UniKera Standard Membranes

Synkera offers symmetric monodisperse nanoporous ceramic membranes that are produced from nanoporous anodic aluminum oxide (AAO). This type of membrane features a symmetrical nanoporous architecture with uniform cylindrical pores penetrating the entire thickness of the membrane, and are characterized by a high degree of pore ordering and narrow pore size distribution (standard deviation is typically better than 8%, and in some cases is as low as 5%).

Synkera's symmetric membranes have superior mechanical and thermal stability far exceeding that of anodic alumina membranes from other suppliers. As-prepared AAO membranes are amorphous, but could be converted to nanocrystalline gamma and alpha-alumina phases which further enhances the membrane's chemical and thermal stability. Synkera offers several membrane heat-treatment options for operating temperatures up to 1000°C.

The range of currently available membrane specifications is summarized in the table below. We maintain an inventory of membranes with standard specifications. Most of our ceramic membranes could be ordered with a pore diameter in the range from 10 to 150 nm, and the thickness from 15 to 100 microns. For more details on this product, please see the AAO Technology Profile.

To order membranes, inquire on the product availability for non-standard specifications, and/or get feedback on your desired applications, please fill out our Info/Quote Request Form.

Parameter	Standard								Custom
Pore Diameter, nm (SD 7-10%)	13	18	35	55	73	80	100	150	10-200
Pore Density,^§ cm^-2	1·10¹¹	5·10¹⁰	1·10¹⁰	5·10⁹	4·10⁹	4·10⁹, 2·10^{9 §}	4·10⁹, 2·10⁹,^§ 1·10⁹	2·10⁹,^§ 1·10⁹	2·10¹¹ - 2·10⁹
Pore Period,^§ nm	32	41	107	145	178	178, 251 ^§	178, 251,^§ 344	251,^§ 344	20 - 350
Estimated Porosity,^§ %	9	10	12	12	12	18, 8 ^§	30, 15,^§ 8	32,^§ 17	10% to 50%
Thickness, µm (± 2%)	50 and 100*								15-150 ± 2%
Format / Size	round shape: 13, 25, 47 mm square shape: 10x10 mm								custom shapes, up to 120 mm in size
Operating Temperature	No heat treatment: · up to 500°C (depending on the environment) Heat treatment options: · OPTION 1: ≤ 700°C (amorphous) · OPTION 2: ≤ 900°C (γ-alumina) · OPTION 3: ≤ 1000°C (γ/ α - alumina) *								up to 1000°C (γ/ α - alumina) *
Availability	3-4 weeks if not in-stock								4-6 weeks

§ Standard pore density, period and porosity values for 80, 100 and 150 nm pore sizes.
* Heat treatment option 3 is not available for 13 and 18 nm pores

Based on our expertise in materials science, nano- and microfabrication, and using this featured AAO membrane as a platform, Synkera is developing a portfolio of symmetric membrane products for the following applications:

gas separation membranes (composite and diffusion-based)
membrane-reactors
membrane standards

Partnerships are welcomed for joint application development in these areas. If you need additional information, are interested in membrane evaluation, or would like to discuss further, please email us at info@synkera.com


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