A polymer hydrogel with photoresponsive properties to ultraviolet light

A polymer hydrogel and polymer technology, applied in the field of polymer hydrogel, can solve the problems of polymer substances not responding obviously to ultraviolet radiation, and achieve the effects of real-time color development with obvious characteristics, easy observation, and easy packaging

Inactive Publication Date: 2016-07-06
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a polymer hydrogel with corresponding characteristics to ultraviolet light, and to provide a preparation method for the polymer hydrogel to overcome the problems in the prior art. The existing polymer substances do not respond obviously to ultraviolet light and the problems that ultraviolet radiation cannot be avoided

Method used

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  • A polymer hydrogel with photoresponsive properties to ultraviolet light
  • A polymer hydrogel with photoresponsive properties to ultraviolet light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Synthesize the aqueous dispersion of nano polymer particles containing spiropyran by miniemulsion polymerization process, the steps are as follows:

[0044] 1) Prepare an aqueous phase solution: add 20 mmol sodium lauryl sulfate and 10 mmol pH buffer sodium bicarbonate into 1 L of water and mix to prepare an aqueous phase solution;

[0045] 2) Preparation of oil phase solution: 0.1 part of N-hydroxyethyl spiropyranyl methacrylate, 2 parts of methyl methacrylate, 0.1 part of crosslinking agent 1,4-butanediol diacrylate and 0.05 part Co-stabilizer polystyrene mixed evenly;

[0046] 3) Mixing and refining: mix the oil phase and the water phase at a mass ratio of 1:1 at 30-35°C; mechanically stir and emulsify to form a macroemulsion, and then ultrasonically homogeneously emulsify at a temperature of 30-35°C to form a fine emulsion;

[0047] 4) Polymerization reaction: 0.021 parts of 20 wt % potassium persulfate aqueous solution was added under stirring condition at 50-70° ...

Embodiment 2

[0051] Only change the polymer solution of Example 1 into 1 wt % sodium polyacrylate aqueous solution, and the rest are identical to Example 1.

[0052] Hang the prepared ultraviolet light indicator marker on the place where the ultraviolet disinfection lamp is exposed, and the color changes from colorless or very light red to deep purple after a few minutes. The color returns to its original light state after hours of exposure to white light.

Embodiment 3

[0054] Only change thickness 0.1mm polyester bag into thickness 0.1mm medical PVC plastic bag in embodiment 1, all the other are identical with embodiment 1.

[0055] Hang the prepared ultraviolet light indicator marker on the place where the ultraviolet disinfection lamp is exposed, and the color changes from colorless or very light red to deep purple after a few minutes. The color returns to its original light state after hours of exposure to white light.

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Abstract

The invention discloses a polymer hydrogel. The polymer hydrogel is formed by mixing a spiropyran-containing nanometer polymer particle aqueous dispersion and a 1-10 wt % polymer aqueous solution. The spiropyran-containing The aqueous dispersion of nanometer polymer particles is synthesized by miniemulsion polymerization. The present invention designs and synthesizes a polymer hydrogel with UV photoresponse characteristics; the synthesized polymer material will show the characteristics of ultraviolet photochromic effect because it contains methacrylic acid spiropyran functional group, and it has the characteristics of easy The advantages of preparation, real-time color development and product safety are of creative value.

Description

technical field [0001] The invention relates to a polymer hydrogel, in particular to a polymer hydrogel with corresponding properties to ultraviolet light. Background technique [0002] Ultraviolet light Electromagnetic radiation with shorter wavelengths than visible light but longer than X-rays. Ultraviolet light has a wavelength range of 10-400nm in the electromagnetic spectrum. This range begins at the short-wavelength limit of visible light and overlaps with the wavelengths of long-wavelength X-rays. Ultraviolet light is divided into A rays, B rays and C rays (referred to as UVA, UVB and UVC), and the wavelength ranges are 400-315nm, 315-280nm, 280-190nm respectively. Sterilization is the most common use function of ultraviolet light. Because ultraviolet rays have strong lethality to organisms, it can be used to deal with bacteria and viruses. However, special attention should be paid to the fact that these sterilization equipment can also harm the human body, so spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/12C08L29/04C08L33/02C08L33/26C08L39/04C08F220/14C08F220/36C08F2/26
Inventor 张青张诣卓张沛怡李锦锦罗正鸿
Owner SHANGHAI JIAO TONG UNIV
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