Preparation method of magnetic response self-repairing intelligent hydrogel

A self-healing and magnetic response technology, applied in the field of hydrogel preparation, can solve the problems of soft texture and poor plasticity, and achieve the effects of good biocompatibility, short self-healing time, and long useful life

Active Publication Date: 2019-06-14
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional gel materials are usually soft in texture, can only undergo simple

Method used

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  • Preparation method of magnetic response self-repairing intelligent hydrogel

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Embodiment 1

[0033] A method for preparing a magnetically responsive self-healing smart hydrogel, comprising the following steps:

[0034] (1) Preparation of ferric oxide microparticles: Weigh 9.12g of ferrous sulfate heptahydrate and 21.7g of ferric chloride hexahydrate and dissolve them in 50mL of distilled water, then add 50mL of ammonia water to the system, heat in a water bath at 40°C and 1000rmp , after the solution turns from light brown to black, continue to react for 30 minutes, then raise the temperature to 80°C to make it completely crystallized, and obtain magnetic ferric oxide microparticles;

[0035] (2) Preparation of polyvinyl alcohol solution: Weigh 5 g of polyvinyl alcohol solids, add them to 45 g of distilled water, heat and stir in a water bath at 90° C. at a stirring speed of 500 rpm, and continue for 2 hours until the polyvinyl alcohol is completely dissolved to obtain a uniform solution;

[0036] (3) Preparation of cross-linking solution: Weigh 1.5 g of boric acid po...

Embodiment 2

[0043] A method for preparing a magnetically responsive self-healing smart hydrogel, comprising the following steps:

[0044] (1) Preparation of ferric oxide microparticles: Weigh 9.12g of ferrous sulfate heptahydrate and 21.7g of ferric chloride hexahydrate and dissolve them in 50mL of distilled water, then add 50mL of ammonia water to the system, heat in a water bath at 40°C and 1000rmp , after the solution turns from light brown to black, continue to react for 30 minutes, then raise the temperature to 80°C to make it completely crystallized, and obtain magnetic ferric oxide microparticles;

[0045] (2) Preparation of polyvinyl alcohol solution: Weigh 5 g of polyvinyl alcohol solids, add them to 45 g of distilled water, heat and stir in a water bath at 90° C. at a stirring speed of 500 rpm, and continue for 2 hours until the polyvinyl alcohol is completely dissolved to obtain a uniform solution;

[0046] (3) Preparation of cross-linking solution: Weigh 0.5 g of boric acid po...

Embodiment 3

[0051] A method for preparing a magnetically responsive self-healing smart hydrogel, comprising the following steps:

[0052] (1) Preparation of ferric oxide microparticles: Weigh 9.12g of ferrous sulfate heptahydrate and 21.7g of ferric chloride hexahydrate and dissolve them in 50mL of distilled water, then add 50mL of ammonia water to the system, heat in a water bath at 40°C and 1000rmp , after the solution turns from light brown to black, continue to react for 30 minutes, then raise the temperature to 80°C to make it completely crystallized, and obtain magnetic ferric oxide microparticles;

[0053] (2) Preparation of polyvinyl alcohol solution: Weigh 5 g of polyvinyl alcohol solids, add them to 45 g of distilled water, heat and stir in a water bath at 90° C. at a stirring speed of 500 rpm, and continue for 2 hours until the polyvinyl alcohol is completely dissolved to obtain a uniform solution;

[0054] (3) Preparation of cross-linking solution: Weigh 0.5 g of boric acid po...

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Abstract

The invention discloses a preparation method of magnetic response self-repairing intelligent hydrogel. The preparation method comprises the following steps: (1) preparing ferroferric oxide micro-particles; (2) preparing a polyvinyl alcohol solution; (3) adding water into boric acid and sodium carbonate powder, and conducting stirring until the solution becomes uniform, colorless and transparent from turbid, wherein the sodium carbonate is used for adjusting the pH of the solution; (4) adding the ferroferric oxide micro-particles obtained in the step (1) into the polyvinyl alcohol solution obtained in the step (2), conducting uniform dispersing, slowly adding the colorless transparent solution obtained in the step (3), and conducting continuous stirring until no new gel appears; and (5) taking out the gel obtained in the step (4), conducting soaking and washing to obtain the magnetic response self-repairing intelligent hydrogel. The magnetic response self-repairing intelligent hydrogelhas the advantages of being high in magnetic response controllability, non-toxic, harmless, low in cost and the like.

Description

technical field [0001] The invention belongs to the field of polymer composite functional materials, and in particular relates to a preparation method of hydrogel. Background technique [0002] Magnetic hydrogels have broad application prospects in the targeted release of medical drugs, smart circuit components, and soft robots. Among them, improving the strength and lifetime of the gel is of great significance for realizing the efficient utilization of materials. Traditional gel materials are usually soft in texture, can only undergo simple stretching and compression deformation after molding, and have poor plasticity. [0003] Ferroferric oxide has ferromagnetism. If the particle radius is in the micron level, it is called ferromagnetic particle of ferroferric oxide. In the modern electrical and information society, magnetic materials are widely used. As a multifunctional magnetic material, ferroferroic oxide magnetic material has been widely used in the fields of tumor...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08K3/22C08J3/075C08J3/24
Inventor 吴义强卿彦苏雨乔建政赵星许瀚
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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