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Preparation method of novel magnetism macromolecule hydrogel

A polymer hydrogel and hydrogel technology, applied in the field of polymer materials, can solve the problems of low remanence and uneven magnetic distribution of magnetic hydrogels, and achieve the effect of low remanence and overcoming uneven magnetic distribution

Inactive Publication Date: 2013-06-05
扬州爱科新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the above-mentioned prior art, the object of the present invention is to provide a method for preparing a magnetic polymer hydrogel, the magnetic polymer hydrogel prepared by this method not only overcomes the problem of uneven magnetic distribution, Moreover, the magnetic particles in the gel have regular octahedral morphology with an average size of about 100 nm, so that the magnetic hydrogel has extremely low remanence.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The preparation method of magnetic polymer hydrogel, the steps are as follows:

[0015] Step 1: With 2-acrylamide-2-sodium methylpropane sulfonate as a monomer, methylenebisacrylamide is a crosslinking agent, and a crosslinking density of 4% is formed by free radical polymerization induced by 365nm ultraviolet light The poly 2-acrylamide-2-methylpropanesulfonate sodium anionic hydrogel;

[0016] Step 2: FeSO 4 with Fe 2 (SO 4 ) 3 Mix according to the ratio of mass to 11:1, add deionized water to prepare 1.89M saturated iron ion solution;

[0017] Step 3: Immerse the poly 2-acrylamide-2-methylpropanesulfonate sodium anionic hydrogel described in step 1 into the saturated iron ion solution described in step 2, and soak for 24 hours at room temperature to make the anionic water Gel and iron ions are completely adsorbed;

[0018] Step 4: Prepare 0.5M NaOH solution;

[0019] Step 5: Soak the hydrogel adsorbed with iron ions in step 3 into the NaOH solution in step 4, ...

Embodiment 2

[0022] The preparation method of magnetic polymer hydrogel, the steps are as follows:

[0023] Step 1: With 2-acrylamide-2-sodium methylpropane sulfonate as a monomer, methylenebisacrylamide is used as a crosslinking agent, and a crosslinking density of 7% is formed by free radical polymerization induced by 365nm ultraviolet light The poly 2-acrylamide-2-methylpropanesulfonate sodium anionic hydrogel;

[0024] Step 2: FeSO 4 with Fe 2 (SO 4 ) 3 Mix according to the ratio of mass to 11:1, add deionized water to prepare 1.89M saturated iron ion solution;

[0025] Step 3: Immerse the poly 2-acrylamide-2-methylpropanesulfonate sodium anionic hydrogel described in step 1 into the saturated iron ion solution described in step 2, and soak for 24 hours at room temperature to make the anionic water Gel and iron ions are completely adsorbed;

[0026] Step 4: Prepare 0.5M NaOH solution;

[0027] Step 5: Soak the hydrogel adsorbed with iron ions in step 3 into the NaOH solution in ...

Embodiment 3

[0030] The preparation method of magnetic polymer hydrogel, the steps are as follows:

[0031] Step 1: With 2-acrylamide-2-sodium methylpropane sulfonate as a monomer, methylene bisacrylamide is used as a crosslinking agent, and a crosslinking density of 10% is formed by free radical polymerization induced by 365nm ultraviolet light The poly 2-acrylamide-2-methylpropanesulfonate sodium anionic hydrogel;

[0032] Step 2: FeSO 4 with Fe 2 (SO 4 ) 3 Mix according to the ratio of mass to 11:1, add deionized water to prepare 1.89M saturated iron ion solution;

[0033] Step 3: Immerse the poly 2-acrylamide-2-methylpropanesulfonate sodium anionic hydrogel described in step 1 into the saturated iron ion solution described in step 2, and soak for 24 hours at room temperature to make the anionic water Gel and iron ions are completely adsorbed;

[0034] Step 4: Prepare 0.5M NaOH solution;

[0035] Step 5: Soak the hydrogel adsorbed with iron ions in step 3 into the NaOH solution i...

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Abstract

The invention relates to a preparation method of a magnetism macromolecule hydrogel. In the forming process of the novel magnetism macromolecule hydrogel, iron ions enter a three-dimensional network structure of poly2-acrylamide-2-methylpropane sodium anionic hydrogel through the diffusion action and are adsorbed by sulfonate radicals in the anionic hydrogel through electrostatic interaction and stably to be stably and uniformly distributed in the hydrogel; then the iron ions generate octahedral Fe3O4 magnetic particles with the size of about 50nm to 100nm in situ in a special macromolecule hydrogel network microenvironment by a simple and soft coprecipitation method, thereby obtaining the magnetism macromolecule hydrogel with irregular and uniform-distributed Fe3O4 magnetic particles. The magnetism macromolecule hydrogel prepared by the method overcomes the problem of non-uniform magnetism distribution; and magnetic particles in the hydrogel have the appearance of regular octahedrons with the average size of 50nm-10nm, thereby leading the magnetism hydrogel to have very low residual magnetism.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a magnetic polymer hydrogel. Background technique [0002] Magnetic polymer hydrogels introduce magnetic nanoparticles into hydrogels with good biocompatibility, which have broad application prospects in the field of biomedicine. This intelligent hydrogel with "environmental response" has broad application prospects in drug sustained release systems, targeted therapy, biosensors, medical analysis and medical diagnosis. Fe 3 o 4 Because of its good magnetic properties and biocompatibility, it is usually used as a magnetic component in magnetic polymer hydrogel materials. Currently, Fe 3 o 4 The synthesis methods of magnetic polymer hydrogel materials can be divided into two categories, the most commonly used method is the embedding method, that is, the pre-synthesized magnetic particles are dispersed into the polymer gel monomer s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/24C08K3/22C08J3/075C08F220/58C08F222/38
Inventor 陈咏梅高扬杨志懋黄坤
Owner 扬州爱科新材料科技有限公司
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