Vol. 125, Issue 2, February 2011, pp.177-186

Ester Sensing with Poly (Aniline-co-m-aminobenzoic Acid) Deposited on Poly (Vinyl Alcohol)

¹S. ADHIKARI, ¹J. SINGH, ²R. BANERJEE and ^1,*P. BANERJI

¹Materials Science Centre, Indian Institute of Technology, Kharagpur 721302, India

²Agricultural and Food Engineering Department, Indian Institute of Technology,
Kharagpur 721302, India

Tel.: +91 3222 283984, fax: +91 3222 255303

^*E-mail: pallab@matsc.iitkgp.ernet.in (P. Banerji)

Received: 23 November 2011   /Accepted: 15 February 2011   /Published: 28 February 2011

Abstract: Poly (aniline-co-m-aminobenzoic acid) was deposited on poly (vinyl alcohol) film by in situ oxidative polymerization of the monomers aniline and m-aminobenzoic acid. Sensing experiments were performed on the composite film with the injection of various concentrations of hexenyl acetate and hexenyl butyrate at room temperature. The sensor responded rapidly and reversibly in the presence of hexenyl acetate and hexenyl butyrate vapors which was detected by resistance change of the composite film upon exposure to the vapor. Selectivity tests revealed that the sensor selectively responded to hexenyl butyrate compared to hexenyl acetate. The sensing response has been explained on the basis of FT-IR spectroscopic analysis of the polymer film before and after exposure to the ester vapor.

Keywords: Polyaniline, Hexenyl acetate, Hexenyl butyrate, Room temperature sensing, FTIR

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