• Membrane Journal
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• v.14 no.4
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• pp.304-311
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• 2004

The poly(1-trimethylsilyl-1-propyne) (PTMSP) and silica-filled PTMSP membranes were prepared by casting from a toluene solution on porous polyetherimide (PEI). FT-IR spectrum, GPC and SEM pictures have been taken to characterize the membranes. The particle size of membrane decreases as silica content of the membrane increases from 23 to 60 wt%, and a uniform distribution of the silica is observed. The separation properties of the gas mixture (32 mol% $H_2$/ 68 mol% $N_2$) through the composite membranes were studies as a function of pressure and percentage of silica. Selectivity values of $H_2$/$N_2$ increased as the pressure of permeation cell and silica content of the membrane increased. The real separation factor($\alpha$), head separation factor($\beta$), and tail separation factor((equation omitted)) of PTMSP-PEI composite membrane were 2.28, 1.58, and 1.44 respectively at $\Delta$P 30 psi and $25^{\circ}C$. $\alpha$, $\beta$, and (equation omitted) of PTMSP-Silica-PEI composite membrane for 60 wt% silica were 3.34, 1.95, 1.72 at $\Delta$P 30 psi and $25^{\circ}C$.

• Membrane Journal
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• v.16 no.2
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• pp.123-132
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• 2006

The PTMSP-silica-PEI composite membranes were synthesized from tetraethoxysilane (TEOS) and poly (1-trimethylsilyl-1-propyne) (PTMSP) by sol-gel process. The PTMSP-silica nanocomposite membranes were characterized by $^1H-NMR$, FT-IR, TGA, XPS, SEM, GPC and gas permeation measurements were accomplished with $H_2,\;O_2,\;N_2,\;CO_2,\;CH_4$. The gases permeability increased with increasing TEOS content. Both the permeability and selectivity of $H_2,\;CH_4$ increased to 15 wt% TEOS. While the permeability of $O_2,\;CO_2$ increased without decrease of selectivity.

• Membrane Journal
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• v.18 no.2
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• pp.146-156
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• 2008

In this study, PTMSP of high permeability and high molecular weight was synthesized, and PTMSP-PDMS graft copolymer was synthesized from poly [1-(trimethylsily)propyne] (PTMSP) and hydroxy-terminated poly(dimethylsiloxane) (PDMS). The PTMSP-PDMS-silica composites were prepared by the addition of 15, 30, or 50 wt% tetraethoxysilane (TEOS) to PTMSP-PDMS graft copolymer by sol-gel process. To investigate the physico-chemical characteristics of PTMSP-PDMS-silica/PEI composite membranes, the analytical methods such as $^1H$-NMR, FT-IR, TGA, XPS, GPC, and SEM have been utilized. The gas permeability and selectivity properties of $H_2,\;O_2,\;N_2,\;CO_2,\;CH_4,\;n-C_4H_{10}$, were evaluated. Permeability of the composite membranes increased as TEOS content and pressure increased. Selectivity of $H_2,\;O_2,\;N_2,\;CO_2,\;CH_4,\;and\;n-C_4H_{10}$, showed the maximum value at 30 wt% of TEOS content and decreased thereafter.

• Proceedings of the Membrane Society of Korea Conference
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• 2005.11a
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• pp.75-78
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• 2005

• Proceedings of the Membrane Society of Korea Conference
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• 2004.05a
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• pp.144-147
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• 2004

Organosilicon polymers have long paid attention as functional polymers [1,2]. Among others, poly- (1-trimethylsilyl-1-propyne) [PTMSP] is a polymer, which forms a gas separating membrane with extraordinary high gas permeability. In particular, composite membranes that constituted two different matrices (inorganic and organic) have been recently developed in order to improve the permeation characteristics.(omitted)