TY - JOUR
T1 - Synthesis of polypyrrole nanoparticles by oil-in-water microemulsion polymerization with narrow size distribution
AU - Ovando-Medina, Víctor M.
AU - Peralta, René D.
AU - Mendizábal, Eduardo
AU - Martínez-Gutiérrez, Hugo
AU - Lara-Ceniceros, Tania E.
AU - Ledezma-Rodríguez, Raquel
N1 - Funding Information:
V.M.O.M. wants to thank Consejo Nacional de Ciencia y Tecnología (CONACyT–México) by grant # SEP-80843. The authors thank Gladys Y. Cortez-Mazatán (CIQA) for technical assistance.
PY - 2011/5
Y1 - 2011/5
N2 - Conductive spherical polypyrrole nanoparticles were obtained by polymerization in oil-in-water (o/w) microemulsions using sodium dodecyl sulfate (SDS) as anionic surfactant, ethanol as co-surfactant, and potassium persulfate (KPS, 0.017 wt.%) as oxidizing agent. The average particle diameter (Dp) of the nanoparticles was between 38 and 45 nm with narrow particle size distributions (D w/D n∈<∈1.2). Dp increases with the ethanol concentration due to the intercalation between the polar heads of SDS, promoting instability of the nanoparticles and some coagulation. In this work, low surfactant concentration was used, and the molar ratio of the oxidizing agent to monomer was 8.5∈×∈10-3, a value much lower compared with others reported in the literature. Increasing the ethanol concentration in the recipes enhanced the conductive properties of the polymers due to the high π-conjugation length obtained.
AB - Conductive spherical polypyrrole nanoparticles were obtained by polymerization in oil-in-water (o/w) microemulsions using sodium dodecyl sulfate (SDS) as anionic surfactant, ethanol as co-surfactant, and potassium persulfate (KPS, 0.017 wt.%) as oxidizing agent. The average particle diameter (Dp) of the nanoparticles was between 38 and 45 nm with narrow particle size distributions (D w/D n∈<∈1.2). Dp increases with the ethanol concentration due to the intercalation between the polar heads of SDS, promoting instability of the nanoparticles and some coagulation. In this work, low surfactant concentration was used, and the molar ratio of the oxidizing agent to monomer was 8.5∈×∈10-3, a value much lower compared with others reported in the literature. Increasing the ethanol concentration in the recipes enhanced the conductive properties of the polymers due to the high π-conjugation length obtained.
KW - Microemulsion
KW - Nanoparticles
KW - Polypyrrole
KW - Short-chain alcohols
UR - http://www.scopus.com/inward/record.url?scp=79958287783&partnerID=8YFLogxK
U2 - 10.1007/s00396-011-2394-z
DO - 10.1007/s00396-011-2394-z
M3 - Artículo
SN - 0303-402X
VL - 289
SP - 759
EP - 765
JO - Colloid and Polymer Science
JF - Colloid and Polymer Science
IS - 7
ER -