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.

二氧化钛纳米颗粒有多种用途，例如在防晒霜、废水净化或自清洁涂层中。这些应用中有相当多的应用需要颗粒涂层，例如出于技术或医学原因。因此，用SiO2包覆TiO2粒子具有技术意义。不幸的是，在工艺链中实现涂层前驱体并不容易，而且大多数情况下需要高温。这类涂层步骤还没有系统的研究。在本项目中，TiO2纳米颗粒应包覆厚度可调的SiO2覆盖物。这将在集成反应性冷等离子体（介质阻挡放电- dbd）的两步气溶胶反应器中完成。除了极有前景的技术实现外，该两步法反应器允许对每个工艺步骤中的所有过程和反应进行研究。到目前为止，对DBDs在气溶胶反应器中的包层研究还很少。在这里，我们将高度复杂的表面分析技术与反应器内的连续过程结合起来。本项目的目的是阐明界面和涂层形成的基本机制及其对反应器内涂层过程的反馈。

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