Lightweight high-strength expandable polystyrene material and preparation method thereof

By preparing a modified graphene and silica composite filler, the problems of brittleness and flammability of polystyrene materials were solved, achieving simultaneous optimization of lightweight, high strength and flame retardancy, making it suitable for high-end applications.

CN121554887APending Publication Date: 2026-02-24LIAONING LITIAN NEW MATERIAL CO LTD
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Patent Information

Application Number
CN202610078176.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-21
Publication Date
2026-02-24

AI Technical Summary

Technical Problem

Traditional polystyrene materials are difficult to apply in high-end fields due to their brittleness, flammability, and insufficient mechanical properties. Existing modification methods are difficult to achieve a balance of comprehensive performance, and the uneven cell structure during the foaming process affects the material density and mechanical properties.

Method used

A composite filler was prepared by mixing modified graphene and modified silica. By modifying graphene with maleic anhydride copolymer sulfonate and silica with polydopamine/carboxymethyl cellulose, a strong interfacial bond and multi-component synergistic effect were formed, which improved mechanical properties, thermal stability and flame retardancy, and improved filler dispersibility and cell structure.

Benefits of technology

It achieves lightweight and high-strength polystyrene materials with uniform cell structure, significantly improved mechanical and flame-retardant properties, and is suitable for building insulation and other fields in high-temperature environments.

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a lightweight high-strength expandable polystyrene material and a preparation method thereof. The high-temperature-resistant foaming material is prepared from the following components in parts by weight: 90 to 100 parts of styrene, 200 to 250 parts of deionized water, 0.3 to 0.6 part of a dispersing agent, 1.5 to 2.5 parts of a nucleating agent, 0.2 to 0.6 part of an initiator, 0.2 to 0.5 part of a particle size regulator, 4 to 7 parts of a foaming agent and 3 to 6 parts of composite filler, the composite filler is prepared by mixing modified graphene and modified silicon dioxide; the modified graphene is maleic anhydride copolymer sulfonate modified graphene, and the modified silicon dioxide is polydopamine / carboxymethyl cellulose modified silicon dioxide; the water dispersibility and interfacial compatibility of the composite filler are remarkably improved in a physical and chemical grafting manner, and the mechanical property, thermal stability and flame retardance of the polystyrene material are synchronously optimized by utilizing a multi-component synergistic effect.
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