Anodic Aluminum Oxide Anisotropic membrane filters, 2-4nm pore, 13mm dia, pk20
| Availability | In Stock |
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| Item | AAOA213-CA |
InRedox Anodic Aluminum Oxide Anisotropic membrane filters, 2-4nm pore, 13mm dia, pk20
Anisotropic Anodic Aluminum Oxide (AAO) contain two layers with different pore structure integrated into a monolithic membrane:
Underlying Support Layer – contains larger pores that provide mechanical strength and high permeance.
Active Layer – an upper thin layer of highly uniform pores
Anisotropic pore structure supports size-based separation in 2 to 10 nm range and makes anisotropic membranes suitable for nanofiltration and ultrafiltration applications. Anisotropic AAO membrane filters are currently available with pore diameters of 2-4nm, 5nm, and 10nm.
These membrane filters are less brittle than similar ceramic membrane filter products ensuring easier handling, usage, and less loss of product or samples during preparation.
Membrane Features
• Precise and reproducible pore geometries
• Pore size from 2 nm to 200 nm
• Narrow pore size distribution, sharp molecular weight cutoff
• Anisotropic (bi-layer) pore structure
• Smooth flat surface, low fouling, straight pores
• Optically transparent when wet, low autofluorescence
• Surface terminated with -OH-groups for binding protocols
• Naturally hydrophilic, no extractables or leachables
• Biocompatible, popular substrate for cell culturing
• Excellent bath-to-batch consistency
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Pore Geometries for Anisotropic AAO Membranes |
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Parameter |
Active Layer |
Support |
Tolerance |
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Pore Diameter (nm) |
2-4 |
5 |
10 |
100-150 |
±(10%+2nm) |
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Pore Period (nm) |
6 |
12 |
26 |
250 |
±(15%+5nm) |
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Pore Density (cm-2) |
3·1012 |
9·1011 |
1.6·1011 |
2·109 |
±20% |
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Porosity (%) |
5-15 |
5-15 |
12 |
15-20 |
±3 |
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Attributes of Anisotropic AAO Membranes |
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Size (mm dia) ±0.2 mm |
13, 25 |
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Thickness (µm) ±(10% +1μm) |
50 |
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Nominal weight (mg/cm2) |
10 to 20 |
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Burst strength (psi) |
50 to 200 (depending on pore size) for 50 µm membrane over 3 mm span |
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Max Service Temp (°C) |
400 |
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pH range |
5-8 |
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Solvent Resistance |
Excellent (can be used with most organic solvents) |
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Autoclavable? |
Yes |
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Air Permeance (cm/s/Pa at 20°C) |
10-8 to 10-4 (depending on pore size and porosity) |
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Water Permeance (cm/s/Pa at 20°C) |
10-10 to 10-6 (depending on pore size and porosity ) |
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Monolithic bi-layer pore structure: Active layer (1-5% of thickness) with pore diameter 2-10 nm for size separation Support layer (95%-99% of thickness) with pore diameter 150-200 nm to provide mechanical support with high flow Applications: nano-, ultra & microfiltration, bioseparation, cell culturing, epiflourescence, electron microscopy, bioanalysis |
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Other pore sizes, filter diameters may be available. Please contact SPI Supplies for further information.