Phosphorus-nitrogen synergistic polyethylene glycol basic sign flame-retardant phase change material and preparation method thereof

By introducing phosphorus and nitrogen flame-retardant groups at the ends of polyethylene glycol molecular chains and forming a phosphorus and nitrogen synergistic flame-retardant system using a chemical grafting method, the problems of flammability and long-term stability of organic phase change materials are solved, achieving synergistic optimization of high-efficiency flame retardancy and phase change performance, which is suitable for buildings, automobiles, solar energy and batteries.

CN122587192APending Publication Date: 2026-08-18SHANGHAI JIAOTONG UNIV
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Patent Information

Application Number
CN202610949504.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-29
Publication Date
2026-08-18

AI Technical Summary

Technical Problem

Existing organic phase change materials are highly flammable, and traditional flame retardant methods suffer from flame retardant performance degradation and phase change performance decline during long-term use, making it difficult to meet practical application requirements.

Method used

By introducing phosphorus- and nitrogen-containing flame-retardant groups at the ends of polyethylene glycol molecular chains, and using a chemical grafting method to attach DOPO and aromatic primary amines to the PEG molecular chains, a phosphorus-nitrogen synergistic flame-retardant system is formed, and flame-retardant performance becomes an intrinsic property of the material.

Benefits of technology

It achieves high-efficiency flame retardant performance and long-term stability of polyethylene glycol phase change material, forming a dense char layer after combustion, which significantly improves flame retardant efficiency, while retaining the phase change characteristics of phase change material, making it suitable for fields such as construction, automobiles, solar energy and batteries.

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Abstract

The application discloses a phosphorus-nitrogen synergistic polyethylene glycol intrinsic flame-retardant phase change material and a preparation method thereof, relates to the technical field of phase change energy storage materials, and the material is prepared by taking polyethylene glycol long-chain aldehyde as a phase change skeleton, condensing with aromatic primary amine to obtain a Schiff base intermediate, and adding a phosphorus-containing compound to introduce a phosphorus-nitrogen flame-retardant group, so that the material has both phase change energy storage and intrinsic flame-retardant properties. Through molecular structure design, the application retains good phase change characteristics, and at the same time, excellent intrinsic flame-retardant properties are endowed to the material, so that the problem of flammability of traditional organic phase change materials is effectively improved.
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