Highly flame retardant wood frame, shaped composite phase change material and preparation method thereof
By synergistically treating wood with P-DES impregnation and thermal modification, covalent bonds and a dense carbon layer are formed, which are then loaded with phase change materials. This solves the problems of single flame retardant mechanism, destruction of pore structure and insufficient durability in existing technologies, and achieves synergy between high-efficiency flame retardancy and energy storage, making it suitable for building materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- KUNMING UNIV OF SCI & TECH
- Filing Date
- 2026-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing DES-modified wood technology suffers from problems such as a single flame retardant mechanism, damage to pore structure, insufficient durability, and limited functionality, making it difficult to achieve synergy between efficient flame retardancy and energy storage. Furthermore, traditional flame retardants present environmental issues.
Wood was impregnated and thermally modified using phosphorylcholine chloride eutectic solvent (P-DES). Covalent bonds were formed by the reaction of phosphoric acid with cellulose hydroxyl groups, which promoted lignin rearrangement and the formation of a dense carbon layer, achieving dual flame retardancy in both the condensed phase and gas phase. Shaped composite phase change materials were prepared by loading polyethylene glycol and graphene oxide.
It achieves a synergistic effect of high flame retardancy and high energy storage performance, improves the flame retardancy efficiency of the material, retains porosity, and the modification process is green and pollution-free, making it suitable for the field of building materials.
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