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Silicon dioxide wall material microcapsule as well as preparation method and application thereof

A silica and microcapsule technology, applied in microcapsule preparation, microsphere preparation, etc., can solve the problems of unsatisfactory self-healing effect of concrete cracks, small particle size of silica wall material microcapsules, application limitations, etc. Excellent UV resistance, stable structure and performance, and the effect of reducing production costs

Inactive Publication Date: 2021-06-04
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the described deficiencies of the prior art, provide a kind of silica wall material microcapsule and its preparation method and its application, to solve existing silica wall material microcapsule containing capsule core due to particle diameter Small technical issues that limit application in self-healing concrete
[0007] Another object of the present invention is to provide a concrete crack self-healing material to solve the technical problem that the existing concrete crack self-healing material has poor compatibility with the cement matrix, which leads to its unsatisfactory effect on concrete crack self-healing

Method used

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  • Silicon dioxide wall material microcapsule as well as preparation method and application thereof
  • Silicon dioxide wall material microcapsule as well as preparation method and application thereof

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preparation example Construction

[0032] On the other hand, the embodiment of the present invention also provides a preparation method of the above-mentioned silica wall material microcapsules. The preparation method technological process of described silica wall material microcapsule is as follows figure 1 As shown, it includes the following steps:

[0033] Step S01: mixing silicon source material, epoxy concrete repair agent and compatibilizer to form an oil phase;

[0034] Step S02: dissolving the non-ionic surfactant in water to form an aqueous phase;

[0035] Step S03: mixing and emulsifying the oil phase and the water phase to prepare an oil-in-water emulsion;

[0036] Step S04: Adding a catalyst to the oil-in-water emulsion to promote the hydrolysis reaction of the silicon source material contained in the oil phase in the emulsion droplets at the oil / water interface to generate silica wall material microcapsules.

[0037] Wherein, in the step S01, the epoxy concrete repair agent has oily characterist...

Embodiment 1

[0053] This embodiment provides a silica wall material microcapsule and a cultivation method for its preparation method. The silica wall material microcapsules include a silica microcapsule shell and a capsule core, and the silica microcapsule shell is coated on the capsule core. Wherein, the average particle size of the silica microcapsules is 110.7 μm, the average wall thickness of the shell is 1.8 μm, and the capsule core contains alicyclic epoxy UVR-6128.

[0054] The preparation method of the silica wall material microcapsules comprises the following steps:

[0055] S11: Take 5g of epoxy resin E-51 (viscosity 11,000mPa·s), 4g of cycloaliphatic epoxy UVR-6128, and 10g of ethyl orthosilicate, and stir and mix at room temperature until a uniform oil phase is obtained;

[0056] S12: Mix 2g of polyether poloxame 407 and 150mL of deionized water with magnetic stirring at 35°C to form a solution, that is, a homogeneous aqueous phase;

[0057] S13: Slowly drop the oil phase int...

Embodiment 2

[0061] This embodiment provides a silica wall material microcapsule and a cultivation method for its preparation method. The silica wall material microcapsules include a silica microcapsule shell and a capsule core, and the silica microcapsule shell is coated on the capsule core. Wherein, the average particle size of the silica microcapsules is 110.7 μm, the average wall thickness of the shell is 1.8 μm, and the capsule core contains alicyclic epoxy ERL-4221.

[0062] The preparation method of the silica wall material microcapsules comprises the following steps:

[0063] S11: Take 5g of epoxy resin E-44 (viscosity 20,000mPa·s), 3g of cycloaliphatic epoxy ERL-4221, and 10g of phenyltrimethoxysilane at room temperature with magnetic stirring and mixing until a uniform oil phase is obtained;

[0064] S12: Mix 2g of PS50-b-PEO114 nonionic amphiphilic block polymer (MW:PS:5000, PEO:5000Dalton) and 150mL of deionized water with magnetic stirring at 35°C to make a solution, that is,...

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Abstract

The invention discloses a silicon dioxide wall material microcapsule as well as a preparation method and application thereof. The silicon dioxide wall material microcapsule comprises a silicon dioxide microcapsule shell and a capsule core, the capsule core is coated with the silicon dioxide microcapsule shell, the material of the capsule core comprises an epoxy concrete repairing agent, and the average particle size of the silicon dioxide wall material microcapsule is larger than 100 microns. The silicon dioxide wall material microcapsule is large in particle size, the shell of the silicon dioxide microcapsule is complete, and the capsule core can be effectively and stably coated. Besides, the silicon dioxide wall material microcapsule with large particle size can be effectively broken under external force to release the capsule core, so that the effect of the capsule core is exerted, and the self-repairing effect on concrete cracks is realized. Therefore, the silicon dioxide wall material microcapsule can be applied to self-repairing of concrete cracks. The preparation method can effectively guarantee that the prepared silicon dioxide wall material microcapsule is stable in structure and performance and large in particle size, and industrial production can be achieved.

Description

technical field [0001] The invention relates to the technical field of microcapsules and building materials, in particular to silica wall material microcapsules and a preparation method and application thereof. Background technique [0002] Due to the chemical stability of silica, as well as the characteristics of non-toxicity and affinity with biological tissues, silica wall material microcapsules have been widely used in different fields, such as in cosmetics, food medicine, textile and Plastic industry, phase change energy storage and other fields have a wide range of applications. [0003] Generally, there are two types of silica microcapsules: hollow and core-containing. For hollow silica microcapsules, it is relatively easy to obtain monodisperse nanoscale particles. Usually, the particle size of the hollow silica microcapsules generally does not exceed 60 μm. The larger the particle size, the more difficult it is to maintain the monodisperse characteristics. This ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/10C04B14/06B01J13/02
CPCC04B20/1066C04B14/062B01J13/02
Inventor 朱光明任禹敏
Owner SHENZHEN UNIV
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