Chemical modification of lignocellulosic materials by irradiation with Nd-YAG pulsed laser

Most reports about modification of lignocellulosics are mainly based on chemical modifications such as specific reactions on hydroxyl groups of cellulose. In this work, we describe the irradiation of Whatman 5 filter paper, microcrystalline cellulose and organosolv lignin with Nd-YAG laser pulses at...

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Bibliographic Details
Published in:Applied surface science 2001-11, Vol.183 (1), p.120-125
Main Authors: Botaro, V.R., dos Santos, C.G., Arantes Júnior, G., da Costa, A.R.
Format: Article
Language:English
Subjects:
Ablation
Cellulose
Composite
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Laser
Lignin
Materials science
Modification
Molecular weight
Nd-YAG
Neodymium laser
Physics
Pulsed laser
Surface treatments
Surfaces
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Summary:Most reports about modification of lignocellulosics are mainly based on chemical modifications such as specific reactions on hydroxyl groups of cellulose. In this work, we describe the irradiation of Whatman 5 filter paper, microcrystalline cellulose and organosolv lignin with Nd-YAG laser pulses at 1064 nm. The chemical and structural properties of the degraded products were investigated by using FTIR and UV spectroscopies, conductimetrical and SEC analyses. While irradiation affects molar mass and polydispersity of lignin, no detrimental effects caused by Nd-YAG laser treatments were observed for cellulose samples. These results demonstrate that Nd-YAG laser can be used as a practical and selective degradation tool, opening a new field for obtaining surface modified natural fibers.
ISSN:0169-4332
1873-5584
DOI:10.1016/S0169-4332(01)00571-2