...

Embodiment 1

[0047] The preparation method of the photosensitive response hydrogel photochromic material based on aluminum ion sensitization comprises the following steps:

[0048]Step 1. According to a certain mass ratio, weigh 2.20 g of 2,2'-dipyridyl disulfide, put it into a 50 mL glass reactor, add 15 mL of ethanol / water mixed solvent with a volume ratio of 3:1, and stir Dissolve it completely to obtain a mixed system of 2,2'-dipyridyl disulfide, alcohol and water;

[0049] Step 2. Place the mixing system in step 1 on a heating magnetic stirrer with a set temperature of 70°C, heat and stir the mixed system to raise the temperature to the set temperature;

[0050] Step 3, according to a certain mass ratio, weigh 1.33g of aluminum chloride, add the warming system of step 2, and stir to make it dissolve completely;

[0051] Step 4. Under heating and stirring, add drop by drop the concentration of 0.5 mol L ˉ1 Sodium hydroxide solution to make it pH = 5;

[0052] Step 5, continue heati...

Embodiment 2

[0056] The preparation method of the photosensitive response hydrogel photochromic material based on aluminum ion sensitization comprises the following steps:

[0057] Step 1. According to a certain mass ratio, weigh 2.28g of 2,2'-dipyridyl disulfide, put it into a 50 mL glass reactor, add 20 mL of ethanol / water mixed solvent with a volume ratio of 3:1, and stir Dissolve it completely to obtain a mixed system of 2,2'-dipyridyl disulfide, alcohol and water;

[0058] Step 2. Put the mixing system in step 1 on a heating magnetic stirrer with a temperature of 75°C, and heat the mixing system to the set temperature under heating and stirring;

[0059] Step 3, according to a certain mass ratio, weigh 3.42g of aluminum sulfate, add the warming system of step 2, and stir to make it dissolve completely;

[0060] Step 4. Under heating and stirring, add drop by drop the concentration of 0.5 mol L ˉ1 Potassium hydroxide solution, make it pH=6;

[0061] Step 5. Continue heating and stir...

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Abstract

The invention relates to photosensitive response hydrogel and application thereof in preparation of a photochromic soft material.The photosensitive response hydrogel belongs to the technical field of novel photochromic soft materials.The preparation method comprises the steps that bipyridyl disulfide and an ethanol / water mixed solvent are mixed and then magnetically stirred at the temperature of 70-80 DEG C, and a warm system is obtained; adding soluble aluminum salt into the warm system, and stirring until the soluble aluminum salt is dissolved; dropwise adding alkali liquor until the pH value is 5-7; continuously heating and stirring to fully react, and then dropwise adding alkali liquor until the pH value is 7-8; when the system is colloidal, stopping heating and stirring, and cooling to room temperature to obtain the hydrogel photochromic material. According to the invention, the sensitization of aluminum ions and hydrogel are ingeniously combined, a novel high-photosensitive response hydrogel photochromic material is synthesized for the first time, and a new breakthrough of synthesizing the hydrogel photochromic material under conventional conditions is realized; and a new thought and a new method are provided for design and synthesis of hydrogel photochromic materials and research of novel photochromic materials.

Description

technical field [0001] The invention belongs to the technical field of novel photochromic soft materials, and in particular relates to a preparation method of a photosensitive responsive hydrogel photochromic material based on aluminum ion sensitization. Background technique [0002] Photochromism refers to the reversible process of changing the molecular structure and color (light absorption peak) of a substance under the excitation of light of different wavelengths and intensities. Materials that can undergo reversible color changes under light excitation are called photochromic materials. [0003] Photochromic materials are widely used in architectural decoration, anti-counterfeiting marks, biomedicine, molecular switches, molecular catalysis, information storage, national defense technology, etc. The wide range of applications in the field has aroused great interest of scientific researchers. [0004] Photochromic materials are divided into organic photochromic materia...

Claims

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Application Information

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IPC IPC(8): C09K9/00B01J13/00
CPCC09K9/00B01J13/0065B01J13/0056C09K2211/1029
Inventor 茹慧芳李俊霞
Owner LUOYANG NORMAL UNIV
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