Role of functional nanoparticles to enhance the polymeric membrane performance for mixture gas separation

Ingole, Pravin G.,Baig, Muhammad Irshad,Choi, Wook,An, Xinghai,Choi, Won Kil,Lee, Hyung Keun Elsevier 2017 Journal of industrial and engineering chemistry Vol.48 No.-

<P><B>Abstract</B></P> <P>To improve the water vapor/gas separation the hydroxylated TiO<SUB>2</SUB> (OH-TiO<SUB>2</SUB>) nanopartilces have been synthesized and surface of polysulfone (PSf) hollow fiber membrane (HFM) has been coated as thin film nanocomposite (TFN) membranes. To remove the water vapor from mixture gas, hollow fiber membrane has been fabricated and while coating, the OH-TiO<SUB>2</SUB> nanoparticles have been incorporated in the <I>m</I>-phenylenediamine (MPD) solution to make TFN membrane. Aqueous MPD—OH-TiO<SUB>2</SUB> nanoparticles mix solutions and organic trimesoyl chloride (TMC) were used to prepare the TFN membranes on the surface of the PSf HFM substrate. Pristine TiO<SUB>2</SUB> surface was modified to initiate functional groups on the TiO<SUB>2</SUB> surface to increase the hydrophilicity of the nanoparticles. Fourier transform infrared (FT-IR) spectroscopy was used to confirm the hydroxylation of TiO<SUB>2</SUB> nanoparticles. The membranes were well characterized using different physicochemical characterization techniques. The membrane performances were evaluated based on water vapor permeance, selectivity, water vapor flux and water vapor removal efficiency. Obtained experimental results designated that the incorporated OH-TiO<SUB>2</SUB> nanoparticles were dispersed well while interfacial polymerization in the TFN layer and their addition enhanced membrane performances. With an increasing concentration of OH-TiO<SUB>2</SUB> nanoparticles from 0.025 to 0.2wt.% compare with MPD solution during the fabrication, water vapor permeance and selectivity significantly enhanced due to the amplified water vapor permeation corridors afforded by the modified OH-TiO<SUB>2</SUB> nanoparticles. After increasing the concentration of OH-TiO<SUB>2</SUB> more than 0.2wt.% in the monomer solution the agglomeration was started. The results revealed that the addition of modified hydroxylated TiO<SUB>2</SUB> in MPD solution up to 0.2w/w% (membrane sample TFN-4 (MT(0.5, 0.2)-OH-TiO<SUB>2</SUB>-0.2)) increased the permeate flux and showed the best permeance 1396 GPU and selectivity 510 among the all prepared membranes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Hydrophilic functional TiO<SUB>2</SUB> NPs are synthesized to prepare TFN membranes. </LI> <LI> Interfacial interactions between MPD, TMC and OH-TiO<SUB>2</SUB> nanoparticles are studied. </LI> <LI> The incorporated 0.2wt.% OH-TiO<SUB>2</SUB> nanoparticles show superior results. </LI> <LI> The relationship between TNF morphology and performance is investigated. </LI> <LI> Tunable water vapor permeance and selectivity are achieved. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Role of functional nanoparticles to enhance the polymeric membrane performance for mixture gas separation

Pravin G. Ingole,Muhammad Irshad Baig,최욱,Xinghai An,최원길,이형근 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.48 No.-

To improve the water vapor/gas separation the hydroxylated TiO2 (OH-TiO2) nanopartilces have beensynthesized and surface of polysulfone (PSf) hollowfiber membrane (HFM) has been coated as thinfilmnanocomposite (TFN) membranes. To remove the water vapor from mixture gas, hollowfiber membranehas been fabricated and while coating, the OH-TiO2 nanoparticles have been incorporated in the mphenylenediamine(MPD) solution to make TFN membrane. Aqueous MPD—OH-TiO2 nanoparticles mixsolutions and organic trimesoyl chloride (TMC) were used to prepare the TFN membranes on the surfaceof the PSf HFM substrate. Pristine TiO2 surface was modified to initiate functional groups on the TiO2surface to increase the hydrophilicity of the nanoparticles. Fourier transform infrared (FT-IR)spectroscopy was used to confirm the hydroxylation of TiO2 nanoparticles. The membranes were wellcharacterized using different physicochemical characterization techniques. The membrane performanceswere evaluated based on water vapor permeance, selectivity, water vaporflux and water vaporremoval efficiency. Obtained experimental results designated that the incorporated OH-TiO2 nanoparticleswere dispersed well while interfacial polymerization in the TFN layer and their additionenhanced membrane performances. With an increasing concentration of OH-TiO2 nanoparticles from0.025 to 0.2 wt.% compare with MPD solution during the fabrication, water vapor permeance andselectivity significantly enhanced due to the amplified water vapor permeation corridors afforded by themodified OH-TiO2 nanoparticles. After increasing the concentration of OH-TiO2 more than 0.2 wt.% in themonomer solution the agglomeration was started. The results revealed that the addition of modifiedhydroxylated TiO2 in MPD solution up to 0.2 w/w% (membrane sample TFN-4 (MT(0.5, 0.2)-OH-TiO2-0.2))increased the permeateflux and showed the best permeance 1396 GPU and selectivity 510 among the allprepared membranes.

Synthesis of solid enantioselective macromer of trimesic acid for the enantiomeric separation of chiral alcohols

Ingole, Pravin G.,Bajaj, Hari C.,Singh, Kripal Techno-Press 2013 Advances in materials research Vol.2 No.1

Enantioselective macromer of trimesic acid was prepared using S(-) menthol with trimesoyl chloride on polyimide (PI) ultrafiltration membrane. The chemical composition of macromer as well as polyimide ultrafiltration membrane was determined by ATR-FTIR Spectroscopy. The optical resolution of chiral alcohols was performed in pressure driven process. The effect of monomer solutions concentration, effect of air-drying time of S(-) menthol solution, effect of reaction time, effect of operating pressure, effect of feed concentration of racemate on the performance of macromer was studied. The synthesised material exhibits separation of chiral alcohols (menthol ~23% and sobrelol ~21%).

Preparation and performance of TFC-HF membrane through the interfacial polymerization for PRO process

HyungKeun Lee,Pravin G. Ingole,KeeHong Kim,HangDae Jo,WonKil Choi 한국에너지학회 2013 한국에너지공학회 학술발표회 Vol.2013 No.5

Development of thin film nanocomposite membranes incorporated with sulfated b-cyclodextrin for water vapor/N2 mixture gas separation

Xinghai An,Pravin G. Ingole,최원길,이형근,홍성욱,전재덕 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.59 No.-

In this work, thin film nanocomposite (TFN) membranes incorporated with sulfated β-cyclodextrin (sb-CD) were fabricated by interfacial polymerization using aliphatic diethylene triamine (DETA) and trimesoyl chloride (TMC) for water vapor separation. Aromatic m-phenylenediamine (MPD) was used for performance comparison with DETA. The intrinsic properties of fabricated TFN membranes were investigated by Attenuated total reflectance-Fourier transformed infrared (ATR-FTIR), field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM) and water contact angle (WCA). The contact angle (35°) of the TFC membranes with DETA was very lower than that (59°) of The TFC with MPD. Moreover, the TFN membrane with sb-CD loading of 0.15 wt% showed the lowest contact angle of 14°, implying that many hydrophilic sulfonic acid groups of sb-CD nanoparticles contributed to decreased contact angle. The effect of sb-CD loading on water vapor permeance and selectivity was studied. Increase in sb-CD loading caused synergistic increase in both permeance and selectivity below the agglomeration point due to its hydrophilic and packable nature. The maximal selectivity of 503 along with 1597 GPU in permeance was obtained with the sb-CD loading of 0.15 wt%. In addition, the structural characteristics were found to have a bigger impact on TFN membrane performance than intrinsic properties.

Water vapor removal using CA/PEG blending materials coated hollow fiber membrane

Kim, KeeHong,Ingole, Pravin G.,Yun, SangHee,Choi, WonKil,Kim, JongHak,Lee, HyungKeun John WileySons, Ltd 2015 Journal of chemical technology and biotechnology Vol.90 No.6

<P><B>Abstract</B></P><P><B>BACKGROUND</B></P><P>In this study, a polyethersulfone composite hollow fiber membrane was used for the separation of water vapor from mixed gas. For improvement of the separation properties, the fabricated membrane was coated with cellulose acetate (CA) and polyethylene glycol (PEG).</P><P><B>RESULTS</B></P><P>Experiments on the permeation of water vapor and N<SUB>2</SUB> gas mixture were performed to observe membrane behavior as a function of the coating conditions, such as the composition and molecular weight of PEG. The water vapor permeance and selectivity of water vapor/N<SUB>2</SUB> improved from 68.5 GPU to 444.1 GPU and from 76.1 to 175.5, respectively, using 5 wt% PEG 2000 blended coating solution.</P><P><B>CONCLUSION</B></P><P>An increase in the PEG content and molecular weight of the coating solution affected the permeance and selectivity due to the hydrophilicity of PEG and the structural changes of the coating layer. © 2014 Society of Chemical Industry</P>

Development of thin film nanocomposite membranes incorporated with sulfated β-cyclodextrin for water vapor/N₂ mixture gas separation

An, Xinghai,Ingole, Pravin G.,Choi, Won-Kil,Lee, Hyung-Keun,Hong, Seong Uk,Jeon, Jae-Deok Elsevier 2018 Journal of industrial and engineering chemistry Vol.59 No.-

<P><B>Abstract</B></P> <P>In this work, thin film nanocomposite (TFN) membranes incorporated with sulfated β-cyclodextrin (sb-CD) were fabricated by interfacial polymerization using aliphatic diethylene triamine (DETA) and trimesoyl chloride (TMC) for water vapor separation. Aromatic <I>m</I>-phenylenediamine (MPD) was used for performance comparison with DETA. The intrinsic properties of fabricated TFN membranes were investigated by Attenuated total reflectance-Fourier transformed infrared (ATR-FTIR), field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM) and water contact angle (WCA). The contact angle (35°) of the TFC membranes with DETA was very lower than that (59°) of The TFC with MPD. Moreover, the TFN membrane with sb-CD loading of 0.15wt% showed the lowest contact angle of 14°, implying that many hydrophilic sulfonic acid groups of sb-CD nanoparticles contributed to decreased contact angle. The effect of sb-CD loading on water vapor permeance and selectivity was studied. Increase in sb-CD loading caused synergistic increase in both permeance and selectivity below the agglomeration point due to its hydrophilic and packable nature. The maximal selectivity of 503 along with 1597 GPU in permeance was obtained with the sb-CD loading of 0.15wt%. In addition, the structural characteristics were found to have a bigger impact on TFN membrane performance than intrinsic properties.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Microporous sulfated β-cyclodextrin (sb-CD) was used for fabricating TFN membranes. </LI> <LI> TFN membranes incorporated with sb-CD exhibited improved permeance and selectivity. </LI> <LI> Diethylene triamine demonstrated a structural advantage over <I>m</I>-phenylenediamine. </LI> <LI> Water vapor separation behavior using TFN membranes highly depends on structural characteristics. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Solid-salt pressure-retarded osmosis with exothermic dissolution energy for sustainable electricity production

Choi, Wook,Bae, Harim,Ingole, Pravin G.,Lee, Hyung Keun,Kwak, Sung Jo,Jeong, Nam Jo,Park, Soon-Chul,Kim, Jong Hak,Lee, Jonghwi,Park, Chul Ho Techno-Press 2015 Membrane water treatment Vol.6 No.2

Salinity gradient power (SGP) systems have strong potential to generate sustainable clean electricity for 24 hours. Here, we introduce a solid-salt pressure-retarded osmosis (PRO) system using crystal salt powders rather than seawater. Solid salts have advantages such as a small storage volume, controllable solubility, high Gibbs dissolution energy, and a single type of water intake, low pretreatment costs. The power densities with 3 M draw solutions were <TEX>$11W/m^2$</TEX> with exothermic energy and <TEX>$8.9W/m^2$</TEX> without at 35 bar using a HTI FO membrane (water permeability <TEX>$A=0.375L\;m^{-2}h^{-1}bar^{-1}$</TEX>). These empirical power densities are ~13% of the theoretical value.

Water vapor transport properties of interfacially polymerized thin film nanocomposite membranes modified with graphene oxide and GO-TiO₂ nanofillers

Baig, Muhammad Irshad,Ingole, Pravin G.,Jeon, Jae-deok,Hong, Seong Uk,Choi, Won Kil,Lee, Hyung Keun Elsevier 2019 CHEMICAL ENGINEERING JOURNAL -LAUSANNE- Vol.373 No.-

<P><B>Abstract</B></P> <P>Graphene oxide (GO) and its composite with TiO<SUB>2</SUB> (GT) were utilized as nano-filler materials to prepare highly permeable and water vapor selective nanocomposite membranes. The nano-fillers were characterized using different analytical tools to determine their physicochemical properties. Nanocomposite membranes were prepared by dispersing the nano-fillers in aqueous phase monomer solution for interfacial polymerization reaction on the inner surface of Polysulfone hollow fiber membrane. Surface morphology and bonding chemistry of the nanocomposite membrane was analyzed using various analytical tools. The two types of nano-fillers were compared for their compatibility with the polyamide matrix, and consequently, the water vapor separation performance of the resulting membrane. Results revealed that both the nano-fillers are firmly attached to the polyamide layer via hydrogen and covalent bonds. GT based membranes have higher surface roughness and better hydrophilicity as compared to GO. In addition, GT membranes have more carboxyl groups and lesser degree of cross-linking due to the interference with interfacial polymerization reaction. This leads to a higher permeance (2820 GPU) and a water vapor/nitrogen selectivity when compared to other TFN membranes reported in literature. The nano-fillers act as active sites for preferential transport of water vapor molecules through the membrane thereby, significantly improving water vapor permeance.</P> <P><B>Highlights</B></P> <P> <UL> <LI> GO and GO-TiO<SUB>2</SUB> nanofillers were incorporated in polyamide nanocomposite membrane. </LI> <LI> Improved water vapor permeance was obtained from GO and GO-TiO<SUB>2</SUB> nanofillers incorporated TFN membranes. </LI> <LI> Highly hydrophilic TFN membranes were obtained for water vapor separation. </LI> <LI> GO-TiO<SUB>2</SUB> shows superior water vapor permeance than GO. </LI> <LI> Functionalized GO could improve water vapor permeation even further. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>GO and GO-TiO<SUB>2</SUB> incorporation in TFN membrane by interfacial polymerization for excellent water vapor separation performance.</P> <P>[DISPLAY OMISSION]</P>

Synthesis of cross-linked amides and esters as thin film composite membrane materials yields permeable and selective material for water vapor/gas separation

Yun, Sang Hee,Ingole, Pravin G.,Choi, Won Kil,Kim, Jong Hak,Lee, Hyung Keun The Royal Society of Chemistry 2015 Journal of Materials Chemistry A Vol.3 No.15

<▼1><P>In this work, 3,5-diaminobenzoic acid (BA) was selected to synthesize polyamide as a selective layer because it is considered desirable to fabricate hydrophilic thin film composite (TFC) membranes for water vapor separation.</P></▼1><▼2><P>In this work, 3,5-diaminobenzoic acid (BA) was selected to synthesize polyamide as a selective layer because it is considered desirable to fabricate hydrophilic thin film composite (TFC) membranes for water vapor separation. Cross-linked chains of TFC membranes by interfacial polymerization were suggested, confirmed and discussed by using the compiled results of characterization, such as ATR-FTIR, XPS, FE-SEM, BET surface area, TGA and water contact angle. As a result, the BA-1-10 membrane (1.0 wt% of BA, 0.2 wt% of TMC and 10 min of reaction time) showed the best permeance and separation factor as 2160 GPU and 23, respectively, compared with other TFC membranes prepared under different conditions. It was shown that with a higher concentration of BA containing carboxylic acid a faster diffusion, greater reactivity and the formation of hydrophobic esters are possible. Moreover, the acyl chloride group (–COCl) of TMC was hydrolyzed to COOH and improved the hydrophilicity for a better sorption of water vapor. However, the hydrophobic esters were generated on a selective layer due to the excessive reaction time over 10 min. It was found that the reaction time should be the same as the immersion time of the aqueous monomer to give adequate high performances.</P></▼2>