Views: 0 Author: Site Editor Publish Time: 2023-10-26 Origin: Site
The molecules of surfactants are composed of hydrophobic and hydrophilic groups, which can form ordered assembly micelles, reverse micelles, vesicles and so on in solution, and ordered assembly can be used as a "microreactor" to prepare nanoparticles. The surfactant can make the carrier form a directional arrangement, so as to prevent the agglomeration of the nanoparticles, control the size of the nanoparticles, and improve the electrical properties of the electrodes. Surfactants play an important role in the production of battery catalysts, electrode materials, as corrosion inhibitors and battery recycling.
Surfactants play an important role in the production of ion-exchange membrane fuel cell catalysts, and the production method is mainly microemulsion. Microemulsion method includes positive micelle microemulsion system and reverse micelle microemulsion system.
The main disadvantage of the positive micelle microemulsion system is that the particles are difficult to separate and purify from the microemulsion, and then consume a large amount in the production process.
The reverse micelle method is used in the preparation of proton exchange membrane fuel cell electrocatalyst, compared with other chemical methods, the prepared particles are not easy to coalesce, the size is controllable, and the dispersion is good. This method is a kind of nanoparticle preparation method with good development prospect because of its simple equipment and process.
The main functions of surfactants in the preparation of nanoparticles by reverse micelle method are: (1) forming reverse micelle system and controlling particle size; (2) Reduce particle agglomeration; (3) Control the shape and crystal type of particles, etc.