Characterization of Poly(N -isopropylacrylamide)
and Magnetic Poly(N -isopropylacrylamide) Latexes
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摘要
Monodisperse poly(N-isopropylacrylamide) (PNIPA) nanogel latexes
with temperature and magnetic field sensitivity were prepared and characterized. The phase transition of
the latex was characterized by dynamic light scattering. Electrokinetic measurements revealed that the
particles have a negative surface charge, which depends on the pH of the swelling medium. Incorporation
of magnetite nanoparticles facilitates the separation of the gel beads and their application in targeted
delivery in an external magnetic field. The incorporation of magnetic material does not modify the temperature
sensitivity of the PNIPA latex.
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关键词
Magnetic particle, Phase transition, Polymer gels, Temperature sensitive latex
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