Enhanced Ethanol Separation by Corona-Modified Surface MWCNT Composite PDMS/PES.PVP Membrane

Farahi, Amirhossein; Najafpour, Ghasem; Ghoreyshi, Ali Asghar

doi:10.1007/s11837-018-3158-8

Cited by 14 publications

(4 citation statements)

References 28 publications

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“…Among several methods for membrane surface modification, plasma treatment is frequently used in PV due to its ability to change the chemistry of the top surface region of the membrane as a dry method. Surface modification by plasma treatment was used in composite membranes to increase the PV selectivity for the separation of azeotropic methanol/toluene mixtures, 19 methanol/methyl tert‐butyl ether separation by polymerization of acrylic acid (AA) on poly(3‐hydroxybutyrate) membranes, 20 the separation of ethyl acetate from water employing a dual‐layer mixed matrix membrane, 21 the recovery of ethyl acetate from aqueous solution, 22 the dehydration transport properties of isopropyl alcohol‐water in polyvinyl alcohol membranes, 23 and ethanol from water solution mixtures 24 …”

Section: Introductionmentioning

confidence: 99%

“…Surface modification by plasma treatment was used in composite membranes to increase the PV selectivity for the separation of azeotropic methanol/ toluene mixtures, 19 methanol/methyl tert-butyl ether separation by polymerization of acrylic acid (AA) on poly (3-hydroxybutyrate) membranes, 20 the separation of ethyl acetate from water employing a dual-layer mixed matrix membrane, 21 the recovery of ethyl acetate from aqueous solution, 22 the dehydration transport properties of isopropyl alcohol-water in polyvinyl alcohol membranes, 23 and ethanol from water solution mixtures. 24 Vacuum ultraviolet (VUV) is an important component within a plasma source, and many studies have been dedicated to understanding the role of VUV and UV radiation in plasma treatment, in particular when polymer surfaces are involved. [25][26][27][28] For example, Weilnboeck et al have found the elimination of oxygen in pendant groups as deep as 200 nm, together with a reduction in the polymer film thickness under VUV irradiation.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced glycerol dehydration of pervaporation cross‐linkedPVAmembranes modified byVUV/UV‐Ctreatments

Backes

Weibel

2021

J of Applied Polymer Sci

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The high glycerol miscibility in water needs more efficient processes to decrease the cost of dehydration. Water stable poly(vinyl alcohol) based membranes cross‐linked with 15% w/w of maleic acid were used for dehydrating glycerol‐water mixtures using pervaporation (PV). The membranes were characterized using water contact angle, profilometry, Fourier transformed infrared spectroscopy‐attenuated total reflectance, x‐ray photoelectron spectroscopy, water stability, swelling tests, and PV. Membranes were treated using dry methods with vacuum ultraviolet (VUV; 162 nm) or ultraviolet (UV)‐C (254 nm) radiation and exposed to O2 or acrylic acid vapors, respectively. The VUV and UV‐C treatments improve PV performances, increasing the water separation selectivity more than 4 and 8.5 times, respectively. UV‐C treatments exhibit a water flux (kg m−2 h−1), selectivity and PSI (kg m−2 h−1) of 0.3, 250, and 87.4 respectively. Highly hydrophilic functional groups grafted onto the surface of the membranes after irradiation favor the selective transfer of water through the membrane. Overall, the VUV or UV‐C membrane treatments show great PV prospect in glycerol dehydration.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced glycerol dehydration of pervaporation cross‐linkedPVAmembranes modified byVUV/UV‐Ctreatments

Backes

Weibel

2021

J of Applied Polymer Sci

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“…The wonderful levels of mechanical, electrical, thermal, and physical properties of carbon nanotubes (CNT) have motivated the increasing interests for the investigation of composites containing CNT as polymer/CNT nanocomposites (PCNT) . The electrical conductivity of CNT reaches to 10 6 S/m, but the polymer matrices usually show the conductivity of 10 −16 to 10 −12 S/m .…”

Section: Introductionmentioning

confidence: 99%

Simulation of tunneling distance and electrical conductivity for polymer carbon nanotubes nanocomposites by interphase thickness and network density

2020

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This article develops simple equations for tunneling distance between adjacent nanoparticles (d) and electrical conductivity of polymer/carbon nanotubes (CNT) nanocomposites (PCNT). The developed model considers the significances of CNT dimensions and waviness as well as interphase region surrounding CNT on the conductivity of nanocomposites. Moreover, d is defined by the sizes of CNT, interphase thickness and network density. The roles of all parameters for nanoparticles, interphase, percolation threshold and conductive network in the nanocomposite conductivity and tunneling distance are determined. Among the studied parameters, the fraction of percolated CNT of 0.6 and d = 1 nm provide the highest conductivity of PCNT, while d > 2.5 nm cause an insulated nanocomposite. In addition, the high concentration of thin CNT, a thick interphase, poor waviness, low percolation threshold, and the small fraction of percolated CNT produce an optimized level for d.

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“…For example, van der Waals attractions create aggregates/agglomerates during the fabrication of nanocomposites [15][16][17]. The CNT can be modified with strong acid or strong oxidization agents to disrupt the agglomerates and provide the noble dispersal of filler at the nanoscale in the polymer medium, which are obligatory to develop the sample properties [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Model Progress for Tensile Power of Polymer Nanocomposites Reinforced with Carbon Nanotubes by Percolating Interphase Zone and Network Aspects

Zare

Rhee

2020

Polymers

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In the present work, a simple simulation is advanced based on a Callister equation considering the impacts of interphase and carbon nanotube (CNT) nets on the strength of nanocomposites after percolation onset. The advanced model can analyze the strength of nanocomposite by filler aspect ratio (α), percolation beginning ( φ p ), interphase depth (t), interphase power (σi), net density (N), and net power (σN). The empirical consequences of several samples agree with the estimations of the industrialised model. The nanocomposite strength straightly depends on “α”, “t”, “σi”, “N”, and “σN”, while the radius and percolation onset of CNT play the inverse characters. The reasonable impacts of net and interphase possessions on the nanocomposite strength rationalise the accurate progress of the Callister equation.

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Enhanced Ethanol Separation by Corona-Modified Surface MWCNT Composite PDMS/PES.PVP Membrane

Cited by 14 publications

References 28 publications

Enhanced glycerol dehydration of pervaporation cross‐linkedPVAmembranes modified byVUV/UV‐Ctreatments

Enhanced glycerol dehydration of pervaporation cross‐linkedPVAmembranes modified byVUV/UV‐Ctreatments

Simulation of tunneling distance and electrical conductivity for polymer carbon nanotubes nanocomposites by interphase thickness and network density

Model Progress for Tensile Power of Polymer Nanocomposites Reinforced with Carbon Nanotubes by Percolating Interphase Zone and Network Aspects

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