A method for preparing a geopolymer by jointly modifying a metakaolin with an acid and a nanomaterial

By adding organic acids, nanomaterials, and silane coupling agents to phosphate-based geopolymers, a continuous gel structure is formed, which solves the problem of slow reaction process of acid-activated geopolymers at room temperature and achieves high strength and excellent mechanical properties of geopolymers.

CN122102653APending Publication Date: 2026-05-29DONGHUA UNIV +1
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGHUA UNIV
Filing Date
2026-01-30
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing acid-activated geopolymers react slowly at room temperature, failing to develop effective strength in time, resulting in poor mechanical properties. Furthermore, alkali-activated geopolymers are prone to shrinkage and cracking.

Method used

A method for modifying metakaolin using a combination of acids and nanomaterials was employed. By adding organic acids, nanomaterials, and silane coupling agents, the synergistic effect slowed down the polycondensation kinetics, forming a continuous gel structure, promoting the uniform distribution of nanoscale pores, improving the microstructure, generating microcrystals, and enhancing the load-bearing capacity.

Benefits of technology

Geopolymers with dense internal structure and uniform gel phase distribution were prepared, exhibiting excellent mechanical properties and meeting the strength requirements under room temperature conditions.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122102653A_ABST
    Figure CN122102653A_ABST
Patent Text Reader

Abstract

This invention discloses a method for preparing geopolymers by jointly modifying metakaolin with acid and nanomaterials, belonging to the field of solid waste resource utilization technology. The method includes the following steps: mixing metakaolin and aluminum dihydrogen phosphate solution uniformly to obtain a phosphate-based geopolymer slurry; then adding organic acid, nanomaterials, and a silane coupling agent; stirring thoroughly; and pouring the mixture into a mold for curing to obtain the geopolymer. Under the synergistic effect of organic acid, nanomaterials, and the silane coupling agent, the polycondensation kinetics can be slowed down, local gel aggregation can be inhibited, and a highly cross-linked and continuous gel structure can be formed, ensuring continuous distribution of the gel phase. Simultaneously, it promotes uniform distribution of nanoscale pores, improves the microstructure, and can induce the formation of microcrystals, utilizing their rigidity to enhance load-bearing capacity. This results in a geopolymer with a dense internal structure, few harmful pores, uniform gel phase distribution, and excellent mechanical properties.
Need to check novelty before this filing date? Find Prior Art