期刊
POLYMER
卷 50, 期 12, 页码 2572-2577出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2009.04.018
关键词
Titanate nanotube; Temperature sensitive; ATRP
资金
- Major State Basic Research Projects [2005CB623803]
- National Natural Science Foundation of China [2009CB930400, 2007CB808000, 50633010, 20774057, 20874060, 50873058]
- Program for New Century Excellent Talents in University [NCET-07-0558]
- Foundation for the Author of National Excellent Doctoral Dissertation of China
- Fok Ying Tung Education Foundation [114029]
- Basic Research Foundation [07DJ14004]
- Shanghai Science and Technique Committee
- Shanghai Leading Academic Discipline Project [13202]
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 (H-1 NMR), Fourier-transform infrared (Fr-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. (C) 2009 Elsevier Ltd. All rights reserved.
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