Homogeneous coating of aerosol-nanoparticles in a cold plasma under atmospheric pressure

大气压下冷等离子体中气溶胶纳米颗粒的均匀涂层

• 批准号: 250830602
• 负责人: Professor Dr. Wolfgang Maus-Friedrichs
• 金额: --
• 依托单位: Institut für Energieforschung und Physikalische Technologien
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/250830602?language=en
• 关键词: Homogeneous; coating; aerosol; nanoparticles; cold

TiO2 nanoparticles are in manifold use for example in sunscreens, in wastewater purification or in self-cleaning coatings. Quite a number of these applications require a particle coating for example from technical or medical reasons. Therefore, the cladding of TiO2 particles with SiO2 is of technological relevance. Unfortunately, the implementation of the coatings precursors into the process chain is not trivial and does mostly require high temperatures. Coating steps of this kind are yet investigated systematically.Within this project TiO2 nanoparticles shall be cladded with SiO2 covers of tunable thicknesses. This will be done in a two-step aerosol reactor with integrated reactive cold plasmas (Dielectric Barrier Discharge-DBD). Beside the highly promising technical realization this two-step reactor allows for the investigations of all processes and reactions in every process step. Up to now the cladding of nanoparticles applying DBDs in aerosol reactors is barely investigated. Here we combine highly sophisticated surface analytical techniques with the continuous processes within the reactor. It is the aim of this project to elucidate the fundamental mechanisms of interface and coating formation and their feedback onto the coating processes inside the reactor.

TiO2纳米颗粒在有歧管中使用，例如在防晒霜，废水纯化或自我清洁涂层中。这些应用中有很多需要粒子涂层，例如从技术或医疗原因出发。因此，具有SIO2的TIO2颗粒的覆层具有技术相关性。不幸的是，将涂料前体的实施在过程链中并不是微不足道的，并且大多需要高温。此类涂层步骤尚未系统地研究。在此项目中，Tio2纳米颗粒应用可调厚度的SIO2覆盖物覆盖。这将在具有反应性冷等离子体（介电屏障排放DBD）的两步气溶胶反应器中进行。除了高度有希望的技术实现之外，这两个步骤反应堆允许在每个过程步骤中对所有过程和反应进行研究。到目前为止，几乎没有研究在气溶胶反应堆中使用DBD的纳米颗粒的覆层。在这里，我们将高度复杂的表面分析技术与反应器中的连续过程相结合。该项目的目的是阐明界面和涂料形成的基本机制及其对反应器内部涂料过程的反馈。

项目成果

Beschichtung von gasgetragenen Nanopartikeln mit SiO2 mithilfe eines plasma-unterstützten CVD-Prozesses bei Umgebungsbedingungen

在环境条件下使用等离子体辅助 CVD 工艺用 SiO2 涂覆气载纳米颗粒

• DOI: 10.1002/cite.201700109
• 发表时间: 2018
• 期刊: Chemie Ingenieur Technik
• 影响因子: 1.9

Mechanical stability measurements of surface modified nanoparticle agglomerates

表面改性纳米颗粒团聚体的机械稳定性测量

• DOI: 10.1016/j.jaerosci.2018.08.007
• 发表时间: 2018
• 期刊: Journal of Aerosol Science
• 影响因子: 4.5
• 作者: Bierwirth