• Preparation of Hollow Fiber NF Membranes by Phase Separation and Pressurization (PSP) Method and Their Performance Studies
  • Kwon SH, Rhim JW
  • 상전이 및 가압법에 의한 나노여과 중공사 복합막의 제조 및 이의 성능 연구
  • 권세환, 임지원
Abstract
A new technique named "phase separation and pressurization" (PSP) was introduced for the preparation of composite membranes by utilizing the salting-out effect. The water-soluble polymers such as poly(styrene sulfonic acid) (PSSA) and polyethylene imine (PEI), were used as the coating materials. Polymer particles formed by the addition of Mg(NO3)26H2O were pressurized and flown to the surface of microporous polyvinylidene fluoride (PVDF) membrane to prepare composite membranes by pore blockings under various conditions. The resulting membranes were characterized in terms of the flux and rejection for 100 ppm NaCl at 4 atm to examine their suitability for application in a household water purifier. The double layer composite membrane prepared by a first coating of PSSA for 4 min and then a second coating of PEI for 2 min showed the best performance with flux of 148.3 LMH and rejection rate of 81.7%.

염석효과를 이용한 "상전이 및 가압법"으로 복합막을 제조하였다. 수용성고분자인 폴리스티렌설폰산(poly(styrene sulfonic acid; PSSA)과 폴리에틸렌이민(polyethylene imine; PEI)을 코팅소재로 사용하였다. 질산마그네슘의 첨가에 의해 생성된 고분자 입자들을 다공성 폴리비닐리덴플루오라이드 막의 표면에서 가압하여 기공 내부로 흘러 들어가게 하여 기공 막힘에 의한 복합막을 여러 실험 조건에서 제조하였다. 제조된 막은 가정용 정수기에 적용 가능성을 알아보고자 4기압 하에서 100 ppm 소금 염용액에 대해 배제율과 투과도의 항으로 특성파악을 수행하였다. PSSA를 4분 동안 그리고 PEI를 2분 동안 코팅한 2중층 코팅 복합막은 배제율 81.7% 그리고 투과도 148.3 LMH를 보여주었다.

Keywords: hollow fiber membrane; nanofiltration; layer-by-layer; salting-out; phase separation

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2024 Impact Factor : 0.6
  • Indexed in SCIE

This Article

  • 2016; 40(2): 290-297

    Published online Mar 25, 2016

  • 10.7317/pk.2016.40.2.290
  • Received on Nov 6, 2015
  • Accepted on Jan 5, 2016