Open AccessPreparation of cross linked PVA with MA,EDTA,and a mixture of MA/EDTA for water uptake membranes at different pH
Author(s) -
Dhefaf H. Badri,
Nada M.Al-Nakib,
Zakaria H. Aiube,
Jawad K.Al Kafaji
Publication year - 2021
Publication title -
mağallaẗ al-buḥūṯ wa-al-dirāsāt al-nafṭiyyaẗ
Language(s) - English
Resource type - Journals
eISSN - 2710-1096
pISSN - 2220-5381
DOI - 10.52716/jprs.v2i2.40
Subject(s) - membrane , elongation , chemistry , swelling , ultimate tensile strength , fourier transform infrared spectroscopy , nuclear chemistry , molar concentration , molar ratio , analytical chemistry (journal) , chromatography , materials science , chemical engineering , organic chemistry , biochemistry , composite material , engineering , catalysis
Poly (viny1 alcohol) (PVA) of 72000 g mol -1 molar mass was cross linked through cold cast esterification with different mol % of MA and EDTA (10 % , 20 % and 30 % ), and two different mol % mixture of MA l EDTA (20 %/5% and 20%/10% .Molecular structures of the produced membranes were identified by FTIR spectral analysis .Mechanical measurements showed that, PVA cross linked with 30 mol% EDTA gave higher tensile strength value, while PVA cross linked with 30mol% MA gave higher elongation value at break.Water swollen of the membranes was studied at ambient conditions and different pH solutions (4, 5, 6, and7) .Water swollen of the membranes was studied at ambient conditions and different pH solutions (4, 5, 6, and7) .Maximum swelling percent (Sw%) value at equilibrium was at pH7 for all membranes and this value decreases as pH was decreased.Relation between maximum Sw% and the cross link density (c) was obtained mathematically to prove that the decrease in Sw% is due to the increase in c.