The present invention relates to a water-soluble polymer complex that includes a water-soluble block copolymer and a magnetic nanoparticle, wherein the water-soluble polymer complex has a nonzero net magnetic moment in the absence of an applied magnetic field at ambient temperatures. The water-soluble block copolymer is preferably a diblock or triblock copolymer and the magnetic nanoparticle is preferably a ferrimagnetic or ferromagnetic nanoparticle. The water-soluble complexes may be derivatized with reactive groups and conjugated to biomolecules. Exemplary water-soluble polymer complexes covered under the scope of the invention include PEG112-b-PAA40 modified CoFe2O4; NH2-PEG112-b-PAA40 modified CoFe2O4; PNIPAM68-b-PAA28 modified CoFe2O4; and mPEG-b-PCL-b-PAA modified CoFe2O4.
本发明涉及一种包括
水溶性嵌段共聚物和磁性纳米粒子的
水溶性聚合物复合物,其中
水溶性聚合物复合物在环境温度下无外加磁场时具有非零净磁矩。
水溶性嵌段共聚物最好是二嵌段或三嵌段共聚物,磁性纳米粒子最好是
铁磁性或
铁磁性纳米粒子。
水溶性复合物可以用活性基团衍生并与
生物大分子共轭。本发明范围内的示例性
水溶性聚合物复合物包括 P
EG112-b-P
AA40 改性
CoFe2O4;NH2-P
EG112-b-P
AA40 改性 ;
PNIP
AM68-b-P
AA28 改性 ;以及 mP
EG-b-PCL-b-P
AA 改性 。