PDMS modified membranes by 1-Dodecanol (cas 112-53-8) and its effect on ethanol removal by pervaporation
-
Add time:08/21/2019 Source:sciencedirect.com
Hydrophobic polydimethylsiloxane (PDMS) membranes in pervaporation are used to remove ethanol compounds from aqueous solutions as fermentation broths. Conventional PDMS membranes, which have been extensively studied, have high fluxes but relatively low selectivities. A new technique to modified PDMS pervaporation membranes is proposed, where a high molecular weight and hydrophobic compound (1-Dodecanol (cas 112-53-8)) is inserted in the PDMS polymeric layer at several concentrations. The effect of 1-dodecanol concentration in the PDMS layer on flux and selectivity for ethanol removal has been measured. The unmodified and modified PDMS layers were analyzed by SEM to study the membrane layer morphology. Also, TGA and DTG were performed to estimate the 1-dodecanol composition in the PDMS layer remaining after membrane deposition and curing. Pervaporation experiments were carried out at 31 °C for ethanol concentrations in aqueous solutions of 40, 80 and 170 g/L to identify the performance as a function of 1-dodecanol load in the separation layer. The separation factor increases with the concentrations of 1-dodecanol in the polymeric layer while total flux decreases. It is known that although PDMS is a hydrophobic material a high water permeation occurs due to swelling and the molecular interaction between ethanol and water during the ethanol mass transfer across the membrane. The high hydrophobicity of 1-dodecanol reduces this behavior. This new approach presents a strategy to obtain more selective polymeric membranes or with modified properties.
We also recommend Trading Suppliers and Manufacturers of 1-Dodecanol (cas 112-53-8). Pls Click Website Link as below: cas 112-53-8 suppliers
Prev:Equilibria investigation and extraction thermodynamic of extracting (o-/m-/p-)-cresol from aqueous solution using 1-Dodecanol (cas 112-53-8)
Next:Wall slip in an EHL contact lubricated with 1-Dodecanol (cas 112-53-8)) - 【Back】【Close 】【Print】【Add to favorite 】
- Related Information
- Fatty acids/1-Dodecanol (cas 112-53-8) binary eutectic phase change materials for low temperature solar thermal applications: Design, development and thermal analysis08/28/2019
- Membrane-assisted extractive butanol fermentation by Clostridium saccharoperbutylacetonicum N1-4 with 1-Dodecanol (cas 112-53-8) as the extractant08/27/2019
- Potassium-promoted Mo/MWCNTs catalysts for effective partial oxidation of 1-Dodecanol (cas 112-53-8) to 1-dodecanal08/26/2019
- Mechanism and kinetics of 1-Dodecanol (cas 112-53-8) etherification over tungstated zirconia08/25/2019
- Phase behavior of the carbon dioxide + 1-Dodecanol (cas 112-53-8) system at high pressures08/24/2019
- Crystallisation of sodium dodecyl sulfate and the corresponding effect of 1-Dodecanol (cas 112-53-8) addition08/23/2019
- Wall slip in an EHL contact lubricated with 1-Dodecanol (cas 112-53-8)08/22/2019
- Equilibria investigation and extraction thermodynamic of extracting (o-/m-/p-)-cresol from aqueous solution using 1-Dodecanol (cas 112-53-8)08/20/2019