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Multifunctional microcapsule used for self-repairing of materials and preparation method thereof

A multifunctional microcapsule technology, which is applied in the direction of microcapsule preparation and microsphere preparation, can solve the problems of lack of research and achieve the effect of simple preparation process and easy industrialization

Inactive Publication Date: 2019-04-02
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above shows that the microcapsules prepared with ethyl cellulose as the wall material have excellent self-healing properties. However, most of the self-healing microcapsule wall materials using ethyl cellulose are coated with animal and vegetable oils and epoxy resin adhesives. It is the most commonly used core material repair agent in the field of self-healing microcapsules, but the research on self-healing microcapsules coated with ethyl cellulose epoxy resin adhesive is relatively lacking.

Method used

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  • Multifunctional microcapsule used for self-repairing of materials and preparation method thereof
  • Multifunctional microcapsule used for self-repairing of materials and preparation method thereof
  • Multifunctional microcapsule used for self-repairing of materials and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Ethyl cellulose with a viscosity of 20 was used as the wall material to prepare epoxy resin E-51 microcapsules.

[0029] Dissolve 25g of gelatin in 500g of deionized water to form a 5% gelatin solution as the water phase; then dissolve 5g of ethyl cellulose with a viscosity of 20 and 5g of epoxy resin E-51 in 60ml of dichloromethane, and ultrasonically dissolve to form a uniform The mixed solution is used as the oil phase; finally, use a rubber dropper to slowly add the oil phase to the water phase and stir at 800r / min to form an oil-in-water emulsion. After the mixed solution is added dropwise, continue stirring at a temperature of 30°C 5h, at this time the surface of the microcapsules is solidified, reduce the rotation speed modulation to 600r / min, and raise the temperature to 42°C and continue stirring for 2h, so that the solvent can be fully volatilized. Finally, wash with water and dry at room temperature to obtain microcapsules.

Embodiment 2

[0030] Example 2: Ethyl cellulose with a viscosity of 7 was used as the wall material to prepare epoxy resin E-51 microcapsules.

[0031] Dissolve 25g of gelatin in 500g of deionized water to form a 5% gelatin solution as the water phase; then dissolve 5g of ethyl cellulose with a viscosity of 7 and 5g of epoxy resin E-51 in 60ml of dichloromethane, and ultrasonically dissolve to form a uniform The mixed solution is used as the oil phase; finally, use a rubber dropper to slowly add the oil phase to the water phase and stir at 900r / min to form an oil-in-water emulsion. After the mixed solution is added dropwise, continue stirring at a temperature of 30°C 5h, at this time the surface of the microcapsules is solidified, reduce the rotation speed modulation to 600r / min, and raise the temperature to 42°C and continue stirring for 2h, so that the solvent can be fully volatilized. Finally, wash with water and dry at room temperature to obtain microcapsules.

Embodiment 3

[0032] Example 3: Epoxy resin E-51 microcapsules were prepared by using ethyl cellulose with a viscosity of 14 as the wall material.

[0033] Dissolve 25g of gelatin in 500g of deionized water to form a gelatin solution with a concentration of 5% as the water phase; then dissolve 5g of ethylcellulose with a viscosity of 14 and 5g of epoxy resin E-51 in 60ml of dichloromethane, and ultrasonically dissolve to form a uniform The mixed solution is used as the oil phase; finally, slowly drop the oil phase into the water phase with a rubber dropper and stir at 1000r / min to form an oil-in-water emulsion. After the mixed solution is added dropwise, continue stirring at a temperature of 30°C 5h, at this time the surface of the microcapsules is solidified, reduce the rotation speed modulation to 600r / min, and raise the temperature to 42°C and continue stirring for 2h, so that the solvent can be fully volatilized. Finally, wash with water and dry at room temperature to obtain microcapsul...

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Abstract

The invention belongs to the field of preparation of self-repairing microcapsule materials and relates to a multifunctional microcapsule used for self-repairing of materials and a preparation method thereof. The microcapsule is prepared with ethyl cellulose being a wall material and epoxy resin adhesive being a core material and includes, by mass, 0.7 to 7.4 parts of epoxy resin, 0.6 to 5.6 partsof an emulsifier, 0.7 to 2.5 parts of ethyl cellulose, 12.7 to 27.8 parts of an organic solvent, and 59.2 to 84.1 parts of deionized water. The multifunctional microcapsule has a round appearance andhas a plurality of penetrating and uniform pores thereon. What is the multifunctionality of the microcapsule is the microcapsule can achieve self-repairing of the materials through two releasing modeof diffusion release of pores in the wall material and / or breaking release of the wall material. The multifunctional microcapsule is green and pollution-free. The preparation method is simple and is easy to industrialize.

Description

technical field [0001] The invention belongs to the field of preparation of microcapsule self-repair materials, and relates to a multifunctional microcapsule for material self-repair and a preparation method thereof. Background technique [0002] The self-healing microcapsule is a micro-container with a self-healing function that is formed by wrapping a core material repair agent with a wall material polymer. Self-healing microcapsules can not only preserve the activity of core materials, but also repair damaged materials, and the controlled release of core material repair agents is the key to achieve the repair effect of self-healing microcapsules. Therefore, it is very important to choose a suitable wall material to wrap the core repair agent. [0003] At present, the wall materials of self-healing microcapsules are mainly urea-formaldehyde resin and melamine resin, which not only cannot meet the needs of high-performance materials, but also the self-healing microcapsules...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/04B01J13/20
CPCB01J13/04B01J13/203
Inventor 王信刚夏龙徐伟扶兴国
Owner NANCHANG UNIV
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