화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.40, No.1, 154-161, January, 2016
DOI10.7317/pk.2016.40.1.154  Export Citation
우수한 열적 특성을 갖는 Copolyimide 한외여과막의 투과 특성
Permeation Properties of Copolyimide UF Membrane with Good Thermal Stability
채동욱, 최현국1, 전종영†
  • 경북대학교 과학기술대학 섬유패션디자인학부
  • 1경북대학교 과학기술대학 나노소재공학부
Doog Wook Chae, Hyun Kuk Choi1, and Jong Young Jeon†
  • School of Textile Engineering & Fashion Design, Kyungpook National University, Sangju, Gyeongbuk 37224, Korea
  • 1School of Nano & Materials Science and Engineering, Kyungpook National University, Sangju, Gyeongbuk 37224, Korea
E-mail:
초록
우수한 열적 특성을 갖는 한외 여과막의 투과 특성을 알아보기 위하여 copoly(bis[4-(3-aminophenoxy)phenyl] sulfone/bis(4-aminophenyl)1,4-diisopropylbenzene/pyromellite) imide(COPI)를 합성하여 상 분리방법으로 분리막을 제조하였다. 제조된 분리막은 운전 온도의 변화에 안정된 순수 투과유속과 용질 배재율을 나타내었다. 순수 투과유속에 대한 poly(ethylene glycol)(MW 2.0×104) 1000 ppm 수용액의 상대 투과 유속은 25 oC에서 90 oC로 운전 온도의 증가와 함께 0.15에서 0.55로 증가하였다. 또한 온도의 증가에 따른 막의 표면의 변화는 일어나지 않았다. 본 연구에서 COPI 한외 여과막은 우수한 열적 안정성을 나타내었으며, 극성 유기용매에 대한 COPI의 가용성으로 다양한 형태의 분리막 제조가 가능함을 알 수 있었다.
Copoly(bis[4-(3-aminophenoxy)phenyl]sulfone/bis(4-aminophenyl 1,4 diisopropylbenzene/pyromellite) imide (COPI) was synthesized using an one-step imidization method. COPI exhibited excellent thermal stability and dissolved well in a number of aprotic polar solvents. COPI was used for the fabrication of membrane materials. COPI ultrafiltration (UF) membranes were prepared using a phase inversion method. Factors influencing the permeation properties and the thermal stability of the membrane were studied. The preparation conditions were determined to be important factors influencing the performance of the membrane. The thermal stability of the membrane was observed by measuring the shrinkage of area and the relative ratio of the permeate flux (Jt)/pure water flux (J0). The relative flux for the poly(ethylene glycol) (MW 2.0×104) aqueous solution increased from 0.15 to 0.55 when temperature increased from 25 to 90 oC, respectively. The area of the membrane was unchanged under varying temperature. The membranes exhibited good thermal stability and were relatively simple to construct.
Keywords:ultrafiltration;membrane;copolyimide;thermal stability;relative flux
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