Droplet‐based electricity generators (DEGs) are increasingly recognized for their potential in converting renewable energy sources. This study explores the interplay of surface hydrophobicity and stickiness in improving DEG efficiency. It find that the high‐performance C‐WaxDEGs leverage both these properties. Specifically, DEGs incorporating polydimethylsiloxane (PDMS) with carnauba wax (C‐wax) exhibit increased output as surface stickiness decreases. Through experimental comparisons, PDMS with 1wt.% C‐wax demonstrated a significant power output increase from 0.07 to 1.2 W m−2, which attribute to the minimized adhesion between water molecules and the polymer surface, achieved by embedding C‐wax into PDMS surface to form microstructures. This improvement in DEG performance is notable even among samples with similar surface potentials and contact angles, suggesting that C‐wax's primary contribution is in reducing surface stickiness rather than altering other surface properties. The further investigations into the C‐WaxDEG variant with 1wt.% C‐wax PDMS uncover its potential as a sensor for water quality parameters such as temperature, pH, and heavy metal ion concentration. These findings open avenues for the integration of C‐WaxDEGs into flexible electronic devices aimed at environmental monitoring.

中文翻译：

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通过低粘性疏水液滴冲击表面优化基于液滴的发电机


基于液滴的发电机（DEG）因其在转换可再生能源方面的潜力而受到越来越多的认可。本研究探讨了表面疏水性和粘性在提高 DEG 效率方面的相互作用。研究发现高性能 C-WaxDEG 充分利用了这两个特性。具体来说，当表面粘性降低时，将聚二甲基硅氧烷（PDMS）与巴西棕榈蜡（C-wax）结合的DEG表现出产量增加。通过实验比较，含有 1wt.% C-wax 的 PDMS 表现出功率输出显着增加，从 0.07 W m−2 增加到 1.2 W m−2，这归因于通过将 C-wax 嵌入 PDMS 表面来实现水分子与聚合物表面之间的粘附力最小化以形成微观结构。即使在具有相似表面电势​​和接触角的样品中，DEG 性能的这种改进也是显着的，这表明 C-wax 的主要贡献是降低表面粘性而不是改变其他表面特性。对含有 1wt.% C-wax PDMS 的 C-WaxDEG 变体的进一步研究揭示了其作为水质参数传感器的潜力，例如温度、pH 值和重金属离子浓度。这些发现为将 C-WaxDEG 集成到旨在环境监测的柔性电子设备中开辟了道路。