Self-powered humidity sensor based on polypyrrole modified melamine aerogel

Li Xiaoqiang*, Sun Qian, Kan Yan, Zhu Yanan, Pang Zengyuan, Jin Yang, Li Mengjuan, Ioannis S. Chronakis

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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In this study, a self-powered sensor based on polypyrrole modified melamine aerogel (PPy@MA) was developed and evaluated for monitoring constant humidity and flowing moisture. This sensor has a flexible, ultralight and ultraporous structure, and could generate humidity-induced open-circuit voltage from the concentration gradient of the H+ ions. The PPy@MA humidity sensor generated the voltage of 105 mV, when it was placed in an environment with constant humidity of RH 98%. The response and recovery time was 32 s and 13 s, respectively, as the humidity changed between RH 11% and RH 98%. Furthermore, the sensitivity of the self-powered humidity sensor was evaluated by assessing the moisture changes of the human skin, and the moisture from the human breath.

Original languageEnglish
Article number128281
JournalMaterials Letters
Number of pages4
Publication statusPublished - 2020


  • Melamine aerogel
  • Moisture monitoring
  • Polymeric composites
  • Porous materials
  • Self-powered humidity sensor


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