Emulsification of viscous alkyd resin by ...
Document type :
Article dans une revue scientifique: Article original
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Title :
Emulsification of viscous alkyd resin by catastrophic phase inversion with nonionic surfactant
Author(s) :
Pierlot, Christel [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Ontiveros, Jesus [Auteur]
3209|||Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Royer, Maxime [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Catté, Marianne [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Salager, Jean-Louis [Auteur]
Royer, Maxime [Auteur]

Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Ontiveros, Jesus [Auteur]
3209|||Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Royer, Maxime [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Catté, Marianne [Auteur]

Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Salager, Jean-Louis [Auteur]
Royer, Maxime [Auteur]
Journal title :
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume number :
536
Pages :
113-124
Publisher :
Elsevier
Publication date :
2018-01-05
ISSN :
0927-7757
English keyword(s) :
Emulsion
Alkyd
Viscous
Catastrophic phase inversion
Torque
Alkyd
Viscous
Catastrophic phase inversion
Torque
HAL domain(s) :
Chimie/Chimie organique
English abstract : [en]
The addition of water to hydrophobic alkyd resin containing a hydrophilic nonionic surfactant (polyethoxylated-20-oleyl alcohol) was used to produce the emulsion morphology change from W/O to O/W in a small thermostated ...
Show more >The addition of water to hydrophobic alkyd resin containing a hydrophilic nonionic surfactant (polyethoxylated-20-oleyl alcohol) was used to produce the emulsion morphology change from W/O to O/W in a small thermostated reactor (50 mL). The so-called catastrophic phase inversion of the water/alkyd resin system was detected by monitoring both, the viscosity by torque measurement and the electrical conductivity, until an equal weight fraction of water and resin is attained (fw = 0.5). The two methods provide similar values of the phase inversion point (PIP). Although the determination of the PIP exhibits a small inaccuracy, it is clear that different torque profiles and PIP are observed depending on the resin neutralization level, the surfactant concentration and the water addition rate. For the non-neutralized resin, both, PIP and emulsion drop size, decrease with surfactant concentration increase. The completely neutralized resin could be emulsified using a minimum of 2 wt% of surfactant in the final emulsion. In such a case the water fraction at which inversion occurs (fw,Inv = 0.36) is independent of the surfactant concentration and a small resin drop diameter (<200 nm) can be obtained. A more precise study of the reached drop size of the emulsion versus resin neutralization (0, 25, 50, 75, 100 and 125%) indicates that a minimum diameter is obtained around 90–100% neutralization, with no effect of over-neutralization. For non-neutralized resin a maximum fw,Inv (0.25) can be obtained by reducing water addition rate allowing the production of 0.5 μm droplets in a longer process.Show less >
Show more >The addition of water to hydrophobic alkyd resin containing a hydrophilic nonionic surfactant (polyethoxylated-20-oleyl alcohol) was used to produce the emulsion morphology change from W/O to O/W in a small thermostated reactor (50 mL). The so-called catastrophic phase inversion of the water/alkyd resin system was detected by monitoring both, the viscosity by torque measurement and the electrical conductivity, until an equal weight fraction of water and resin is attained (fw = 0.5). The two methods provide similar values of the phase inversion point (PIP). Although the determination of the PIP exhibits a small inaccuracy, it is clear that different torque profiles and PIP are observed depending on the resin neutralization level, the surfactant concentration and the water addition rate. For the non-neutralized resin, both, PIP and emulsion drop size, decrease with surfactant concentration increase. The completely neutralized resin could be emulsified using a minimum of 2 wt% of surfactant in the final emulsion. In such a case the water fraction at which inversion occurs (fw,Inv = 0.36) is independent of the surfactant concentration and a small resin drop diameter (<200 nm) can be obtained. A more precise study of the reached drop size of the emulsion versus resin neutralization (0, 25, 50, 75, 100 and 125%) indicates that a minimum diameter is obtained around 90–100% neutralization, with no effect of over-neutralization. For non-neutralized resin a maximum fw,Inv (0.25) can be obtained by reducing water addition rate allowing the production of 0.5 μm droplets in a longer process.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Research team(s) :
Colloïdes catalyse oxydation (CÏSCO)
Submission date :
2019-09-25T14:37:47Z
2021-03-12T15:10:29Z
2023-11-08T17:26:57Z
2023-11-10T13:26:29Z
2021-03-12T15:10:29Z
2023-11-08T17:26:57Z
2023-11-10T13:26:29Z
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