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- 2017
液态Wood合金在NaOH电解质溶液中的电毛细变形现象
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Abstract:
摘要 本文研究了液态Wood合金在氢氧化钠电解质溶液中，通过施加外电场，进而诱发液态金属电毛细变形的现象. 当石墨电极伸入金属液滴内部时，通电后在金属表面发生的电极反应，促使金属表面形成氧化膜或去除氧化膜. 由于氧化膜与液态金属的表面张力存在巨大差异，通电后电极极性的变化可实现金属液滴形状的快速可逆变形.在液态金属与电解质溶液之间形成的双电子层中，当两侧聚集同极性电荷时将降低界面张力.为维持通电后体系自由能最小，将迫使液体金属增大与溶液之间的界面面积，在宏观上表现为液体金属的变形，由于液态金属与氢氧化钠反应后自身携带负电荷，在电场力的作用下可有效地驱动液态金属在电解质溶液中的运动
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