Synthesis of monodisperse, highly ordered polymer foams via milli- and microfluidic techniques

通过毫流控和微流控技术合成单分散、高度有序的聚合物泡沫

• 批准号: 249176000
• 负责人: Professorin Dr. Cosima Stubenrauch
• 金额: --
• 依托单位: Institut für Physikalische Chemie (IPC)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/249176000?language=en
• 关键词: Synthesis; monodisperse; highly; ordered; polymer

Polymer foams are of great commercial interest in such diverse fields as packaging, insulation or impact protection. Depending on its application a polymer foam has to meet specific requirements which can be tailored via the composition and the structure. In the proposed project we would like to study structure-property relationships. To characterise the foam structure a number of details such as pore size, number of pores, pore size distribution and pore connectivity need to be determined. However, the high complexity of traditional manufacturing processes makes it very difficult, often even impossible, to control the structure and thus the properties of the material. Even processes which allow changing the structure of the foam do not allow manufacturing monodisperse and highly ordered polymer foams. All commercially available foams have a broad size distribution, which means that the properties are just the mean of the respective distribution. It is above all the precise control of the structure which will enable us to tailor the properties of polymer foams. To reach this goal new concepts need to be found.The proposed project aims at developing such a new concept. The focus will be on polystyrene foams, keeping in mind, however, that the long-term aim is to transfer this concept to a broad variety of polymer foams. The concept is based on the polymerisation of monodisperse, highly ordered liquid foams and emulsions which are generated via milli- and microfluidic techniques, respectively. The basic idea is to manufacture the desired materials via templates which are easy to make. In one case this will be a styrene-in-water emulsion with a high styrene content which we will foam via the fluidic technique. The subsequent polymerisation of the foamed emulsion is intended to lead to a polystyrene foam whose pore size corresponds to the bubble size of the templating foam. In the second case we will generate a water-in-styrene emulsion which will directly be polymerized. The polymer foam is expected to have pore sizes which correspond to the water droplet size of the templating emulsion. In both cases a redox-initiator will be used to start the radical polymerisation. Once the concept is established, we will develop a route towards a polymer foam with a clearly defined pore size gradient. Last but not least, the mechanical properties of the resulting polymer foams need to be measured. In order to quantify the relation between structure and properties we will compare (a) monodisperse polymer foams of different pore sizes and connectivities, (b) monodisperse polymer foams without and with a pore size gradient, and (c) monodisperse with polydisperse polymer foams.

聚合物泡沫在包装、绝缘或抗冲击等不同领域具有很大的商业价值。根据其应用，聚合物泡沫必须满足特定的要求，这些要求可以通过组合物和结构进行定制。在拟议的项目中，我们想要研究结构-财产关系。为了表征泡沫结构，需要确定一些细节，如孔径、孔数、孔径分布和孔连通性。然而，传统制造工艺的高度复杂性使得控制材料的结构和性能非常困难，通常甚至是不可能的。即使是允许改变泡沫结构的方法也不允许制造单分散和高度有序的聚合物泡沫。所有商业上可用的泡沫都有广泛的尺寸分布，这意味着性能只是各自分布的平均值。最重要的是对结构的精确控制，这将使我们能够定制聚合物泡沫的性能。为了实现这一目标，需要找到新的概念。拟议的项目旨在发展这一新的概念。重点将放在聚苯乙烯泡沫塑料上，但要记住，长期目标是将这一概念转移到各种聚合物泡沫塑料上。这一概念基于单分散、高度有序的液体泡沫和乳液的聚合，这些泡沫和乳液分别通过微流控技术和微流控技术产生。其基本思想是通过易于制作的模板来制造所需的材料。在一种情况下，这将是一种高苯乙烯含量的水包苯乙烯乳液，我们将通过流体技术对其进行发泡。发泡乳液的后续聚合旨在产生其孔大小对应于模板泡沫的气泡大小的聚苯乙烯泡沫塑料。在第二种情况下，我们将产生一种将被直接聚合的苯水乳液。聚合物泡沫的孔大小应与模板乳液的水滴大小相对应。在这两种情况下，都将使用氧化还原引发剂来启动自由基聚合。一旦概念确立，我们将开发一条具有明确定义的孔径梯度的聚合物泡沫的路线。最后但并非最不重要的一点是，需要测量得到的聚合物泡沫的机械性能。为了量化结构和性能之间的关系，我们将比较(A)不同孔径和连接性的单分散聚合物泡沫，(B)没有和有孔径梯度的单分散聚合物泡沫，以及(C)单分散聚合物泡沫。

项目成果

Diving into the Finestructure of Macroporous Polymer Foams Synthesized via Emulsion Templating: A Phase Diagram Study.

• DOI: 10.1021/acs.langmuir.6b03762
• 发表时间: 2017-01
• 期刊: Langmuir : the ACS journal of surfaces and colloids
• 作者: Aggeliki Quell;T. Sottmann;C. Stubenrauch

Toward Functionally Graded Polymer Foams Using Microfluidics

• DOI: 10.1002/adem.201700195
• 发表时间: 2017-08-01
• 期刊: ADVANCED ENGINEERING MATERIALS
• 影响因子: 3.6
• 作者: Elsing, Jonas;Quell, Aggeliki;Stubenrauch, Cosima
• 通讯作者: Stubenrauch, Cosima

How the Locus of Initiation Influences the Morphology and the Pore Connectivity of a Monodisperse Polymer Foam

• DOI: 10.1021/acs.macromol.6b00494
• 发表时间: 2016-07
• 期刊: Macromolecules
• 影响因子: 5.5
• 作者: Aggeliki Quell;Benedetta de Bergolis;W. Drenckhan;C. Stubenrauch

Creating Honeycomb Structures in Porous Polymers by Osmotic Transport.

• DOI: 10.1002/cphc.201600834
• 发表时间: 2017-03
• 期刊: Chemphyschem : a European journal of chemical physics and physical chemistry
• 作者: Aggeliki Quell;S. Heitkam;W. Drenckhan;C. Stubenrauch