Abstract

S. Devikala, P. Kamaraj* and M. Arthanareeswari

DOI : http://dx.doi.org/10.13005/ojc/320461

People may develop a headache, fatigue and even narcosis when the concentration of acetone in air is higher than 10,000 ppm. Hence, detecting and measuring acetone concentrations in the workplace or human body are necessary for our safety and health.  Gas sensors play vital role in detecting, monitoring and controlling the presence of hazardous and poisonous gases in the atmosphere at very low concentrations. In the present work, a thick film of composite was prepared by using PMMA and TiO₂ (PMTi). Then, the composite’s gas sensing behaviour for acetone vapour was tested by measuring the resistance change of the composite at room temperature. An increase in resistance has been observed with a response time of about ten seconds. The PMMA/ TiO₂ (PMTi) composites were characterized by using PXRD, FTIR and SEM. The results show that the thick film of PMTi composite can function as a very good gas sensor for acetone vapours.

PMMA; Polymer composite; gas sensor

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