Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Angew Chem Int Ed Engl. 2017 Sep 11;56(38):11436-11439. doi: 10.1002/anie.201705190. Epub 2017 Aug 18.
Ice propagation is of great importance to the accumulation of ice/frost on solid surfaces. However, no investigation has been reported on the tuning of ice propagation through a simple coating process. Herein, we study the ice propagation behavior on polyelectrolyte multilayer (PEM) surfaces coated with the layer-by-layer (LBL) deposition approach. We discover that ice propagation is strongly dependent on the amount of water in the outermost layer of PEMs, that is, the ice propagation rate increases with the amount of water in the outermost layer. The ice propagation rate can be tuned by up to three orders of magnitude by changing the polyelectrolyte pairs, counterions of the outermost polymer layer, or the salt concentration during the preparation of PEMs. Because the simple, versatile, and inexpensive LBL deposition approach is generally applicable to almost all available surfaces, the PEM coatings can tune ice propagation on a wide range of substrates.
冰的传播对固体表面上冰/霜的积累非常重要。然而，目前还没有报道通过简单的涂层工艺来调节冰的传播。在本文中，我们研究了通过层层（LBL）沉积方法涂覆的聚电解质多层（PEM）表面上的冰传播行为。我们发现冰的传播强烈依赖于 PEM 最外层的水量，即冰的传播速度随最外层聚合物层的水量增加而增加。通过改变聚电解质对、最外层聚合物层的抗衡离子或 PEM 制备过程中的盐浓度，可以将冰的传播速度调节高达三个数量级。因为简单、通用且廉价的 LBL 沉积方法通常适用于几乎所有可用的表面，所以 PEM 涂层可以在广泛的基底上调节冰的传播。
