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Effective adsorption and separation of lysozyme with PAA-modified Fe3O4@silica core/shell microspheres
- Source :
-
Journal of Colloid & Interface Science . Aug2009, Vol. 336 Issue 2, p526-532. 7p. - Publication Year :
- 2009
-
Abstract
- Abstract: Submicron-size Fe3O4@silica core/shell microspheres were prepared by sol–gel method. Through coating inert silica shell and adjusting the thickness, the dispersibility of magnetic microspheres in water was greatly improved. The resultant Fe3O4@silica microspheres with controllable saturation magnetization between 34.3emu/g and 47.3emu/g were superparamagnetic. All as-prepared magnetic composite microspheres possessed fleetly magnetic responsivity. The PAA-modified Fe3O4@silica microspheres were used for selective adsorption and separation of lysozyme, and the experimental results showed that the maximum binding capacity is about 127mg/g. After surface modification of Fe3O4@silica with polyacrylic acid (PAA) flexible chains, the binding capacity of Fe3O4@silica-g-PAA microspheres for lysozyme were 22 times as much as that of pure Fe3O4@silica microspheres at the same pH condition. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 336
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 42970482
- Full Text :
- https://doi.org/10.1016/j.jcis.2009.02.061