TITLE:
Microencapsulation of Sodium Hydrogen Carbonate to Generate Carbon Dioxide with Thermal Responsible Shell Material
AUTHORS:
Yohei Koyama, Natsukaze Saito, Kiyomi Fuchigami, Yoshinari Taguchi, Masato Tanaka
KEYWORDS:
Thermal Responsible Microcapsules, Melting Dispersion Cooling Method, Sodium Hydrogen Carbonate, Olefin Wax, α-Tocopherol
JOURNAL NAME:
Journal of Cosmetics, Dermatological Sciences and Applications,
Vol.5 No.1,
March
17,
2015
ABSTRACT: This paper tried to
develop the optimum procedure for microencapsulating water soluble solid powder
with the thermal responsible material by the melting dispersion cooling method.
Sodium hydrogen carbonate was adopted as a water soluble solid powder instead
of microencapsulating carbon dioxide gas. The shell material was composed of
olefin wax and α-tocopherol. In the experiment,
the concentration of oil soluble surfactant and the water soluble surfactant
species were changed. Sodium hydrogen carbonate was treated in the aqueous
solution dissolving the water soluble surfactant to form the finer sodium
hydrogen carbonate powder and to increase the content. The microencapsulation
efficiency could be increased with the concentration of oil soluble surfactant
and considerably increased by treating sodium hydrogen carbonate with the water
soluble surfactant. Sodium hydrogen carbonate was protected well from
environmental water. The microcapsules showed the thermal responsibility to
generate carbon dioxide.