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A kind of preparation method of photosensitive hydrogel

A hydrogel and photosensitive technology, which is applied in the field of photosensitive hydrogel preparation, can solve problems such as difficult to remove and affect the purity of hydrogel components, and achieve good biocompatibility

Active Publication Date: 2020-11-06
阿里生物新材料(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above articles and patents use different host-guest molecules to prepare photosensitive hydrogels, but there are some problems: (1) Initiators are often used in the synthesis of polymers, which are difficult to be removed during post-processing , thus affecting the purity of the hydrogel components

Method used

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  • A kind of preparation method of photosensitive hydrogel
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Examples

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Effect test

Embodiment 1

[0026] Example 1: PEG-Azo aqueous solution and α-CD aqueous solution were mixed at room temperature according to the molar ratio of 1:1. Under stirring, no gel formed. Under UV irradiation, there is no sol-gel phase transition phenomenon.

Embodiment 2

[0027] Example 2: PEG-Azo aqueous solution and α-CD aqueous solution were mixed at room temperature according to the molar ratio of 1:2. Under stirring, no gel formed. Then the sol was exposed to an ultraviolet lamp with a wavelength of 365nm, and it was found that the sol gradually solidified into a gel, that is, a photosensitive hydrogel was obtained in this example.

Embodiment 3

[0028] Example 3: PEG aqueous solution and α-CD aqueous solution were mixed at room temperature according to the molar ratio of 1:3. Under stirring, a gel was formed. Then the gel was exposed to ultraviolet light with a wavelength of 365nm, and it was found that the phase transition of the gel did not occur.

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Abstract

The invention discloses a photosensitive-type hydrogel preparation method. The method comprises the following steps: 1) modifying PEG to obtain PEG-Azo; and 2) performing supramolecular self-assembly on PEG-Azo and alpha-CD to obtain the photosensitive-type hydrogel. The preparation method is simple, and mainly aims at the defect that a host material and a guest material are incompatible in the prior art, during the hydrogel preparation process, the host material and the guest material have good biological compatibility, and the obtained hydrogel can realize sol-gel transformation under ultraviolet light-visible light.

Description

technical field [0001] The invention relates to a method for preparing a photosensitive hydrogel, which belongs to the field of new functional materials. Background technique [0002] Hydrogel is a kind of soft substance with high water content, which is widely used in the fields of beauty, plastic surgery, medical treatment, medical research and other fields. It has extremely high added value and has attracted widespread attention and attention in the world. Among them, hydrogels (smart hydrogels) with special functional groups can respond to changes in the external environment, such as temperature, light, magnetism, and pH, thereby causing changes in the physical or chemical properties of the gel. On the other hand, the self-assembly of molecules can construct supramolecules with specific structural assembly units through their intermolecular forces and steric effects. [0003] In summary, introducing photoresponsive functional groups, such as azobenzene, into host molecu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L71/02C08L5/16C08G65/337C08G65/333
CPCC08G65/33396C08G65/337C08J3/075C08J2305/16C08J2471/02C08L5/16C08L71/02
Inventor 马肃王超
Owner 阿里生物新材料(常州)有限公司