A super stable carbon dioxide foam and its preparation method and application
By using composite foaming agents and mixed gases, the stability and lifespan of carbon dioxide foam have been improved, solving the problem of easy breakage of carbon dioxide foam in cement paste in existing technologies, and realizing the preparation of foamed concrete with high foaming ratio and low settling distance.
CN122444540APending Publication Date: 2026-07-24SOUTH CHINA UNIV OF TECH
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Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SOUTH CHINA UNIV OF TECH
- Filing Date
- 2026-03-03
- Publication Date
- 2026-07-24
AI Technical Summary
Technical Problem
Existing carbon dioxide foam has problems such as reduced foaming performance, poor stability, and short lifespan due to excessive addition of foaming agent during the preparation process, making it difficult to use stably in cement paste.
Method used
A composite foaming agent is used, which includes a combination of nanoparticles, surfactants and thickeners. A mixture of carbon dioxide and nitrogen is used as the foaming gas, and the gas pressure and ratio are controlled to form a polygonal microstructure to improve stability.
Benefits of technology
An ultra-stable carbon dioxide foam with high foaming ratio, small settling distance, and low bleeding rate was prepared. It can be used stably in cement slurry and has good thermal insulation and carbon fixation capabilities.
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Figure CN122444540A_ABST
Abstract
The application discloses an ultra-stable carbon dioxide foam applied to the field of foam concrete, and a preparation method and application thereof, and the preparation method comprises the following steps: uniformly dispersing nanoparticles in water through ultrasonic, to prepare a nanoparticle suspension; adding the nanoparticle suspension into a surfactant and a thickening agent, and uniformly stirring to prepare a composite foaming agent; and a foaming machine is used to suck the composite foaming agent, and mixed gas of carbon dioxide and nitrogen is used as foaming gas to prepare the ultra-stable carbon dioxide foam. Compared with the existing carbon dioxide foam preparation method, the carbon dioxide foam prepared by the ultra-stable carbon dioxide foam preparation method has a higher foaming multiple, and the foam is not easy to break in stirring and has better stability in a high-alkali environment of a cement paste. The high stability and the characteristic of not easy to break in stirring can be used for preparing light-weight foam concrete, so that the building material not only has the performance of heat preservation and insulation, but also has better carbon fixation capacity, and promotes the green and low-carbon development of the building industry.
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