Biblioteca Digital do Instituto Politécnico de Bragança   Instituto Politécnico de Bragança

Biblioteca Digital do IPB >
Escola Superior de Tecnologia e Gestão >
Tecnologia Química e Biológica >
DTQB - Artigos em Proceedings Não Indexados ao ISI >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/3864

Título: FTIR and NMR studies on lignin acetylation
Autor: Cateto, C.A.
Barreiro, M.F.
Rodrigues, A.E.
Brochier-Salon, M.C.
Thielemans, W.
Belgacem, M.N.
Palavras-chave: Lignin
Acetylation
FTIR
NMR
Issue Date: 2006
Citação: Cateto, C.A.; Barreiro, M.F.; Rodrigues, A.E.; Brochier-Salon, M.C.; Thielemans, W.; Belgacem, M.N. (2006) - FTIR and NMR studies on lignin acetylation . In 9th European Workshop on Lignocellulosics and Pulp - EWLP. Vienna, Austria.
Resumo: In this work, a comparative study of an acetylation procedure, using four different lignin samples was performed. The chosen lignin samples, Indulin AT (Meadwestvaco), Alcell (Repap), Curan 27-11P (Borregaard LignoTech) and Sarkanda (Granit SA), represent both the guaiacyl and guaiacyl-syringyl type, and were obtained from different pulp processes (kraft and organosolv). Lignin was acetylated using an acetic anhydride-pyridine mixture and the final sample was recovered by precipitation. Final samples, with different reaction times (1 and 2 hours), were characterized by FTIR and 13C NMR analysis, and the obtained spectra were compared with the corresponding ones for non-acetylated samples. Within the used experimental conditions and samples, an incomplete acetylation yield appeared to be common. Total hydroxyl content, determined independently by titration and based on the 13C NMR results, was found to be in close agreement.
Arbitragem científica: yes
URI: http://hdl.handle.net/10198/3864
Appears in Collections:DTQB - Artigos em Proceedings Não Indexados ao ISI

Files in This Item:

File Description SizeFormat
EWLP (Vienna, 2006).pdf2,62 MBAdobe PDFView/Open
Restrict Access. You can request a copy!
EWLP (Vienna, 2006).pdf98,61 kBAdobe PDFView/Open

Statistics
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 


  © Instituto Politécnico de Bragança - Biblioteca Digital - Feedback - Statistics
  Estamos no RCAAP Governo Português separator Ministério da Educação e Ciência   Fundação para a Ciência e a Tecnologia

Financiado por:

POS_C UE