Background: Traditional organic friction materials are difficult to adapt to people’s growing
technical requirements for stability, safety, comfort and environmental protection in the braking
process. With the rapid development of nanotechnology, the brake’s organic friction materials meet
new opportunities. This article aims to review the research progress of organic friction materials that have applied
Methods: The research progress of nano organic friction materials was reviewed from four aspects in this article. Firstly,
this article outlined the development history of friction materials. Secondly, two preparation methods of the nano organic
friction material were summarized as by nano modifying of matrix material and by adding nanoparticles into friction material.
Thirdly, it was indicated that the nano organic friction material has generally better mechanical, physical properties
and tribological performance than traditional organic friction materials. And the main factors that affect the friction and
wear performance were analyzed. Finally, the main existing problems in this field were summarized.
Results: It was pointed out that the nano organic friction material may be an important developing trend of friction materials.
It was also pointed out that the dispersion of nanoparticles must be a key process during preparation. What is more,
the improvement mechanisms of performance by nano modifying were explained. And it was considered at the end that
the functional friction material with magnetism or self-adsorption may be a leading developoing direction of nano organic
friction materials in the future.
Conclusion: The findings of this review confirm the excellent performance of nano organic friction materials. It is concluded
that the development of a new functional friction material by using the special effect of nanoparticles will be an
important developing trend. Few relevant patents to the topic have been reviewed and cited.