writer：Gao, Y.; Zhou, Y. F.*; Yan, D. Y.*
keywords：Titanate nanotube, Temperature sensitive, ATRP
source：期刊
specific source：Polymer 2009, 50, 2572. http://www.sciencedirect.com/science/article/pii/S003238610900319X
Issue time：2009年
Water-soluble titanate nanotubes (TNTs) with temperature-responsive shells were synthesized by grafting poly(N-isopropylacrylamide)
(PNIPAAm) from TNTs via surface atom transfer radical polymerization
(ATRP) using ATRP agent functionalized TNTs as macroinitiator. Proton
Nuclear magnetic resonance spectroscopy (1H NMR),
Fourier-transform infrared (FT-IR) and thermogravimetric analyses (TGA)
results prove the successful graft of PNIPAAm chains from TNTs. TGA
shows that the amount of PNIPAAm grown from the TNTs increased with the
increase of monomer/initiator ratio. Transmission electron microscope
(TEM) measurements displays the obtained TNTs-g-PNIPAAm
nanohybrids have a core–shell structure of TNT cores and PNIPAAm shells.
In addition, the functional nanotubes demonstrate a reversible low
critical solution temperature (LCST) transition with the increase of
solution temperature. The synthetic method presented here can also be
extended to graft other stimuli responsive polymers from TNTs.