Nanoporous ceramic AAO filters

By InRedox

Anisotropic Ceramic Membranes from self-organized nanoporous alumina (also known as Anodic Aluminum Oxide or AAO) contain two layers with different pore structure integrated into a monolithic membrane: Support Layer – spans most of the membrane thickness and contains large uniform pores with porosity of up to 50% to provide mechanical strength and high permeance. Active Layer – a thin layer of AAO with highly uniform monodisperse pores to enable highly selective size-based (2 to 100 nm) separation with very sharp molecular weight cutoff, suitable for nano- and ultrafiltration applications. Wide selection of standard specifications (see pull-down menu below) in stock for on-line ordering and quick delivery. Membrane Holders specifically designed to accommodate thin AAO membranes in filtration and separation processes are available. Customization – if you need different specifications, review the table below and contact us with your requirements. The general range of pore geometries available for anisotropic anodic alumina membranes. PARAMETER AVAILABLE RANGE* SUPPORT LAYER ACTIVE LAYER Pore Diameter, nm 2 – 300 150±25 2, 5, 10, 20, 50, 100, 200 (±10% + 2) Thickness, µm 20 – 200 60±2 (OD 10 to 25 mm) 100±4 (OD 47 mm) 150±10 (OD 90 mm) 1.5-2.5 µm (standard) 1-10 µm (custom) Pore Density, cm -2 10 12 – 10 8 2·10 9 depends on the pore diameter Porosity, % 1 – 60 20 – 30 (typically 25) 10 – 15 * Custom specifications within these ranges are available upon request, contact us with your requirements. Lead time is 2 to 5 days for standard specifications, 3-6 weeks for out of stock and custom specifications. * Volume discounts are available on orders over $750. Contact us with your inquiry. Membrane Size 10 mm diameter, 13 mm diameter, 25 mm diameter, 47 mm diameter, 90 mm diameter Membrane Thickness 60 µm (for OD 10 to 25 mm), 100 um (for OD 47 mm), 150 µm (for OD 90 mm only) Pore Diameter in Active Layer 2-4 nm, 5 nm, 10 nm, 20 nm, 50 nm, 100 nm