Optimization of the experimental conditions

for the extraction of Cellulose starting

from the “Stipa tenacissima” of Eastern Morocco


S. El Barkany1*, A. El Idrissi1, S. Ouslimane1, H. Amhamdi2

1 Faculté des Sciences, Université Mohamed Ier, 60000 Oujda, Maroc.

2 Faculté Pluridisciplinaire de Nador, B.P. 350, 62700, Selouane, Nador, Maroc

* Corresponding author E-mail: el_barkany@yahoo.fr

Received: 04 July 2007; revised version accepted: 26 May 2008



     In this work, we examined the isolation of cellulose starting from “Stipa-tenacissima” of Eastern Morocco by two different ways; initially in an acetic acid solution catalyzed by the nitric acid of which the goal is of determination of the optimal catalytic quantity of catalyst. The second way consists in studying the extractability of cellulose according to the molarity of an alkaline solution. The cellulose is characterized by FTIR spectroscopy while the morphology of fibers is seen by a spectrographic microscope of Leitz CY. The best outputs are obtained for 2 % (in volume) of HNO3 and 1.0 M aqueous NaOH solution. The pure cellulose is that obtained in basic medium because of absence of acetylation of cellulose met during extraction in acid medium.


Keywords: Isolation; Cellulose; Degradation; Stipa-tenacissima; Eastern Morocco.

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