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Macromolecule hydrogel with photoresponse characteristic to ultraviolet light

A polymer hydrogel and polymer technology, which is applied in the field of polymer hydrogel, can solve the problem that the polymer substance does not respond obviously to ultraviolet radiation, and achieve the effects of real-time color development with obvious characteristics, easy packaging and easy observation.

Inactive Publication Date: 2014-09-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Macromolecule hydrogel with photoresponse characteristic to ultraviolet light
  • Macromolecule hydrogel with photoresponse characteristic to ultraviolet light

Examples

Experimental program
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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 the aqueous phase solution: add 20mmol sodium lauryl sulfate and 10mmol pH buffer sodium bicarbonate into 1L of water and mix to prepare the 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 refinement: 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 macromolecule hydrogel, which is mixed by nano polymer particle aqueous dispersion with spiropyrane and 1-10wt% of macromolecule aqueous solution, wherein the nano polymer particle aqueous dispersion with spiropyrane is synthesized by fine emulsion through polymerization reaction. The invention designs and synthesizes the macromolecule hydrogel with photoresponse characteristic to ultraviolet light; as the synthesized polymer material contains methacrylic acid spiropyrane functional group, the macromolecule hydrogel shows ultraviolet photochromic characteristic, has the advantages of being easy to prepare, developing timely and obviously and being safe, and has creativity 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 function of UV 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 special care mus...

Claims

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Application Information

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Patent Type & Authority Applications(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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