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Home  >  Journal list  >  Journal of the Society of Materials Science, Japan  >  Vol.63  No.6 (2014)  >  pp.446-450

Journal of the Society of Materials Science, Japan
<<Previous article Vol.63  No.6 (2014)   pp.446 - 450 Next article>>

Effect of Microstructure of Consolidated Zeolite on Its Characteristic of Humidity Conditioning

Masato MATSUDA1), Takeshi SHIONO1), Yasunori OKAMOTO1)
1) Dept. of Chem. & Mater. Tech., Kyoto Inst. of Tech.

Zeolite A exhibits superior moisture-absorption characteristic because zeolite A has a high hydrophilicity and a lot of micropores in its crystal structure. So zeolite A is recognized to be one of excellent humidity conditioning materials. In conventional production method, however, zeolite A is produced as powders with a diameter of a few micrometers. In the present study, the bulky consolidated zeolite A was synthesized with sodium silicate solution, metakaolin, sodium aluminates, and sodium hydroxide at heat-treatment temperatures from 40℃ to 100℃. Characteristics of humidity conditioning were estimated. The consolidated monolithic zeolite A could be synthesized at a temperature of 50℃. The consolidated zeolite exhibited poor moisture-desorption characteristics, compared with excellent moisture-absorption characteristics. In order to improve the moisture-desorption characteristics, furthermore, the microstructure of consolidated zeolite A was controlled by foam formation technique due to the reaction between Al and sodium silicate solution. In consequence of the porous treating, the obtained porous zeolite A with pores diameter from 5 to 110 micrometer improved its moisture-desorption characteristics and had good humidity response.


Keyword:
Zeolite, Humidity conditioning, Foam formation, Microstructure, Geopolymer

Received: October 17, 2013
Published online: June 20, 2014
Copyright © 2014 by The Society of Materials Science, Japan

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