Structure - mechanical property relations of polyelectrolyte multilayer and free-standing membranes

聚电解质多层膜和自支撑膜的结构-机械性能关系

• 批准号: 18470756
• 负责人: Professor Dr. Andreas Fery
• 金额: --
• 依托单位: Lehrstuhl für Angewandte Polymerchemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/18470756?language=en
• 关键词: Structure; mechanical; property; relations; polyelectrolyte

Freestanding membranes with thicknesses on the nanoscale and well defined mechanical properties are valuable model systems for fundamental studies, but are also potentially interesting for applications like sensing or as micromechanical building blocks (switches, valves,...) - In particular polyelectrolyte multilayer membranes (PEMs) are promising in this respect because their thickness can be produced and precisely adjusted in the nanorange, and their compositon can be controlled on the molecular level. It is well known that PEMs can have strongly differing mechanical properties, depending on their molecular scale structure (composition, intramolecular interactions). However a quantitative understanding of these structure property relations is missing so far. In the proposed project, we want to build up freestanding multilayers which are well defined in their structure, in particular in their (ionic and/or covalent) crosslinking densities and hydrophobic interactions between the layer forming molecules and study their mechanical properties. To do so, a comprehensive approach will be made, combining the synthesis of novel, tailored polyelectrolytes for layer buildup with the development of mechanical characterization techniques for the new freestanding polyelectrolyte membranes. This will not only shed light on the static mechanical properties of PEMs, but also provide the basis for understanding and tailoring the responsiveness of these materials towards environmental changes such as of pH and of salt concentration.

自由主义的膜在纳米级上具有厚度和定义明确的机械性能是基本研究的有价值的模型系统，但对于诸如感应或微机械构件（开关，阀门，...）（特别是多电解质）在这种情况下的应用也可能是在这种情况下，并且在这种方面是有望的，因为在这种情况下，它可能会受到调整，因为它们在这种方面受到了易于调整，因为它的厚度可能会受到调整。 Copsiton可以在分子水平上进行控制。众所周知，根据PEM的分子尺度结构（组成，分子内相互作用），PEMS可以具有很大的机械性能。然而，到目前为止，对这些结构的财产关系的定量理解已经缺少。在拟议的项目中，我们希望建立在其结构中良好定义的独立多层，尤其是在其（离子和/或共价）交联密度和层形成分子之间的疏水相互作用并研究其机械性能之间的疏水相互作用。为此，将采用一种全面的方法，结合了新型的，量身定制的聚电解质的合成，用于层堆积，并为新的独立聚电解质膜开发机械表征技术的开发。这不仅可以阐明PEM的静态机械性能，而且还为理解和调整这些材料对环境变化（例如pH和盐浓度）的响应的响应提供了基础。

项目成果

Cross-Linkable Polyelectrolyte Multilayer Films of Tailored Charge Density

具有定制电荷密度的可交联聚电解质多层膜

• DOI: 10.1021/cm903384e
• 发表时间: 2010
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: P. Ott;Patrick;J. Gensel;S. Roesler;K. Trenkenschuh;D. Andreeva;A. Laschewsky;A. Fery
• 通讯作者: A. Fery