| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程系 === 103 === This work points to a relatively easy and convenient two-step process for the sequential synthesis of iron-coating carbon nanoparticles (Fe0@C) and of polystyrene (PS) microparticles with samarium(Ⅲ) oxide (Sm) and Fe0@C.
Fe0@C was synthesized by the chemical reduction method and hydrothermal carbonization method at different ratios of FeCl3‧6H2O and citric acid. The result showed that the ratio of [FeCl3‧6H2O]: [Citric acid] = 1: 5 was better than the others, since iron nanoparticles were homogeneously dispersed in carbon matrix and can be attracted by magnet.
PS microspheres were synthesized by suspension polymerization in water system. The morphology of polystyrene microspheres was observed using optical microscopic and scanning electron microscopic (SEM) studies. When 2,2-azobis-isobutyronitrile (AIBN) of 10 mg was chosen, the PS particles were large in number and were observed as a sphere with a narrow size distribution.
Materials of Sm, PS and Fe0@C were mixed to synthesize PS/Sm and PS/Sm/Fe0@C by polymerization. In thermal gravimetric analysis (TGA), the weight loss curve of PS/Sm showed that after 450 °C, the PS was burned off and PS/Sm weight remained 6.1 %, attributed to the Sm. The morphology of PS/Sm/Fe0@C was similar between optical microscopic images and SEM images. The PS/Sm/Fe0@C particles had a diameter between 20~50 μm, but the smaller particles with amorphous shape coexisted.
According to the research results, PS/Sm/Fe0@C particles should be suitable for using cancer therapy and deliver it to the tumors via its blood supply.
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