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Surface Modification of Reverse Osmosis Membrane with Diphenylamine for Improved Chlorine and Fouling Resistance

Diphenylamine에 의해 표면개질된 역삼투막의 내염소성 및 내오염성 향상

  • Kwon, Sei (Department of Chemical Engineering, College of Engineering, Kyung Hee University) ;
  • Jee, Ki Yong (Department of Chemical Engineering, College of Engineering, Kyung Hee University) ;
  • Lee, Yong Taek (Department of Chemical Engineering, College of Engineering, Kyung Hee University)
  • 권세이 (경희대학교 공과대학 화학공학과) ;
  • 지기용 (경희대학교 공과대학 화학공학과) ;
  • 이용택 (경희대학교 공과대학 화학공학과)
  • Received : 2013.10.03
  • Accepted : 2013.12.21
  • Published : 2013.12.31

Abstract

This study investigated the aromatic polyamide reverse osmosis membrane was modified with diphenylamine (DPA) for enhanced chlorine and fouling resistance and how to optimize. DPA has high reactivity and thermo chemical stability. The performance of a modified membranes was investigated and its surface analyzed using atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and contact angle measurement. The experiment was conducted while changing the conditions of temperature and DPA solution concentration.

본 연구는 상용화된 방향족 폴리아미드 역삼투막에 diphenylamine (DPA)을 표면개질 시킴으로써 내염소성과 내오염성이 향상된 역삼투 복합막을 제조하고 최적화시키는 방법에 대해서 연구하였다. 역삼투막의 내염소성과 내오염성을 증가시키기 위해 반응성이 뛰어난 아민(amine)기를 가지고 있고 열적 화학적 안정성이 뛰어난 페닐기 2개가 있는 DPA를 사용하였고, 개질 온도와 시약 농도를 변화시켜가며 개질 조건을 최적화시켰다. XPS, AFM 그리고 contact angle을 이용하여 역삼투막의 표면 개질을 통한 표면 특성 변화를 확인하였으며 역삼투막의 투과성능 평가 결과 역삼투막의 내염소성과 내오염성이 향상된 역삼투 분리막을 제조하였다.

Keywords

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