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

被引：16

作者：

Botaro, VR

dos Santos, CG

Arantes, G

da Costa, AR

机构：

[1] Univ Fed Ouro Preto, ICEB, Dept Quim, BR-35400000 Ouro Preto, MG, Brazil

[2] Univ Fed Ouro Preto, ICEB, Dept Engn Met & Mat, BR-35400000 Ouro Preto, MG, Brazil

来源：

APPLIED SURFACE SCIENCE | 2001年 / 183卷 / 1-2期

关键词：

laser; modification; surfaces; lignin cellulose; Nd-YAG; neodymium laser; pulsed laser; ablation; molecular weight; composite;

D O I：

10.1016/S0169-4332(01)00571-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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. (C) 2001 Published by Elsevier Science B.V.

引用

页码：120 / 125

页数：6

共 7 条

[1] Chemical modification of the surface of cellulosic fibres. 2. Introduction of alkenyl moieties via condensation reactions involving isocyanate functions [J].