A processing method for anisotropy of round bamboo modified by laser

Abstract

The invention discloses a laser-modified round bamboo anisotropic processing method, which belongs to the field of round bamboo modification. A laser-modified round bamboo anisotropic processing method is to irradiate round bamboo with laser, and the round bamboo absorbs the laser energy and converts it into heat energy, and the lignin in the round bamboo interacts with cellulose, hemicellulose, etc. in three-dimensional space under the action of heat. With the combined effect, the material distribution in the round bamboo changed and the anisotropy decreased. A kind of processing method of laser modified round bamboo anisotropy of the present invention can not only effectively improve the anisotropy of round bamboo, improve the anti-split performance of round bamboo, at the same time, when round bamboo is molded, the round bamboo after modeling The laser treatment of the bent stress-bearing parts can reduce the internal stress of the round bamboo shape and improve the stability of the round bamboo shape. Thermal modification of round bamboo can greatly expand the application field of round bamboo.

Description

technical field [0001] The invention belongs to the field of round bamboo modification, and in particular relates to a laser-modified round bamboo anisotropic processing method. 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 bamboo green, the inner layer is loose bamboo yellow, and the bamboo flesh is between the bamboo green and bamboo yellow, resulting in Heterogeneous structure, different parts and shrinkage differences in different directions, resulting in anisotropy, and its anisotropy is significantly higher than that of wood, making it easier to crack during use, which not o...

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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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