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http://dx.doi.org/10.1021/ja907359t

has been cited by the following article:

• TITLE: Synthesis and Characterization of Poly (Methyl Methacrylate)/Polyethylenimine Grafting Core-Shell Nanoparticles for CO2 Adsorption Using Soap-Free Emulsion Copolymerization

  AUTHORS: Jun-Won Kook, Ji Young Lee, Ki Seob Hwang, In Park, Jung Hyun Kim, Jun-Young Lee

  KEYWORDS: Polyethylenimine, Core-Shell Nanoparticle, CO2 Adsorption, Grafting Reaction, Soap-Free Emulsion

  JOURNAL NAME: Advances in Materials Physics and Chemistry, Vol.6 No.7, July 20, 2016

  ABSTRACT: Unlike previous emulsion polymerization, we used grafting reactions in soap-free emulsion systems. In this study, we synthesized grafted PMMA/PEI core-shell nanoparticles by varying the MMA/PEI content and molecular weight of PEI (Mn = 600, 8000, and 10,000). The size and morphology of the core-shell nanoparticles were characterized by a particle size analyzer and scanning electron microscopy. The nanoparticles were 178 - 408 nm in diameter and swelled in water or methanol by 30 - 75 nm. The size of the nanoparticles increased with MMA contents, whereas the size distribution progressively became homogeneous with increasing molecular weight of PEI. Lastly, we measured CO2 adsorption capacity of the grafted PMMA/PEI core-shell nanoparticles, and we found the capacity to be limited at a level of 0.69 mg, which occurred for nanoparticles prepared from emulsions at a pH value of 11.