Pervaporation of acetic acid/water mixtures through silicalite filled polydimethylsiloxane membranes

Preparation and characterization of vinyltriethoxysilane (VTES) modified silicalite-1/PDMS hybrid pervaporation membrane and its application in ethanol separation from dilute aqueous solution

“…6. As for pure PDMS membrane, it is generally believed that it has a dense structure without pores if the membrane is properly prepared [16,38,44], as shown in Fig. 6(a) and (d).…”

“…On the other hand, the presence of silicalite-1 particles also helped to adsorb the thermal energy and thus protected PDMS from thermal attack. The former effect made PDMS easier to decompose into smaller and thus more volatile products, leading to a more rapid weight loss, while the latter effect helped to protect PDMS from thermal attack and raise the decomposition temperature [44]. Therefore, the weight loss of hybrid membranes from 423 to 623 K mainly attributed to the degradation of small and volatile products of PDMS decomposition.…”

Preparation and applying the membranes with carbon black to pervaporation of toluene from the diluted aqueous solutions

“…In many cases, filled polymeric membranes show permeabilities much lower than the conventional unfilled membranes, and hence can serve as barriers for oxygen, water and other solutes [7]. In the area of organophilic pervaporation membranes mostly tree types of fillers have been used: zeolite [8][9][10][11], silicate [8,12] and carbon sieve [13][14][15][16].…”

Novel sodium alginate–Na+MMT hybrid composite membranes for pervaporation dehydration of isopropanol, 1,4-dioxane and tetrahydrofuran

“…In PV, membrane acts as a third phase to achieve separation of azeotropes, whereas in distillation, ben- zene (a deadly carcinogen) is used as an entrainer to achieve such a separation. In the literature, a variety of zeolites have been used as fillers to circumvent the problems associated with low flux, selectivity and mechanical strength properties of the pristine PV membranes [2][3][4][5][6][7]. However, in comparison to zeolite-filled membranes, published data on clay-modified hybrid composite membranes is somewhat rare [8,9].…”