| 초록 |
We synthesized poly(acrylic acid) modified mesoporous silica nanoparticles(MSNs) to prepare effective pH-responsive nanocarrier. (3-Trimethoxysilyl)propyl methacrylate(TMSPM) functionalized surface was prepared by using post-grafting method, then free-radical polymerization of acrylic acid(AA) was proceeded using potassium persulfate as an initiator. The structure and morphology of the modified nanoparticles were characterized by X-ray diffraction, FT-IR, DLS, SEM, TEM, and N2 adsorption-desorption analysis. The prepared particles have well-ordered mesoporous structure and large pore size and pore volume that is proper as a carrier for guest particles. We studied on the controlled releasing of Rhodamine B(RhB) as a guest molecule. The guest molecules-incorporated MSNs showed different releasing rate of RhB under various pH conditions(pH 7.4, 5.6, 4.0). It demonstrated that our current materials have possibilities to be utilized in catalytic applications, drug delivery and so on. |
