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KMID : 1151820190130020261
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Journal of the Korean Society of Radiology
2019 Volume.13 No. 2 p.261 ~ p.270
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Separation Permeation Characteristics of N2-O2 Gas in Air at Cell Membrane Model of Skin which Irradiated by High Energy Electron
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Ko In-Ho
Yoe Jin-Dong
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Abstract
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The separation permeation characteristics of N 2 -O 2 gas in air at cell membrane model of skin which irradiated by high energy electron(linac 6 MeV) were investigated. The cell membrane model of skin used in this experiment was a sulfonated polydimethyl siloxane(PDMS) non-porous membrane . The pressure range of N 2 and O 2 gas were appeared from 1 kg f /cm 2 to 6 kg f /cm 2 . In this experiment(temperature 36.5 ℃), the permeation change of N 2 and O 2 gas in non-porous membrane by non-irradiation were found to be 1.19 × 10 -4 - 2.43 × 10 -4 , 1.72 × 10 -4 - 2.6 × 10 -4 cm 3 (STP)/cm 2 ·sec·cmHg, respectively. That of N 2 and O 2 gas in non-porous membrane by irradiation were found to be 0.19 × 10 -4 - 0.56 × 10 -4 , 0.41 × 10 -4 - 0.76 × 10 -4 cm 3 (STP)/cm 2 ·sec·cmHg, respectively. The irradiated membrane was significantly decreased about 4-10 times than membrane which was not irradiated. And ideal separation factor of N 2 and O 2 gas by non-irradiation was found to be from 1.32 to 0.42 and that of N 2 and O 2 gas by irradiation was found to be from 0.237 to 0.125. The irradiated membrane was significantly decreased about 4-5 times than membrane which was not irradiated. When the operation change(cut) and pressure ratio(Pr) by non-irradiation were about 0, One was increased to the oxygen enrichment and the other was decreased to the oxygen enrichment. The irradiated membrane was significantly decreased about 4-19 times than membrane which was not irradiated. As the pressure of N 2 and O 2 gas was increased, the selectivity was decreased. As separation permeation characteristics of N 2 -O 2 gas in cell membrane model of skin were abnormal, cell damages were appeared at cell.
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KEYWORD
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high energy electron, separation characteristics of N2-O2 gas, sulfonated polydimethyl siloxane membrane
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