Selective polydimethylsiloxane/polyimide blended IPN pervaporation membrane for methanol/toluene azeotrope separation

Garg, Parul; Singh, R. P.; Choudhary, Veena

doi:10.1016/j.seppur.2010.11.012

Cited by 41 publications

(12 citation statements)

References 25 publications

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“…In addition, the membrane solute-solvent blend interaction had an excessive consequence on the transport process of sorption and diffusion. The effect of transport is related to not only the polymer properties, such as free volume, chain mobility, degree of cross-linking, etc., but also the properties of the permeating components, molecular size, molecular shape, temperature, and concentration of the permeating component (12).…”

Section: Influence Of Pst Content On Ipns Supported Membrane Performancementioning

confidence: 99%

“…Garg (12) described the preparation and investigation of membranes based on new interpenetrating polymer network (IPN) of vinyl terminated poly(dimethyl siloxane) and aromatic polyimide (PI) with respect to their thermal and pervaporation properties. The modified membranes were prepared using simultaneous IPN (SIPN) technique by variation of polyimide loading of 5, 10, and 15 wt.%, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Polystyrene on PDMS IPNs Blend Membrane Performance

Ahmed

Nawawi

et al. 2012

Separation Science and Technology

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In this work, a series of pervaporation blend membranes with polydimethylsiloxane (PDMS)/polystyrene (PS) were prepared by using the sequential interpenetrating polymer network (IPNs) technique with various amount of PS (10-70 wt.%). The blend IPN membranes were supported by Teflon (polytetrafluoroethylene) ultrafiltration membrane. Effect of PS contents in PDMS IPNs on crosslinked density, molecular weight, network-chain segment concentration, water swelling properties, and tensile properties were investigated. Results revealed that the degree of crosslink density and tensile strength of the PDMS IPNs blend membrane depending on wt.% of PS added and scan electron microscope image confirmed that the PDMS/PSt IPN membranes have continuous microphase structures. The synthesized IPNs blend membrane was used for ethanol recovery from aqueous solution by pervaporation, and exhibited enhanced separation performance compared with PDMS membranes. The maximum separation factor of IPNs blend membrane were obtained at 50 C, and the total flux increased exponentially along with the increase of temperature. The PDMS/PS membrane synthesized by 50 wt.% PS gave the best pervaporation performance with a selectivity (a) of 7.6, permeation rate of 214 g/m 2 h with a 10 wt.% ethanol (EtOH) concentration at 60 C.

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Section: Influence Of Pst Content On Ipns Supported Membrane Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Polystyrene on PDMS IPNs Blend Membrane Performance

Ahmed

Nawawi

et al. 2012

Separation Science and Technology

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“…prepared the polyacrylamide (PAAm)/hyaluronic acid–gelatin (HA–gel) IPN hydrogels, and found that PAAm as the flexible network was introduced to significantly enhance the mechanical strength of HA–gel by IPN . At present, the IPN materials have been widely studied and prepared for various application fields including hydrogels, superabsorbent, polyelectrolyte film, controlled release materials, coating materials in various systems such as PDMS/PI, NR/CS, PU/EP, PMMA/PS, IPN. To our knowledge, there is very limited research with IPN in controlled release fertilizers (CRF) area.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of bio‐based PA/EP interpenetrating network polymer as coating material for controlled release fertilizers

Jia

Zhang

et al. 2017

J of Applied Polymer Sci

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A novel controlled release fertilizer was developed using interpenetrating polymer network (IPN) as the coating material. The IPN was successfully sprayed on the surface of the urea particles to form IPN-coated fertilizers (IPNCU) for controlled nitrogen release. The IPN was synthesized by bio-based polyamide (PA) from D-glucaric acid and epoxy (EP) through network interpenetrating. The chemical structure and microscopic morphology characteristics of IPN were examined by Fourier transform infrared spectroscopy, 1 Hnuclear magnetic resonance, and scanning electron microscopy. The property of IPN with the different PA/EP mass ratios were investigated and compared with that of EP-coated fertilizers (EPCU). The nutrient release behaviors of IPNCU in water and soil were detected. The results showed that the IPNCU with 5% PA content increased the nitrogen release longevity by 41 days, raised the water contact angle of surface by 23.98, and then significantly slowed the nitrogen release rate of the IPNCU. The nutrient release mechanism of IPNCU was discussed in detail. This work indicated that the environment-friendly IPN with superior controlled release properties could be especially useful in horticultural and agricultural applications.

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“…The methanol-toluene mixture forms a minimum boiling point azeotrope at a mass composition of 68 % methanol at a constant pressure of 101.3 kPa 4 . Studies using pervapouration have been reported to determine the displacement of the methanoltoluene azeotrope [5][6][7][8] . However, all these processes were unable for industrial application due to the high operating costs, operative problems and their feasibility is still being studied in labs.…”

Section: Introductionmentioning

confidence: 99%

Separation of Methanol-Toluene Azeotropic Mixture by Extractive Distillation

Tang¹,

Bai²,

Zhang³

et al. 2013

Asian J. Chem.

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Methanol and toluene formed a minimum azeotrope and extractive distillation should be a suitable method to separate their mixture. In this work, a systematic study of the separation of methanol-toluene mixture with an entrainer by extractive distillation was performed. o-Xylene was chosen to be the entrainer because it could break the original binary azeotrope. Vapour-liquid equilibrium (VLE) of methanol-toluene-o-xylene system was determined experimentally and NRTL model was the most suitable one to predict this system. The feasibility analysis of this process was validated by simulation through chemical process simulation software-Aspen Plus and the optimal operating conditions of the extractive distillation process were valuable for industrial applications. Simulation results were then corroborated in a batch experimental packing column. In both the simulation and experiments, methanol and toluene, whose purity is more than 99.5 %, were obtained respectively.

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Selective polydimethylsiloxane/polyimide blended IPN pervaporation membrane for methanol/toluene azeotrope separation

Cited by 41 publications

References 25 publications

Influence of Polystyrene on PDMS IPNs Blend Membrane Performance

Influence of Polystyrene on PDMS IPNs Blend Membrane Performance

Synthesis and characterization of bio‐based PA/EP interpenetrating network polymer as coating material for controlled release fertilizers

Separation of Methanol-Toluene Azeotropic Mixture by Extractive Distillation

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