Shape-changing polymer micro-origami with fully reprogrammable spatio-temporal folding

具有完全可重新编程时空折叠功能的可变形聚合物微折纸

• 批准号: 424722442
• 负责人: Professor Dr. Andreas Fery
• 金额: --
• 依托单位: Institut Physikalische Chemie und Physik der Polymere
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/424722442?language=en
• 关键词: Shape; changing; polymer; micro; origami

Shape-changing materials are highly promising for design of 3D microelectronics, biomaterials, robotic microsystems and microfluidic systems, smart textiles, optics, to mention just the most prominent examples. Within this field, polymer origami, which relies on structures, which fold in response to external triggers, has turned out as a highly promising approach. However, so far, it still suffers from several fundamental restrictions: • rather than undergoing a programmed sequence of folding events, usually the structures can only switch between a “globally folded” and “globally unfolded” state and • folded or un-folded states cannot always be locked in their folded / unfolded configuration. This project aims to overcome these restrictions and introduce fully flexible programming of folding behavior. Freely programmed folding will be achieved using hydrogel/solid polymer/hydrogel trilayer sandwich, which contain photosensitive nanoparticles. The nanoparticles provide possibility to locally actuate the film by illumination. Two stimuli-responsible hydrogels layers are responsive for bending of the film in different direction. The solid polymer layer with low melting point, which is between hydrogel layers, is responsible for freezing and unfreezing of folding. Our approach will allow combining of advantages of shape-memory polymers with advantages of hydrogels and elimination of their disadvantages. In this project, we will fundamentally understand cooperative interactions of different kinds of shape-changing materials as well as their interaction with externally controlled nanoparticles. The project combines complimentary expertizes of two groups (Ionov and Fery) in shape-changing materials and optically active nanoparticles, as well as polymer/nanoparticle hybrid materials. The project will considerable advance field of shape-changing materials that will allow development of new technologies.

可变形材料在3D微电子、生物材料、机器人微系统和微流体系统、智能纺织品、光学等领域的设计中具有很大的应用前景。在这个领域，聚合物折纸，依靠结构，在外部触发下折叠，已经被证明是一个非常有前途的方法。然而，到目前为止，它仍然受到几个基本的限制：•不是经历一个程序化的折叠事件序列，通常结构只能在“全局折叠”和“全局展开”状态之间切换，•折叠或未折叠状态不能总是锁定在它们的折叠/展开配置中。该项目旨在克服这些限制，并引入折叠行为的完全灵活的编程。使用含有光敏纳米颗粒的水凝胶/固体聚合物/水凝胶三层三明治可以实现自由编程折叠。纳米颗粒提供了通过照明局部驱动薄膜的可能性。两个负责刺激的水凝胶层对膜在不同方向的弯曲有响应。低熔点的固体聚合物层位于水凝胶层之间，负责折叠的冻结和解冻。我们的方法将使形状记忆聚合物的优点与水凝胶的优点相结合，并消除它们的缺点。在这个项目中，我们将从根本上了解不同种类的变形材料的合作相互作用，以及它们与外部控制的纳米颗粒的相互作用。该项目结合了两个小组（Ionov和Fery）在形状变化材料和光学活性纳米颗粒以及聚合物/纳米颗粒混合材料方面的互补专业知识。该项目将极大地推动可变形材料领域的发展，从而促进新技术的发展。