Abstract
Nanodiamonds are novel carbon nanoparticles, which have wide application prospect around various fields owing to the excellent properties. However, nanodiamonds exhibit great tendency to aggregate and this phenomenon extremely limits the application of nanodiamonds. Two simple and green approaches of “grafting from” and “grafting to” are conducted to modify nanodiamonds covalently with copolymer of poly(ϵ-caprolactone) and polyethylene glycol. The characterizations of FT-IR, Raman spectra and TGA indicate that the copolymers are covalently linked on nanodiamonds surface through “grafting from” and “grafting to” methods successfully and the grafting rates are 13.35% and 20.87%, respectively. Moreover, the modified nanodiamonds present smaller particle diameter, less aggregation and better dispersion in organic solvent according to the dynamic light scattering particle size analyzer, transmission electron microscopic analysis and natural sedimentation experiment, which may have potential application at many fields.
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