TY - JOUR
T1 - A highly hydrophobic anionic surfactant at oil-water, water-polymer and oil-polymer interfaces
T2 - Implications for spreading coefficients, polymer interactions and microencapsulation via internal phase separation
AU - Andersson Trojer, Markus
AU - Eastoe, Julian
AU - Mohamed, Azmi
PY - 2013/9/5
Y1 - 2013/9/5
N2 - Multicore-shell particles consisting of a poly(methyl methacrylate) shell and multiple dodecane cores have been prepared via the internal phase separation method using the oil-soluble anionic surfactant sodium 1,5-dioxo-1,5-bis(3,5,5-trimethylhexylocy)-3-((3,5,5 trimethylhexyloxy)carbonyl)pentane-2-sulfonate (TC4) and the water-soluble polycation poly(diallyldimethylammonium chloride) (PDADMAC) in combination as a dispersant pair. The multicore-shell particles have been investigated using SEM, light microscopy and microelectrophoresis. The detailed influence of TC4 on the oil-water, water-polymer and oil-polymer interfaces and its interaction with PDADMAC have been investigated using a quartz crystal microbalance with dissipation monitoring (QCM-D) and different optical tensiometry methods. TC4 stabilizes in particular the polymer-water interface in the presence of PDADMAC instead of the oil-water interface in contrast to water-soluble surfactants. In addition, the oil-polymer interface is stabilized by TC4 which prevents coalescence of the oil droplets and leads to multicore-shell morphology rather than single core-shell.
AB - Multicore-shell particles consisting of a poly(methyl methacrylate) shell and multiple dodecane cores have been prepared via the internal phase separation method using the oil-soluble anionic surfactant sodium 1,5-dioxo-1,5-bis(3,5,5-trimethylhexylocy)-3-((3,5,5 trimethylhexyloxy)carbonyl)pentane-2-sulfonate (TC4) and the water-soluble polycation poly(diallyldimethylammonium chloride) (PDADMAC) in combination as a dispersant pair. The multicore-shell particles have been investigated using SEM, light microscopy and microelectrophoresis. The detailed influence of TC4 on the oil-water, water-polymer and oil-polymer interfaces and its interaction with PDADMAC have been investigated using a quartz crystal microbalance with dissipation monitoring (QCM-D) and different optical tensiometry methods. TC4 stabilizes in particular the polymer-water interface in the presence of PDADMAC instead of the oil-water interface in contrast to water-soluble surfactants. In addition, the oil-polymer interface is stabilized by TC4 which prevents coalescence of the oil droplets and leads to multicore-shell morphology rather than single core-shell.
KW - Dilatational rheology
KW - Langmuir adsorption
KW - Lewis acid-base
KW - Microcapsule
KW - Negative interfacial free energy
KW - Surface free energy
UR - http://www.scopus.com/inward/record.url?scp=84884519920&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2013.08.005
DO - 10.1016/j.colsurfa.2013.08.005
M3 - Article (Academic Journal)
AN - SCOPUS:84884519920
SN - 0927-7757
VL - 436
SP - 1048
EP - 1059
JO - Colloids and Surfaces A. Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A. Physicochemical and Engineering Aspects
ER -