In this section
@inproceedings{Baptista:2008,
author = {Baptista, IR and See, Toh YH and Sereewatthanawut, I and Lim, FW and Livingston, AG},
title = {Polymeric nanofiltration membranes with engineered molecular weight cutoff for molecular separations in aggressive solvents},
year = {2008}
}
TY - CPAPER
AB - In recent years, there has been a growing interest in the application of Organic Solvent Nanofiltration (OSN) to many areas including the fine chemical, pharmaceutical and petrochemical industries. OSN applications include the purification and fractionation of natural products, homogeneous catalyst recovery, colour removal from pharmaceutical products, and monomer separation from oligomers. Although there is no shortage of polymeric materials for membrane fabrication, current challenges facing the further industrial application of OSN include: i) the lack of commercially viable membranes which are stable in a broad range of organic solvents including polar aprotic solvents, and ii) the ability to control the permeation pathways to give tunable molecular weight cutoff (MWCO) profiles in the molecular weight range 200 - 1000 g mol-1. This paper will describe a range of new membranes prepared by phase inversion which meet these challenges, and have been scaled up as far as small spiral wound elements capable of performing OSN in DMF and other aggressive solvents. Available OSN membranes fall into two types (i) composites made from polydemethylsiloxane films on polyacrylonitrile supports, or integrally skinned asymmetric membranes made from polyimides (PI). PIs offer several attractive mechanical and physicochemical properties, including high glass transition temperatures, good thermal stability and chemical stability in many solvents and weak acids. Commercial PI OSN membranes have been shown to give good performances in several organic solvents (toluene, methanol and ethyl acetate), but have generally poor stability and performance in polar aprotic solvents such as dichloromethane (DCM), tetrahydrofuran (THF), dimethyl formamide (DMF) and n-methyl pyrrolidone (NMP), in which most of these membranes are soluble. Inorganic membranes have been developed which offer good stability in organic solvents, but they are often more expensive and difficult to handle. To date, the
AU - Baptista,IR
AU - See,Toh YH
AU - Sereewatthanawut,I
AU - Lim,FW
AU - Livingston,AG
PY - 2008///
TI - Polymeric nanofiltration membranes with engineered molecular weight cutoff for molecular separations in aggressive solvents
ER -