Pervaporation of organic/water mixtures with hydrophobic silica membranes functionalized by phenyl groups

Araki, Sadao; Imasaka, Satoshi; Tanaka, Shunsuke; Miyake, Yoshikazu

doi:10.1016/j.memsci.2011.06.026

Cited by 36 publications

(27 citation statements)

References 26 publications

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“…The porous α-alumina support (Noritake, Nagoya, Japan) had an average pore size 0.15 mm and average porosity of 40%. The porous α-alumina tube (length¼35 mm) was joined to a dense α-alumina tube (outer diameter¼10 mm, inner diameter¼6 mm, length¼250 mm) and an α-alumina disk (ø¼ 12 mm, thickness¼2 mm) with a glass sealant (GA-13, Nippon Electric Glass) and then calcined at 1373 K [11]. γ-Alumina interlayers are frequently used to form defect-free silica membranes [20][21][22].…”

Section: Preparation Of Hydrophobic Silica Membranesmentioning

confidence: 99%

“…The interaction between membrane materials and the permeate will be an important factor in determining membrane separation performance. The EA flux of a phenyl-functionalized silica membrane prepared from PhTES and TEOS showed a two-fold increase in the flux for MEK despite the small kinetic diameter of MEK (0.504 nm) compared with EA (0.52) [11,13]. There is a high possibility that this difference between the fluxes was caused by differences in the interaction of phenyl-functionalized silica with EA and MEK.…”

Section: Introductionmentioning

confidence: 96%

“…However, polymer membranes are restricted to only certain feed mixtures because of their low chemical stability and thermal stability [2]. Alternatively, zeolite and microporous and mesoporous silica, titania, and zirconia inorganic membranes have been prepared for PV [10][11][12][13][14][15][16][17]. Recently, Kujawa et al prepared hydrophobic alumina and titania membranes by grafting C 6 F 13 C 2 H 4 Si(OEt) 3 (C6) molecules onto the membrane surface.…”

Section: Introductionmentioning

confidence: 99%

“…The membranes were prepared by a molecular template method using cetyltrimethylammonium bromide (CTAB) to form small pores of 1 nm that could separate organic compounds, such as EA, ethyl methyl ketone (MEK), and isopropyl alcohol, from water [11]. The interaction between membrane materials and the permeate will be an important factor in determining membrane separation performance.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Permeation properties of organic compounds from aqueous solutions through hydrophobic silica membranes with different functional groups by pervaporation

Araki

Gondo

Imasaka

et al. 2016

Journal of Membrane Science

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Section: Preparation Of Hydrophobic Silica Membranesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Permeation properties of organic compounds from aqueous solutions through hydrophobic silica membranes with different functional groups by pervaporation

Araki

Gondo

Imasaka

et al. 2016

Journal of Membrane Science

Self Cite

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“…However, for many years, organofunctional silanes have been widely used as coupling agents with an aim to improve the total adhesive strength and aging resistance of organic and inorganic substrates [7][8][9]. One of the coupling agents was PhTES, which has a phenyl group attached to silicone [10]. The phenyl group imparted thermal stability and increased the hydrophobic of the copolymer.…”

Section: Introductionmentioning

confidence: 99%

Study on the synthesis and application of silicone resin containing phenyl group

Kuo

Chen

2015

J Sol-Gel Sci Technol

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Silicone resin containing phenyl group was synthesized by hydrolysis-condensation reaction using tetraethoxysilane (TEOS), chlorotrimethylsilane (TMCS) and phenyltriethoxysilane (PhTES). 1 H-NMR and 29 Si-NMR spectroscopy characterizations also confirmed that silicone resin was successfully obtained based on the combination of TEOS, PhTES and TMCS in a crosslinked network structure. Silicone resin has been thoroughly characterized using gel permeation chromatography, thermogravimetric analysis, ultraviolet-visible spectroscopy, contact angle and softening point measurements. A steady increase in the molecular weight, hydrophobic, softening point and maximum degradation temperature of the silicone resin has been observed with the increasing weight percentage of the PhTES crosslink, but transmittance properties decreased. It has been shown that the non-polar component of the higher contact angle of silicone resin can be increased up to 113°b y 3 % PhTES.Silicone resin applied to silicone pressuresensitive adhesives (SPSA) to increase the hydrophobic indicated a decrease in surface energy, leading to improved wettability for polytetrafluoroethylene. The peel strength of SPSA can be increased up to 8 N/2.5 cm by content PhTES 2 % of silicone resin and increased 54 % without PhTES. Graphical Abstract

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High‐performance PDMS membranes for pervaporative removal of VOCs from water: The role of alkyl grafting

Zhou

Chen

et al. 2016

J of Applied Polymer Sci

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To improve the pervaporation performance of PDMS membrane, alkyl groups with different chain length were grafted into PDMS matrix. The prepared membranes were characterized by ATR-IR, DSC, TGA, PALS, and tensile testing. The effects of alkyl grafting on pervaporation performance of PDMS membrane were investigated in separation of ethyl acetate/water mixture. Experimental results show that the separation factor of PDMS membrane is largely improved by alkyl grafting because of the enhanced preferential sorption of ethyl acetate, and this improvement depends on alkyl grafting ratio and alkyl chain length. The total flux of PDMS membrane reduces after alkyl grafting owing to the decreased free volume. When grafting ratio is above 6.9%, membrane grafted with shorter alkyl groups is preferred for pervaporation. The best pervaporation performance is achieved by 9% octyl grafted PDMS membranes with a separation factor of 592 and a total flux of 188 gm 22 h 21 in separation of 1% ethyl acetate/water mixture at 40 8C. Moreover, this octyl grafted PDMS membrane also exhibits excellent separation performance in removal of butyl acetate, methyl-tert-butyl ether, and n-butanol from water.

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Pervaporation of organic/water mixtures with hydrophobic silica membranes functionalized by phenyl groups

Cited by 36 publications

References 26 publications

Permeation properties of organic compounds from aqueous solutions through hydrophobic silica membranes with different functional groups by pervaporation

Permeation properties of organic compounds from aqueous solutions through hydrophobic silica membranes with different functional groups by pervaporation

Study on the synthesis and application of silicone resin containing phenyl group

High‐performance PDMS membranes for pervaporative removal of VOCs from water: The role of alkyl grafting

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