Monodisperse and fluorescent poly(styrene-co-methacrylic acid-co-2-naphthyl methacrylate)/Fe3O4 composite particles.
This article describes the preparation and characterization of fluorescent and magnetic composite particles of poly(styrene-co-methacrylic acid-co-2-naphthyl methacrylate) (poly(St/MAA/NMA)). First, monodisperse (D(w)/D(n)<1.1) and fluorescent poly(St/MAA/NMA) submicron particles were prepared using emulsifier-free emulsion polymerization by varying the concentration of the fluorescent comonomer, i.e., NMA. Composition of the particles was characterized by (1)H NMR, FT-IR, GPC, and DSC analyses. The molecular weights and particle size of the particles were dependent on the NMA concentration. Second, Fe(3)O(4) nanoparticles were immobilized onto the poly(St/MAA/NMA) submicron particles to give rise to multifunctional properties. The morphology and particles size were characterized by FE-SEM and CHDF. These poly(St/MAA/NMA)/Fe(3)O(4) composite particles exhibited both fluorescent properties under UV irradiation at 365 nm and magnetic properties. Photo-luminescent (PL) intensity of the particles showed linear dependence with NMA concentration.
Govindaiah
Patakamuri
P
Department of Chemical and Biomolecular Engineering, Yonsei University, 134 Shinchon-Dong, Sudaemoon-Gu, Seoul 120-749, Republic of Korea.
Jung
Yeon Jae
YJ
Lee
Jung Min
JM
Park
Tae-Joon
TJ
Ryu
Du Yeol
du Y
Kim
Jung Hyun
JH
Cheong
In Woo
IW
D002152:Calorimetry, Differential Scanning; D004655:Emulsions / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008689:Methacrylates / Q000737:chemistry*; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry*; D010316:Particle Size; D011137:Polystyrenes / Q000737:chemistry*
D004655:Emulsions; D005456:Fluorescent Dyes; D008689:Methacrylates; D009281:Naphthalenes; D011137:Polystyrenes; C008384:methacrylic acid