Nanodiamond powder produced by detonation synthesis is the most promising nanofiller for composites1-2. It is made of diamond particles of ~5 nm in diameter, combining fully accessible surface with a rich and tailorable surface chemistry. Nanodiamond has unique optical, electrical, thermal, and mechanical properties, it is biocompatible and non-toxic. In order to fully benefit from the potential of nanodiamond in nanocomposites, several important issues must be addressed, such as uniformity of nanodiamond dispersion in the matrix, nanodiamond-matrix interface, and the properties of the interphase formed in the vicinity of nanoparticles. These issues can be addressed by different purification, dispersion3, and surface modification strategies. Proper surface chemistry and deaggreagtion strategies improve dispersions of nanodiamond in the matrix. Reactions of nanodiamond functional groups with the matrix can further be used to design a nanofiller-matrix interface and produce a significant volume of the interphase in the composite. The interphase formation depends on how nanodiamond changes the structure of the matrix in the vicinity of the nanoparticle. Incorporation of nanodiamond into composites may improve their mechanical, thermal, electrical, and optical properties for many practical applications.
1. Mochalin, V. N.; Gogotsi, Y., Nanodiamond–polymer composites. Diam. Relat. Mat. 2015, 58, 161-171.
2. Mochalin, V. N.; Shenderova, O.; Ho, D.; Gogotsi, Y., The properties and applications of nanodiamonds. Nature Nanotechnology 2012, 7 (1), 11-23.
3. Turcheniuk, K.; Trecazzi, C.; Deeleepojananan, C.; Mochalin, V. N., Salt-Assisted Ultrasonic Deaggregation of Nanodiamond. ACS Applied Materials & Interfaces 2016, 8 (38), 25461-25468.