Preparation of Bromodeoxycellulose and Derivatives from Shambat Cotton Lint Using Dimethyl Acetamide / Lithium Bromide Solvent System

  • Inaam A. M. Salim 1Department of Chemistry, Faculty of Science, University of Kordofan, El Obeid, Sudan.
  • Yousif A. Ragab Department of Applied Chemistry & Chemical Technology, Facult of Engineering & Technology, University of Gezira, Wad Medani, Sudan


This study was designed to prepare cellulose derivatives  with

different   functional  groups  from  Sudanese  Shambat  cotton lint

using   a homogenous   solubilisation  medium. The raw cotton lint

was   mercerized    in   (15%)   NaOH     solution   to   weaken   the

aggregation   of    the   bundles   of   cellulose    fibers;    and    was

subsequently      dissolved      in     N,N-dimethylacetamide/lithium

bromide    (DMA/LiBr)    as    a homogenous      solvent     system.

Bromodeoxycellulose   was    synthesized   by   treatment,   of   the



solubilised   cotton  cellulose with N-bromosuccinimide (NBS)  in

the    presence   of   triphenylphosphine   (Ph3P)   to   convert   the

hydroxyl  groups  into  the  bromodeoxy  derivative  of   cellulose.

The  chemical   structure  this  derivative  was  investigated  using

infrared  spectroscopy,  elemental  analysis  which  confirmed  the

presence  of  C-Br   bonds.  Thermal   analysis   (TGA,  DSC)  has

shown     that    unlike   chlorordeoxycellulose    and    unmodified

mercerized  cotton, bromodeoxycellulose was relatively thermally

stable.  Azido  and  amino  deoxycellulose  were   easily  prepared

from   bromodeoxycellulose   since   bromide   is  a good  leaving.

Solubility in some organic solvents was tested to explore possible

new uses and applications.


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How to Cite
A. M. SALIM, Inaam; A. RAGAB, Yousif. Preparation of Bromodeoxycellulose and Derivatives from Shambat Cotton Lint Using Dimethyl Acetamide / Lithium Bromide Solvent System. Gezira Journal of Engineering and Applied Sciences, [S.l.], v. 8, n. 2, p. 57 - 84, nov. 2013. ISSN 1858-5698. Available at: <>. Date accessed: 27 oct. 2021.