Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Reverse Osmosis Membrane with High Salt Rejection for Seawater Desalination

해수담수화용 고염제거율 역삼투 분리막 제조

Lee, Yong-Taek;Kim, No-Won
이용택;김노원

  • Published : 20040600
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Abstract

Reverse osmosis membranes with high salt rejection were prepared by interfacial polymerization using aromatic polyfunctional amine, aromatic polyfunctional acyl halide, and various additives such as polar protic solvent. In this study, m-phenylenediamine in aqueous solvent was used as the aromatic polyfunctional amine, and mixture of isophthaloyl chloride and trimesoyl chloride in hydrocarbon solvent was used as the polyfunctional acyl halide in interfacial polymerization. A small dose of polar protic solvent was added to m-phenylenediamine solution as a lubricant. The permeation and separation performance on electrolytic aqueous solution of the membranes have been investigated as a function of concentration of polar protic solvents. As a result, polar protic solvents showed flux enhancement at high concentrations and salt rejection enhancement at low concentrations.

본 연구에서는 방향족 다관능성 아민과 아실 할라이드를 계면중합 시키는 반응에 극성 용매를 첨가하여 염제거율이 향상된 역삼투막을 제조하였다. 방향족 다관능성 아민으로는 메타페닐렌디아민을 수용액 상태로, 방향족 다관능성 아실 할라이드로는 이소프탈로일 클로라이드와 트리메조일 클로라이드를 유기용매에 녹인 용액 상태로 사용하여 계면 중합 반응을 통하여 제조하였다. 소량의 극성 용매가 윤활제로 메타페닐렌디아민 수용액에 첨가되었으며 극성 용매의 농도에 따른 전해질 수용액에 대한 투과 및 분리성능을 조사하였다. 그 결과 극성 용매는 고농도에서 유량 향상을, 저농도에서는 염제거율 향상을 보여준다.

Keywords

References

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