Author/Authors :
Ng, Law Yong Universiti Kebangsaan Malaysia - Faculty of Engineering and Built Environment - Department of Chemical and Process Engineering, Malaysia , Abdul Mohammad, Wahab Universiti Kebangsaan Malaysia - Faculty of Engineering and Built Environment, Research Centre for Sustainable Process Technology (CESPRO) - Department of Chemical and Process Engineering, Malaysia , Ng, Ching Yin Universiti Kebangsaan Malaysia - Faculty of Engineering and Built Environment - Department of Chemical and Process Engineering, Malaysia , Hairom, Nur Hanis Hayati Universiti Kebangsaan Malaysia - Faculty of Engineering and Built Environment - Department of Chemical and Process Engineering, Malaysia
Abstract :
In this research work, porous PES membranes were initially pre-heated for certain duration of time and then surface-modified to reject the MgSO4 salt solutions through self-adsorption of polyelectrolytes. From the experimental work, higher membrane salt rejection capability can be obtained when the number of polyelectrolyte bilayers is increased. The images of the cross-sectional morphology of modified and non-modified membranes were obtained using field emission scanning electron microscopy (FESEM). All modified membranes showed relatively lower contact angle values.
Keywords :
Polyelectrolytes , adsorption , salt rejection , membrane stability , heat treatment
