Synthesis of amphiphilic silica/polymer composite nanoparticles as water-dispersible nano-absorbent for hydrophobic pollutants

초록

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 surface-modification 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. Crown Copyright (C) 2011 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry. All rights reserved.

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