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PES (Polyethersulfone) Membranes

PES (Polyethersulfone) Membranes

STERLITECH https://www.cotecno.cl/shop/pes-polyethersulfone-membranes-629495 https://www.cotecno.cl/web/image/product.template/629495/image_1920?unique=337f068

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Descripción general

PES (Polyethersulfone) Membranes

Features:

Strong and durable for easy handling

Características principales
  • Lot-to-lot consistency provides reproducible results every time
  • Uniform pore structure
  • Low protein binding

Preguntas frecuentes

The pores of microporous membrane filters act as small capillaries. When hydrophilic membranes come into contact with water, capillary action associated with surface tension forces causes the water to spontaneously enter and fill the pores. In this manner, the membranes are easily wetted and allow the bulk flow of water through the pores. Once wetted, hydrophilic membranes will not allow the bulk flow of air or other gasses, unless they are applied at pressures greater than the membrane’s bubble point.

Hydrophilic membrane filters are typically used with water and aqueous solutions. They can also be used with compatible non-aqueous fluids. Hydrophilic membrane filters are typically not used for air, gas or vent filtration since the filters would block flow if inadvertently wetted, by condensation for example.

When hydrophobic membranes come into contact with water, surface tension forces act to repel the water from the pores. Water will not enter the pores and the membranes will act as a barrier to water flow, unless the water is applied at pressures greater than the membrane’s water entry pressure. Low surface tension fluids, such as alcohols, can spontaneously enter and fill the pores of hydrophobic membranes. Once all the air in the pores is displaced, there are no longer any surface tension forces and water can easily enter the pores, displace the low surface tension fluid, and pass through the membrane. The membrane will then allow bulk flow of water for as long as the pore remain water filled. If the membrane is allowed to dry (i.e. air enters the pores), then it must be pre-wet with a low surface tension fluid again prior to use with water.

Hydrophobic membrane filters are typically used with compatible non-aqueous fluids. They are also commonly used as air, gas, or vent filters. Hydrophobic membrane filters are sometimes used with water or aqueous solutions; and, in these applications, they must first be prewet with a low surface tension, water miscible fluid prior to use.

PES Membranes are low protein binding, PES membrane filters are ideal for tissue culture media sterilization, life science and microbiology fluid applications.

The maximum operating temperatures for Sterlitech filter membranes are listed below.

  • Sterlitech Silver Metal - 427°C
  • Sterlitech Ceramic - 350°C
  • Sterlitech Polycarbonate Track Etch - 140°C
  • Sterlitech Polyester - 140°C
  • Sterlitech Nitrocellulose (MCE) - 130°C
  • Sterlitech Nylon - 180°C
  • Sterlitech Polyethersulfone (PES) - *130°C
  • Sterlitech Polypropylene - 82°C
  • Sterlitech Cellulose Acetate - 135°C
  • Sterlitech PTFE (Laminated) - 130°C
  • Sterlitech PTFE (Unlaminated) - 260°C
  • Sterlitech PVC Data not available

*5.0um and 8.0um - max temp is 180°C

The polyethersulfone (PES) Filtros de membrana have asymmetrical pore structure. The pore structure varies within the thickness of the membrane such that the largest openings occur on one side and the smallest openings occur on the opposite side. When viewing the membrane with reflected light at low incidence angles, each side has a somewhat different visual appearance. The side with the largest pores will appear more dull or matte than the side with the smallest pores. With a little bit of experience, most users can easily identify the sides. For optimal throughput, the PES Filtros de membrana should be oriented so that side with the largest pores (the duller side) is facing upstream. For applications involving microscopic analyses of captured particles or microbes, the user may choose to orient the filter so that the side with the smallest pores (the shinier side) is facing upstream. This orientation may reduce throughput but it improves the likelihood of capturing particles of interest on the surface of the membrane instead of within the pore structure.

The polyethersulfone (PES) Filtros de membrana have asymmetrical pore structure. The pore structure varies within the thickness of the membrane such that the largest openings occur on one side and the smallest openings occur on the opposite side. When viewing the membrane with reflected light at low incidence angles, each side has a somewhat different visual appearance. The side with the largest pores will appear more dull or matte than the side with the smallest pores. With a little bit of experience, most users can easily identify the sides. For optimal throughput, the PES Filtros de membrana should be oriented so that side with the largest pores (the duller side) is facing upstream. For applications involving microscopic analyses of captured particles or microbes, the user may choose to orient the filter so that the side with the smallest pores (the shinier side) is facing upstream. This orientation may reduce throughput but it improves the likelihood of capturing particles of interest on the surface of the membrane instead of within the pore structure.

We have a Chemical Compatibility Chart that you can use for reference.

Nominal pore size ratings are provided as a general indication of filter retention. It is understood that some quantity of particles greater than, and equal to, the nominal pore size ratings will pass through the filters into the filtrate. Some manufactures may associate nominal pore size ratings with percentage filtration efficiencies. Nominal pore size ratings vary from manufacturer to manufacturer and, consequently, are not necessarily equivalent. Filters from different manufactures with similar nominal pore size ratings may not actually exhibit similar retention characteristics.

Absolute Tamaño de poro ratings are typically based on retention studies performed using challenge suspensions of standard microorganism cultures or particles of known size. Absolute Tamaño de poro ratings represent the size of the smallest microorganisms or particles completely retained during these studies. Absolute Tamaño de poro ratings are almost always correlated to bubble point Especificaciones that are used for quality control during membrane manufacturing. For the most part, absolute Tamaño de poro ratings, especially those based on microbial retention, are comparable from manufacturer to manufacturer. There is more uncertainty for absolute Tamaño de poro ratings based on particle retention studies, especially for Tamaño de poro ratings <0.2µm, since there are no standard methods for these studies.

Regardless of pore size ratings, it is important to understand that application conditions do influence particle retention. Even filters with absolute pore size ratings can be operated in conditions that will allow unexpectedly sized particles to pass.

The polyethersulfone (PES) membranes used in the Sterlitech membrane filters have asymmetric pore structure. The pore structure varies within the thickness of the membrane such that the largest openings occur on one side and the smallest openings occur on the opposite side. When viewing the membrane with reflected light at low incidence angles, each side has a somewhat different visual appearance. The side with the largest pores will appear more dull (or matte) than the side with the smallest pores (which will appear shinier). With a little bit of experience, most users can easily identify the sides. The membranes can be used with either surface oriented upstream without affecting retention. However, orienting the dull side upstream increases total throughputwhile orienting the shiny side upstream allows for better analyses of the retained particles.

The Tamaño de poro refers to the diameter of the individual pores in a Filtro de membrana. Tamaño de poro is typically specified in micrometers (µm). Most membranes and filter media actually contain a distribution of pore sizes. Nominal Tamaño de poro ratings typically refer to the predominant Tamaño de poro of a filtration media; pores larger and smaller than the nominal rating may be present. Absolute Tamaño de poro ratings typically refer to the largest Tamaño de poro of a membrane and it is expected that all pores will be equal to or smaller than the absolute rating.

For the polycarbonate track-etch (PCTE) and polyester track-etch (PETE) Filtros de membrana, porosity is the percent of the total surface area occupied by the pores; it typically ranges from <1% to 16%. For the other Filtros de membrana, porosity is the percent of the total volume occupied by the pores; it typically ranges from 40 to 80%.

For lateral flow assays, membranes with high protein binding capacities are preferred. Consequently, with their inherently low protein binding capacities, PES membrane filters are typically not used in these applications.

Especificación
0.03 µm · 13 mm · pack 100
0.03 µm · 142 mm · pack 20
0.03 µm · 150 mm · pack 20
0.03 µm · 200 x 200 · pack 5
0.03 µm · 25 mm · pack 100
0.03 µm · 293 mm · pack 25
0.03 µm · 47 mm · pack 100
0.03 µm · 90 mm · pack 25
0.1 µm · 150 mm · pack 20
0.1 µm · 200 x 200 · pack 5
0.1 µm · 25 mm · pack 100
0.1 µm · 293 mm · pack 25
0.1 µm · 300 x 3000 · pack 1
0.1 µm · 47 mm · pack 100
0.1 µm · 90 mm · pack 25
0.2 µm · 13 mm · pack 100
0.2 µm · 142 mm · pack 20
0.2 µm · 150 mm · pack 20
0.2 µm · 200 x 200 · pack 5
0.2 µm · 25 mm · pack 100
0.2 µm · 293 mm · pack 25
0.2 µm · 300 x 3000 · pack 1
0.2 µm · 47 mm · pack 100
0.2 µm · 90 mm · pack 25
0.22 µm · 47 mm · pack 150
0.45 µm · 102 mm · pack 25
0.45 µm · 13 mm · pack 100
0.45 µm · 142 mm · pack 20
0.45 µm · 150 mm · pack 20
0.45 µm · 200 x 200 · pack 5
0.45 µm · 25 mm · pack 100
0.45 µm · 293 mm · pack 25
0.45 µm · 300 x 3000 · pack 1
0.45 µm · 47 mm · pack 100
0.45 µm · 90 mm · pack 25
0.65 µm · 13 mm · pack 100
0.65 µm · 200 x 200 · pack 5
0.65 µm · 25 mm · pack 100
0.65 µm · 293 mm · pack 25
0.65 µm · 47 mm · pack 100
0.65 µm · 90 mm · pack 25
0.8 µm · 13 mm · pack 100
0.8 µm · 142 mm · pack 20
0.8 µm · 200 x 200 · pack 5
0.8 µm · 25 mm · pack 100
0.8 µm · 293 mm · pack 25
0.8 µm · 300 x 3000 · pack 1
0.8 µm · 47 mm · pack 100
0.8 µm · 90 mm · pack 25
1.2 µm · 13 mm · pack 100
1.2 µm · 142 mm · pack 20
1.2 µm · 150 mm · pack 20
1.2 µm · 25 mm · pack 100
1.2 µm · 293 mm · pack 25
1.2 µm · 300 x 3000 · pack 1
1.2 µm · 47 mm · pack 100
1.2 µm · 90 mm · pack 25
5 µm · 13 mm · pack 100
5 µm · 150 mm · pack 20
5 µm · 200 x 200 · pack 5
5 µm · 25 mm · pack 100
5 µm · 270 x 3000 · pack 1
5 µm · 47 mm · pack 100
5 µm · 90 mm · pack 25
8 µm · 110 mm · pack 25
8 µm · 13 mm · pack 100
8 µm · 200 x 200 · pack 5
8 µm · 25 mm · pack 100
8 µm · 300 x 3000 · pack 1
8 µm · 47 mm · pack 100
8 µm · 90 mm · pack 25
Tamano de poro 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.22 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.65 0.65 0.65 0.65 0.65 0.65 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 5 5 5 5 5 5 5 8 8 8 8 8 8 8
Tamano de paquete 100 20 20 5 100 25 100 25 20 5 100 25 1 100 25 100 20 20 5 100 25 1 100 25 150 25 100 20 20 5 100 25 1 100 25 100 5 100 25 100 25 100 20 5 100 25 1 100 25 100 20 20 100 25 1 100 25 100 20 5 100 1 100 25 25 100 5 100 1 100 25
Tamano de hoja — — — 200 x 200 — — — — — 200 x 200 — — 300 x 3000 — — — — — 200 x 200 — — 300 x 3000 — — — — — — — 200 x 200 — — 300 x 3000 — — — 200 x 200 — — — — — — 200 x 200 — — 300 x 3000 — — — — — — — 300 x 3000 — — — — 200 x 200 — 270 x 3000 — — — — 200 x 200 — 300 x 3000 — —
Diametro (mm) 13 142 150 — 25 293 47 90 150 — 25 293 — 47 90 13 142 150 — 25 293 — 47 90 47 102 13 142 150 — 25 293 — 47 90 13 — 25 293 47 90 13 142 — 25 293 — 47 90 13 142 150 25 293 — 47 90 13 150 — 25 — 47 90 110 13 — 25 — 47 90
Caudal 5.5 5.5 5.5 5.5 5.5 5.5 5.5 5.5 11.7 11.7 11.7 11.7 11.7 11.7 11.7 33.2 33.2 33.2 33.2 33.2 33.2 33.2 33.2 33.2 33.2 58.2 58.2 58.2 58.2 58.2 58.2 58.2 58.2 58.2 58.2 95.5 95.5 95.5 95.5 95.5 95.5 117.0 117.0 117.0 117.0 117.0 117.0 117.0 117.0 143.0 143.0 143.0 143.0 143.0 143.0 143.0 143.0 186.0 186.0 186.0 186.0 186.0 186.0 186.0 — — — — — — —
Punto de burbuja 90.0 90.0 90.0 90.0 90.0 90.0 90.0 90.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 35.0 35.0 35.0 35.0 35.0 35.0 35.0 35.0 35.0 35.0 21.3 21.3 21.3 21.3 21.3 21.3 13.0 13.0 13.0 13.0 13.0 13.0 13.0 13.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 6.0 6.0 6.0 6.0 6.0 6.0 6.0 — — — — — — —
Espesor 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 110-150 — — — — — — —
tamano — 293mm — — — 293mm — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —