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이온교환 작용기를 갖는 Poly(ether ether ketone): 제조 및 축전식 탈염 효율을 향상시키기 위한 탄소전극 바인더로서의 활용
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한국고분자학회
발행일
2021-07-25
분야분류
IT소재부품, 해외동향, IT부품정보, IT부품정보 네트워크,
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In order to develop polymer binder for use in the fabrication of activated carbon (AC) for capacitive deionization (CDI), we prepared quaternary ammonium group-bearing poly(ether ether ketone) (PEEK) and SO3H-bearing PEEK, and used them as binder in the preparation of AC electrodes. A CDI cell assembled using the electrodes (feed concentration: 500 ppm NaCl, flow rate: 20 mL/min, adsorption: 1.0 V, desorption: 0.0 V), exhibited greatly improved salt removal performance, compared to a cell assembled using the carbon electrodes fabricated from styrene-butadiene rubber as a binder (salt adsorption capacity: 10.1 vs 6.8 mg/g, charge efficiency: 79.8 vs 37.7%). The greatly improved cell performance was attributed to the ion-exchange binders that were well distributed throughout the AC electrodes, leading to selective ion adsorption onto the carbon electrodes during the adsorption steps.