| 초록 |
We tried to chemically refine diamond nanoparticle (DNP) in polyphosphoric acid (PPA)/phosphorous pentoxide (P2O5) to remove impurities. The wide-angle X-ray diffraction (XRD) showed that the intensity of the characteristic diamond d-spacing (111) at 2.07 from purified DNP (PDNP) was fairly increased compared to pristine DNP. We also carried out the chemical modification of pristine DNP and PDNP with 4-ethylbenzoic acid to afford 4-ethylbenzoyl-functionalized DNP (EBA-g-DNP) and PDNP (EBA-g-PDNP). The resultant functionalized DNP could be useful for nanoscale additives. Hence, we attempt to bromination of EBA-g-DNP and EBA-g-PDNP, respectively, using N-bromosuccinimide (NBS). The α-brominated DNP and PDNP could be used as initiator to introduce many polymers onto the surface of DNP and PDNP via atom transfer radical polymerization (ATRP). |
