Synthesis of Aminated Poly(ether sulfone) as Anion Exchanger and its NO Gas Adsorption

Aminated Poly(ether sulfone)의 합성과 NO 가스의 흡착특성

  • Son, W.K. (Department of Polymer Science & Engineering, Chungnam National University) ;
  • Park, S.G. (Department of Chemical Engineering, Chungbuk National University)
  • Received : 1999.04.27
  • Accepted : 1999.09.06
  • Published : 1999.10.10

Abstract

Aminated poly(ether sulfone)(APES) was prepared by amination of nitrated poly(ether sulfone)(NPES) after poly(ether sulfone)(PES) was nitrated with mixed acid of nitric acid and sulfuric acid(sulfuric acid is a catalyst). As a results of the FT-IR spectrum analysis, the nitration of PES was confirmed by the bands of asymmetric stretching and symmetric stretching of $NO_2$ group at 1537 and $1351cm^{-1}$, respectively. Also when the NPES was aminated, it was disappeared to absorbance peaks of $NO_2$ group. And It was confirmed by the bands of asymmetric stretching and symmetric stretching of $NH_2$ group at 3470 and $3374cm^{-1}$, respectively. The optimum condition of the nitration on PES(5 g; 21.55 mmol.) was 12 hr of reaction time, $120^{\circ}C$ of reaction temperature, nitric acid of 28.00 mmol. and sulfuric acid of 52.00 mmol. As a result of the elemental analysis of APES, reapeating unit per amine groups were induced to 0.89. The adsorption rate of NO gas was lower than that of silica gel and active carbon. But the adsorption capacity of NO gas was higher than that of these. When the APES was absorbed to NO gas, the chemical adsorption rate was lower than the physical adsorption rate. But the chemical adsorption capacity of it was higher than physical adsorption capacity.

Keywords

aminated poly(ether sulfone);anion exchanger;gas adsorption

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