PVDF mixed matrix nano-filtration membranes integrated with 1D-PANI/TiO sub(2) NFs for oil-water emulsion separation

The treatment of directly discharged oily waste water is difficult because of colloidal stability and the deformable nature of emulsified oil. In this work, one dimensional (1D) PANI/TiO sub(2) nanofibers (NFs) were incorporated into polyvinylidene fluoride (PVDF) Mixed Matrix Membranes (MMMs) for t...

Full description

Saved in:
Bibliographic Details
Published in:RSC advances 2016-02, Vol.6 (23), p.18899-18908
Main Authors: Venkatesh, K, Arthanareeswaran, G, Bose, AChandra
Format: Article
Language:English
Subjects:
Droplets
Flux
Membranes
Polyvinylidene fluorides
Rejection
Titanium dioxide
Transmission electron microscopy
Wastewater treatment
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The treatment of directly discharged oily waste water is difficult because of colloidal stability and the deformable nature of emulsified oil. In this work, one dimensional (1D) PANI/TiO sub(2) nanofibers (NFs) were incorporated into polyvinylidene fluoride (PVDF) Mixed Matrix Membranes (MMMs) for the removal of oil and water droplets from oily waste water. The size of the 1D PANI/TiO sub(2) (polyaniline/titanium dioxide) NFs ranged between 60 to 75 nm, as identified using transmission electron microscopy (TEM). Atomic force microscopy (AFM) analysis also revealed the significant decrease in the surface roughness of the membranes from 186 to 36 nm following the addition of 1D PANI/TiO sub(2) NFs. Due to the hydrophilic property of the 1D PANI/TiO sub(2) NFs, the contact angle, pure water flux and antifouling properties were increased for 1D PANI/TiO sub(2) NF MMMs compared to the neat PVDF membrane. The pure water flux increased from 80 to 132 L m super(-2) h super(-1), which clearly indicates the impact of addition of the 1D PANI/TiO sub(2) NFs. Among the MMMs, PT-4 exhibited the maximum oil rejection of 99% at a 5 bar operating pressure. Hence, the incorporation of PANI/TiO sub(2) NFs in MMMs is proposed to enhance the oil rejection and fouling resistance of MMMs.
ISSN:2046-2069
DOI:10.1039/c5ra27022g