Fabrication and characterization of 1 D Fe3O4/P(NIPAM–MAA–MBA) nanochains with thermo- and pH-responsive shell for controlled release for phenolphthalein
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- 作者：Mingliang Ma ; Yong Ma ; Baoliang Zhang ; Hepeng Zhang…
- 刊名：Journal of Materials Science
- 出版年：2015
- 出版时间：April 2015
- 年：2015
- 卷：50
- 期：8
- 页码：3083-3090
- 全文大小：668 KB
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文摘
One-dimensional (1D) Fe3O4/poly(N-isopropylacrylamide-methacrylic acid-N,N--methylenebisacrylamide)(Fe3O4/P(NIPAM–MAA–MBA)) peapod-like nanochains have been successfully synthesized by magnetic field-induced precipitation polymerization. Fe3O4 microspheres modified with vinyl groups can be arranged with the direction of the external magnetic field in a line and linked permanently via P(NIPAM–MAA–MBA) coating during precipitation polymerization. The properties of 1D Fe3O4/P(NIPAM–MAA–MBA) were characterized by transmission electron microscopy, X-ray diffraction, thermogravimetric analysis (TGA), vibrating sample magnetometry, X-ray photoelectron spectroscopy, and UV–Vis spectrophotometer. Magnetic measurement revealed that these 1D peapod-like nanochains showed highly magnetic sensitivity. The thermal- and pH- response of 1D magnetic Fe3O4/P(NIPAM–MAA–MBA) nanochains was investigated by the temperature/pH dependence of hydrodynamic radius of Fe3O4/P(NIPAM–MAA–MBA) microspheres. The release behavior of phenolphthalein from 1D magnetic Fe3O4/P(NIPAM–MAA–MBA) nanochains could be effectively controlled by changing the temperature/pH values.