研究目的
Investigating the effect of polymeric reticulation on the thermal stability of the piezoelectricity of micro-structured PDMS piezo-electrets for sensor applications.
研究成果
The study demonstrates that the polymeric reticulation ratio significantly affects the piezoelectricity and thermal stability of PDMS piezo-electret materials. A high longitudinal piezoelectric coefficient of 750 pC/N was obtained for the 1:20 ratio, but with poor thermal stability. The 1:10 ratio offered the best thermal stability with a piezoelectric coefficient of 350 pC/N. Future work includes implementing these materials in energy harvester devices.
研究不足
The study is limited to PDMS piezo-electret materials with specific polymeric reticulation ratios and does not explore other materials or ratios. The thermal stability is only tested up to 85 °C.
1：Experimental Design and Method Selection:
The study involved designing, micro-fabricating, and characterizing PDMS piezo-electret materials with various polymeric reticulations. The methodology included dielectric spectroscopy to study the piezoelectric properties.
2：Sample Selection and Data Sources:
Samples were prepared with different ratios of prepolymer to crosslinking agent (1:5, 1:10, 1:15, 1:20) from the PDMS kit Sylgard
3：List of Experimental Equipment and Materials:
1 PDMS kit Sylgard 184, gold electrodes, physical vapor deposition equipment, and dielectric spectroscopy setup.
4：Experimental Procedures and Operational Workflow:
The structures were polarized by a quasi-static triangular voltage, and dielectric measurements were carried out in the range 0.1 Hz–1 MHz for temperatures ranging from ?25 °C to 85 °C.
5：1 Hz–1 MHz for temperatures ranging from ?25 °C to 85 °C.
Data Analysis Methods:
5. Data Analysis Methods: The imaginary part of the complex piezo-electret capacitance was analyzed to study the piezoelectric effect, and the temperature dependence of the longitudinal piezoelectric coefficient was determined.
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