What is an electrophoretic deposition?

Electrophoretic deposition (EPD) is a method of producing coatings or films on electrically implementing objects or in some cases creating separate components and materials using a process called electrophoresis. This term describes the migration of electrically charged particles in the liquid towards the electrode under the influence of the electric current. Small particles suspended in liquid often have a positive or negative electric charge due to the way their molecules interact with the media. If direct current is applied across suspensions by electrodes, the particles move towards the electrode with the opposite charge. Electrophoresis is commonly used in biochemical analysis and has become an important part of many industrial processes. Depending on the tom, a positive or negative electrode is used, the process can be referred to as anodic or cathodic electrodeposition. If the particles were normally electrically neutral, a compound could be associated with them to provide an electric charge in suspensions. INThe resulting electrical repellation between particles also prevents them from closing together.

This process has many applications, especially in nanotechnology and material science. Unlike electroly, EPD can be used to store a wide range of non -metallic substances, as well as metals, and is a relatively fast and cheap method of using an insulating or protective coating for small electric components. Normally, however, the coating has a higher electrical resistance than the electrode, so as the process continues, the current decreases with increasing resistance. This could set the limits of use.

It is also possible to remove the deposit from the electrode and create a separate object. For example, for storing suspended carbon nanotubes, for example, electrophoretic deposition can be used on an electrode surface and creates a thin film nanotrubic, which can then be separated. Carbon nanotubes are many applications, including thin film solarArticles, fuel cells and touch screens.

Electrophoretic deposition also allows the production of new types of ceramic material. Composite materials can be synthesized using a mixture of suspension, resulting in improving strength or useful electrical properties. Another important application is in functionally graded materials (FGMS); It is possible to create objects composed of two materials, which are usually incompatible, perhaps because of the different extent of thermal expansion, by ensuring a permanent gradient between them rather than a sharp boundary. This is achieved by a change in the composition of the dissolution during the electrophoresis. Laminates composed of alternating layers of different materials can also be made simply by switching between different suspensions.