Park, Incheol Park, Min Kim, Junkyung Lee, Hyunjung Lee, Moo Sung 2024-01-21T00:31:29Z 2024-01-21T00:31:29Z 2021-09-02 2007-10 1598-5032 https://pubs.kist.re.kr/handle/201004/134079 This study demonstrated the in-situ functionalization with polymers of multi-walled carbon nanotubes (MWNTs) via emulsion polymerization. Polystyrene-functionalized MWNTs were prepared in an aqueous solution containing styrene monomer, non-ionic surfactant and a cationic coupling agent ([2-(methacryloyloxy)ethyl]trimethylammonium chloride (MATMAC). This process produced an interesting morphology in which the MWNTs, consisting of bead-string shapes or MWNTs embedded in the beads, when polymer beads were sufficiently large, produced nanohybrid material. This morphology was attributed to the interaction between the cationic coupling agent and the nanotube surface which induced polymerization within the hemimicellar or hemicylindrical structures of surfactant micelles on the surface of the nanotubes. In a solution containing MATMAC alone without surfactant, carbon nanotubes (CNTs) were not well-dispersed, and in a solution containing only surfactant without MATMAC, polymeric beads were synthesized in isolation from CNTs and continued to exist separately. The incorporation of MATMAC and surfactant together enabled large amounts of CNTs (> 0.05 wt%) to be well-dispersed in water and very effectively encapsulated by polymer chains. This method could be applied to other well-dispersed CNT solutions containing amphiphilic molecules, regardless of the type (i.e., anionic, cationic or nonionic). In this way, the solubility and dispersion of nanotubes could be increased in a solvent or polymer matrix. By enhancing the interfacial adhesion, this method might also contribute to the improved dispersion of nanotubes in a polymer matrix and thus the creation of superior polymer nanocomposites. English POLYMER SOC KOREA RADICAL POLYMERIZATION NONCOVALENT DISPERSION POLYSTYRENE COMPOSITES POLYMERS PURIFICATION FLUORINATION BRUSHES WATER Multiwalled carbon nanotubes functionalized with PS via emulsion polymerization Article 10.1007/BF03218822 1 MACROMOLECULAR RESEARCH, v.15, no.6, pp.498 - 505 MACROMOLECULAR RESEARCH 15 6 498 505 scie scopus kci ART001088055 000250853200003 2-s2.0-36048985465 Polymer Science Polymer Science Article RADICAL POLYMERIZATION NONCOVALENT DISPERSION POLYSTYRENE COMPOSITES POLYMERS PURIFICATION FLUORINATION BRUSHES WATER carbon nanotubes emulsion polymerization polymer functionalization [2-(methacryloyloxy)ethyl]trimethylammoniurn chloride