| Summary: | 碩士 === 中原大學 === 生物醫學工程研究所 === 107 === With the development of technology, conductive polymers have gradually become one of the pioneer in biomedicine research, likewise, the intrinsic properties these polymers comprise extend a large number of applications, such as biosensors and conductive composites. Polypyrrole is a common conductive polymer, it changes resistance with change in thickness, subsequently resulting in different heating characteristics. Therefore, this study evaluated the topography characteristics, electrical properties and electric heating behavior of random and forward conductive spinning fibers, respectively. Here in, the infrared thermal imager was used to measure the thermal response of conductive spinning to further assess the relationship between temperature and time. The photothermal deflection system was used to measure micro calorific value, and the electrically heated platinum electrode was used as heating source of the conductive spinning fiber, instead of traditional heating laser. The gold film photothermal deflection signal was used as the calibration curve, to evaluate the relationship between the micro calorific value and the thermal deflection signal. The results exhibited the forward and random conductive spinning fibers, have stable electric heating properties in terms of temperature response, maximum steady state temperature and electric power, respectively. With increasing thickness of polypyrrole coated on conductive spinning fiber, the resistivity of polycaprolactone/polypyrrole conductive spinning fiber decreased significantly, leading to an increase of the maximum temperature that achieved at constant voltage. In the measurement of micro calorific value, the minimum heating power that can be measured for forward and random conductive spinning fibers was approximately 0.2 mW and 1.0 mW, respectively. The relationship of the photothermal deflection signal and the temperature change (∆T) was linear. In this study, the micro calorific value was measured using the photothermal deflection system. Moreover, the maximum temperature achieved at constant voltage was controlled by changing the thickness of polypyrrole coated on conductive spinning fiber. This study, therefore, has laid the foundation for design applications for the fields of biomedical electrothermal materials in the future.
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