期刊
CELLULOSE
卷 21, 期 1, 页码 641-652出版社
SPRINGER
DOI: 10.1007/s10570-013-0113-2
关键词
Bleaching; Cellulose; Morphology; XPS; XRD; SEM
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Fundacao para a Ciencia e a Tecnologia (FCT), Portugal
Cellulose fibres obtained from sugarcane bagasse were submitted to a purification process, which consisted of an acid hydrolysis for elimination of the major part of lignin and hemicellulose. This was followed by a delignification process carried out in two steps to yield crude cellulose (CCell) fibres in the first one and with a subsequent bleaching in order to yield bleached cellulose fibres (BCell). Composites of crude and bleached cellulose fibres with hydrous niobium phosphate, cell/NbOPO4 center dot nH(2)O, were subsequently synthesized. Scanning electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction characterization of the obtained materials showed CCell/NbOPO4 center dot nH(2)O and BCell/NbOPO4 center dot nH(2)O are real composites. The nature of the cellulose (CCell or BCell) has an important role on the composites obtained, namely on the niobium salt composition at the composite surface. The synthesis of membranes of both cellulose and mixed matrix cellulose/NbOPO4 center dot nH(2)O was only possible when the bleached cellulose was used.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据