Synthesis and characterization of poly(sodium-p-styrenesulfonate)/modified SiO2 spherical brushes
Year: 2012
Type: article
Abstract: The multistep procedures for preparing novel anionic spherical polyelectrolyte brushes (ASPB) by grafting sodium-p-styrenesulfonate (SSS) from the surface of !-methacryloxypropyl trimethoxy-silane modified SiO 2 nanoparticles were demonstrated.The morphology of ASPB was characterized by Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM).The core radius R c and hydrodynamic radius R h of ASPB measured by Zeta Potential/Particle Sizer (ZLS) were ca.50nm and (84.5±1) nm respectively.The percentage of grafting (PG%) of polyelectrolyte brushes was 4.3% investigated by Thermo-gravimetric analysis (TGA).Detailed characterizations on ASPB were performed by cleaving the grafts from the anchoring surface.The molecular weight (M w ) and polydispersity (M w /M n ) of brushes were 1.788•10 3 g/mol and 1.6 respectively from Gel Permeation Chromatography (GPC) measurements.Moreover, R h and !-potential of ASPB in the presence of aqueous NaCl solutions of different concentrations were discussed.
Source: eXPRESS Polymer Letters
Authors: N. Su, H. B. Li, H. M. Zheng, S. P. Yi, X. H. Liu
Institution: Wuhan University
Language: English
Subfield: Surfaces, Coatings and Films
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
Funder: Wuhan University
OpenAlex ID: W2157081978