Polypyrrole-coated large deformation strain fabric sensor and its properties study

X. Y. Cheng, H. Y J Tsang, Y. Li, M. Y. Leung, Xiaoming Tao, X. X. Cheng, P. Xue, C. W M Yuen

Research output: Journal article publicationConference articleAcademic researchpeer-review

5 Citations (Scopus)


Conductive-polymer coated fabrics have been investigated as intelligent materials in the past years. In this paper, a flexible fabric strain sensor coated with polypyrrole is reported, which is featured with high sensitivity, good stability and large deformation. It is fabricated by chemical vapor deposition at low temperature. The effects of temperature, humidity, acid and alkaline medium have been assessed. The conductivity-strain tests reveal the sensor exhibits a high strain sensitivity of -160 for a deformation as large as 50%, while its good stability is indicated by a small loss of conductivity after the thermal and humidity aging tests, and supported by the slight change in conductivity and sensitivity over a storage of eighteen months. The acid and alkaline solution mainly decreased their initial conductivity but have the slight effect to their sensitivity. The flexible fabric strain sensor is expected to be a promising "soft" smart material in the smart garment, wearable hardware and biomedical applications.
Original languageEnglish
Pages (from-to)127-133
Number of pages7
JournalMaterials Research Society Symposium Proceedings
Publication statusPublished - 29 Sept 2006
Event2006 Materials Research Society Spring Meeting - San Francisco, CA, United States
Duration: 18 Apr 200619 Apr 2006

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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