Fabrication of Microfibers with Complex Interior by Shape-Changing Polymers

利用变形聚合物制造具有复杂内部结构的微纤维

• 批准号: 396913955
• 负责人: Professor Dr. Leonid Ionov
• 金额: --
• 依托单位: Professur für Biofabrication
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/396913955?language=en
• 关键词: Fabrication; Microfibers; Complex; Interior; Shape

New generation of smart textiles, where signal perception, processing and imaging occurs inside flexible fibers, requires development of methods for fabrication of fibers with high complex inner architectures. This is, however, extremely challenging task. Basing on own experience, we will develop a revolutionary approach for fabrication of such fibers using shape-changing polymers. According to our idea, two polymers (shape-changing and passive one) are first printed on the surface to form a film. The surface of this film can be patterned by using any available method including printing that allows fabrication of almost any multi-layer structure using various kinds of materials. Then the film is transformed into the fiber by its self-rolling due to shape-changing properties of one of the polymers. In this way, 2D pattern on the film surface is transformed in internal elements of the fibers. The central hypothesis of the project is that the desired longitudinal folding behavior of polymer film leading to formation of a fiber can be achieved by transverse orientation of chains of shape-changing polymer. The transverse orientation of the chains can, in its turn, be achieved either by printing of polymer melt at very specific temperature regime, which allows deposition of stretched polymer, or by printing of pre-stretched microfibers of shape-changing polymer. In this project, we will understand fundamental principles of deposition of polymers and polymer microfibers with controlled orientation as well as effects of molecular architecture and chain orientation on folding of the film.

新一代智能纺织品，其中信号感知，处理和成像发生在柔性纤维内，需要开发用于制造具有高度复杂内部结构的纤维的方法。然而，这是一项极具挑战性的任务。根据自己的经验，我们将开发一种革命性的方法来制造这种纤维使用形状变化的聚合物。根据我们的想法，首先将两种聚合物（变形聚合物和被动聚合物）印刷在表面上形成薄膜。该膜的表面可以通过使用任何可用的方法来图案化，包括允许使用各种材料制造几乎任何多层结构的印刷。然后，由于一种聚合物的形状变化特性，膜通过其自卷曲转变成纤维。通过这种方式，薄膜表面上的2D图案在纤维的内部元素中转换。该项目的中心假设是，导致纤维形成的聚合物膜的所需纵向折叠行为可以通过形状变化聚合物链的横向取向来实现。链的横向取向又可以通过在非常特定的温度状态下打印聚合物熔体（其允许拉伸聚合物的沉积）或通过打印形状改变聚合物的预拉伸微纤维来实现。在这个项目中，我们将了解聚合物和聚合物微纤维沉积的基本原理，以及分子结构和链取向对薄膜折叠的影响。