OPTICAL BAND GAP AND CONDUCTIVITY MEASUREMENTS OF POLYPYRROLE-CHITOSAN COMPOSITE THIN FILMS

Mahnaz M. Abdi; H.N.M. Ekramul Mahmud; Luqman Chuah Abdullah; Anuar Kassim; Mohamad Zaki Ab. Rahman; Josephine Liew Ying Chyi

doi:10.1007/s10118-012-1093-7

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OPTICAL BAND GAP AND CONDUCTIVITY MEASUREMENTS OF POLYPYRROLE-CHITOSAN COMPOSITE THIN FILMS

Paper | Updated：2023-01-03

- OPTICAL BAND GAP AND CONDUCTIVITY MEASUREMENTS OF POLYPYRROLE-CHITOSAN COMPOSITE THIN FILMS
- Chinese Journal of Polymer Science Vol. 30, Issue 1, Pages: 93-100(2012)
- Affiliations：
  
  a.Laboratory of Biopolymer and Derivatives, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
  b.Department of Chemistry, Faculty of Science, University of Malaya,50603, Kuala Lumpur, Malaysia
  c.Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
  d.Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
- Author bio：
  
  *Mahnaz M. Abdi, E-mail: mahnaz@introp.upm.edu.my
- Funds：
- DOI：10.1007/s10118-012-1093-7
  CLC：
- Received：08 February 2011，
  
  Revised：2011-03-15，
  
  Accepted：21 March 2011，
  
  Published：2012-01
- Accepted：
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Mahnaz M. Abdi, H.N.M. Ekramul Mahmud, Luqman Chuah Abdullah, et al. OPTICAL BAND GAP AND CONDUCTIVITY MEASUREMENTS OF POLYPYRROLE-CHITOSAN COMPOSITE THIN FILMS[J]. Chinese Journal of Polymer Science, 2012, 30(1): 93-100.
DOI：

Mahnaz M. Abdi, H.N.M. Ekramul Mahmud, Luqman Chuah Abdullah, et al. OPTICAL BAND GAP AND CONDUCTIVITY MEASUREMENTS OF POLYPYRROLE-CHITOSAN COMPOSITE THIN FILMS[J]. Chinese Journal of Polymer Science, 2012, 30(1): 93-100. DOI： 10.1007/s10118-012-1093-7.

摘要

Abstract

Electrical conductivity and optical properties of polypyrrole-chitosan (PPy-CHI) conducting polymer composites have been investigated to determine the optical transition characteristics and energy band gap of composite films. The two electrode method and

characteristic technique were used to measure the conductivity of the PPy-CHI thin films

and the optical band gap was obtained from their ultraviolet absorption edges. Depending upon experimental parameter

the optical band gap (

) was found within 1.30–2.32 eV as estimated from optical absorption data. The band gap of the composite films decreased as the CHI content increased. The room temperature electrical conductivity of PPy-CHI thin films was found in the range of 5.84 × 10

-7

-15.25 × 10

-7

S·cm

-1

depending on the chitosan content. The thermogravimetry analysis (TGA) showed that the CHI can improve the thermal stability of PPy-CHI composite films.

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