Lu Xiaoying, Tan Shuaixia, Zhao Ning, Yang Shuguang, Xu Jian
State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, PR China.
J Colloid Interface Sci. 2007 Jul 1;311(1):186-93. doi: 10.1016/j.jcis.2007.02.066. Epub 2007 Mar 1.
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.
制备了具有陡峭润湿性梯度和高滞后性的低密度聚乙烯（LDPE）表面，在该表面上发现了水滴的独特行为。一滴水滴在疏水性较弱区域的水接触角大于在疏水性较强一端的水接触角，这与一般现象有很大不同。这种独特行为被认为是由LDPE表面的高滞后性和润湿性的急剧变化所诱发的。详细计算并分析了作用在水滴上的驱动力和滞后力。进一步解释了导致这种独特现象的原因。
