A ternary synergistic calcium silicate board special additive, a preparation method and application thereof
By grafting calcium lignosulfonate onto nanocellulose, a ternary synergistic calcium silicate board additive is formed, which solves the problems of single function of flocculants and lack of reinforcement of nanocellulose in the existing technology, realizes the synergistic effect of flocculation and reinforcement, and improves the mechanical properties and dehydration efficiency of calcium silicate board.
Patent Information
- Application Number
- CN202610580917.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-29
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, anionic polyacrylamide, as a flocculant, has a single function in the preparation of calcium silicate boards and cannot improve mechanical properties. Furthermore, lignin sulfonate, as a water treatment flocculant, has failed to play a multifunctional role in calcium silicate boards, and nanocellulose has failed to effectively enhance the properties.
Using nanocellulose as the backbone, anionic polyacrylamide side chains are covalently grafted, and calcium lignosulfonate is grafted at the end of the side chain. By utilizing the electrostatic coordination of -SO3- and Ca2+ in calcium lignosulfonate, a dynamic ionic cross-linking network is formed, realizing the synergistic triple function of flocculation, nano-reinforcement and calcium ion response.
It achieves synergistic effects of flocculation and reinforcement, shortens dehydration time by 33%-46%, increases the flexural strength of finished boards by 74%, and improves wet blank strength by 3.7 times. The intelligent response of the calcium ion crosslinking network avoids the negative interference of lignin sulfonate.
Smart Images
Figure CN122404718A_ABST