PSMA/PEI core-shell nanoparticles with pH indicator for colorimetric CO2 gas detection

Jae Jung Park, Yongsoo Kim, Chanmin Lee, Jun Won Kook, Donghyun Kim, Jung Hyun Kim, Ki Seob Hwang, Jun Young Lee

Research output: Contribution to journalArticlepeer-review


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 (E=15536) and 5 min (E=35645), respectively. The optical CO2 gas sensor was exhibited the largest color change (E=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.

Original languageEnglish
Pages (from-to)664-671
Number of pages8
JournalPolymer (Korea)
Issue number5
Publication statusPublished - 2020 Sept

Bibliographical note

Publisher Copyright:
© 2020 The Polymer Society of Korea. All rights reserved.

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Polymers and Plastics
  • Materials Chemistry


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