本論文係關於製備功能性磁性粒子(Functional magnetic particles )並 結合分析磁泳技術(Analytical magnetapheresis)做為生化分離上之應用研 究。主要利用化學共沉澱方法(Co-precipitating)來製備磁性粒子,再對磁 性粒子以高分子修飾粒子表面,所修飾磁性粒子表面之官能基為NH2,最 後採用粒徑分析儀(Photon Correlation Spectroscopy;PCS)、原子力顯微 鏡(Atomic Force Microscope;AFM)、X 射線繞射儀(X-ray diffractometer; XRD)、超導量干涉磁量儀(Superconducting Quantum Interference Device Magnetometor;SQUID)、傅立葉轉換紅外線光譜儀(Fourier Transfer Infrared;FT-IR)鑑定。本研究成功製備40 ± 5 nm、100 ± 8 nm、250 ± 13 nm 及310 ± 25 nm 之Fe3O4 粒子,可在將磁性粒子表面用高分子包覆Fe3O4 其粒徑會有明顯改變,其平均粒徑大小為80 ± 6 nm、204 ± 18 nm、402 ± 40 nm、862 ± 60 nm、1948 ± 130 nm。 再將鏈黴抗生素蛋白(Streptavidin)或免疫球蛋白(IgG)固定在修飾 的四氧化三鐵(Fe3O4)表面上,將蛋白質與磁性顆粒進行共價鍵鍵結;再 將生物素( d-Biotin ) 或蛋白質A( Protein A) 鍵結在聚丙烯酰胺 (polyacrylamide)載體上,使用分析磁泳技術(Analytical magnetapheresis) 做個簡單生化分離上之測試研究。探討磁性載體種類、流速、顆粒數目在 分離上的應用。
Analytical magnetapheresis has become a useful technique for analyzing magnetically susceptible particles. Magnetic particles (Fe3O4) were prepared by co-precipitating. The surface modifications of Fe3O4 were studied with polymer and NH2, , scanning electron microscope (SEM) , photon correlation spectroscopy (PCS) , atomic force microscope (AFM) , x-ray diffraction (XRD) , superconducting quantum interference device magnetometor (SQUID) and fourier transfer infrared instruments (FT-IR) were used for analysis. The sizes of magnetic nanoparticles were : Fe3O4 = 40 ± 5 nm、100 ±8 nm、250 ± 13 nm 及310 ± 25 nm and polymer coated Fe3O4 = 80 ± 6 nm、204 ± 18 nm、402 ± 40 nm、862 ± 60 nm、1948 ± 130 nm . Streptavidin or IgG was bound onto Fe3O4 magnetic nanoparticles. Biotin or Protein A was covalently bound onto polyacrylamide microparticles, and applied to magnetic carries for bioseparation in analytical magnetapheresis. We studied experimental parameters of magnetic particles、flow rate and particles number for analytical magnetapheresis.