Coordination Funds

分散体系(颗粒和粉末)的混合是过程工程的一种传统单元操作，在各个技术领域中具有核心地位。混合微粒系统的应用范围从食品、药品和化学物质的加工到材料加工和材料工程。不同颗粒类型的功能混合(异相聚集)有可能创造分散产品的突出新特性，这取决于混合物的组成和各种二次工艺条件(例如团聚、涂层)。在这种情况下，新的产品性质可以从不同颗粒的直接接触(异质接触)中出现，并因此通过相应特定组分之间的结果界面而出现。许多应用表明，这些异质接触对于特定的功能性质具有基本的重要性。在大多数情况下，新的性质是由电荷、质量、热、力或力矩的转移产生的，而不需要其组件的化学反应。因此，这种颗粒混合物的质量与不同颗粒的接触点和界面以及接触中的物种之间相互作用的细节直接相关。来自触点区域的新属性控制整个系统的材料和产品属性，在SPP 2289的上下文中称为异质触点。因此，有关异质接触质量的直接信息(例如，接触数量、不同颗粒类型之间的传输特性)可以作为基本描述颗粒混合物的新特性(混合物的质量和材料功能)的基础。在SPP 2289的前三年，以递归方法为主，其中杂聚体的物质体系适应于过程测量技术和杂聚体及其布居的表征程序。具体重点是：-为确定的异质聚集体的生成建立气溶胶过程，这也可用于检测混合过程的过程诊断，-从快速聚集过程得出颗粒采样序列，-建立层析方法来表征尺寸为1微米的异质聚集体及其描述异质聚集体的数学框架，以及-建立涵盖混合物长度的过程模型和模拟。

Mixing of disperse systems (particles and powders) is a traditional unit operation of process engineering which is of central importance in various technological areas. Applications of mixed particulate systems range from processing of food, pharmaceutical and chemical substances to material processing and materials engineering. Functional mixing of different particle types (hetero-aggregation) has the potential of creating outstanding new properties of dispersed products, which depend on the mixture composition and on various secondary process conditions (e.g. agglomeration, coating). In this context, a new product property can emerge from the direct contact of different particles (hetero-contact) and thus by the resulting interface between the respective particular components. Many applications have shown that these hetero-contacts are of fundamental importance for specific functional properties. In most cases the new properties result from the transfer of charges, mass, heat, forces, or moments without the need of a chemical reaction of its components. Thus, the quality of such a particulate mixture is directly linked to the contact points and interfaces of different particles and the details of the interaction between its species in contact. The new property from the contact zone controls the material and product properties of the entire system that is named hetero-contact in the context of SPP 2289. Direct information about hetero-contact quality (e.g. number of contacts, transport properties between different particle types) could therefore be the base for a fundamental description of the new properties of the particle mixture (quality of the mixture and material function). At the same time, the hetero-aggregation process for creating of such hetero-contacts needs to be investigated and controlled.In the first three years of the SPP 2289 the recursive approach is dominant, in which the material system of the hetero-aggregates is adapted to the process measurement technology and the characterization procedures of hetero-aggregates and their populations. Specific emphases are:- on the establishment of aerosol processes for the defined generation of hetero-aggregates, which can also be adapted to process diagnostics for the detection of mixing processes < 1 µm, - the derivation of particulate sampling trains from fast aggregation processes,- the establishment of tomographic methods for the characterization of hetero aggregates with sizes < 1 µm and - their mathematical framework for the description of hetero-aggregates as well as - the establishment of process models and simulations covering mixture lengths < 1 µm.