A nano flame retardant NCNT@M, flame retardant epoxy resin

By using the nano flame retardant NCNT@M in epoxy resin in synergy with ammonium polyphosphate, the flammability problem of epoxy resin was solved, achieving high-efficiency flame retardancy and improved mechanical properties.

CN116836456BActive Publication Date: 2026-07-17NANJING TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING TECH UNIV
Filing Date
2023-08-11
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing epoxy resin materials are flammable, releasing high heat, producing a large number of molten droplets and toxic fumes when burning, and existing flame retardants have limited flame retardant effects without reducing mechanical properties.

Method used

The nano flame retardant NCNT@M is used to form a synergistic flame retardant system by encapsulating transition metal elements and ammonium polyphosphate in nitrogen-doped bamboo-shaped carbon nanotubes. This reduces the heat release rate and the generation of toxic fumes, and enhances mechanical properties.

Benefits of technology

It significantly reduces the heat release rate and toxic smoke generation rate of epoxy resin, improves mechanical properties, and has a higher flame retardant efficiency than existing technologies.

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Abstract

This invention belongs to the field of flame retardant technology, specifically disclosing a nano flame retardant NCNT@M and a flame-retardant epoxy resin. The nano flame retardant NCNT@M provided by this invention is specifically a nitrogen-doped bamboo-shaped carbon nanotube encapsulated with a transition metal element. M represents one or two of Ni, Co, Fe, and Sn. When added together with ammonium polyphosphate to epoxy resin (EP), it can exert a synergistic flame-retardant effect. The synergistic effect of the nano flame retardant NCNT@M and ammonium polyphosphate effectively reduces the heat release rate, total heat release, and the generation rate and yield of toxic fumes in EP, while simultaneously enhancing the mechanical properties of EP.
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