Synthesis of Magnetite Nanoparticles with PDLLA Corona |
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Authors: | Jing Tian Ya Kai Feng Yong Shen Xu |
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Affiliation: | (1) School of Chemical Engineering and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, 300072, People’s Republic of China |
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Abstract: | The ring-opening polymerization (ROP) of D,L-lactide (DLLA) initiated by tin(II) 2-ethylhexanoate (Sn(Oct)2) on the surface-initiated magnetite (Fe3O4) nanoparticles was performed at 130 °C. Effects of the polymer molar mass and concentration on the amount of polymer on the
surface were investigated. The number average molecular weights, M
n
, that we obtained by both nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC) methods fit well within
the accuracy of the applied methods, and range from 1,100 g · mol−1 to 4,040 g · mol−1. The surface functionalization density for up to 3,900 initiation sites per particle was obtained. The composition of various
particles with poly(D,L-lactide) (PDLLA) corona is by means of thermogravimetric analysis (TGA), and indicates magnetite (Fe3O4) content between 17 wt.% and 59 wt.%.
An erratum to this article can be found at |
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Keywords: | D L-lactide PDLLA corona ring-opening polymerization surface-initiated magnetite nanoparticles |
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