Pervaporation properties of crosslinked poly(dimethylsiloxane) membranes for the removal of hydrocarbons from water

Ohshima, Tadahiro; Kogami, Yoshihisa; Minakuchi, Masashi; Miyata, Takashi; Uragami, Tadashi

doi:10.1002/polb.20837

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…This is due to the incorporation of OMPS into the epoxy system which enhances the free volume of the hybrid epoxy systems with consequent reduction in the values of T g [20,21] as evidenced by the thermal studies (DSC). The crosslink density of the hybrids can be calculated based on the network theory of rubber elasticity [32,33] and is represented by the equation given below:…”

Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

Synthesis and Characterization of a POSS-Maleimide Precursor for Hybrid Nanocomposites

Jothibasu

Premkumar

Alagar

et al. 2007

High Performance Polymers

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Epoxy-POSS based hybrid nanocomposites are prepared by in situ polymerization of a homogeneous blend of the diglycidylether of bisphenol-A (DGEBA) and 4,4'-diaminodiphenylmethane (DDM) in the presence of octa(maleimidophenyl)silsesquioxane (OMPS). The reaction of a maleimido-functionalised POSS cube with the epoxy resin is studied by Fourier transform infrared (FTIR) analysis and the formation of nanocomposites is confirmed by wide-angle X-ray diffraction (WAXD) and scanning electron microscopy (SEM). Dynamic mechanical analysis (DMA) studies indicate that the crosslinking structures of the nanocomposite networks are predominantly formed 2 between the terminal maleimide double bonds and the amino groups of DDM through a Michael addition reaction to form an aspartimide. The values of the glass transition temperatures (T g ) decrease with increasing POSS-maleimide content and this is likely to be due to the inclusion of POSS cages into the system and consequent increase in free volume. The dynamic thermal stability of the cured polymers is increased by increasing the POSS content in the hybrid epoxy matrices as evidenced from thermogravimetric analysis (TGA) data.

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Section: Dynamic Mechanical Analysis (Dma)mentioning

confidence: 99%

Synthesis and Characterization of a POSS-Maleimide Precursor for Hybrid Nanocomposites

Jothibasu

Premkumar

Alagar

et al. 2007

High Performance Polymers

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“…Sample membranes were cut into circular pieces with a diameter of 36 mm and a thickness of 100 ~ 300 11m. Gas permeabilities of the membranes were measured using the ordinary vacuum method at 30°C with the apparatus, Tsukuba-Rikaseiki K-315N-Ol, where the permeation area was 7.07 cm 2 . The gas permeability coefficients (P, cm 3…”

Section: Measurements Of Gas Permeability Coefficientsmentioning

confidence: 99%

“…Especially, PDMS cross-linked membrane indicates the highly permeability to most gases and organic liquids. In addition, PDMS membrane has been known to exhibit the organic permselectivity in the pervaporation of aqueous organic solutions [1,2]. However, because the PDMS membrane should be prepared by cross-linking, it is difficult to make a thin film to obtain the high flux of permeation.…”

Section: Introductionmentioning

confidence: 99%

Preparations of PDMS-grafted Aromatic Copolyamide Membrane Exhibiting High Durability and Processability

Yun¹,

Saito²,

Yu³

2008

Trans. Mat. Res. Soc. Japan

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The syntheses of siloxane-grafted polyamides were carried out by a macromonomer method, in order to develop a highly permeable and durable membrane material for pervaporation. A novel compounds, 3 ,5-bis(4-aminophenoxy)benzyloxypropyl-terminated polydimethylsiloxane (BAPB-PDMS), and 3,5-bis(4-amino-3-methylphenoxy)benzyloxypropyl-terminated polydimethylsiloxane (BAMPB-PDMS), were synthesized as macromonomers, which consisted of different PDMS segment lengths. The polycondensation of BAPB-PDMSs or BAMPB-PDMSs with terephthaloyl chloride yielded the desired siloxane-grafted polyamide copolymers, PA-g-PDMS and MPA-g-PDMS, respectively. The copolymer membranes were prepared by solvent casting method, and the gas permeability and pervaporation property of these membranes were evaluated. PA-g-PDMS was insoluble in any solvents after the copolymer was dried in vacuo, however, MPA-g-PDMS was soluble in solvents, such as tetrahydrofuran, chloroform and dichloromethane. Therefore, MPA-g-PDMS exhibited the higher processability than PA-g-PDMS. The gas permeability coefficients of these copolymer membranes were increased as increase of PDMS segment length, and these values of MPA-g-PDMS were slightly higher than those of PA-g-PDMS containing the same PDMS segment length. From the results of pervaporations of the dilute aqueous solutions of organic solvents, it was found that both of PA-g-PDMS and MPA-g-PDMS exhibited the excellent permselectivity toward several organic solvents, such as alcohols, acetone, tetrahydrofuran, chloroform, dichloromethane and benzene with a high and stable permeation.

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Pervaporation

2017

Science and Technology of Separation Membranes

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Pervaporation properties of crosslinked poly(dimethylsiloxane) membranes for the removal of hydrocarbons from water

Cited by 7 publications

References 35 publications

Synthesis and Characterization of a POSS-Maleimide Precursor for Hybrid Nanocomposites

Synthesis and Characterization of a POSS-Maleimide Precursor for Hybrid Nanocomposites

Preparations of PDMS-grafted Aromatic Copolyamide Membrane Exhibiting High Durability and Processability

Pervaporation

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