Light-triggered polymer diffusion in anisotropic multizone films

各向异性多区薄膜中的光触发聚合物扩散

• 批准号: 201281564
• 负责人: Privatdozent Dr. Claus Duschl, since 10/2016
• 金额: --
• 依托单位: Arbeitsgruppe Weiche Materie an Grenzflächen
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/201281564?language=en
• 关键词: Light; triggered; polymer; diffusion; anisotropic

The project addresses understanding of inter-polymer interactions in anisotropic ionically crosslinked polymer films. The layer-by-layer self-assembly will be employed to create multizone polyelectrolyte films with “liquefied” zones with high polymer mobility separated by “frozen” zones with low polymer mobility presenting a diffusion barrier. The polymer mobility will be tailored by the molecular weight, which allows to keep the chemical composition the same for all zones. The exchange of polymers and externally loaded proteins between “liquefied” zones will be triggered by local interruption of the barrier induced by IR-light. For this purpose, light-responsive microbeads will be integrated into the barrier and will work as diffusion gates, which reversibly collapse at phase transition upon light irradiation. Film structure and mechanical properties, inter-polymer interactions (inter-polyelectrolyte and polyelectrolyte-protein), polymer diffusion, and light response of composite microbeads (pNIPAM-Au@nanorod) will be studied. The mechanism of film formation and fabrication of heterogeneous structures from homogeneous polymer films will be considered. Besides a high impact for fundamental research, in future the films might be employed for (external) control over composition and dynamics in structured polymer networks.

该项目旨在了解各向异性离子交联聚合物薄膜中的聚合物间相互作用。将采用逐层自组装来产生多区域可固化膜，其中具有高聚合物流动性的“液化”区域被具有低聚合物流动性的“冻结”区域隔开，从而呈现扩散屏障。聚合物流动性将根据分子量进行定制，这允许保持所有区域的化学组成相同。聚合物和外部负载的蛋白质在“液化”区域之间的交换将通过IR光诱导的屏障的局部中断来触发。为此，光响应微珠将被整合到屏障中，并将作为扩散门，其在光照射时在相变时可逆地塌陷。研究了复合微球（pNIPAM-Au@nanorod）的膜结构和力学性能、聚合物间相互作用（蛋白质和聚电解质-蛋白质）、聚合物扩散和光响应。薄膜的形成和制造的均匀聚合物薄膜的异质结构的机制将被考虑。除了对基础研究的高度影响外，未来这种薄膜还可能用于对结构化聚合物网络的组成和动力学进行（外部）控制。

项目成果

Communication: Light driven remote control of microgels' size in the presence of photosensitive surfactant: Complete phase diagram.

通讯：在光敏表面活性剂存在的情况下，光驱动远程控制微凝胶的尺寸：完整的相图

• DOI: 10.1063/1.4986143
• 发表时间: 2017
• 期刊: The Journal of chemical physics
• 作者: Schimka;Gordievskaya;Lomadze;Lehmann;von Klitzing;Rumyantsev;Kramarenko;Santer
• 通讯作者: Santer

Temperature effect on the build-up of exponentially growing polyelectrolyte multilayers. An exponential-to-linear transition point.

• DOI: 10.1039/c6cp00345a
• 发表时间: 2016-03
• 期刊: Physical chemistry chemical physics : PCCP
• 作者: A. Vikulina;Y. Anissimov;Prashant Singh;Vladimir Z. Prokopović;K. Uhlig;M. Jaeger;R. von Klitzing;C. Duschl;D. Volodkin

3d localization and diffusion of proteins in polyelectrolyte multilayers

聚电解质多层中蛋白质的 3D 定位和扩散

• DOI: 10.1039/c2sm26500a
• 发表时间: 2012
• 期刊: Soft Matter
• 影响因子: 3.4
• 作者: Madaboosi;Schmidt;Duschl;Volodkin
• 通讯作者: Volodkin