Preparation method of electrical stimulation-near infrared dual response high strength hydrogel

A dual-response, hydrogel technology, applied in the field of functional materials, can solve the problems of poor stimuli-response sensitivity, single stimuli-response mode, and restrictions on the application of hydrogels, and achieve favorable adsorption, good stimuli-response sensitivity, and good mechanical properties. performance effect

Inactive Publication Date: 2016-08-24
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the temperature change of traditional temperature-responsive hydrogels is limited by the external environment, the stimulus response method is single, the stimulus response sensitivity is not good, and the mechanical properties are poor, which restricts the application of hydrogels to a certain extent.

Method used

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  • Preparation method of electrical stimulation-near infrared dual response high strength hydrogel

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A, the preparation of hydrogel:

[0019] Dissolve N-isopropylacrylamide (NIPAM) with a concentration range of 0.226 g and soluble chitosan with a concentration range of 0.1 g in 2 ml of deionized water, and stir thoroughly. Then, 2 mg of the cross-linking agent N,N-methylenebisacrylamide (Bis) and 10 μl of TMEDA were sequentially added to the mixed solution. Nitrogen was blown into the solution to remove oxygen in the solution, and then 10 mg of ammonium persulfate (APS) was quickly added, and polymerized at room temperature for 10 h to obtain a hydrogel with a semi-interpenetrating network structure.

[0020] B. Adsorption of oxidants:

[0021] Soak the hydrogel prepared in step A for 10 hours in 5 ml ferric chloride solution with a concentration of 0.06 g / ml to obtain a hydrogel adsorbed with an oxidant.

[0022] C. Adsorption and oxidation of pyrrole monomer:

[0023] Soak the hydrogel that has absorbed the oxidizing agent in step B in 4ml of pyrrole solution with...

Embodiment 2

[0025] A, the preparation of hydrogel:

[0026] Dissolve 300ml of N,N-dimethylaminoethyl methacrylate (DMAEMA) and 0.1g of sodium alginate in 2ml of deionized water and stir well. Then, 2 mg of cross-linking agent N,N-methylenebisacrylamide (Bis) and 10 μl of TMEDA were sequentially added to the mixed solution. Nitrogen was blown into the solution to remove the oxygen in the solution, and then 20 mg of ammonium persulfate (APS) and 10 mg of sodium sulfite were quickly added, and polymerized at room temperature for 10 h to obtain a hydrogel with a semi-interpenetrating network structure.

[0027] B. Adsorption of oxidants:

[0028] Soak the hydrogel prepared in step A in 5ml of potassium persulfate solution with a concentration of 0.06g / ml for 10h to obtain a hydrogel with adsorbed oxidant.

[0029] C. Adsorption of pyrrole and oxidation of pyrrole:

[0030] Soak the hydrogel with the oxidant adsorbed in step B in 4ml of pyrrole solution with a mass fraction of 1%, and place...

Embodiment 3

[0032] The operation of this example is basically the same as that of Example 1, except that the natural macromolecular monomer used in Example 1 is replaced by sodium alginate.

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Abstract

The invention discloses a preparation method of electrical stimulation-near infrared dual response high strength hydrogel. The preparation method comprises the following steps: with taking a thermosensitive polymer monomer as a main raw material, adding a natural polymer to prepare thermosensitive deformable hydrogel with a semi-interpenetrating network structure; and then sequentially adsorbing an oxidizing agent and a pyrrole monomer by utilizing the swelling effect of the hydrogel so that the pyrrole monomer sufficiently permeates into a hydrogel network and is oxidized into polypyrrole by the oxidizing agent. Due to the introduction of polypyrrole, the prepared hydrogel has conductivity and near-infrared responsibility. When the hydrogel is in an energized state or is irradiated by near infrared light, temperature of the hydrogel rises, and the thermosensitive polymer network in the hydrogel structure contracts, so that volume and shape change, and light-electricity dual stimulation response is realized; meanwhile, stimulation response behaviour of the hydrogel has good sensitivity. The prepared hydrogel also has good mechanical properties and biocompatibility and can be applied to multiple fields of drug controlled release systems, memory element switches and the like.

Description

technical field [0001] The invention relates to a functional material, especially the preparation of a high-strength hydrogel with dual responses of electrical stimulation and near-infrared. Background technique [0002] Stimuli-responsive hydrogels have a certain proportion of hydrophilic and hydrophobic groups in their structure, and external stimuli can affect the hydrophilic / hydrophobic interactions of these groups or the hydrogen bonds between macromolecular chains, thereby changing the network structure of the hydrogel. , resulting in volume and shape changes. Therefore, it has a wide range of potential values ​​in the fields of controlled drug release systems, memory element switches, artificial muscles, and chemical separation, among which temperature-responsive hydrogels are one of the most concerned hydrogels. [0003] However, the temperature change of traditional temperature-responsive hydrogels is limited by the external environment, the stimulus response metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L33/24C08L33/14C08L5/08C08L5/04C08L79/04C08L89/00C08F220/54C08F220/34C08F222/38C08G73/06
CPCC08F220/34C08F220/54C08G73/0611C08J3/075C08L33/14C08L33/24C08L2205/03C08L2205/04C08L5/08C08L79/04C08L5/04C08L89/00C08F222/385
Inventor 鲁雄徐僮甘东林张晏宁韩璐刘柯志王振铭谢超鸣
Owner SOUTHWEST JIAOTONG UNIV
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