Study of Prevention of Powder Adhesion on Substrate using Nanoparticle

所述玻璃基板使用浸渍或旋转涂覆方法被二氧化硅纳米颗粒悬浮液涂覆并在电烤箱中干燥。所述玻璃基板表面覆盖纳米颗粒薄层，可在基板上产生透明且微小的凹凸表面。实验证实，在玻璃基板表面覆盖纳米颗粒可以防止粉尘附着。但纳米涂层基材上防止颗粒附着的原因尚不清楚。为此，采用离心法测量了颗粒与基体之间的附着力，并从实验和理论的角度讨论了附着力与表面粗糙度的关系。范德华力的测量和计算结果表明，黏附力随表面粗糙度的增加而减小。结果表明，纳米颗粒涂层可以有效地防止粉尘附着在基材上，纳米颗粒涂层的各种应用是可以预期的。

The glass substrate is coated by the silica nanoparticle suspension using dipping or spin coat method and dried in an electric oven. The glass substrate surface is covered with nanoparticle thin layer and the transparent and tiny rugged surface can be produced on a substrate. It was experimentally confirmed to prevent dust adhesion by covering the surface of the glass substrate with nanoparticle.But the reason why the prevention of particle adhesion on nanoparticle coating substrate is not clear yet. Therefore the adhesion force between particle and substrate is measured by the centrifugal method and the relation between the adhesion force and the surface roughness is discussed from experimental and theoretical point of view. The measured and calculated results by Van der Waals force show that adhesion force decreased with the increment of the surface roughness. From the results, nanoparticle coating is very effective to prevent the dust adhesion on the substrate and the various application of nanoparticle coating can be expected.