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Preparation of Methylcellulose Microcapsules Containing L-Glutamine

by Using Coalescence between Droplets in W/O Emulsion

Masato Tanaka*�, Yoshinari Taguchi* and Chieko Shima

Department of Science and Technology, Graduate School, Niigata University,

,�2*/* Ikarashi, Niigata-shi, Niigata 3/*�,+2+

* Department of Chemical Engineering, Niigata University,

,�2*/* Ikarashi, Niigata-shi, Niigata 3/*�,+2+

����������������

It was investigated whether methylcellulose microcapsules containing l-glutamine were able to be

prepared by using coalescence between two kinds of droplets in W/O emulsion or not. Methylcellulose as the shell

material was dissolved in the one aqueous droplets and the tannic acid as the gelation agent for methylcellulose

was dissolved in the other aqueous droplets. It was found that methylcellulose microcapsules were able to be

prepared by coalescence between the two kinds of droplets. The mean microcapsule diameter and the content rate

of l-glutamine were found to increase with the concentration of methylcellulose. Moreover, it was found that

microcapsules were not destroyed in the water phase and l-glutamine was released through the ungelated part of

the microcapsule shell. (Received May ,, ,**/ ; Accepted Jun. +0, ,**/)

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�/º ®Corresponding author`� [email protected]

Nippon Shokuhin Kagaku Kogaku Kaishi Vol. /,, No. 3, .*0 .++ (,**/) »01¼406 ® 22 `

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Fig. + Schematic diagram of experimental apparatus

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Table + Experimental conditions

²Experimental Conditions³volume of continuous phase

volume of dispersed phase

amount of lecithin

volume of gelation agent solution

concentration of gelation agent

impeller speed

reaction temperature

reaction time

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