Bioinspired shape-memory graphene film with tunable wettability.
Bioinspired shape-memory graphene film with tunable wettability.
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具有可调润湿性的仿生形状记忆石墨烯薄膜
DOI：
10.1126/sciadv.1700004
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发表时间：
2017-06
期刊：
影响因子：
13.6
通讯作者：
Zhao Y
中科院分区：
文献类型：
--
作者：
Wang J;Sun L;Zou M;Gao W;Liu C;Shang L;Gu Z;Zhao Y
基于注入润滑剂的形状记忆石墨烯海绵，开发了具有可调润湿性的仿生薄膜，用于液体操作。具有特定表面润湿性的功能材料在许多领域发挥着重要作用。受大自然猪笼草的启发，我们提出了一种基于形状记忆石墨烯海绵的新型湿滑薄膜，具有可调节的润湿性。涂有形状记忆聚合物的多孔石墨烯海绵被用来锁住惰性润滑剂，并构建光滑的表面来排斥不同的液体。石墨烯海绵的超弹性、高强度和良好的导电性使石墨烯/聚合物杂化膜具有快速恢复的形状记忆性能。各种液滴可以在表面覆盖润滑剂的压缩膜上滑动，但当形状记忆石墨烯薄膜由于电刺激而反弹时，液滴会被钉住，这导致注入的润滑剂渗透到孔隙中，并暴露出粗糙的地形膜表面。电热动态调谐方法稳定、可逆；因此，形状记忆石墨烯薄膜被赋予了可控制的光滑特性和功能，适用于各种应用，例如微孔板的液体处理。
Bioinspired film with tunable wettability is developed for liquid manipulation based on a lubricant-infused shape-memory graphene sponge. Functional materials with specific surface wettability play an important role in a wide variety of areas. Inspired by nature’s Nepenthes pitcher plant, we present a novel slippery film with tunable wettability based on a shape-memory graphene sponge. The porous graphene sponge coated with shape-memory polymer was used to lock in inert lubricants and construct slippery surfaces to repel different liquids. The superelasticity and high strength, together with good electrical conductivity, of the graphene sponge imparted the graphene/polymer hybrid films with fast recoverable shape-memory properties. Various droplets could slip on the compressed film with a lubricant-covered surface, but the droplets would be pinned when the shape-memory graphene film rebounded due to electrical stimulation, which caused the penetration of the infused lubricant into the pores and the exposure of rough topography film surfaces. The electrothermally dynamic tuning approach was stable and reversible; thus, the shape-memory graphene film was imparted with controlled slippery properties and functions that would be amenable to a variety of applications, such as liquid handling for microplates.