Open AccessPreparation of Polypropylene/PVDF Composite Membrane by Dip-Coating Method
Author(s) -
P.T.P. Aryanti,
G. Trilaksono,
A. Hotmaida,
M. A. Afifah,
Febrina Pratiwi,
N. Udini,
Febrianto Adi Nugroho
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1115/1/012028
Subject(s) - membrane , materials science , polyvinylidene fluoride , contact angle , acetone , porosity , permeation , dip coating , coating , filtration (mathematics) , solvent , polypropylene , chemical engineering , composite material , swelling , tetrahydrofuran , fiber , composite number , dichloromethane , polymer chemistry , chemistry , polymer , organic chemistry , biochemistry , mathematics , engineering , statistics
In this research, a composite membrane was prepared by dipping a hollow fiber polypropylene (PP) membrane in a polyvinylidene fluoride (PVDF) solution. A small concentration of volatile solvent (acetone and tetrahydrofuran/THF) was added to the PVDF solution to form a tight structure in the membrane surface. The influence of PVDF concentration, type of volatile solvents (acetone and THF), and the dip-coating cycle on membrane characteristics, including porosity, swelling degree, and contact angle, were investigated. The flux and rejection of the membranes were also investigated during the filtration of hexane/oil solution. The experimental results showed that low membrane porosity (3%), low swelling degree (0.1%), and high water contact angle (140°) were obtained when 8%wt PVDF was blended with 10%wt acetone and then coated on PP hollow fiber membrane surface with 3 (three) dip-coating cycles. The oil rejection was 68% after 45 minutes of filtration time with a permeate flux of 20 L.m −2 .h −1 . Higher membrane porosity and permeate flux can be obtained by reducing the dip-coating cycle; however, a lower oil rejection was achieved.