Preparation method of self-repairing capsule based on carbonization effect, and self-repairing capsule
A technology of capsule preparation and carbonization, applied in microcapsule preparation, microsphere preparation and other directions, can solve the problems of insufficient hardness of self-healing capsules, affecting the mechanical properties of matrix structure, etc., to improve hardness and strength, prolong service life and durability Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0032] Carbonation refers to the process of chemical reaction between carbon dioxide in the air and cement hydration products. Under carbonization of the quick-hardening cement shell of the inner capsule wall, carbon dioxide reacts with the dissolved calcium hydroxide to form soluble calcium carbonate precipitates to fill in the pores of the structure, reducing the overall porosity of the inner capsule wall; The C-S-H gel in the cement inner capsule wall is the main binding component, and the microstructure undergoes a large reorganization, which also increases the macroscopic strength of the cement-based material.
[0033] Embodiments of the present invention provide a method for preparing self-healing capsules based on carbonization, such as figure 1 shown, including:
[0034] preparing capsule core particles, wrapping the inner capsule wall on the surface of the capsule core particles to form capsule particles with inner capsule walls;
[0035] Carbonizing the capsule par...
Embodiment 2
[0060] This embodiment provides a self-healing capsule, obtained by the preparation method described in Example 1, comprising capsule core particles, and a composite capsule wall wrapped outside the capsule core particles; wherein, the composite capsule wall includes an inner capsule wall and outer capsule wall.
[0061] In this embodiment, the inner capsule wall is made of rapid-hardening cement material, which can be quickly solidified and hardened in a relatively short period of time to form an early-strength hard shell to protect the capsule core particles; the outer capsule wall is made of polymer materials, such as polyvinyl alcohol Material.
Embodiment 3
[0063] In this example, the morphology and hardness of the capsules before and after carbonization were observed and tested, and two types of capsules were mixed into the mortar matrix respectively, and compared with the pure mortar specimens, the changes in its mechanical properties were evaluated.
[0064] Wherein, preparing the capsule under carbonization comprises the following steps:
[0065] First, prepare the mixed powder of the capsule core repair agent. Weigh 300g of cement, 100g of magnesia expansion agent and 100g of silica fume powder in sequence with an electronic balance, and all pass through a fine sieve of 80 μm. Add the powder into the slurry mixer and stir at a revolution speed of 60±5r / min and an autorotation speed of 120±5r / min to obtain a uniformly mixed powder restorative material.
[0066] Secondly, prepare a polyvinyl alcohol (PVA) solution with a mass fraction of 4%. Weigh 20g of PVA particles with an alcoholysis degree greater than 98% and a molecul...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Particle size | aaaaa | aaaaa |
| Particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More