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Self-repairing microcapsule, preparation method and application thereof

A technology of self-healing microcapsules and capsules, which is applied in the direction of microcapsule preparations and microsphere preparations. It can solve the problems of affecting the yield of capsules, affecting material properties, and long reaction time, and achieves excellent emulsification, dispersion, and stabilization effects. Synthesis The method is simple and the effect of improving stability

Active Publication Date: 2016-09-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction time is long, and an emulsifier needs to be added during the capsule preparation process, which will not only affect the performance of the material, but also affect the yield of the capsule

Method used

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  • Self-repairing microcapsule, preparation method and application thereof
  • Self-repairing microcapsule, preparation method and application thereof
  • Self-repairing microcapsule, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]Preparation of microcapsules with self-healing properties. The core material of the microcapsule particles and the shell of the microcapsule, that is, the ratio of the total mass of the core material of the microcapsule to the total mass of the shell material is the core-wall ratio of the microcapsule. Example 1 provides the ratio of raw materials for preparing microcapsules, and the core-to-wall ratio of the microcapsules is 4. Shown in raw material proportioning table 1 (the used raw material of this embodiment is all direct manufacturer's purchase):

[0046] Table 1 Embodiment 1 raw material ratio

[0047] raw material

Content by weight / part

epoxy resin

10

Styrene-maleic anhydride

1.3

n-Butyl glycidyl ether

1.8

gelatin

1

sodium hydroxide

3.4

Glutaraldehyde

0.1

Acetic acid

7

Deionized water

40

[0048] The preparation process is as follows:

[0049] (1) take eac...

Embodiment 2

[0058] Example 2 provides the raw material ratio of the microcapsules with a core-to-wall ratio of 3, as shown in Table 2, and the preparation process is the same as that of Example 1.

[0059] Table 2 Embodiment 2 raw material ratio

[0060] raw material

[0061] Observation results of the obtained compound capsule wall microcapsules prepared in this example through an optical microscope show that the dispersibility is good. When the core wall of the microcapsule is relatively small, its distribution density decreases, and the particle size distribution is not uniform at the same time.

Embodiment 3

[0063] A self-healing microcapsule, the capsule includes a capsule core and a complex wall coated on the outer surface of the capsule core, the capsule core is a repairing agent, and the complex wall is made of styrene-maleic anhydride and gelatin It is formed in combination, wherein the mass ratio of the restoration agent to styrene-maleic anhydride and gelatin is 5:2:1.

[0064] In this embodiment, the restorative agent is methyl methacrylate, and the specific preparation method includes the following steps:

[0065] (1) Dilute the restorative agent with a diluent to prepare a diluted repair agent solution;

[0066] (2) adding styrene-maleic anhydride to the alkali solution, heating, stirring to make it hydrolyzed, adjusting the pH value to 5, and obtaining a light yellow transparent solution;

[0067] (3) Warm up the light yellow transparent solution prepared in step (2) to 60°C, stir and disperse for 10 minutes, then add the dilute solution of restoration agent prepared i...

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Abstract

The invention relates to a self-repairing microcapsule, a preparation method and an application thereof. The microcapsule comprises a capsule core and a repairing microcapsule wall on the external surface of the capsule core, the capsule core is a repairing agent, the repairing microcapsule wall is composed of styrene-maleic anhydride and gelatin, wherein, the mass ratio of the repairing agent to styrene-maleic anhydride to gelatin is 5-15:1-2:1-5; the self-repairing microcapsule is prepared by employing a complex coacervation method; and the self-repairing microcapsule is used for repairing the cracks of cement-based materials. Compared with the prior art, the synthetic method is simple, synthetic efficiency is high, adverse impact of the noxious material and the additionally added emulsifier during a synthesis process can be better solved, the self-repairing microcapsule has environmental protection, and can be widely used for repairing the cracks of cement-based materials.

Description

technical field [0001] The invention belongs to the field of preparation of microcapsule materials, and relates to a self-healing microcapsule and a preparation method and application thereof. Background technique [0002] Concrete material is the most widely used and used material in the construction field today, and its service life depends to a large extent on its damage degree. As a typical failure form of concrete materials, cracks have an important impact on the safety and applicability of concrete structures. At present, although there are a large number of traditional methods for repairing concrete cracks, these traditional methods are mainly for post-event repair and regular maintenance of concrete structures, which not only does not have an obvious repair effect, but also generates a lot of costs. [0003] In recent years, smart concrete with self-healing function developed based on the principle of bionics has received extensive attention. Self-healing technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C04B20/10C04B24/26C04B24/28C04B24/08C04B22/08
CPCB01J13/02C04B20/104C04B24/281C04B24/26C04B24/28C04B24/08C04B22/08
Inventor 李文婷朱旭晶蒋正武杨正龙赵宇馨赵楠
Owner TONGJI UNIV
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