Research Papers by Kueir-Rarn Lee

Polydimethylsiloxane composite membrane was employed for the separation of phenol and sodium chloride in synthetic wastewater. The major operational parameters affecting phenol transfer through this composite membrane were screened by the orthogonal array and range analysis. The results showed that

The gas transport properties of Polyimide membranes were examined as a function of physical aging time. A clear decrease of the gas permeability coefficient was observed. Interpretation of the permeation properties using results from differential scanning calorimeter and dynamic mechanical analyzer

Short- and long-term physical aging tests of high molecular weight poly(methyl methacrylate) (PMMA) membranes have been performed at different temperature. The effects of physical aging on the gas permeation properties are studied. Experimental data show that the physical aging decreases the volume

Ethanol/water mixture is separated by pervaporation through a polysulfone (PSf) membrane filled with zeolite. The coupling agent effect of 3-aminopropyltrimethoxysilane (APTMS) on the preparation of PSf/zeolite membrane was also studied. APTMS enhanced the contact of zeolite particles with PSf chain

The pervaporation performances of a series of functionalized syndiotactic poly(styrene-co-4-methylstyrene) (SPSM) membranes for various alcohol mixtures were investigated. The effect of functionalization on the thermal properties and polymer structure of the SPSM membranes were also investigated. Th

In this article, three types of aromatic polyamides were prepared by the direct polycondensation of bis[4-(4aminophenoxy) phenyl] diphenyl methane (BAPDM) with various of aromatic diacids such as terephthalic acid (TPAc), 5-tert-butylisophthalic acid (TBPAc), and 4,4N-hexafluoroisopropylidenedibenzo

In this work, a series of fluorine-containing aromatic polyamide membranes were prepared by direct polycondensation of 4,4′-hexafluoroisopropylidene-dibenzoic acid with various aromatic diamines, and the associated gas transport and sorption properties were investigated. The properties of the prepar