Evaluation of polyvinyl alcohol (PVA) loading in the PVA/titanium dioxide (TiO) thin film coating on polyvinylidene fluoride (PVDF) membrane for the removal of textile dyes.

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ID: 107145
2020
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Abstract
Polyvinylidene fluoride (PVDF) membrane was coated with polyvinyl alcohol (PVA)/titanium dioxide (TiO) solution using dip-coating method. The effect of PVA loading (0-12 wt%) at a fixed TiO concentration (1 wt%) was investigated through physical and morphological characterization of the membranes. The experimental results showed that increasing the PVA content from 0 to 12 wt% in the coating solution increased the hydrophilicity and tensile strength as well as the young's modulus of the coated membranes. It also increased the thickness of the thin film coating which enhanced the removal of dyes but affected the permeate flux adversely. Larger the molecular weight of the dye, higher the rejection and lower the permeate flux obtained. The antifouling performance of the membrane was studied using Bovine Serum Albumin (BSA) solution and the fouling was measured using the irreversible fouling factor. The results indicated that the PVA/TiO coated PVDF membrane had lower irreversible fouling factors compared to plain PVDF membrane. The PVDF membrane with a thin film coating containing 3 wt% of PVA and 1 wt% of TiO showed high photocatalytic degradation for the three dyes studied under UV irradiation due to uniform dispersion of TiO nanoparticles over the membrane surface. Further, smaller the molecular weight of the dye, larger the photodegradation that was observed.
Reference Key
sakarkar2020evaluationchemosphere Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Sakarkar, Shruti;Muthukumaran, Shobha;Jegatheesan, Veeriah;
Journal Chemosphere
Year 2020
DOI
S0045-6535(20)31337-0
URL
Keywords
dyes dip coating polyvinyl alcohol (pva) titanium dioxide (tio(2))

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