TY - JOUR
T1 - Effect of pH and zeta potential of Pickering stabilizing magnetite nanoparticles on the features of magnetized polystyrene microspheres
AU - Abd El-Mageed, Ahmed I.A.
AU - Shalan, Ahmed Esmail
AU - Mohamed, Lamiaa A.
AU - Essawy, Hisham A.
AU - Taha, Fouad
AU - Dyab, Amro K.F.
N1 - Publisher Copyright:
© 2020 Society of Plastics Engineers
PY - 2021/1
Y1 - 2021/1
N2 - Styrene as a monomer was emulsified in water using several magnetite nanoparticles concentration and pH values. Emulsified styrene drops were used as templates for polymerization, in presence of water soluble free radical initiator, and formation of composite particles. Styrene template drops stabilization was verified by light as well as scanning electron microscopy imaging, which ensured the participation of the particles in building up a mechanical barrier to stop oil drops coalescence. Furthermore, the produced polystyrene composites were strongly attracted to an external magnet. The difference in particles size as a function of pH was elucidated using zeta potential measurements, which indicated dominance of pH on the hydrophilicity of the particles and consequently the extent of emulsification, which in turn affected the size of the obtained microspheres. Under some circumstances, capsules were formed instead of particles. Thereby, it can be concluded that the magnetic microspheres are optimally formed at pH 2.3 independently of the magnetite content used.
AB - Styrene as a monomer was emulsified in water using several magnetite nanoparticles concentration and pH values. Emulsified styrene drops were used as templates for polymerization, in presence of water soluble free radical initiator, and formation of composite particles. Styrene template drops stabilization was verified by light as well as scanning electron microscopy imaging, which ensured the participation of the particles in building up a mechanical barrier to stop oil drops coalescence. Furthermore, the produced polystyrene composites were strongly attracted to an external magnet. The difference in particles size as a function of pH was elucidated using zeta potential measurements, which indicated dominance of pH on the hydrophilicity of the particles and consequently the extent of emulsification, which in turn affected the size of the obtained microspheres. Under some circumstances, capsules were formed instead of particles. Thereby, it can be concluded that the magnetic microspheres are optimally formed at pH 2.3 independently of the magnetite content used.
KW - Pickering emulsion polymerization
KW - magnetite nanoparticles
KW - polystyrene, zeta potential, microspheres
UR - https://www.scopus.com/pages/publications/85096787692
U2 - 10.1002/pen.25571
DO - 10.1002/pen.25571
M3 - Article
AN - SCOPUS:85096787692
SN - 0032-3888
VL - 61
SP - 234
EP - 244
JO - Polymer Engineering and Science
JF - Polymer Engineering and Science
IS - 1
ER -