Journal of Industrial and Engineering Chemistry

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Synthesis of amphiphilic silica/polymer composite nanoparticles as water-dispersible nano-absorbent for hydrophobic pollutants

  • Kim, Ju-Young (Department of Advanced Materials Engineering, College of Engineering, Kangwon National University) ;
  • Wainaina, James (Department of Advanced Materials Engineering, College of Engineering, Kangwon National University) ;
  • Na, Jae-Sik (Department of Chemical Engineering, Kwangwoon University)
  • Published : 2011.07.25
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Abstract

Amphiphilic silica/polymer composite nanoparticles were synthesized through consecutive two-step surface modification process. Through the 1st surface-modification, silica nanoparticles having urethane acrylate moieties onto the surface were synthesized and named as VSP nanoparticles. At the 2nd surfacemodification process, VSP particles dispersed in DMSO were copolymerized with amphiphilic reactive oligomers (urethane acrylate nonionomers) to synthesize composite particles (VSP-UAN) where amphiphilic crosslinked polymers and silica nanoparticles were chemically connected with each other. On contacting with water, VSP-UAN formed nanoparticles (154-285 nm) in water without use of any dispersant, and these nanoparticles absorbed larger amount of hydrophobic molecules compared to amphiphilic polymer nanoparticles. On applied in ultrafiltration process, VSP-UAN nanoparticles showed 100% of retention recovery and higher permeate flux compared to amphiphilic polymer nanoparticles and nonionic surfactant (Triton X-100) micelles. This shows high potential in application of VSP-UAN composite nanoparticles as water-dispersible nano-absorbent for hydrophobic pollutants or hydrophobic drugs.

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