【作者】 李艳； 龙柱；

【Author】 LI Yan LONG Zhu (Laboratory of Pulp and Paper,Jiangnan Univeristy,Wuxi,Jiangsu Province,214122)

【机构】 江南大学纺织服装学院造纸技术研发中心；

【摘要】 用共沉淀法制备Fe₃O₄磁性纳米粒子,并用油酸对其进行表面改性;同时制备羧甲基壳聚糖（CMC）,继而采用反相悬浮法制备CMC磁性微粒。考察了交联剂的种类和m（CMC）:m（改性Fe₃O₄）等条件对制备CMC磁性微粒的影响。应用原子力显微镜、红外谱图、粒径分析仪及磁铁吸附对磁性微粒的形态与特性进行了表征。研究结果表明,在适宜的交联剂和m（CMC）:m（改性Fe₃O₄）等条件下,可以制得单分散性好且磁性明显的平均大小为50 nm×100 nm的长方形CMC磁性微粒。更多还原

【Abstract】 The Fe₃O₄ nano-particles were prepared by co-precipitation method and modified by oleic acid;Then carboxymethyl chitosan magnetic microscopic particles were prepared by inverse suspension method with carboxymethyl chitosan prepared in Lab.The results demonstrated that crosslinker type and the mass ratio of carboxymethyl chitosan and modified Fe₃O₄ were the most effective parameters for the preparation of the microspheres.The AFM,IR and DLS results indicated that the diameter of the microscopic particles was about SO nmxlOO nm and the microscopic particles were uniformly distributed.The magnetic test showed the microscopic particles were magnetic sensitive.更多还原