| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
In this study, high-quality ZIF-8 membranes were successfully grown on the surface-modified porous supports by aqueous synthesis without the use of seed crystals. The advantage of using zinc acetate is that the acetate anions can inhibit not only the formation of zinc hydroxide byproducts but also the homogeneous nucleation. The competitive interaction between the coordination of constructing framework and zinc-acetate interaction by carboxylate functionality of acetate anions is essential to control heterogeneous nucleation and membrane growth. These ZIF-8 membranes show excellent gas permeation properties, strongly indicating a well-intergrown polycrystalline layer with enhanced microstructure. The seeding-free aqueous synthesis as proposed in this work can provide an improvement of membrane preparation reliability and a decrease in environmental load, providing potential for improving a scalable and commercializable process configuration for membrane preparation.
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