Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 196, Issue -, Pages 238-243Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2014.03.047
Keywords
Octa(azidopropyl) POSS; Propargyl-terminated PEO; Micelle; Core-shell
Funding
- Shanghai Leading Academic Discipline Project [B502]
- Fundamental Research Funds for the Central University [WD113006]
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An amphiphilic OAPS-PEO was synthesized by click reaction between octa(azidopropyl) POSS (OAPS) and propargyl-terminated PEO. The structure of OAPS-PEO was characterized by nuclear magnetic resonance (NMR). The amphiphilic properties and aggregation process of OAPS-PEO in aqueous solution were investigated by fluorescence, dynamic and static light scattering (DLS and SLS), and transmission electron microscopy (TEM). The critical aggregates concentration was determined at -0.10 mg/mL using fluorescence measurements. At this concentration, unassociated unimolecular micelles with diameter size of 40-50 nm were found by DLS, and were also studied by means of TEM. At a lower concentration, all the OAPS-PEO self-assembled into loose balls. With the increase of the OAPS-PEO polymer concentration, OAPS centralizes to be the core of the aggregates. At the concentration of 2.0 mg/mL, aggregates present to be a core-shell structure. (c) 2014 Elsevier B.V. All rights reserved.
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