Towards a better understanding of the interdiffusion behavior of solution-processed polymer multilayers during drying

更好地理解溶液加工聚合物多层膜在干燥过程中的相互扩散行为

• 批准号: 456056036
• 负责人: Professor Dr.-Ing. Wilhelm Schabel
• 金额: --
• 依托单位: Bereich Thin Film Technology
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/456056036?language=en
• 关键词: Towards; better; understanding; interdiffusion; behavior

For solution-processed polymer multilayer applications, the interaction between the different layers is decisive for the product quality. For the production of polymer multilayers, the individual polymers are either melted and extruded or dissolved in a suitable solvent and applied as a "wet film", whereby the solvent has to be removed in a subsequent drying step. During wet film processing, the solvent can dissolve the subjacent layer and cause polymer interdiffusion between the layers. Depending on the application, layer interdiffusion is a desired phenomenon or should be avoided. For example, for organic light emitting diodes, it is essential to prevent an interdiffusion between the different functional layers to ensure device functionality. In the field of additive manufacturing, the addition of solvent can act as a plasticizer and thus enable processing of polymers with a high glass transition temperature. In this context, the interdiffusion between the layers during solvent evaporation is desired as it plays a major role for the adhesion of the layer-by-layer 3D printed structures.Some excellent theoretical and experimental research has been performed on diffusion processes in polymer-solvent systems and polymer melts, as well as on the drying of polymer-multi-solvent systems. Polymer interdiffusion in solution-processed multilayers during film drying has not been the subject of research efforts so far. The drying kinetics will be of great importance for the prediction of the interdiffusion behavior, since polymer mobility is strongly dependent on the solvent content of the film. To the best of our knowledge, no relevant work has been published on this subject in the literature.With the proposed research project, we aim to close this gap and to develop a fundamental understanding of mass transport processes in polymer double-layers in order to predict and control the interdiffusion of polymer-polymer-solvent systems under defined drying conditions. The investigations will provide an invaluable tool for the production process of polymer multilayer applications in the future.

对于解决方案处理的聚合物多层应用，不同层之间的相互作用对产品质量决定性作用。对于聚合物多层的生产，单个聚合物要么融化，挤出或溶解在合适的溶剂中，并用作“湿膜”，因此必须在随后的干燥步骤中除去溶剂。在湿膜加工过程中，溶剂可以溶解次级层，并在层之间引起聚合物互连。根据应用的不同，层互间是一种期望的现象或应避免。例如，对于有机光发射二极管，必须防止不同功能层之间的扩散以确保设备功能。在添加剂制造领域，添加溶剂可以充当增塑剂，从而使玻璃过渡温度高的聚合物处理。在这种情况下，需要在溶剂蒸发过程中的层之间的相互作用，因为它对于逐层的3D印刷结构的粘附起着主要作用。一些出色的理论和实验研究是在聚合物 - 溶剂 - 溶剂 - 溶剂系统和聚合物融合物中的分散过程中进行的，以及对Polymermermermermermermermermermermermermermermermermermermermermermermermermermermermermermermermermermermermerm solvent of Polymers-Solvent of。到目前为止，在膜干燥过程中，聚合物在胶片干燥过程中的聚合物互化并不是研究工作的主题。干燥动力学对于预测互嵌段行为至关重要，因为聚合物的迁移率很大程度上取决于膜的溶剂含量。据我们所知，在文献中，尚未在此主题上发表过相关的工作。在拟议的研究项目中，我们旨在缩小这一差距，并在固定干燥条件下预测和控制聚合物双层层中对聚合物双层中质量传输过程的基本了解。该调查将为将来的聚合物多层应用程序的生产过程提供宝贵的工具。