A unique behavior of water drops induced by low-density polyethylene surface with a sharp wettability transition.
A unique behavior of water drops induced by low-density polyethylene surface with a sharp wettability transition.
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DOI：
10.1016/j.jcis.2007.02.066
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发表时间：
2007-07
影响因子：
9.9
通讯作者：
Xiaoying Lu;Shuaixia Tan;N. Zhao;Shuguang Yang;Jian Xu
中科院分区：
文献类型：
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作者：
Xiaoying Lu;Shuaixia Tan;N. Zhao;Shuguang Yang;Jian Xu
制备了一种具有明显润湿性梯度和高迟滞的低密度聚乙烯（LDPE）表面，并在其表面发现了独特的水滴行为。疏水程度较低的一端水滴的水接触角大于疏水程度较高的一端水滴的水接触角，这与一般现象有很大不同。这种独特的行为被认为是由LDPE表面的高迟滞性和润湿性的急剧变化引起的。对作用在水滴上的驱动力和滞后力进行了详细的计算和分析。进一步解释了造成这一独特现象的原因。
A low-density polyethylene (LDPE) surface with a sharp wettability gradient and high hysteresis was prepared, on which a unique behavior of water drops was found. The water contact angle of one water drop on the less hydrophobic region was larger than that on the more hydrophobic end, which was much different from the general phenomenon. The unique behavior is believed to be induced by the high hysteresis of the LDPE surface and the sharp change in wettability. The driving and hysteresis forces acting on the water drops were calculated and analyzed in detail. The reasons resulting to such a unique phenomenon were further explained.