Synthesis and characterization of thermo-sensitive magnetic maghemite nanoparticles

被引：6
|
作者：
Cappelletti, Ariel L. [1 ]
Paez, Julieta I. [1 ]
Strumia, Miriam C. [1 ]
机构：
[1] Univ Nacl Cordoba, Fac Ciencias Quim, Dept Quim Organ IMBIV CONICET, Ciudad Univ, RA-5000 Cordoba, Argentina
来源：
ARKIVOC | 2011年
关键词：
Magnetic nanoparticles; maghemite; thermo-sensitive nanoparticles; poly(N-isopropylacrylamide); SURFACE-PROPERTIES; PHASE-TRANSITION; POLY(N-ISOPROPYLACRYLAMIDE); PARTICLES; HYDROGELS; POLYMERS;
D O I：
10.3998/ark.5550190.0012.735
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
The modification of magnetic nanoparticles (MNPs) with a thermo-sensitive organic shell of poly(N-isopropylacrylamide) (PNIPAm) is reported. The surface of maghemite MNPs was modified in two steps: firstly, using a silane coupling agent and leaving vinyl pending groups on the MNPs surface; and secondly, grafting PNIPAm chains from the modified MNPs via a free radical polymerization. The results indicate that the method developed here for the modification of MNPs is an effective way of synthesizing thermo-responsive MNPs. They present a magnetic behavior due to the maghemite core and a thermal response based on a deswelling/swelling of their polymeric shell (PNIPAm).
引用
收藏
页码：426 / 438
页数：13
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