TY - JOUR
T1 - Preparation of monodisperse crosslinked polymelamine microcapsules by phase separation method
AU - Kamio, Eiji
AU - Kato, Aiko
AU - Yonemura, Satoshi
AU - Ono, Tsutomu
AU - Yoshizawa, Hidekazu
N1 - Funding Information:
This work was supported in part by the New Energy and Industrial Technology Development Organization's (NEDO's) ‘Nanotechnology Materials Program—Encapsulation of Functional Nano-particles Project’ with funds provided by the Japanese Ministry of Economy, Trade and Industry (METI) and administered by the Japan Chemical Innovation Institute (JCII).
PY - 2008/6
Y1 - 2008/6
N2 - Monodisperse polymelamine microcapsules were prepared by phase separation method. Control of microcapsule diameter was investigated using the uniform-sized oil-in-water emulsion droplets as the capsule core. The monodisperse emulsion droplets were prepared using the Shirasu porous glass (SPG) membrane emulsification technique. The effects of the diameter of the oil droplet and concentration of sodium dodecyl sulfate (SDS), which is a typical emulsifier in SPG membrane emulsification, on microencapsulation were investigated. The microcapsules were aggregated when oil droplets with small size were microencapsulated at high SDS concentration. To reduce the SDS concentration, the creamed emulsion was used. The monodisperse polymelamine microcapsules were successfully prepared by using the creamed emulsion. The microcapsule diameter was almost similar to the diameter of the encapsulated oil droplet. The coefficient of variation values was about 10% for all microcapsules prepared in this study. Control of microcapsule diameter was achieved in the range of 5-60 μm.
AB - Monodisperse polymelamine microcapsules were prepared by phase separation method. Control of microcapsule diameter was investigated using the uniform-sized oil-in-water emulsion droplets as the capsule core. The monodisperse emulsion droplets were prepared using the Shirasu porous glass (SPG) membrane emulsification technique. The effects of the diameter of the oil droplet and concentration of sodium dodecyl sulfate (SDS), which is a typical emulsifier in SPG membrane emulsification, on microencapsulation were investigated. The microcapsules were aggregated when oil droplets with small size were microencapsulated at high SDS concentration. To reduce the SDS concentration, the creamed emulsion was used. The monodisperse polymelamine microcapsules were successfully prepared by using the creamed emulsion. The microcapsule diameter was almost similar to the diameter of the encapsulated oil droplet. The coefficient of variation values was about 10% for all microcapsules prepared in this study. Control of microcapsule diameter was achieved in the range of 5-60 μm.
KW - Control of capsule diameter
KW - Monodisperse microcapsule
KW - Phase separation method
KW - Shirasuporous glass membrane
KW - Sodiumdodecyl sulfate concentration
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U2 - 10.1007/s00396-008-1837-7
DO - 10.1007/s00396-008-1837-7
M3 - Article
AN - SCOPUS:44549085351
VL - 286
SP - 787
EP - 793
JO - Colloid and Polymer Science
JF - Colloid and Polymer Science
SN - 0303-402X
IS - 6-7
ER -