Hetero-aggregation of colloidal silica and carbon black in flames

纳米粒子由于其特殊的性质，在工业产品和工艺中普遍存在。巨大的表面积与体积比为独特的颗粒特性创造了物理化学属性。为了使这些特性倍增，可以通过混合粉末或生产多相分散体来生成异质聚集体。气相中的混合为克服混合纳米颗粒粉末的限制提供了机会。这一建议考虑了通过在火焰中与胶体二氧化硅颗粒异质聚集来控制碳黑结构的生成。通过液相合成可以很好地确定二氧化硅的结构。炭黑被用作伙伴系统，以在结构和电化学性质方面产生异质接触。这里，异质聚集体的分散行为和电导率的变化是目标参数。颗粒复合材料的分析考虑了颗粒结构分析技术，如小角X射线散射、HAADF-TEM技术，以及通过测量弥散行为和电导率来分析异质接触质量。优先方案细分为四个研究重点领域。这项建议侧重于“杂化聚集体的制备和形成”以及“杂化接触及其材料功能的表征”。然而，这些结果对其他两个研究领域也很有意义。

Nanoparticles are ubiquitous in industrial products and processes due to their special properties. The enormous surface to volume ratio creates physio-chemical attributes for unique particle characteristics. To multiply these properties hetero-aggregates can be generated by mixtures of powders or the production of multiphase dispersions. The mixing in the gas phase opens up the opportunity to overcome limitations of mixing powders of nanoparticles. This proposal considers the controlled generation of carbon black structures by hetero-aggregation with colloidal silica particles in a flame. The structure of the silica can be well defined by the synthesis in the liquid phase. Carbon black is used as a partner system to create hetero-contacts with regard to structural and electro-chemical properties. Here, changes in the dispersion behavior and the conductivity of the hetero-aggregates are target parameters. The analysis of particle composites considers particle structure analysis techniques such as small angle X-ray scattering, HAADF-TEM techniques as well as the analysis of the hetero-contact quality by measuring the dispersion behavior and the electrical conductivity. The Priority Programme is subdivided in four research focus area. This proposal focuses on the “preparation and formation of hetero-aggregates” as well as the “characterization of the hetero contacts and their material functions”. However, these results are also of great interest for the two other research areas.