According to foreign media reports, researchers in the United States and the United Kingdom have discovered a new way to improve paint and coatings by adding "double-sided" nanoparticles. Because this kind of particles absorb water on one surface and repel water on the other surface, they can arrange themselves into a plane and form paint with unusual properties on the surface of the paint.
In Roman mythology, Janus (double-faced god) is the god in charge of time, beginning and ending, so he has two faces-one facing the past and the other facing the future. Therefore, it is not surprising that scientists named this double-sided nanoparticle after him.
Janus particles are spheres covered with different materials, and they have many uses. A study made them into micro-robots, half of which were propelled by chemical reactions, and the other half helped them to remove sewage by making the front antibacterial.
Researchers from Binghamton University in the United Kingdom and Iowa State University in the United States used another type of Janus particles in their new study-half of which are made of hydrophobic materials and the other half are made of hydrophilic materials. to make. In order to explore the possible commercial applications of these nanoparticles, the research team added them to paint.
The researchers pointed out that previous studies focused on the structures formed by these particles on a very small scale, but in this new study, they tried to use these particles to improve the performance of paints and coatings, which was not available before. People have thought of it.
The research team mixed these nanoparticles into paint and then applied them to the surface. To their surprise, they found that the Janus particles formed a complete monolayer-the hydrophilic side stuck to the surface, and the hydrophobic side facing out to the air.
This helps the coating adhere better to the surface and stay firm even when using solvents. The research team also found that even when the paint is a primer, this layer of particles transfers its hydrophobicity to the paint.
The research team said that they are still not completely sure why the Janus particles are arranged in this structure, but they plan to launch new research to design a new generation of "smart" coating materials that are more environmentally friendly and perform better.
Related research reports have been published on "Materials Horizons".
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