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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