Novel Highly Branched Polyester Nanoparticles(II) -----Interactions Between Anionic HBPN Particles and Cationic Surfactant, Cetyltrimethylammonium Bromide

摘要

The interactions between highly-branched anionic polyester nanoparticles(HBPN) and the oppositely charged surfactant(cetyltrimethylammonium bromide, CTAB) in a buffer(pH=12) were investigated by means of dynamic laser light scattering. Our results indicate that CTAB molecules first from micelles and then the micelles are attracted to the anionic surface of HBPN to from a HBPN/CTAB complex. HBPN anionic surface has provided a certain amount of ions so that CTAB micelles at HBPN surface are more thermodynamically stable.