Processing method of modifying anisotropism of round bamboo by laser

Abstract

The invention discloses a processing method of modifying anisotropism of a round bamboo by laser and belongs to the field of round bamboo modification. The processing method of modifying anisotropismof the round bamboo by laser comprises the following step: irradiating the round bamboo by laser, wherein the round bamboo absorbs laser energy and converts the laser energy into heat energy, lignin in the round bamboo is crosslinked with cellulose and semicellulose under the action of heat in a three-dimensional space, and substance distribution in the round bamboo changes and the anisotropism isreduced. The processing method of modifying anisotropism of the round bamboo by laser can improve the anisotropism of the round bamboo effectively, so that the anti-split performance of the round bamboo is improved. Meanwhile, when the round bamboo is modeled, the bended stress part of the modeled round bamboo is treated by laser, so that the inner stress of the round bamboo which is modeled canbe reduced, and the round bamboo modeling stability is improved. By thermally modifying the round bamboo, the application field of the round bamboo can be expanded greatly.

Description

Technical field [0001] The invention belongs to the field of round bamboo modification, and specifically relates to a processing method for laser-modified round bamboo anisotropy. Background technique [0002] With the shortage of wood, bamboo, as a natural, environmentally friendly and renewable biomass material, has attracted more and more attention. Bamboo has the advantages of fast growth and strong ecological functions, and its economic, ecological and social benefits are outstanding. Due to the hollow structure and sharpness of the round bamboo, the structure of the round bamboo is uneven. The outer layer is hard-textured bamboo green, the inner layer is loosely organized bamboo yellow, and the bamboo flesh between the bamboo green and the bamboo yellow leads to the round bamboo. Heterogeneous structure, the difference in shrinkage in different parts and directions, produces anisotropy, and its anisotropy is significantly higher than that of wood, which makes it easier to ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the round bamboo is easy to crack which cannot fundamentally be solved in the prior art, the present invention provides a processing method of laser modifying the anisotropy of the round bamboo

By irradiating the round bamboo with laser, the round bamboo absorbs the laser energy and converts it into heat energy. Under the action of heat, the lignin in the round bamboo undergoes three-dimensional cross-linking with cellulose, hemicellulose, etc., the distribution of substances in the round bamboo changes, and the anisotropy decreases. And reduce the internal stress of the round bamboo shape, fundamentally solve the problem that the round bamboo is easy to crack from the internal structure of the round bamboo, and improve the stability of the shape of the round bamboo

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