Large-size bamboo composite engineering material as well as preparation method and application thereof

By setting end-reconstituted bamboo units and a buffer layer on the outermost layer of bamboo under tension, the problem of low longitudinal interface strength of bamboo is solved, achieving high strength and lightweight of large-size bamboo composite materials, and improving bending performance and structural stability.

CN122253299APending Publication Date: 2026-06-23INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY +1
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Patent Information

Application Number
CN202610708142.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-21
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In the process of longitudinally splicing bamboo, the joint strength of the existing technology is lower than that of the bamboo itself, resulting in substandard bending performance. At the same time, the excessive thinning or reorganization process destroys the fiber continuity and lightweight characteristics of the original bamboo, making it difficult to meet the requirements of high-standard building structures.

Method used

The method involves setting end-reconstructed bamboo units in the outermost tensile layer. After the ends of the bamboo units are reconstructed by resolving them, they are impregnated with adhesive and then interlocked to form a high-density fiber structure. A buffer layer and a comb-like finger joint structure are used in the main body to form a high-strength composite material.

Benefits of technology

It significantly improves the bending strength of large-size bamboo composite materials, balancing the needs of lightweight and high strength, avoiding increased density and stress concentration, and improving the structural stability and reliability of the material.

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Abstract

The invention relates to the technical field of composite materials and engineering materials, in particular to a large-size bamboo composite engineering material and a preparation method and application thereof. The main body part is formed by laterally gluing and / or longitudinally lengthening a plurality of bamboo composite units; the reinforcing layer is arranged at the bottom of the main body part; the reinforcing layer is composed of at least one end defibered and recombined bamboo unit; each end defibered and recombined bamboo unit is formed by longitudinally splicing a plurality of bamboo chip units, and the two ends of each bamboo chip unit are provided with defibered and recombined connectors. The mode that the ends are locally defibered and recombined is adopted, infinite lengthening of the bamboo units is achieved, the problems that due to complete defibering, the density of materials is too large, and the weight of the materials is too large are solved, the characteristics of light weight and high strength of the materials are guaranteed, and balance of mechanical performance and practicability is considered.
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