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用“共沉淀插层-原位复合-溶剂转换”技术合成“右旋糖酐一磁性层状复合氢氧化物一氟尿嘧啶”(dextran - magnetic layered double hydroxide - fluorouracil, DMF )运载系统,通过x射线粉末衍射 (X-ray diffraction, XRD)、红外光谱( infrared spectrum, IR )、透射电镜( transmission electron microsconv. TEM )及热重分析( thermogravimetry, TG )表