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A kind of preparation method of self-repairing epoxy resin microcapsule

A technology of epoxy resin and microcapsules, which is applied in the field of preparation of epoxy resin microcapsules for self-repair, can solve the problems of poor compatibility of capsule wall matrix materials, cumbersome process, and poor compatibility, and achieve compatibility Good, simple preparation process, environment-friendly effect

Active Publication Date: 2019-03-29
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, urea-formaldehyde and melamine-formaldehyde resin-coated epoxy resin microcapsules need to adjust the pH value of the system many times, and the process is cumbersome; the use of molecular emulsifiers pollutes the environment; and the capsule wall itself is not compatible with the matrix material.
Polystyrene-coated epoxy resin microcapsules also have poor compatibility with matrix materials

Method used

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  • A kind of preparation method of self-repairing epoxy resin microcapsule
  • A kind of preparation method of self-repairing epoxy resin microcapsule
  • A kind of preparation method of self-repairing epoxy resin microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Preparation of cycloaliphatic epoxy resin microcapsules using glycidyl methacrylate as wall monomer

[0027] Disperse 10g of glycidyl methacrylate in 200g of water, pass in condensed water at 200rpm, heat up to the reaction temperature, pour 20ml of 1% water-soluble initiator solution, and continue the reaction for 16h; Add 1g of concentrated sulfuric acid to the solution and react at 200rpm and 55℃ for 12h to obtain a hydrolyzed polyglycidyl methacrylate nanoparticle solution; will contain 6g epoxy resin ERL-4221, 2.4g glycidyl methacrylate, 0.6 g 1,1-diphenylethylene and 0.06g azobisisobutyronitrile oil phase are mixed uniformly, then poured into a 2% concentration of glycidyl methacrylate nanoparticle solution, emulsified at 1000rpm for 30min, then heated After reacting for 8 hours at 70°C, the product was centrifuged and washed with water and dried to obtain epoxy resin microcapsules.

Embodiment 2

[0028] Example 2: Preparation of cycloaliphatic epoxy resin microcapsules using glycidyl methacrylate as wall monomer

[0029] Disperse 10g of glycidyl methacrylate in 200g of water, pour in condensed water at 200rpm, heat up to the reaction temperature, pour 20ml of a 1% water-soluble initiator solution, and continue the reaction for 16h; Add 1g of concentrated sulfuric acid to the solution and react at 200rpm and 55℃ for 12h to obtain a hydrolyzed polyglycidyl methacrylate polymer nanoparticle solution; will contain 6g epoxy resin ERL-4221, 2.4g glycidyl methacrylate , 0.6g of 1,1-diphenylethylene and 0.06g of azobisisobutyronitrile in the oil phase, and then pour into the solution of polyglycidyl methacrylate nanoparticles with a concentration of 2%, emulsify for 30min at 1000rpm Then, the temperature was raised to 60° C., and after 24 hours of reaction, the product was centrifuged and washed with water and dried to obtain epoxy resin microcapsules.

Embodiment 3

[0030] Example 3: Preparation of cycloaliphatic epoxy resin microcapsules using glycidyl methacrylate as wall monomer

[0031] Disperse 10g of glycidyl methacrylate in 200g of water, pass in condensed water at 200rpm, heat up to the reaction temperature, pour 20ml of 1% water-soluble initiator solution, and continue the reaction for 16h; Add 1g of concentrated sulfuric acid to the solution and react at 200rpm and 55℃ for 12h to obtain a hydrolyzed polyglycidyl methacrylate nanoparticle solution; will contain 6g epoxy resin ERL-4221, 2.4g glycidyl methacrylate, 0.6 g 1,1-Diphenylethylene and 0.06g azobisisobutyl nitrile oil phase are mixed uniformly, then poured into the solution of polyglycidyl methacrylate nanoparticles with a concentration of 2%, emulsified at 1000rpm for 30min, The temperature was raised to 80°C, and after 4 hours of reaction, the product was centrifuged and washed and dried to obtain epoxy resin microcapsules.

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Abstract

The invention relates to a method for preparing a self repair epoxy resin microcapsule. Poly-glycidyl methacrylate nano particles which are prepared through soap-free emulsion and acidified are amphiphilic particles and are used in a Pickering emusion, and a preparation process is simple and environmentally friendly; the homemade poly-glycidyl methacrylate nano particles are utilized to prepare the Pickering emusion, an oil phase and an aqueous phase are mixed to be directly emulsified, and the epoxy resin microcapsule is prepared through one-step reaction under the conditions of a certain temperature and an initiator. The epoxy resin microcapsule is simple in preparation process and mature in technology, the nano particles serve as an emulgator and are environmentally friendly, and a product is good in compatibility with an epoxy resin base material. The prepared epoxy resin microcapsule has very good application prospects in the field of self repair smart materials.

Description

Technical field [0001] The invention belongs to the field of preparation of microcapsule-type self-repair materials, and relates to a preparation method of epoxy resin microcapsules for self-repair. Background technique [0002] Microcapsules are tiny containers with a core-shell structure formed by coating a dispersible solid, liquid or gas with a film-forming material. The characteristic of the microcapsule is to use the capsule wall material to protect the core material from the external environment, so that the capsule core can play its due role. In recent years, microcapsules coated with repair agents have played a huge role in the preparation of self-healing materials. The principle of the microcapsule self-healing material is that the microcapsules coated with the repairing agent are filled into the matrix material. The microcracks generated by the matrix material crack the microcapsules, and the released repairing agent reacts to fill the damaged matrix. Materials to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/06
CPCB01J13/06
Inventor 张秋禹乔磊李春梅
Owner NORTHWESTERN POLYTECHNICAL UNIV