Coordination Funds

分散体系（颗粒和粉末）的混合是过程工程的传统单元操作，在各个技术领域都具有核心重要性。混合颗粒系统的应用范围从食品、制药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性混合（异质聚集）具有创造分散产品的突出新特性的潜力，这取决于混合物组成和各种二次加工条件（例如团聚、涂覆）。在这种情况下，不同颗粒的直接接触（异质接触）以及相应特定组分之间的最终界面可以产生新的产品特性。许多应用已经表明，这些异质接触对于特定的功能性质具有根本的重要性。在大多数情况下，新的性质是由电荷、质量、热量、力或力矩的转移产生的，而不需要其组分的化学反应。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其接触物种之间的相互作用的细节直接相关。接触区的新特性控制整个系统的材料和产品特性，在SPP 2289的上下文中称为异质接触。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）可以成为颗粒混合物新特性（混合物质量和材料功能）的基本描述的基础。在SPP 2289的前三年，递归方法占主导地位，其中异质聚集体的材料系统适应异质聚集体及其种群的过程测量技术和表征程序。具体的重点是：-建立气溶胶过程的定义生成的异质聚集体，这也可以适用于过程诊断的检测混合过程< 1微米，-从快速聚集过程的微粒采样列车的推导，-建立层析成像方法的表征尺寸< 1微米的异质聚集体和-他们的数学框架的描述异质聚集体以及-建立过程模型和模拟覆盖混合物长度< 1微米。

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.