Multiscale crack initiator promoted super-low ice adhesion surfaces,Soft Matter

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Multiscale crack initiator promoted super-low ice adhesion surfaces
Soft Matter ( IF 2.9 ) Pub Date : 2017-08-25 00:00:00 , DOI: 10.1039/c7sm01511a
Zhiwei He _{1,

2,

3,

4,

5} , Senbo Xiao _{1,

2,

3,

4,

5} , Huajian Gao _{6,

7,

8,

9} , Jianying He _{1,

2,

3,

4,

5} , Zhiliang Zhang _{1,

2,

3,

4,

5}

Affiliation

Preventing icing on exposed surfaces is important for life and technology. While suppressing ice nucleation by surface structuring and local confinement is highly desirable and yet to be achieved, a realistic roadmap of icephobicity is to live with ice, but with lowest possible ice adhesion. According to fracture mechanics, the key to lower ice adhesion is to maximize crack driving forces at the ice–substrate interface. Herein, we present a novel integrated macro-crack initiator mechanism combining nano-crack and micro-crack initiators, and demonstrate a new approach to designing super-low ice adhesion surfaces by introducing sub-structures into smooth polydimethylsiloxane coatings. Our design promotes the initiation of macro-cracks and enables the reduction of ice adhesion by at least ∼50% regardless of the curing temperature, weight ratio and size of internal holes, reaching a lowest ice adhesion of 5.7 kPa. The multiscale crack initiator mechanisms provide an unprecedented and versatile strategy towards designing super-low ice adhesion surfaces.

中文翻译：

多尺度裂纹引发剂促进了超低冰粘附表面

防止裸露表面结冰对于生命和技术至关重要。尽管非常希望通过表面结构化和局部封闭来抑制冰核，但仍需实现，但现实的防冰路线图是与冰共存，但要尽可能降低冰的附着力。根据断裂力学，降低冰粘附的关键是使冰-基底界面处的裂纹驱动力最大化。在这里，我们提出了一种新的集成的宏观裂纹引发剂机制，结合了纳米裂纹和微裂纹引发剂，并展示了一种通过将亚结构引入光滑的聚二甲基硅氧烷涂料中来设计超低冰粘附表面的新方法。我们的设计促进了宏观裂纹的产生，并且无论固化温度如何，都能使冰的附着力降低至少约50％，重量比和内部孔的大小，达到5.7 kPa的最低冰附着力。多尺度裂纹引发器机制为设计超低冰粘附表面提供了前所未有的通用策略。

更新日期：2017-09-12

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