Self-restoration microcapsule and preparation method thereof

A technology of self-healing microcapsules and microcapsule suspension, which is applied in the direction of microcapsule preparation and microsphere preparation, which can solve the problems of reducing the thermal performance of materials, low thermal performance of microcapsules, and complicated synthesis process of microcapsules, and achieve good interfacial interaction Excellent strength and heat resistance, highlighting the effect of heat resistance

Active Publication Date: 2016-12-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the introduction of inorganic materials can improve the heat resistance of microcapsules, its usage has a certain limit, otherwise the interface force between microcapsules and matrix materials will be significantly reduced.
The use of polymers as the capsule wall material ...

Method used

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  • Self-restoration microcapsule and preparation method thereof
  • Self-restoration microcapsule and preparation method thereof
  • Self-restoration microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 5g of polybenzimidazole powder in 90g of N,N-dimethylacetamide, after obtaining a clear and transparent solution, add 20g of bisphenol A type epoxy resin (the trade mark is E-51) under stirring conditions, and then stir Under certain conditions, the above mixed solution was dispersed in 1000 g of deionized water, and after 0.5 hour, a suspension of microcapsules was obtained. After washing with deionized water, suction filtration, and vacuum drying at room temperature for 45 hours, the microcapsule product is obtained as a light yellow powder. The storage period at room temperature is more than 1 year, and the yield is about 98%. figure 1 It is a scanning electron microscope (SEM) picture of the microcapsules in Example 1. The thermal decomposition temperature at 5wt% weight loss is 338°C.

Embodiment 2

[0025] 5g of polybenzimidazole powder was added to 90g of N,N-dimethylacetamide, and after the solution became transparent, 30g of novolak epoxy resin (brand F-51) was added under stirring conditions to obtain a mixed solution. Under stirring conditions, the above mixed solution was dispersed in 800 g of deionized water, and after 1 hour, a microcapsule suspension was obtained. After washing with deionized water, suction filtration, and vacuum drying at room temperature for 50 h, the microcapsule product was obtained as a light yellow powder. The storage period at room temperature was more than 1 year, and the yield was about 100%. figure 2 It is a scanning electron microscope (SEM) picture of the synthesized microcapsules in Example 2. The thermal decomposition temperature at 5wt% weight loss is 352°C.

Embodiment 3

[0027] Add 10g of polybenzimidazole powder to 100g of N,N-dimethylacetamide. After the solution is clear and transparent, add 60g of bisphenol A epoxy resin (brand E44) under stirring conditions. The above mixed solution was added to 2000 g of aqueous solution containing 10 g of styrene-maleic anhydride copolymer, and microcapsule suspension was obtained after 2 hours. After washing with deionized water, suction filtration, and vacuum drying at room temperature for 45 hours, the microcapsule product is obtained as a light yellow powder. The storage period at room temperature is more than 1 year, and the yield is about 100%. image 3 It is the SEM figure of the microcapsule of 3 in the embodiment. The thermal decomposition temperature at 5wt% weight loss is 346°C.

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Abstract

The invention relates to a self-restoration microcapsule and a preparation method thereof. Polybenzimidazole is dissolved into a solvent; then, epoxy compounds are added to obtain a mixed solution; next, the mixed solution is dispersed into a deionized water solution containing surfactants or deionized water; after 0.5 to 2 hours, microcapsule suspension liquid is obtained; the microcapsule suspension liquid is washed by the deionized water, and is subjected to suction filtration and vacuum drying to obtain the self-restoration microcapsule. The polybenzimidazole material is used as a wall material; epoxy resin/epoxy vinyl resin is used as a core material; the polybenzimidazole microcapsule is prepared by a solvent volatilization method. The obtained microcapsule has excellent heat-resistant performance, and can be used for restoring damage defects of material cracks and the like; the preparation method is simple and convenient; the industrialization is easy.

Description

technical field [0001] The invention relates to a microcapsule synthesis technology, in particular to a polybenzimidazole self-repairing microcapsule and a preparation method thereof. Background technique [0002] At present, microcapsule self-healing materials containing repairing agents have received widespread attention. This self-healing functional material can obviously restore the properties of the material, especially the mechanical properties. The microcapsules release the capsule core repair agent to the crack, and the repair agent can undergo polymerization reaction to fill the crack and bond the crack surface under proper control conditions, so as to achieve the purpose of repairing the performance of the material. Therefore, the synthesis of microcapsules with self-healing ability has important practical value and is of positive significance for promoting the development of self-healing materials. However, the microcapsules commonly used to prepare self-healing ...

Claims

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Application Information

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IPC IPC(8): B01J13/12
CPCB01J13/12
Inventor 袁莉张权顾嫒娟梁国正
Owner SUZHOU UNIV
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