Journal ArticleDOI
Characterization of poly(dimethylsiloxane)‐poly(methyl hydrogen siloxane) composite membranes for organic water pervaporation separation
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In this article, a crosslinked poly(dimethylsiloxane)-poly(methyl hydrogen siloxane) selective layer with a new laboratory made catalyst agent was used for the pervaporation separation of five organic solvent-water mixtures and swelling experiments in the same feed mixtures.Abstract:
Hydrophobic composite membranes with a crosslinked poly(dimethylsiloxane)-poly(methyl hydrogen siloxane) selective layer were prepared by using a new laboratory made catalyst agent. The pervaporation separation of five organic solvent–water mixtures was carried out with these composite membranes, together with swelling experiments in the same feed mixtures. The volatile organic compounds employed were ethanol, methanol, 1-butanol, acetone, and ethyl acetate. The pervaporation and swelling experiments revealed that both the 1-butanol and the ethyl acetate solutions showed the highest affinity for the composite membrane. When these components were employed as feed solutions, the membranes showed both high selectivity and high permeation. Mechanical–dynamical experiments of swollen and nonswollen composite membranes were also performed. The relaxation spectra were analyzed in terms of the interaction of the components of the different mixtures with the composite membrane, and the free volume corresponding to the each sample was obtained. Once the membranes had reached an equilibrium swelling, a decrease in the free volume was observed. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 546–556, 2001read more
Citations
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Journal ArticleDOI
Composite PDMS membrane with high flux for the separation of organics from water by pervaporation
TL;DR: In this article, the composite polydimethylsiloxane (PDMS) membranes supported by Cellulose acetate (CA) were prepared by pre-wetting method for the separation of methanol, ethanol, n-propanol and acetone from water.
Journal ArticleDOI
Polydimethylsiloxane (PDMS)/Ceramic Composite Membrane with High Flux for Pervaporation of Ethanol−Water Mixtures
TL;DR: In this article, polydimethylsiloxane (PDMS) was deposited uniformly on the surface of tubular nonsymmetric ZrO2/Al2O3 porous ceramic supports.
Journal ArticleDOI
Optimization of preparation conditions for polydimethylsiloxane (PDMS)/ceramic composite pervaporation membranes using response surface methodology
TL;DR: In this paper, the authors used response surface methodology (RSM) to optimize the preparation conditions that had great effects on the performance of the polydimethylsiloxane (PDMS)/ceramic composite membranes for pervaporation.
Journal ArticleDOI
Properties and separation performance of Ge-ZSM-5 membranes
TL;DR: Germanium-substituted ZSM-5 zeolite membranes with various Si/Ge ratios were synthesized by in situ crystallization on porous tubular stainless steel and α-Al2O3 supports.
Journal ArticleDOI
Pervaporation of alcohols through highly permeable PIM-1 polymer films
S. V. Adymkanov,Yu. P. Yampolskii,A. M. Polyakov,Peter M. Budd,Karen J. Reynolds,Neil B. McKeown,Kadhum J. Msayib +6 more
TL;DR: In this article, the pervaporation characteristics of PIM-1 have been systematically studied and the rates of mass transfer for individual components at various temperatures have been estimated, and for the ethanol-water binary mixture, the process of separation has been examined.
References
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TL;DR: In this article, the authors describe the nature of Viscoelastic behavior of polymeric systems and approximate relations among the linear Viscoels and approximate interrelations among the Viscelastic Functions.
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TL;DR: Menard et al. as mentioned in this paper discuss the use of dynamic mechanical analysis (DMA) as a tool for thermal analysis, rheology, and materials science in the analytical laboratory.
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Studies in Newtonian Flow. V. Further Verification of the Free‐Space Viscosity Equation
TL;DR: In this paper, the limiting specific volume v0 calculated by a trial-and-error procedure from n−alkane viscosity data using the author's free-space viscoity equation, lnη=B(v0/vf)+lnA, agree substantially with previously published values obtained by extrapolation of density data.
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Vapour sorption and permeation properties of poly(dimethylsiloxane) films
TL;DR: Sorption and permeation of several organic vapours in poly (dimethylsiloxane) were investigated in this article, where the solubility and permeability coefficients measured show a strong dependence of the applied vapour activity typical for these systems, contrary to the behaviour of permanent gases.
Journal ArticleDOI
Sorption/desorption properties of ethanol, toluene, and xylene in poly(dimethylsiloxane) membranes
Yi-Ming Sun,Jack Chen +1 more
TL;DR: In this article, the diffusion coefficient of ethanol, toluene, and xylene vapors in a poly(dimethylsiloxane) membrane containing about 32 wt % silica resin at 25°C.