Hydrophobic and Hydrophilic Membrane Filter
As a membrane filter factory, Hawach provides filter membranes of various pore sizes and sizes and provides sterile and autoclave packaging membranes as well as OEM services.
Hawach filter membrane has accurate pore size distribution, high strength, and flexibility, and the product can ensure repeatability and consistency. The pores of the membrane filter sterilization act as small capillaries.
Hawach Scientific provides a full range of PTFE membrane filters, PVDF filters, nylon membrane filters, MCE, CA, PP, PES, and glass fiber filters, these hydrophobic and hydrophilic filter membranes are convenient for your filtration analysis, clarification, or sterilization. Use hydrophobic filter membranes for filtering gases or non-polar liquids and for moisture barrier applications. Use hydrophilic filter membranes for filtering aqueous solutions or biological samples.
| Hydrophobic Membrane Filter | Hydrophobic PTFE Membrane Filters | The polytetrafluoroethylene membrane is made of PTFE material, which is completely naturally and permanently hydrophobic. Even under very low-pressure differences, it can ensure the unobstructed passage of moist air or other gases, while aqueous solutions cannot pass through. |
| Microporous Glass Fiber Membrane Filters | Glass fiber filter membrane is mainly used in the filter layer and is directly added to the filter membrane to improve filtration efficiency and retention capacity. When filtering viscous liquids that are difficult to filter, such as serum, a multi-layer filtration method is usually used. | |
| PP Membrane Filters | PP is acid and alkali-resistant, wear-resistant, and impact-resistant, has uniform micropore distribution, a large filtration area, and good water permeability. It is widely used in injection cleaning, medicinal liquids, medicinal wines, oral liquids, beverages, daily water, wastewater, air filtration, etc. | |
| PVDF Membrane Filters | Polyvinylidene fluoride (PVDF) filter membrane: Known for its highly non-reactive thermoplasticity and chemical and high-temperature resistance. It has a high affinity for proteins, is suitable for treating and purifying sewage, and is biocompatible. | |
| Hydrophilic Membrane Filter | Cellulose Acetate Membrane Filters | Cellulose acetate membrane (CA) is mainly used for filtration of aqueous solutions, with a high flow rate and thermal stability, and extremely low adsorption rate. The 0.2um membrane is very suitable for the filtration of aqueous solutions, buffers, serum, and culture media. 0.45um membrane is very suitable for the HPLC mobile phase method. |
| Hydrophilic PTFE Membrane Filters | Hydrophilic membrane. Its performance is exactly opposite to that of a hydrophilic membrane. PTFE filter membranes have extremely strong chemical compatibility and are capable of filtering almost all organic solvents and highly corrosive chemicals. | |
| MCE Membrane Filters | MCE filter membrane: It is a representative water membrane and is often used for filtration of aqueous mobile phase. Its high porosity and uniform micropore structure provide a large flow rate while reducing adsorption. | |
| Nylon Membrane Filters | Universal type, Nylon Membrane Filters suitable for pure water samples and water/organic mixed samples. Suitable for most organic solvents and aqueous solutions, can be used for strong acids, 70% ethanol, and methylene chloride, but not for dimethylformamide. | |
| PES Membrane Filters | Good hydrophilic properties and high water flux. PES membrane filter is resistant to heat, acid, and alkali, and has low protein adsorption, making it very suitable for filtering aqueous samples. Suitable for filtration of water-soluble samples, but not suitable for polar solutions such as ketones, esters, oils, and high-concentration acid solutions. | |
| Sterile MCE Gridded Membrane Filters | Suitable for microbial retention and growth, with a microbial resurrection rate of more than 90%. The membrane is equipped with grid lines to facilitate the identification and calculation of colonies without affecting their growth of colonies. |
If you want to cell culture, then CA, PES membrane filter sterilization is your choice. If your experiment requires solvent filtration, gas filtration, or venting, then a PTFE disk membrane filter is just what you need. 0.45 disc nylon membrane filter 47mm is ideal for filtering Ameno acid solutions. GF membrane filter is suitable for pre-filtration and serial filtration. If you are not sure what membrane filter to choose, the membrane filter factory technical support team, equipped with a full analytical testing lab, can help you through the process. As a membrane filter factory, we provide a wide range of filter membranes with a wide range of pore sizes, aseptic and autoclaved packaging membranes, and OEM services.
However, determining which filter material to use based on the fluid or gas type characteristics is critical to feasible peak filtration performance.
Filter membranes are divided into hydrophilic and hydrophobic membranes. When the hydrophilic membrane comes into contact with water, capillary action related to surface tension causes water to spontaneously enter and fill the pores. This way, the filter membrane is easily wetted and allows a large amount of water to flow through the holes.
Once wetted, the hydrophilic membrane will not allow air or other gases to flow in large amounts unless they are applied at a pressure greater than the bubble point of the membrane. When the hydrophobic membrane comes into contact with water, the surface tension will act to drive the water out of the pores. Unless the applied water pressure is greater than the water inlet pressure of the hydrophobic membrane, water will not enter the pores and the hydrophobic membrane will become a barrier to water flow.
Description | Diameter | Micron Rating |
Nylon Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 0.8um 1.0um 3.0um 5.0um 10.0um | 13mm 25mm 47mm 90mm 142mm 293mm |
Hydrophobic PTFE Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 1.0um 3.0um 5.0um 10.0um | |
Hydrophilic PTFE Membrane Disc, non-sterile (unsupported & supported both available) | 0.22um 0.45um | |
PES Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 0.65um 0.8um 1.2um | |
CA Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 0.8um 1.0um 3.0um 5.0um | |
PVDF Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 0.65um 1.0um 3.0um 5.0um | |
MCE Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 0.8um 1.0um 3.0um 5.0um | |
GF Membrane Filter Disc (With Binder) | 0.45um 1.0um 1.6um | 13mm 25mm 47mm 50mm 60mm 90mm 100mm 106mm 120mm 142mm 150mm 200mm 250mm |
GF Membrane Filter Without Binder | 0.7um 1.0um 1.2um 1.5um 1.6um 2.7um | |
PP Membrane Filter | 0.1um 0.22um 0.45um 0.65um 0.8um 1.0um 3.0um 5.0um 10.0um | 13mm 25mm 47mm 50mm 60mm 90mm 100mm 106mm 142mm 150mm 200mm 250mm 293mm |
In a specific experiment, you should choose a filter membrane and filter with a suitable pore size according to your experimental needs for filtration purposes.
0.1μm: Hydrophilic and hydrophobic membranes can remove mycoplasma from the sample.
0.22μm: The filter membrane can remove 99.99% of bacteria and microorganisms, meeting the requirements of GMP or Pharmacopoeia for sterilization, and can also remove very fine particles in samples and mobile phases.
0.45μm: The filter membrane can filter out most of the bacteria and microorganisms, and can meet the general chromatographic requirements for the filtration of conventional samples and the same flow.
0.8μm and above: The filter membrane can filter larger particles of impurities or the pretreatment of difficult or turbid samples. After the pretreatment, the corresponding filter membrane can be selected for filtration.
1-5μm: To filter impurities with larger particles, or for pretreatment of difficult-to-handle turbid solutions, it can be filtered with a 1-5um filter first and then filtered with the corresponding filter.
