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  • A carbon nanotube-infused polysulfone membrane with polyvinyl alcohol layer for treating oil-containing waste water.

A carbon nanotube-infused polysulfone membrane with polyvinyl alcohol layer for treating oil-containing waste water.

Scientific reports (2013-03-23)
Selby Maphutha, Kapil Moothi, M Meyyappan, Sunny E Iyuke
ABSTRACT

A carbon nanotube (CNT) integrated polymer composite membrane with a polyvinyl alcohol barrier layer has been prepared to separate oil from water for treatment of oil-containing waste water. The CNTs were synthesised using chemical vapour deposition, and a phase inversion method was employed for the blending of the CNTs in the polymer composite solution for casting of the membrane. Relative to the baseline polymer, an increase of 119% in the tensile strength, 77% in the Young's modulus and 258% in the toughness is seen for a concentration of 7.5% CNTs in the polymer composite. The permeate through the membrane shows oil concentrations below the acceptable 10 mg/L limit with an excellent throughput and oil rejection of over 95%.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Poly(vinyl alcohol), average Mw 85,000-124,000, 87-89% hydrolyzed
Sigma-Aldrich
Poly(vinyl alcohol), average Mw 146,000-186,000, 87-89% hydrolyzed
Sigma-Aldrich
Poly(vinyl alcohol), Mw 85,000-124,000, 99+% hydrolyzed
Sigma-Aldrich
Poly(vinyl alcohol), Mw 31,000-50,000, 98-99% hydrolyzed
Sigma-Aldrich
Poly(vinyl alcohol), Mw 13,000-23,000, 87-89% hydrolyzed
Sigma-Aldrich
Poly(vinyl alcohol), Mw 89,000-98,000, 99+% hydrolyzed
Sigma-Aldrich
Poly(vinyl alcohol), average Mw 13,000-23,000, 98% hydrolyzed
Sigma-Aldrich
Mowiol® 10-98, Mw ~61,000
Sigma-Aldrich
Poly(vinyl alcohol), Mw 9,000-10,000, 80% hydrolyzed
Sigma-Aldrich
Poly(vinyl alcohol), average Mw 31,000-50,000, 87-89% hydrolyzed
Sigma-Aldrich
Poly(vinyl alcohol), Mw 146,000-186,000, 99+% hydrolyzed
Sigma-Aldrich
Mowiol® 8-88, Mw ~67,000
Sigma-Aldrich
Mowiol® 4-98, Mw ~27,000
Sigma-Aldrich
Poly(vinyl alcohol), average Mw 130,000, 99+% hydrolyzed
Sigma-Aldrich
Mowiol® 4-88, Mw ~31,000
Sigma-Aldrich
Poly(vinyl alcohol), Fully hydrolyzed
Sigma-Aldrich
Poly(vinyl alcohol), 87-90% hydrolyzed, average mol wt 30,000-70,000
Sigma-Aldrich
Poly(vinyl alcohol), SAJ first grade, degree of polymerization 500
Sigma-Aldrich
Mowiol® 6-98, Mw ~47,000
Sigma-Aldrich
Mowiol® 20-98, Mw ~125,000
Sigma-Aldrich
Polysulfone, average Mw ~35,000 by LS, average Mn ~16,000 by MO, pellets (Transparent)
Sigma-Aldrich
Kuraray Poval ®56-98, Mw ~195,000
Sigma-Aldrich
Polysulfone, average Mn ~22,000 by MO, beads
Sigma-Aldrich
Mowiol® 28-99, Mw ~145,000
Sigma-Aldrich
Mowiol® 18-88, Mw ~130,000
Sigma-Aldrich
Mowiol® 40-88, average Mw ~205,000 g/mol