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磁性纳米复合颗粒（Fe₃O₄/PVA）/SiO₂的制备与修饰

Synthesis and Modification of Superparamagnetic Nanocompositions（Fe₃O₄/PVA）/SiO₂

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【Author】 GUO Ya-Fei~a,b,WANG Zhi-Fei~b,LI Zhi-Yang~b,HE Nong-Yue~b,SHI Zhi-Yang~c,WANG Hua~c(aSchool of Public Health;bState Key Laboratory of Bioelectronics,Southeast University,Nanjing 210096;cJiangsu Disease Prevention and Control Center,Nanjing)

【机构】东南大学公共卫生学院；东南大学分子电子学国家重点实验室；江苏省疾病控制中心；

【摘要】用三步合成法(共沉淀法、微乳液聚合、St ber过程)制备了(Fe3O4/PVA)/SiO2磁性纳米颗粒,并在颗粒表面进行了醛基化修饰。用TEM对不同工艺获得的颗粒形貌和结构进行了表征。结果表明,中间产物Fe3O4/PVAc颗粒的平均尺寸为100 nm;终产物(Fe3O4/PVA)/SiO2的尺寸在100~500 nm范围内是可调的。醛基化的(Fe3O4/PVA)/SiO2对BSA蛋白具有捕获能力,并且颗粒结合蛋白后具有一定的持久性和耐温性。更多还原

【Abstract】 Nanocompositions(Fe3O4/PVA)/SiO2 have been prepared by three-step method(co-precipi-tation,miniemulsion polymerization,Stber process) and structurally characterized by TEM.According to the image of Fe3O4/PVA/SiO2 by TEM,the morphology is obviously core-shell structure: the average diameter of Fe3O4/PVAc is 100 nm;the diameter of(Fe3O4/PVA)/SiO2 is controllable within a certain range(100～500 nm).And(Fe3O4/PVA)/SiO2-glutaraldehyde can capture BSA within a certain time at a certain tempe-rature.更多还原