Mechanical Actuation via Homeomorphic Transformations of Topological Solitons within Polymer Coatings,Advanced Materials

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Mechanical Actuation via Homeomorphic Transformations of Topological Solitons within Polymer Coatings
Advanced Materials ( IF 27.4 ) Pub Date : 2023-11-15 , DOI: 10.1002/adma.202308425
Jacques Peixoto _{1,

2} , Darian Hall ₃ , Dirk J Broer _{1,

2} , Ivan I Smalyukh _{3,

4,

5,

6} , Danqing Liu _{1,

2}

Affiliation

Topological solitons are currently under investigation for their exotic properties, especially in nonlinear physics, optics, and material sciences. However, challenges of robust generation and limited stability over time have hindered their practical uses. To address this issue, an approach is developed to form structured arrays of solitons in films of polymerizable liquid crystals. Their complex molecular architecture is preserved by in situ photopolymerization forming a stable liquid crystal network. Most excitingly, their properties are advanced to include responsiveness functions. When thermally actuated, these topological solitons mediate the reconfiguration of surface topographies. Complex shape changes occur depending on the intrinsic complex spatial distribution of the director, which may even lead to full shape inversion and topographical changes as high as ≈40% of the initial thickness. Conversely, the shape changes provide information on the initial director profile, which is consistent with the mathematical model. The soliton-containing polymer coatings are applicable in multiple domains, ranging from tunable optics to haptics, and from shape-coupled sensing systems to temperature-coupled heat management.

中文翻译：

通过聚合物涂层内拓扑孤子的同胚变换进行机械驱动

目前正在研究拓扑孤子的奇异特性，特别是在非线性物理、光学和材料科学领域。然而，随着时间的推移，强大的发电能力和有限的稳定性挑战阻碍了它们的实际使用。为了解决这个问题，开发了一种在可聚合液晶薄膜中形成孤子结构化阵列的方法。它们复杂的分子结构通过原位光聚合形成稳定的液晶网络得以保留。最令人兴奋的是，它们的属性得到了改进，包括响应功能。当热驱动时，这些拓扑孤子会介导表面形貌的重新配置。复杂的形状变化取决于指向矢内在的复杂空间分布，这甚至可能导致全形状反转和高达初始厚度约40%的形貌变化。相反，形状变化提供了有关初始导向器轮廓的信息，这与数学模型一致。含孤子的聚合物涂层适用于多个领域，从可调光学到触觉，从形状耦合传感系统到温度耦合热管理。

更新日期：2023-11-15

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