Synthesis and characterization of carboxyl-functionalized magnetic nanogel via “green” photochemical method
✍ Scribed by Jun Hong; Peijun Gong; Dongmei Xu; Hanwen Sun; Side Yao
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 279 KB
- Volume
- 105
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Abstract
Carboxyl‐functionalized magnetic nanogel was synthesized by facile “green” photochemical method. A possible mechanism of photochemical synthesis was proposed. Effects of irradiation time and volume of monomer dropped on the hydrodynamic diameter of the magnetic nanogel were investigated by photo correlation spectroscopy. The image of atomic force microscopy presented that the magnetic nanogel was with loosed structure. X‐ray diffraction analysis showed that UV irradiation did not induce phase change of Fe~3~O~4~. Superparamagnetic behaviors were retained for Fe~3~O~4~ while slightly reducing the value of saturation magnetization for surface coating. High magnetic content of (as high as 85%) and strong magnetization of Fe~3~O~4~ guaranteed that the magnetic nanogel was susceptive to external applied magnetic field. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007