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- W4317419458 abstract "With the rapid development of green power grid, polylactic acid (PLA), a biodegradable material, is the basis and forerunner of high and new technology, and has a broad application prospect in power system. In this paper, the effects of thermal aging at 60°C on the electrical and dielectric properties of polylactic acid (PLA) were studied based on the application scenarios of PLA. The polylactic acid after drying was placed in a constant temperature aging chamber, and its macroscopic properties were measured by sampling every other day. It was found that the power strobe flashover voltage of PLA showed a significant rising trend with the increase of heat treatment time, and the breakdown voltage increased by 48% after heat treatment. The relative dielectric constant first increased and then decreased, and the dielectric loss did not change significantly. In this paper, molecular dynamics simulation analysis showed that the -OH and C=C functional groups in the molecular structure of PLA decreased after heat treatment, while C=O increased significantly. It is also found that the increase of the lowest-occupied molecular orbital-highest occupied molecular orbital (LUMO-HOMO) horizontal gap from 12.93 eV to 13.80 eV leads to a significant increase in the breakdown voltage of PLA materials. This study will provide theoretical basis for the application of PLA in complex power grid conditions." @default.
- W4317419458 created "2023-01-19" @default.
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- W4317419458 date "2022-09-25" @default.
- W4317419458 modified "2023-09-23" @default.
- W4317419458 title "Effect of Heat Treatment on Power Frequency Breakdown Voltage and Dielectric Properties of Polylactic Acid" @default.
- W4317419458 cites W1572718985 @default.
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- W4317419458 doi "https://doi.org/10.1109/ichve53725.2022.10014455" @default.
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