초록 ▼

o MINs 재질의 등방공경 분리막
- 표면 공극률: 상용 트랙-에치 분리막 대비 향상
- 공극(막세공) 크기: 0.04-9 ㎛
- 공극크기분포: isotropic ex) 0.78±0.08 ㎛
- 투수도: 상용 트랙-에치 분리막 대비 향상
- 분획분자량: 공극 크기에 맞는 입자 배제
- 표면에너지: 상용 트랙-에치 분리막 대비 20%저감
- 인장 강도: 상용 트랙-에치 분리막 대비 향상

o MINs 코팅을 이용한 상용막 표면개질
- 바이오파울링 저감
- 스핀코터 및 캐스팅

o MINs 재질의 등방공경 분리막
- 표면 공극률: 상용 트랙-에치 분리막 대비 향상
- 공극(막세공) 크기: 0.04-9 ㎛
- 공극크기분포: isotropic ex) 0.78±0.08 ㎛
- 투수도: 상용 트랙-에치 분리막 대비 향상
- 분획분자량: 공극 크기에 맞는 입자 배제
- 표면에너지: 상용 트랙-에치 분리막 대비 20%저감
- 인장 강도: 상용 트랙-에치 분리막 대비 향상

o MINs 코팅을 이용한 상용막 표면개질
- 바이오파울링 저감
- 스핀코터 및 캐스팅 나이프를 이용한 코팅법 제시
- UV curing 이용한 제조 방법 제시


(출처 : 보고서 요약서 3P)

Abstract ▼

A membrane process for water treatment is one of promising processes for safe drinking water production because of its advantages such as consistent water quality, simple operation and maintenance, small footprint, and so on. To further enhance the efficiency of membrane processes, it is necessary t

A membrane process for water treatment is one of promising processes for safe drinking water production because of its advantages such as consistent water quality, simple operation and maintenance, small footprint, and so on. To further enhance the efficiency of membrane processes, it is necessary to develop novel membranes having better properties than conventional membranes in terms of pore size distribution, porosity, water permeability, strength, anti-fouling, and so on.

Therefore, the goal of this research is to develop the method of fabricating innovative membranes for water treatment by applying MINs, which is a kind of PUA (polyurethane acrylate oligomer), to membrane fabrication. Two approaches were utilized for the goal: one is the fabrication of MF/UF (microfiltration/ultrafiltration) MINs isotropic membranes, and the other is the modification of commercial membranes by MINs coating.

For developing MF membrane fabrication methods by spin-coating, MINs solution was casted on a mold and spin-coated. A replica mold was sometimes prepared using an original mold for the membrane fabrication. Pyramid as well as pillar pattern molds were utilized. When a pyramid pattern mold was used, the pore size of a resulting isotropic membrane was controlled by changing the height of MINs solution on the mold. The spinning rate for coating was optimized by investigating the thickness of membranes as a function of rpm (revolution per minute). For developing MF membrane fabrication methods by a casting knife, a replica mold was also used, and pore size was controlled by changing the height of MINs solution in using a pyramid pattern mold, similarly to the spin-coating case. But, the thickness was regulated by adjusting the height of MINs solution using the casting knife, in this case. The prepared membranes were analyzed in terms of pore size distribution, patterns size, and so on using SEM (scanning electron microscope) and image analysis techniques. Also, the zeta potential, contact angle, and surface energy of the membranes were measured or calculated. Using the developed methods, PVDF (Polyvinylidene fluoride) membranes with various patterns on the surface were also prepared, and the performance as membrane for water treatment was compared. For novel UF membranes, molds were developed by utilizing anodized aluminum oxides or spherical polystyrene particles. UF membranes were fabricated by casting MINs or PES (polyethersulfone) solution on the molds using a casting knife, and analyzed using SEM and AFM (atomic force microscope).

The performance of prepared membranes was investigated in terms of water permeability, particle rejection, tensile strength, and membrane fouling. CFD (computational fluid dynamics) was applied to understanding the reduction in fouling of the developed membranes. Patterned membranes fabricated by spin-coating showed outstanding anti-fouling property at specific conditions, the reason of which was analyzed using CFD. Three dimensional CFD simulated the anti-fouling phenomena more realistically than two-dimensional CFD. Membranes prepared using a casting knife had better properties in terms of pore size distribution, tensile strength, surface energy, and anti-biofouling than a commercial track-etched membrane. The applicability of fabricated membranes to real water treatment was investigated by designing and preparing a demonstration submerged membrane module. It was developed how to prepare UF membranes with similar pore size but different pattern size. Using the membranes, it was found that the enhancement in anti-fouling property depended on the relative size of particle and pattern on membrane surface, which was interpreted using CFD.

Surface-modified membranes were prepared by coating the surface of commercial membranes using MINs. It was possible to control the pore size of the modified membranes by the MINs modification and to enhance anti-biofouling property.


(출처 : SUMMARY 7P)

목차 Contents

• 표지 ... 1
• 제 출 문 ... 2
• 보 고 서 요 약 서 ... 3
• 요 약 문 ... 4
• SUMMARY ... 7
• CONTENTS ... 9
• 목차 ... 12
• 제1장 연구개발과제의 개요 ... 15
• 제1절 최종·단계 연구개발 목표 ... 15
• 1. MF/UF 용 MINs 재질의 등방공경 분리막의 제작 ... 15
• 2. MINs 표면 코팅을 이용한 상용막의 표면개질 ... 15
• 제2절 연구개발 성격 (기술준비도, Technology Readiness Level) ... 15
• 제3절 연차별 연구목표 및 내용 ... 16
• 제2장 국내외 기술개발 현황 ... 17
• 제1절 국내외 연구동향 ... 17
• 제2절 국내외 연구동향 내 연구결과의 위상 ... 18
• 제3장 연구개발수행 내용 및 결과 ... 19
• 제1절 추진전략 ... 19
• 제2절 연구방법 ... 19
• 1. MF/UF 용 MINs 재질의 등방공경 분리막의 제작 ... 19
• 2. MINs 표면 코팅을 이용한 상용막의 표면개질 ... 28
• 제3절 연구개발 내용 및 결과 ... 30
• 1. MF/UF 용 MINs 재질의 등방공경 분리막의 제작 ... 30
• 2. MINs 표면 코팅을 이용한 상용막의 표면개질 ... 66
• 제4절 연구개발성과 ... 74
• 1. 정량적 연구개발 실적 ... 74
• 2. 정성적 대표 연구개발 성과 ... 82
• 제4장 목표달성도 및 관련분야에의 기여도 ... 83
• 제1절 연구개발 목표 및 달성도 ... 83
• 제2절 관련 분야 기술발전에의 기여도 ... 83
• 제5장 연구개발성과의 활용계획 ... 84
• 제1절 추가연구의 필요성 ... 84
• 제2절 다른 연구에의 응용 ... 84
• 제6장 연구개발과정에서 수집한 해외과학기술정보 ... 85
• 제7장 연구시설ㆍ장비 현황 ... 85
• 제8장 참고문헌 ... 85
• 끝페이지 ... 86