Characterization on Performance, Morphologies and Molecular Properties of Dual-Surfactants Based Polyvinylidene Fluoride Ultrafiltration Membranes

Abstract

This paper addressed the pioneering work on the effects of dual surfactants component on the performance, morphologies and molecular properties of polyvinylidene fluoride/polyether glycol (PVDF/PEG 200) ultrafiltration (UF) membranes. The PVDF surfactant membranes were prepared via dry/wet via phase inversion technique with the addition of sodium dodecyl sulfate (SDS)/Tween 80 and Triton X-100/Tween 80 into polymer solution. Experimental data revealed that the dual surfactants improved the membrane performance up to 120.84 L/m2 × h and 82 % of permeate flux and rejection of bovine serum albumin, respectively. In addition, 2 wt% of dual surfactants alsofound to induce the growth of fine finger-like and macro-voids cavities inside the membranes while the FTIR spectra proved that the existence of dual surfactants in PVDF membranes produced better molecular alignment which contributed significantly towards better flux and good rejection. In conclusion, the used of dual surfactants in the PVDF ultrafiltration membranes improved the performance-properties of the membranes and extending the possibly versatile for the membrane to be used for more applications.

Tailoring of Narrow Pores, Pore Size Distribution and Structural Details in Asymmetric Nanofiltration Membranes via Polyvinyl-pyrrolidone Additive

“…A low molecular weight component is frequently utilised as an additive in membrane formation systems. This kind of additive can manage the structure of the membrane using a practical technique of creating high-performance membranes [21][22][23].…”

Assessment on Performance-properties of Asymmetric Nanofiltration Membranes from Polyethersulfone/n-Methyl-2-pyrrolidone/water Blends with Poly(vinyl pyrrolidone) as Additive

“…1. polymeric additives such as PVP [12][13][14][15] and polyethylene glycol (PEG) [16][17][18]; 2. low molecular weight chemicals, including salts such as lithium chloride (LiCl) [19][20][21] and lithium perchlorate (LiClO 4 ) [22], inorganic acids (acetic acid, phosphoric acid) [23] and organic acids (propionic acids [24]; 3. weak non-solvents such as glycerol [25], and strong non-solvent, water, as an additives in a tiny amount [26]. Nevertheless, the roles of different additives vary in different polymer /solvent/non-solvent systems.…”

Preface

“…Polyvinylidene fluoride/polyether glycol ultrafiltration membranes are also subjects of surface modification with surfactants. Using dual surfactants in the PVDF membranes improved the performance properties (flux and retention [3]) similarly to that of polysulfone membranes [1].…”