Paper Title:
Preparation of Monodisperse Poly(N-Isopropylacrylamide) Microgels with β-Cyclodextrin Moieties
  Abstract

Submicron-sized monodisperse and spherical poly(N-isopropylacrylamide-co-glycidyl methacrylate)-β-cyclodextrin (PNG-CD) microgels with both thermo-responsive and molecular-recognition characteristics have been successfully fabricated via soap-free emulsion polymerization and subsequent chemical modification method. The thermo-responsivity of the microgels is based on the volume phase transition of poly(N-isopropylacrylamide) (PNIPAM) and the molecular-recognition property is based on the host-guest inclusion complexation of β-cyclodextrin (β-CD) units with specific guest molecules. The as-prepared microgels are characterized by Fourier transform infrared (FT-IR), scanning electron microscope (SEM), and dynamic light scattering (DLS) instrument. When β-CD is introduced onto the PNG-CD microgels, the volume phase transition temperature (VPTT) of resultant PNG-CD microgels shifts about 6 °C to a higher temperature in comparison with that of corresponding PNG microgels. When the β-CD units in PNG-CD microgels recognize 8-anilino-1-naphthal-enesulfonic acid ammonium salt (ANS) molecules in aqueous solution, the VPTT of PNG-CD microgels shifts around 3 °C negatively to a lower temperature. PNG-CD microgels present molecular-recognition induced swelling characteristics at fixed temperature. The results in this study provide valuable information for development of monodisperse and spherical dual thermo-responsive and molecular-recognition microgels which have potential applications in the fields of microscale molecular sensors and actuators and so on.

  Info
Periodical
Advanced Materials Research (Volumes 311-313)
Chapter
Smart/Intelligent Materials/Intelligent Systems
Edited by
Zhongning Guo
Pages
2269-2276
DOI
10.4028/www.scientific.net/AMR.311-313.2269
Citation
C. J. Cheng, R. Xie, X. J. Ju, L. Y. Chu, "Preparation of Monodisperse Poly(N-Isopropylacrylamide) Microgels with β-Cyclodextrin Moieties", Advanced Materials Research, Vols. 311-313, pp. 2269-2276, 2011
Online since
August 2011
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Price
$32.00
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