超顺磁性海藻酸钠的制备及其结构研究

Synthesis and Formation of Superparamagnetic Alginate

采用氧化法制备巨藻型及海带型超顺磁性海藻酸钠,通过X-衍射、扫描电镜、古埃磁天平分析;结果表明,氧化法生成的磁性离子体达到纳米级(44.66～66.99nm),在海藻酸钠中分布比较均匀,巨藻型海藻酸钠制备的磁性海藻酸钠磁化率比海带型海藻酸钠的高1～2倍.

A Sargassum fluitans alginate and Macrocystis pyrifera alginate with superparamagnetic properties were synthesized via formation of iron oxides inside the polymer matrix. X-ray diffraction, scan electron microscopy （SEM） and magnetic scale were recorded for the characterization of the magnetic phase. The result showed： The samples exhibit superparamagnetic properties due to the presence of ferrimagnetic nanoparticles （44.66～66.99nm）, equably distributed in the alginate matrix; the magnetic ratio of oxidized magnetization Macrocystis pyrifera alginate as 1-2 times as oxidized magnetization Sargassum fluitans alginate.