title: Membrane formation mechanism of cross-linked polyurea microcapsules by phase separation method.
abstract: This research was conducted to clarify the membrane formation mechanism of cross-linked polyurea microcapsules by phase separation method, especially the role of polymeric surfactant, such as poly(ethylene-alt-maleic anhydride) (poly(E-MA)) at the interface of O/W emulsion. It was found that poly(E-MA) was necessary for the formation of cross-linked polyurea membrane. The addition of sodium dodecyl sulphate (SDS) prohibited the membrane formation reaction at the interface, even in the case of poly(E-MA) concentration enough for polymeric microcapsule formation. From the results in this study, poly(E-MA) was found to be adsorbed on the O/W emulsion and provide the reaction site for the membrane formation of polymeric microcapsules.
authors.affiliation: Department of Environmental Chemistry and Materials, Faculty of Environmental Science and Technology, Okayama University, 3-1-1 Tsushima-Naka, Okayama 700-8530, Japan. yhide@cc.okayama-u.ac.jp
authors.forename: H
authors.initials: H
authors.lastname: Yoshizawa
authors.forename: E
authors.initials: E
authors.lastname: Kamio
authors.forename: N
authors.initials: N
authors.lastname: Hirabayashi
authors.forename: J
authors.initials: J
authors.lastname: Jacobson
authors.forename: Y
authors.initials: Y
authors.lastname: Kitamura
mesh_terms: D002214:Capsules; D003432:Cross-Linking Reagents; D004339:Drug Compounding / Q000379:methods*; D004586:Electrophoresis; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D011108:Polymers
chemical_list: D002214:Capsules; D003432:Cross-Linking Reagents; D008567:Membranes, Artificial; D011108:Polymers; C045786:polyurea