| 초록 |
Halloysite clay nanotubes have great attention due to the promising applications such as drug delivery, chemical carriers, and biomaterials. Even though they have a lot of benefits, their surface charges close to neutral states generate aggregation that limits further improvement for the applications. In this study, mono-dispersed halloysite solutions were successfully prepared by pH controls, and they were used to probe the charged polymer systems: poly(styrene sulfonate) (PSS) and poly(allylamine) (PAH). The structure of a single nanotube shapes was estimated with polarized/depolarized dynamic light scattering and small angle X-ray scattering measurements. Furthermore, the probe diffusion of halloysite was investigated in various polymer concentrations. We observed chain conformational characteristics upon concentrations of polyelectrolytes and discussed depletion stabilization and depletion flocculation that support the particle stability. |
