Biologically Inspired Path-Controlled Linear Locomotion of Polymer Gel in Air

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• 作者：Songmiao Liang ; Jian Xu ; Lihui Weng ; Lina Zhang ; Xinglin Guo ; Xiaoli Zhang
• 刊名：Journal of Physical Chemistry B
• 出版年：2007
• 出版时间：February 8, 2007
• 年：2007
• 卷：111
• 期：5
• 页码：941 - 945
• 全文大小：230K
• 年卷期：v.111,no.5(February 8, 2007)
• ISSN：1520-5207

文摘

A novel approach based on electrohydrodynamic behavior of a dielectric liquid pattern in electric field wasdeveloped to fabricate a poly(vinyl alcohol)/dimethyl sulfoxide (PVA/DMSO) gel electromechanical system.Driving experiments indicate that this system could be well-operated in air by using a direct current (DC)electric field, and the gel exhibits a long-range path-controlled snaillike or snakelike motion with a fast crawlingspeed of 14.4 mm/s. Some factors, such as the applied electric field and the mass of the gel on the averagecrawling speed of the gel at linear path and curvilinear path, are investigated. Furthermore, a transition betweensnaillike gaits and snakelike gaits of the gel is also further studied in this system. The mechanism analysissuggests that this path-controlled motion of the gel arises from the drag of the spatial varied shear force Foriginated from the electrohydrodynamic flow of the solvent in and out of the gel.