Comparative study of sorption and permeation techniques for the determination of heptane and toluene transport in polyethylene membranes

Ethanol sorption and permeation in fluoropolymer gel membrane containing 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquid

“…Ethanol vapor sorption experiments were performed at three temperatures, namely 25 C, 35 C, and 45 C using an in-house made sorption apparatus instrumented with a calibrated McBain quartz spiral balance and with an automatic CCD camera (Sony) system for the detection of sample-target-point position [23]. A sample of the characterized membrane (0.21697 g of the ionic liquid membrane and 0.04340 g of the neat p(VDF-HFP) membrane) was attached to the end of the quartz spiral balance, which was calibrated using a set of mass standards prior to the measurement.…”

“…A sample of the characterized membrane (0.21697 g of the ionic liquid membrane and 0.04340 g of the neat p(VDF-HFP) membrane) was attached to the end of the quartz spiral balance, which was calibrated using a set of mass standards prior to the measurement. The experimental method, setup and procedure for the measurement of vapor sorption were described in our previous works [23,24]. The entire apparatus was placed in a closed box, in which the temperature was maintained by an air thermostat.…”

Comparison of Hexane Vapour Permeation in Two Different Polymeric Membranes via an Innovative In-line FID Detection Method

“…An organic vapour flux can be determined for a specific membrane by various experimental methods, for example, using a constant pressure/variable volume technique under a steady state 6,7 , fixed-volume pressure increase instrument 8 , analysis via a thermal conductivity detector (TCD) 9 . In the present work, an innovative approach based on measurement of the vapour concentration in the permeate stream, using a Flame Ionisation Detector (FID) is tested.…”

Transport behavior of aromatic hydrocarbons through high density polyethylene/ ethylene propylene diene terpolymer blends

“…Transport of small molecules through polymers and polymer blends has been studied extensively by various research groups [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Research in this area has been quite active and interesting reports on the interaction of polymer membranes with different liquids exist in the literature.…”

“…Katoch et al [9] synthesized a new system of saturated polyester and their nanocomposites from glycolyzed polyethylene terephthalate (PET) with varied composition and conducted sorption and diffusion studies in water. A comprehensive study of the mass transport of two volatile organic compounds heptanes and toluene and their binary mixtures through dense semi crystalline low density polyethylene membranes was done by Friess et al [11]. Cui and coworkers [13] have investigated the relation between free volume and barrier properties in the miscible blends of poly (vinyl alcohol) and nylon 6-clay nanocomposite film.…”