Physicochemical and transport parameters for a lipid coated regenerated cellulose membrane

Physicochemical and NaCl characteristic transport parameters determined for a lipid coated regenerated cellulose membrane are reported. The lipid studied consists of glyceryl triestearate, while l-α-phosphatidylcholine and sodium taurocholate were used as surfactants. The RC-support and the lipid-modified membrane were characterized by X-ray photoelectron spectroscopy (XPS) at three different take off angles and X-ray diffraction. Transport parameters (salt diffusion and electrical resistance) were determined from salt permeation and impedance spectroscopy measurements performed with the membranes in contact with a NaCl constant concentration (Cc = 0.01 M). These results show a reduction in the transport parameters across the lipid coated membrane due to the lipid presence as well as its stability under mass and ion fluxes, which supports its application in liquid systems.

► Hydrophilic RC membrane surface was modified by lipid coating. ► Angle resolution XPS was used to confirm the lipid coating. ► Reduction in electrical resistance and diffusion support lipid presence. ► Stability for osmotic pressure up to 25 kPa was also established.