Health & Environmental Research Online (HERO)


Print Feedback Export to File
2901244 
Journal Article 
Role of phosphate-modified mesoporous silica nanoparticles for altering biomimetic metal-induced aggregation process of pluronic F127 block copolymer 
Nam, Y; Lee, D; Cho, EunBum 
2013 
1 
Materials Letters
ISSN: 0167-577X
EISSN: 1873-4979 
110 
176-179 
WOS:000325908300048 
Phosphate-modified mesoporous silica nanoparticle (PMSN) with large pores over 10 nm is very effective in disrupting biomimetic aggregates of Pluronic F127 PEO PPO PEO block copolymer induced by Mn2+. Mesoporous silica nanoparticies were prepared using cetyltrimethyl ammonium bromide (DAB) and tetramethyl orthosilicate (TMOS) in basic conditions. Mesopores were expanded up to 15 nm using 1,3,5-trimethylbenzene (TMB) as a pore expander and phosphate groups were attached on the surface of mesoporous silica nanoparticles using 3-(trihydroxysilyl)propyl methylphosphonate (THPMP). F127 block copolymers formed aggregates in Mn2+-containing methanol solution and the aggregation process was abruptly reduced by adding small amount of PMSNs, which are attributed to negatively-charged phosphate groups on PMSN surface and high mesoporosity of PMSNs. TEM images clearly showed PMSNs adsorb F127 block copolymers as well as Mn2+. (C) 2013 Elsevier B.V. All rights reserved. 
Phosphate-modified mesoporous silica nanoparicle; Biomimetic aggregates; Pluronic block copolymer; Mn2+; 1,3,5-Trimethylbenzene