Influence of film thickness on the structure and properties of PDMS membrane

Jadav, Ghanshyam L.; Aswal, Vinod K.; Bhatt, Hitesh; Chaudhari, Jayesh C.; Singh, Puyam S.

doi:10.1016/j.memsci.2012.05.043

Cited by 67 publications

(32 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Polydimethylsiloxane (PDMS) has already been used for pervaporation of organics/inorganics mixture. [10][11][12][13][14][15][16][17] Jadav et al 10 prepared high flux PDMS membranes for separation of organics from water by pervaporation. The influence of film thickness on the structure and properties of PDMS membrane was studied.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Silicalite‐1/PDMS surface sieving pervaporation membrane for separation of ethanol/water mixture

Liu

et al. 2015

J of Applied Polymer Sci

View full text Add to dashboard Cite

To improve the pervaporation performance of Silicalite-1/PDMS composite membrane by adding a small amount of Silicalite-1 zeolite, novel Silicalite-1/PDMS surface sieving membranes (SSMs) were prepared by attaching Silicalite-1 particles on the PDMS membrane surface. The obtained membranes and traditional mixed-matrix membranes (MMMs) were characterized by SEM, XRD, TGA, FT-IR, and pervaporation separation of ethanol-water mixture. Effects of Silicalite-1 particles content, feed temperatures, and feed compositions on the separation performance were discussed. From the cross-section view SEM images of SSMs, a two-layer structure was observed. The thickness of the Silicalite-1 layer was about 300 nm to 2 lm. The TGA analysis indicates that the zeolite concentration in 3 wt % SSM is lower than 10 wt % MMMs. In the ethanol/water pervaporation experiment, the separation factor of Silicalite-1/PDMS SSMs increased considerably compared with pure PDMS membrane. When the suspensions concentrations of Silicalite-1 particles reached 3 wt %, the separation factor was about 217% increase over pure PDMS membrane and 52.9% increase over 10 wt % Silicalite-1/PDMS MMMs. As the ethanol concentration in the feed increases, the separation factor of SSMs increases, whereas permeation flux decreases. At the same time, with increasing operating temperature, the permeation flux of SSMs increased. The stability of SSMs at high temperature is better than the traditional MMMs.

show abstract

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Silicalite‐1/PDMS surface sieving pervaporation membrane for separation of ethanol/water mixture

Liu

et al. 2015

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…To date, many hydrophobic membranes such as polydimethysiloxane (PDMS) membranes [3][4][5][6][7][8], polytrimethylsilyl-1-prepared thin-film zeolite filled PDMS composite membranes by using ultrafine silicalite-1 particles. Moermans et al [21] reported the incorporation of nano-sized zeolite particles in PDMS membranes and found that the incorporation of nano-sized zeolite could improve the PV performance of membranes.…”

Section: Introductionmentioning

confidence: 99%

Improved performance of PDMS/silicalite-1 pervaporation membranes via designing new silicalite-1 particles

Zhuang

Chen

et al. 2015

Journal of Membrane Science

View full text Add to dashboard Cite

“…This phenomenon suggests that only the addition of HSO reduces the polymer crystallinity, 37 thus lowering the non-continuity nature produced by the crystalline domains and the possibility of large structural defects in the ultrathin membranes. G. L. Jadav et al 37 have proved that the crystallites in thin membranes could lead to the membrane structure with defects and such membranes will give high ux but less selectivity. And this indicates the possible higher separation factor of PVTES-HSO membrane when separating ethanol/water system.…”

mentioning

confidence: 99%

Copolymerization modification of poly(vinyltriethoxysilane) membranes for ethanol recovery by pervaporation

et al. 2017

View full text Add to dashboard Cite

In this study, a copolymerization modification method is used to modify the rigid structure of a high-flux poly(vinyltriethoxysilane) (PVTES) membrane, which was prepared from VTES monomers in our previous work, to further enhance its separation factor. A value of R/Si, which could characterize the density of organic groups and the chain flexibility in membrane materials, is introduced here to guide the selection of modification chemicals. Modifiers with different polymerization degree but the same flexible chain unit (DMDES, HSO and PDMS) are chosen to be copolymerized with PVTES. Analysis results show that the PVTES-HSO membrane possesses lower thickness, higher amount of hydrophobic groups, and an inner structure with greater chain flexibility and lower crystallinity, leading to the best pervaporation (PV) performance among these modified membranes, which is much better than the original PVTES membrane. Furthermore, PVTES-HSO membranes with different R/Si values are prepared to optimize their PV performance. And the optimal PVTES-HSO membrane (R/Si ¼ 1.4) shows the best performance with the separation factor of 6.6 and flux up to 8160 g m À2 h À1 when separating 9 wt% ethanol aqueous solution at 35 C.

show abstract

Influence of film thickness on the structure and properties of PDMS membrane

Cited by 67 publications

References 44 publications

Preparation and characterization of Silicalite‐1/PDMS surface sieving pervaporation membrane for separation of ethanol/water mixture

Preparation and characterization of Silicalite‐1/PDMS surface sieving pervaporation membrane for separation of ethanol/water mixture

Improved performance of PDMS/silicalite-1 pervaporation membranes via designing new silicalite-1 particles

Copolymerization modification of poly(vinyltriethoxysilane) membranes for ethanol recovery by pervaporation

Contact Info

Product

Resources

About