[논문]해수담수화용 폴리아마이드 기반 나노복합막의 최신 연구동향

이태훈; 이희대; 박호범

doi:10.14579/membrane_journal.2016.26.5.351

해수담수화용 폴리아마이드 기반 나노복합막의 최신 연구동향
Current Research Trends in Polyamide Based Nanocomposite Membranes for Desalination 원문보기

멤브레인 = Membrane Journal, v.26 no.5, 2016년, pp.351 - 364

이태훈 (한양대학교 에너지공학과) , 이희대 (한양대학교 에너지공학과) , 박호범 (한양대학교 에너지공학과)

초록
AI-Helper

최근 폴리아마이드 선택층에 나노물질을 혼합하여 해수담수화 성능을 높이고자 하는 연구가 활발히 이루어지고 있다. 본 총설은 역삼투 분리막 해수담수화 공정에서의 에너지 효율 향상을 위한 우수한 성능을 가진 폴리아마이드 기반 나노복합막을 소개하고자 한다. 그래핀 옥사이드 및 탄소나노튜브와 같은 탄소나노물질 및 제올라이트, 실리카 나노입자 등의 다양한 나노물질들이 기존 폴리아마이드의 투과분리성능을 높이기 위해 적용되고 있다. 본 총설에서는 최근 연구 중인 각 나노소재별 성능향상 특장점을 소개하고, 더 높은 성능을 갖는 나노복합막 제조를 위한 연구방향을 제시하고자 한다.

Abstract ▼ AI-Helper

In recent decades, many researchers have tried to improve desalination performances of polyamide (PA) thin-film composite membranes (TFCs) by incorporating nanomaterials into a selective PA layer. This review focuses on PA-based nanocomposite membranes with high performances for energy-effective desalination in reverse osmosis. Carbon based nanomaterial (e.g., graphene oxide (GO), carbon nanotubes (CNT)) and/or other nanoparticles (e.g., zeolite, silica and etc.,) were applied to overcome the trade-off correlation between water permeability and salt rejection of current polymeric desalination membranes. Here, this brief review will discuss current studies of PA-based nanocomposite membranes with enhanced separation characteristics and provide the future research direction to achieve further improved desalination performances.

주제어

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제안 방법

5%) at 2000 ppm NaCl, 225 psi condition. Also, this work experimentally demonstrated fast water transport through randomly oriented CNT in PA matrix by using some experiments such as water flux as a function of temperature and applied pressure, and by comparing water flux through closed and/or open ends of CNT-containing PA TFC membranes.

성능/효과

CNT/GO mixture can be well-dispersed in aqueous solution, it could lead to relatively high concentration nanocomposite membranes. As a results, CNT/GO PA TFC membranes showed enhanced water flux (58.96 LMH) with salt rejection (96.21%) related to pristine PA membrane (water flux : 34 LMH, salt rejection : 96.63%) at 2000 ppm NaCl, 15.5 bar and a flow rate condition of 0.5 L/min.
4%. It was found that the water permeability of post-treated TFN membranes with NaY zeolite nanoparticles was more than two times higher than that of pristine TFC membranes.
2 Å)[30]. The experimental results showed that a longer IP reaction time induced a denser zeolite-PA layer and a higher salt rejection could be achieved. A zeolite loading of 0.
(2015) firstly investigated the effects of ZIF-8 incorporation into the PA layer[43]. The experimental results showed that the water permeability significantly improved by 162% with incorporating very small amount of ZIF-8 (0.05 w/v%) with remaining salt rejection. This is attributed to a faster water transport within the hydrophobic framework.
In contrast, in the case of incorporation of the zeolites in the aqueous phase, the salt rejection deteriorated due to the macrovoids observed from SEM and TEM images. This work revealed that the organic phase is a more appropriate solvent for dispersion of the zeolites to fabricate TFN membranes with improved performances.

후속연구

Secondly, surface chemistry between nanomaterial and polymeric support layer have to be studied to make well-deposited and embedded nanomaterial PA mixed matrix at lab-scale as well as industrial application. Finally, more researches are required for characterization techniques and understanding the transport mechanism about PA TFN membranes. Coupling of these researches could lead to develop the advanced TFN membranes with high performances for energy-effective desalination.

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저자의 다른 논문 :

표제어: PCR

동의어: Packet Collision Rate

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용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

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