PSMA/PEI 코어-쉘 나노입자와 pH Indicator를 활용한 CO2 감지-색변화 검출

박재중; 김용수; 이찬민; 국준원; 김동현; 김중현; 황기섭; 이준영; Jae Jung Park; Yongsoo Kim; Chanmin Lee; Jun-Won Kook; Donghyun Kim; Jung-Hyun Kim; Ki-Seob Hwang; Jun-Young Lee

Polymer(Korea), Vol.44, No.5, 664-671, September, 2020

DOI10.7317/pk.2020.44.5.664 Export Citation

PSMA/PEI 코어-쉘 나노입자와 pH Indicator를 활용한 CO2 감지-색변화 검출

PSMA/PEI Core-Shell Nanoparticles with pH Indicator for Colorimetric CO2 Gas Detection

박재중^{1, 2}, 김용수^{3, 2}, 이찬민², 국준원², 김동현^{1, 2}, 김중현 ¹, 황기섭^{2, †}, 이준영^{2, †}

¹연세대학교 화공생명공학과
²한국생산기술연구원 친환경융합소재연구부문
³성균관대학교 고분자공학과

Jae Jung Park^{1, 2}, Yongsoo Kim^{3, 2}, Chanmin Lee², Jun-Won Kook², Donghyun Kim^{1, 2}, Jung-Hyun Kim¹, Ki-Seob Hwang^{2, †}, and Jun-Young Lee^{2, †}

¹Department of Chemical and Biomolecular Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Korea
²Green and Sustainable Materials R&D Department, Korea Institute of Industrial Technology, 89 Yangdaegiro-gil, Lpjang-myeon, Seobuk-gu, Cheonan-si, Chungcheongnam-do 31056, Korea
³Department of high Polymer Engineering, Sung Kyun Kwan University, 2066 Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 16419, Korea

E-mail:,

초록

본 연구에서는 미량의 CO2 가스를 감지할 수 있는 poly(styrene-co-maleic anhydride)(PSMA)/polyethylene imine(PEI) 코어-쉘 나노 입자 기반의 광학 센서를 제시하였다. 코어인 poly(styrene-co-maleic anhydride)(PSMA) 중합 시 maleic anhydride(MA)의 비율을 20 wt% 투입하여, 입자의 분포도와 크기를 최적화하였으며 PEI를 부가하여 균일한 크기의 코어-쉘 형태의 PSMA/PEI를 제조하였다. CO2 가스 감지 가능한 광학 센서를 제조하기 위해 PSMA 코어에 pH indicator(thymol blue, cresol red 및 phenol red)를 함침하였고 pH indicator의 색 변화 특성이 유지되는 것을 확인하였다. 미량의 CO2 가스(0.1%)가 존재하는 경우 접촉 전의 색과 비교하여 30초 후 thymol blue의 ΔE (colorimetric response)=15536를 나타내며, 5분 후 ΔE=35645까지 증가함을 확인하였다. 이러한 CO2 가스 광학 센서는 30%의 상대 습도에서 가장 큰 색 변화(ΔE=37859)를 나타냈으며, 제시된 코어-쉘 타입 광학 센서는 CO2 가스의 시각화가 가능하며 높은 감도를 통해 다양한 광학 가스 센서 시스템에 적용될 수 있다.

In this study, we developed an optical colorimetric sensor based on poly(styrene-co-maleic anhydride) (PSMA)/ polyethylene imine (PEI) core?shell nanoparticles (PSMA/PEI) for CO2 gas detection. When the contents of MA was 20 wt%, the PSMA had the uniform particle size distribution. Moreover, PSMA/PEI core?shell nanoparticles were prepared by PEI graft. To compose optical colorimetric sensors for CO2 gas detection, PSMA nanoparticles (core part) were prepared and then impregnated with thymol blue, cresol red, and phenol red, respectively. Furthermore, we observed the retention of color change at CO2 gas sensor. In the presence of CO2 gas (0.1%), thymol blue sensors of optical colorimetric changed in 0.5 min (ΔE=15536) and 5 min (ΔE=35645), respectively. The optical CO2 gas sensor was exhibited the largest color change (ΔE=37859) at relative humidity of 30%. Optical CO2 gas sensor of core-shell type would enable variable application of optical gas sensor system with high sensitivity and visualization.

Keywords:core-shell nanoparticle;CO2 sensor;colorimetric sensor;CO2;pH indicator

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Liang PZ, Meng Z, Jiang ZL, Nie J, He Y, J. Polym. Sci. A: Polym. Chem., 48(24), 5652 (2010)

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