Synthesis and Properties of Magnetite/ Polypyrrole Core-Shell Nanoparticles
Date Issued
2005
Date
2005
Author(s)
KE, Jiin-HE
DOI
zh-TW
Abstract
The syntheses of stabilizer, 12-phosphonic acid-dodecyl-2-bromo-2-methyl-propionic ester (PDBME), have been developed. We modified the Fe3O4 nanoparticles by using PDBME and then made the particles able to be an initiator to process polymerizing. Because of the characteristic of PDBME, the Fe3O4 particles would disperse stable in CHCl3, and we utilized the functional group of PDBME to process ATRP, and 1H-NMR and 31P-NMR were used to demonstrate the PDBME.
The growing of poly(t-butyl acrylate) (PtBA) on Fe3O4 surface was processing successfully under the condition, 〔I〕：〔M〕＝1：2500, and we got sets of molecular weights (Mn) through controlling reaction time. Treating the core (Fe3O4) with HCl before GPC measuring and getting molecular weight and polydispersity (PDI) of PtBA. Hydrolysis was taken and water soluble poly(acrylic acid) (PAA) was got, the result was demonstrated by FT-IR.
This synthetic method ensures that each core-shell particle contains only one magnetic particle and that the polymer shell evenly encapsulates the core. Finally, we utilized pyrrole monomer to process in-situ polymerization on PAA chain to get conducting PAA-PPy. Consequently, core (magnetite)- shell (conducting PPy) nanoparticle was made up, and the thus-prepared materials were characterized by NMR, dynamic light scattering, FT-IR, TEM, UV-vis and ESR methods.
Subjects
核殼型奈米粒子
吡
咯
core-shell nanoparticles
pyrrole
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-94-R92549014-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):171635c9bf3aac4c8c4791c876eb5ff1