直流電圧を用いた微粒子の水面静電吸着と空気清浄フィルタへの応用--IWEC 2025 参加報告 (2025年度 大学院生研究成果国際発信)

This study proposes a novel air purification filter that employs water as a collection electrode. Particulate matter (PM) generated from sources such as factories, automobiles, pollen, and dust poses a serious problem, and conventional electrostatic precipitators face the challenge of re-entrainment of carbon-based PM. The proposed filter captures PM on the water surface through electrostatic forces and prevents re-release into the air by the adhesive interaction between the particles and water, thereby enabling efficient removal. Unlike methods using magnetic fluids, this approach is low-cost and practical, and its extremely low-pressure drop provides excellent energy efficiency. Experimental results demonstrated that the filter effectively collects a wide range of fine particles, while reducing energy consumption since no electric discharge is required. These findings confirm the high efficiency and practical applicability of the proposed filter.