Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Preparation and Characterization of Thermo-Responsive Silica Nanoparticles with Cross-linked PNIPAAm Shell Layers

가교된 PNIPAAm 표면층을 가지는 온도응답성 실리카 나노입자의 제조 및 특성분석

  • Han, Tae-Hwan (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Ryu, Kwang-Hee (Department of Organic Materials and Fiber Engineering, Soongsil University) ;
  • Kwark, Young-Je (Department of Organic Materials and Fiber Engineering, Soongsil University)
  • 한태환 (숭실대학교 유기신소재파이버공학과) ;
  • 류광희 (숭실대학교 유기신소재파이버공학과) ;
  • 곽영제 (숭실대학교 유기신소재파이버공학과)
  • Received : 2011.01.26
  • Accepted : 2011.03.04
  • Published : 2011.04.28
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Abstract

In this study, we prepared organic-inorganic hybrid nanoparticies with a core-shell structure using a surface-initiated polymerization technique. Initiators for the atom transfer radical polymerization were anchored onto the surface of silica nanoparticies, and from there N-isopropylacrylamide and methylene bisacrylamide were polymerized to form cross-linked polymeric shell layers. The thickness of the polymer layers was controlled by varying the reaction time. The thermal phase transition of the surface polymer layer was characterized by dynamic light scattering analysis, which showed reversible swelling/deswelling behavior between $25^{\circ}C$ and $40^{\circ}C$. Compared to the silica nanoparticies with linear polymer layers, the swelling/deswelling behavior was of a smaller degree, but it consistently exhibited similar size changes after repeated processes. HF etching of the silica nanoparticies with surface cross-linked polymer layers removed the silica core to render a hollow structure.

Keywords

Acknowledgement

Supported by : 한국학술진흥재단

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