A superrepellent coating with dynamic fluorine chains for frosting suppression: effects of polarity, coalescence and ice nucleation free energy barrier
A superrepellent coating with dynamic fluorine chains for frosting suppression: effects of polarity, coalescence and ice nucleation free energy barrier
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DOI：
10.1039/c6ra18483a
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发表时间：
2016-09
期刊：
影响因子：
3.9
通讯作者：
Takeo Moriya;Kengo Manabe;Mizuki Tenjimbayashi;Ken Suwabe;Hirotaka Tsuchiya;Takeshi Matsubayashi;W. Navarrini;S. Shiratori
中科院分区：
文献类型：
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作者：
Takeo Moriya;Kengo Manabe;Mizuki Tenjimbayashi;Ken Suwabe;Hirotaka Tsuchiya;Takeshi Matsubayashi;W. Navarrini;S. Shiratori
在人类生活的许多不同领域中，表面上的冰形成在功能、安全性和操作成本方面是一个严重的问题。疏水涂层技术是防止结冰的有效方法之一。以往的研究主要集中在表面结构和表面化学改性对防冰性能的影响。然而，只有少数研究已经阐明了抑制表面上最初形成冰的方法;此外，尚未确定有效的防结霜机制。在这里，疏水光滑的表面涂层，使用低表面能和不同的分子链动力学的三种偶联剂制造。表面粗糙度小于1 nm。与未涂覆的表面相比，碳氟化合物基涂层延迟了结霜，直到−6 °C。从液滴聚并过程中的热交换接触面积、冰核自由能垒、涂层表面的极性和极化率等方面探讨了涂层表面防止结霜的原因以及表面化学改性对抗冻性的影响。
Ice formation on surfaces is a serious issue in many different fields in terms of function, safety, and cost of operation in human life. Hydrophobic coating technology is one of the effective ways to prevent ice formation. Previous studies focused on the effects of surface structure and surface chemical modification on anti-icing ability. However, only a few studies have clarified a method to inhibit the initial formation of ice on surfaces; in addition, an effective mechanism for anti-frosting has not been identified as yet. Here, hydrophobic smooth surface coatings using three coupling agents with low surface energy and different molecular chain dynamics were fabricated. The surface roughnesses were lower than 1 nm. The fluorocarbon-based coatings delayed frost formation compared with the uncoated surface until −6 °C. We explored why the coating surface prevented frost formation and the effects of surface chemical modification on frost resistance from the viewpoint of heat exchange contact area during droplet coalescence, ice nucleation free energy barrier, polarity and polarizability of the coated surface.