Pervaporation separation of an azeotropic mixture of a tetrahydrofuran–water system with nanostructured polyhedral oligomeric silsesquioxane embedded poly(vinyl alcohol)

2018 ◽  
Vol 136 (7) ◽  
pp. 47060 ◽  
Author(s):  
Valiya Parambath Swapna ◽  
Thomasukutty Jose ◽  
Soney C. George ◽  
Sabu Thomas ◽  
Ranimol Stephen
Keyword(s):  
Vinyl Alcohol ◽  
Water System ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Azeotropic Mixture ◽  
Poly Vinyl Alcohol ◽  
Oligomeric Silsesquioxane ◽  
Pervaporation Separation

Changes in free volume and gas permeation properties of poly(vinyl alcohol) nanocomposite membranes modified using cage‐structured polyhedral oligomeric silsesquioxane

2020 ◽  
Vol 138 (10) ◽  
pp. 49953
Author(s):  
Valiya Parambath Swapna ◽  
Abitha Vayyaprontavida Kaliyathan ◽  
Vakkoottil Sivadasan Abhisha ◽  
Hanna Joseph Maria ◽  
Padinharu Madathil Gopalakrishnan Nambissan ◽  
...  
Keyword(s):  
Free Volume ◽  
Vinyl Alcohol ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Gas Permeation ◽  
Poly Vinyl Alcohol ◽  
Nanocomposite Membranes ◽  
Oligomeric Silsesquioxane ◽  
Permeation Properties

scholarly journals Separation of Benzene/Cyclohexane Mixtures by Pervaporation Using Poly (Ethylene-Co-Vinylalcohol) and Carbon Nanotube-Filled Poly (Vinyl Alcohol-Co-Ethylene) Membranes

Separations ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 68
Author(s):  
Hala Zahlan ◽  
Waseem Sharaf Saeed ◽  
Saad Alqahtani ◽  
Taieb Aouak
Keyword(s):  
Carbon Nanotube ◽  
Separation Factor ◽  
Vinyl Alcohol ◽  
Azeotropic Mixture ◽  
Poly Vinyl Alcohol ◽  
Permeate Flux ◽  
Scanning Calorimetry ◽  
Absorption Area ◽  
Poly Ethylene ◽  
Pervaporation Separation

Poly(ethylene-co-vinylalcohol) (E-VOH) and carbon nanotube-filled poly (vinyl alcohol-co-ethylene) (E-VOH/CNT) were used as membranes to separate benzene/cyclohexane mixtures by pervaporation technique. To reach this goal, E-VOH and E-VOH/CNT membranes were prepared by solvent casting method and characterized by differential scanning calorimetry (DSC), thermogravimetry analysis (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The swelling tests were used to study the mass transfer of the benzene/cyclohexane mixture and their pure components. The separation by pervaporation process was carried out at 25 °C in which the effect of CNTs incorporated into E-VOH matrix and the initial concentration of benzene in the feed on the permeate flux, j, and separation factor, β, performance was investigated. The results obtained were very promising, in which the integration of CNTs through E-VOH chains increased the absorption area and raised the flux to 740 g/m2∙h. The separation factor increased to 9.03 and the pervaporation separation reached an index of 5942.2 g/m2∙h for the azeotropic mixture during 3 h of the separation process. In contrast, for the unfilled E-VOH membrane, it was found that these parameters were a rise of 280 g∙m−2∙h−1, separation factor of 12.90 and pervaporation separation index of 3332.0 g/m2∙h, under the same conditions. Likewise, the calculation of the performance of the E-VOH/CNT membrane with regard to that of the unfilled membrane indicated 2.64 for the total flux and 0.70 for the separation factor. It was also revealed that the best compromise of the filled membrane in terms of total cumulative flux and separation factor is obtained for the feed containing the azeotropic mixture.

Effect of nanostructured polyhedral oligomeric silsesquioxane on the physical properties of poly(vinyl alcohol)

2017 ◽  
Vol 134 (43) ◽  
pp. 45447 ◽  
Author(s):  
Swapna Valiya Parambath ◽  
Deepalekshmi Ponnamma ◽  
Kishor Kumar Sadasivuni ◽  
Sabu Thomas ◽  
Ranimol Stephen
Keyword(s):  
Physical Properties ◽  
Vinyl Alcohol ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Poly Vinyl Alcohol ◽  
Oligomeric Silsesquioxane

Free volume defects and transport properties of mechanically stable polyhedral oligomeric silsesquioxane embedded poly(vinyl alcohol)‐poly(ethylene oxide) blend membranes

2019 ◽  
Vol 68 (7) ◽  
pp. 1280-1291 ◽  
Author(s):  
Valiya Parambath Swapna ◽  
Padinharu Madathil Gopalakrishnan Nambissan ◽  
Selvin P Thomas ◽  
Abitha Vayyaprontavida Kaliyathan ◽  
Thomasukutty Jose ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Transport Properties ◽  
Free Volume ◽  
Vinyl Alcohol ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Poly Vinyl Alcohol ◽  
Blend Membranes ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Oligomeric Silsesquioxane

Preparation and characterization of B2SA grafted hybrid poly(vinyl alcohol) membranes for pervaporation separation of water-isopropanol mixtures

2019 ◽  
Vol 22 ◽  
pp. 100245 ◽  
Author(s):  
Akshay S. kulkarni ◽  
Sonal M. Badi ◽  
Ashok M. Sajjan ◽  
Nagaraj R. Banapurmath ◽  
Mahadevappa Y. Kariduraganavar ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Pervaporation Separation
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