Abstract
This paper is concerned with the development of a cantilever transducer patched with apiezoelectric element for evaluating the characteristics of a temperature-sensitive polymergel membrane. The transducer consists of an aluminum cantilever beam patched with apiezoelectric ceramic and a probe coated by a polymer gel membrane. The probe can beeasily attached to the cantilever transducer with double-sided sticky tape. Thepiezo-cantilever transducer is first simulated with the aid of a finite element methodand the relation between the natural frequency change of the transducer andthe absorbed mass on the polymer gel membrane is obtained theoretically. Formeasuring the temperature characteristics of the polymer gel membrane, theexperiments are conducted in liquid and out of liquid. The temperature-sensitivepoly(N-isopropylacrylamide) gel membrane hydrophilic–hydrophobic characteristics can beexplained clearly by the results. Furthermore, two kinds of membrane coating method wereproposed. The results indicate that the coating gel membrane has a better effect than thepasted gel membrane. The results also show that the piezo-cantilever transducer has apotential application for detecting polymer gel membrane characteristics conveniently andaccurately.
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