Multilayers of poly(styrene/a.-tert-butoxy-w-vinylbenzyl-polyglycidol) microspheres with core-shell morphology: Characterization by AFM, SIMS and XPS

作者：Gosecka Monika; Raczkowska Joanna; Haberko Jakub; Awsiuk Kamil; Rysz Jakub; Budkowski Andrzej; Marzec Mateusz M; Bernasik Andrzej^*; Basinska Teresa^*

来源：Colloids and Surfaces A: Physicochemical and Engineering Aspects , 2016, 507: 200-209.

DOI：10.1016/j.colsurfa.2016.08.007

• Hydrophilic core-shell particles
• Polyglycidol macromonomer
• Emulsion copolymerization
• XPS argon gas cluster sputtering
• SIMS

The methods of preparation and characterization of core-shell poly(styrene/alpha-tert-butoxy-omega-vinylbenzyl-polyglycidol) particles arranged in colloidal crystals are described. The particles were prepared via emulsifier free emulsion copolymerization of styrene and alpha-tert-butoxy-omega-vinylbenzylpolyglycidol macromonomer in aqueous medium, initiated by potassium persulfate. The individual polymerizations differed in a way of addition of macromonomer to the polymerization mixture. The particles assemblies were characterized by atomic force microscopy, Secondary Ion Mass Spectrometry (SIMS) and X-ray Photoelectron Spectroscopy (XPS). In-depth distribution of chemical states was determined by XPS combined with argon gas cluster ion sputtering (Ar-GCIB). The morphology of microspheres assemblies reflected the composition of the entire particles. It was found that the method of macromonomer addition to the polymerization mixture affects the particles size, surface and overall morphology. The XPS profiles revealed the chemical composition of the particles arranged in multilayers. It was found that distribution of polyglycidol segments at the particles interfacial layer depends on the time and way of addition of macromonomer. The thickest outer layer composed from polystyrene-polyglycidol segments was obtained for particles when macromonomer was added at the beginning of polymerization.

• 出版日期2016-10-20