Advanced

Morphologies and droplet sizes of alkyd-acrylic hybrids with high solids content

Jowkar Deriss, Mehrnoush LU and Karlsson, Ola LU (2004) In Colloids and Surfaces A: Physicochemical and Engineering Aspects 245(1-3). p.115-125
Abstract
Alkyd-acrylic hybrids having final solids content of 75-80% were prepared by dropping alkyd resin into an acrylic dispersion. The resulting suspo emulsion structures and the alkyd droplet sizes in the hybrids were dependent on the preparation procedure as well as the interfacial tension between the two liquid phases, sigma(12), the shear rate, gamma, the latex/alkyd ratio and the viscosity ratio, p, between the viscosity of the dispersed phase. eta(d), and the viscosity of the matrix, eta(m). sigma(12) was varied by changing the surfactant concentration and pH of the hybrids, eta(d) was varied by changing the viscosity of the alkyd phase but was also affected by variations in the pH, and finally the shear stress was varied by varying the... (More)
Alkyd-acrylic hybrids having final solids content of 75-80% were prepared by dropping alkyd resin into an acrylic dispersion. The resulting suspo emulsion structures and the alkyd droplet sizes in the hybrids were dependent on the preparation procedure as well as the interfacial tension between the two liquid phases, sigma(12), the shear rate, gamma, the latex/alkyd ratio and the viscosity ratio, p, between the viscosity of the dispersed phase. eta(d), and the viscosity of the matrix, eta(m). sigma(12) was varied by changing the surfactant concentration and pH of the hybrids, eta(d) was varied by changing the viscosity of the alkyd phase but was also affected by variations in the pH, and finally the shear stress was varied by varying the solids content and the amount of latex in the hybrid systems. Parameters that effected the ratio, p, were also studied separately and in combination. and by varying parameters such as the presence of latex particles, alkyd viscosity and solids content, the effect of p on the alkyd droplet size was determined. Different liquid structures were obtained depending on how the surfactant was added to the system. When surfactant was added to the latex prior to the addition of the alkyd, an O/W emulsion was formed. However, if the surfactant was added to the alkyd prior to the addition of the alkyd to the latex, a multi-emulsion (W/O/W) of alkyd was formed, which was also observed when the hybrids were prepared at a high pH. The structures obtained were stable over time and remained unchanged even after ageing for 1 year at room temperature. (C) 2004 Published by Elsevier B.V. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Colloids and Surfaces A: Physicochemical and Engineering Aspects
volume
245
issue
1-3
pages
115 - 125
publisher
Elsevier
external identifiers
  • wos:000224818600016
  • scopus:4644370316
ISSN
0927-7757
DOI
10.1016/j.colsurfa.2004.07.003
language
English
LU publication?
yes
id
854af09f-c60b-400f-9613-a31ee07ca477 (old id 139482)
date added to LUP
2007-07-13 12:41:20
date last changed
2017-02-26 04:15:19
@article{854af09f-c60b-400f-9613-a31ee07ca477,
  abstract     = {Alkyd-acrylic hybrids having final solids content of 75-80% were prepared by dropping alkyd resin into an acrylic dispersion. The resulting suspo emulsion structures and the alkyd droplet sizes in the hybrids were dependent on the preparation procedure as well as the interfacial tension between the two liquid phases, sigma(12), the shear rate, gamma, the latex/alkyd ratio and the viscosity ratio, p, between the viscosity of the dispersed phase. eta(d), and the viscosity of the matrix, eta(m). sigma(12) was varied by changing the surfactant concentration and pH of the hybrids, eta(d) was varied by changing the viscosity of the alkyd phase but was also affected by variations in the pH, and finally the shear stress was varied by varying the solids content and the amount of latex in the hybrid systems. Parameters that effected the ratio, p, were also studied separately and in combination. and by varying parameters such as the presence of latex particles, alkyd viscosity and solids content, the effect of p on the alkyd droplet size was determined. Different liquid structures were obtained depending on how the surfactant was added to the system. When surfactant was added to the latex prior to the addition of the alkyd, an O/W emulsion was formed. However, if the surfactant was added to the alkyd prior to the addition of the alkyd to the latex, a multi-emulsion (W/O/W) of alkyd was formed, which was also observed when the hybrids were prepared at a high pH. The structures obtained were stable over time and remained unchanged even after ageing for 1 year at room temperature. (C) 2004 Published by Elsevier B.V.},
  author       = {Jowkar Deriss, Mehrnoush and Karlsson, Ola},
  issn         = {0927-7757},
  language     = {eng},
  number       = {1-3},
  pages        = {115--125},
  publisher    = {Elsevier},
  series       = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},
  title        = {Morphologies and droplet sizes of alkyd-acrylic hybrids with high solids content},
  url          = {http://dx.doi.org/10.1016/j.colsurfa.2004.07.003},
  volume       = {245},
  year         = {2004},
}