Sound insulation bamboo powder magnesium oxysulfate composite material and preparation method thereof

By introducing alkali-treated bamboo powder and rubber powder into magnesium oxysulfate cement, a mechanically interlocked and multi-scale sound wave dissipation structure is formed, which solves the problems of high density and poor toughness of traditional sound insulation materials, and improves the sound insulation performance and mechanical properties, while also having environmental advantages.

CN122355677APending Publication Date: 2026-07-10GUANGZHOU UNIVERSITY +1
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Patent Information

Application Number
CN202610194162.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-11
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Traditional sound insulation materials have high density, poor toughness, are inconvenient to construct, and lack environmental performance. Magnesium oxysulfate cement has weak sound insulation performance and cannot meet the modern building's demand for lightweight, efficient, and green building materials.

Method used

By introducing bamboo powder with a high aspect ratio and rubber powder, the active hydroxyl groups of the bamboo powder are enhanced and the surface roughening is achieved through alkali treatment. Combined with the high damping elasticity of the rubber powder, a mechanically interlocked and multi-scale sound wave dissipation structure is formed to prepare a sound-insulating bamboo powder sulfur-oxygen magnesium composite material.

Benefits of technology

It improves the sound insulation and mechanical properties of the material, while realizing the efficient resource utilization of waste bamboo powder and waste tire rubber, which has environmental advantages and is suitable for the sustainable development of green building materials.

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Abstract

The invention discloses a sound insulation bamboo powder magnesium oxysulfate cement composite material and a preparation method thereof, and belongs to the technical field of building materials. The composite material takes magnesium oxysulfate cement as a matrix, and alkali-treated bamboo powder and rubber powder are doped as functional components. The bamboo powder is subjected to alkali treatment, so that more active hydroxyl groups are exposed on the surface of the bamboo powder, the chemical binding force between the bamboo powder and a cement matrix is enhanced, the interfacial compatibility is improved, the surface of the bamboo powder is roughened, then the bamboo powder and the rubber powder form a mechanical interlocking structure, and uniform dispersion and synergistic effect of the bamboo powder and the rubber powder in cement are promoted. On the basis of improving the mechanical property of the composite material, a multi-scale sound wave dissipation system is constructed by utilizing the porous sound wave absorption characteristic of the alkali-treated bamboo powder and the viscoelastic damping effect of the rubber powder, so that sound insulation performance optimization of the material in a full-frequency band range is realized.
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