PREPARATION AND CHARACTERIZATION OF MEMBRANES

BASED PVA USED IN PERVAPORATION

 

A. Regragui1, 2*, N. Merzouk2, N. Chekhi1, A. Essamri1

1Laboratory of Agricultural Resources and Process Engineering, University Ibn Tofail, Faculty of Science, Department of Chemistry, Kenitra - Morocco

2 Department of Prosthodontics Removable. Mohamed V University, Faculty of Dentistry Rabat - Morocco

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

Received: 19 July 2014; revised version accepted: 03 December 2014

 

Abstract

     The effectiveness of membrane processes depends largely on the performance of the mistress of the transaction which is the membrane part. In this work, we tried to make efficient membranes to separate water-ethanol mixtures by pervaporation. At first, films based on polyvinyl alcohol (PVA) and polyacrylic acid (PAA) were prepared with different concentrations of PAA. We then characterized the films using the technique of infrared spectroscopy and extent of swelling of these membranes in water / ethanol mixtures. Moreover, pervaporation tests were performed to measure the flux and the selectivity of these films vis-à-vis the water / ethanol mixture. It is clear that the addition of polyacrylic acid improves the hydrophilic nature of these films and their crystallinity lowers leading to more efficient membranes that the base material by increasing the flow and selectivity. We can therefore conclude that the technique alloy is a simple and effective method for preparing membranes capable of dehydration of water-ethanol mixture by pervaporation.

 

Keywords: Pervaporation; Characterization; Membranes; Swelling; Infrared; Physico-chemical properties.

 


 

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