Cellulose Acetate Membrane Filters

Cellulose acetate membrane filters are a kind of Millipore filtration and play an important role in membrane separation technology. Mainly used for filtration of the aqueous solution.

Features and functions

Cellulose acetate membrane filters with uniform pore size distribution, and fast filtration rate, can remove bacteria and particles and no desquamation, which plays a prominent role in sterilization and clarity improvement of injection in the pharmaceutical industry, preparation of high purity water in electronic industry, clinical test, environmental protection, and scientific research. Chemical compatibility of cellulose acetate membrane filters is stable in ph4-8, tolerable to most alcohols and oils. The sterilization ways are high-pressure sterilization (121 °C or 134 °C), dry heat sterilization (180 °C), gamma rays, or epoxy ethane fumigation.


Cellulose acetate membrane filters are valued because their properties such as thermal stability, chemical stability, and strength are better than those of mixed cellulose ester membranes. Compared with mixed cellulose ester microporous membrane, nylon membrane and PVDF membrane, cellulose acetate membrane filters have the lowest adsorption.

Characteristics of cellulose acetate membrane filters

1. Less adhesive;
2. Hydrophilic;
3. High production;
4. Dimensional strength stability;
5. Consistent aperture structure.

Cellulose acetate membrane filters are specialized filters made from cellulose acetate, a type of synthetic polymer derived from cellulose, which is a natural compound found in plant cell walls. These filters are commonly used in various laboratory, medical, and industrial applications for separation, filtration, and purification purposes. Here’s an overview of cellulose acetate membrane filters and their uses:

1. Filtration and Separation: Cellulose acetate membrane filters are known for their excellent compatibility with both aqueous and organic solvents. They are used to separate particles, microorganisms, and contaminants from liquids and gases. The filters are available in a range of pore sizes, allowing for precise filtration based on the size of particles to be removed. These filters can effectively capture particles such as bacteria, viruses, particulates, and colloids.

2. Microbiological Analysis: Cellulose acetate membrane filters are widely used in microbiology laboratories for applications like bacterial colony counting and identification. In combination with nutrient agar or other growth media, these filters enable the capture and growth of microorganisms, making it easier to analyze and identify bacterial or fungal species.

3. Environmental Monitoring: Cellulose acetate membrane filters are employed in environmental monitoring to collect and analyze particulate matter from air or water samples. These filters are used to assess air quality, monitor pollutants, and study waterborne microorganisms.

4. Food and Beverage Analysis: These filters are used to clarify and sterilize liquids in the food and beverage industry. They can help remove particles, microorganisms, and unwanted impurities from liquids like juices, wine, beer, and dairy products.

5. Pharmaceutical Applications: In pharmaceutical research and production, cellulose acetate membrane filters are used for tasks such as sterilization of liquids, purification of drugs, and removal of particles from solutions.

6. DNA and Protein Analysis: Cellulose acetate membrane filters can also be used for DNA and protein analysis techniques such as Southern blotting, Northern blotting, and Western blotting. They can immobilize DNA fragments or proteins for subsequent analysis.

7. Dialysis and Ultrafiltration: In medical and biotechnology settings, cellulose acetate membrane filters are used for dialysis and ultrafiltration processes. These filters allow the selective separation of molecules based on their molecular weight, making them useful for concentrating and purifying biomolecules.

8. Hemodialysis: Cellulose acetate membrane filters have been used in the construction of hemodialysis membranes, which are utilized in kidney dialysis machines to help filter waste products from the blood in patients with kidney problems.

9. Laboratory Research: Cellulose acetate membrane filters find applications in various laboratory procedures, including sample preparation, purification, and particle analysis.

It’s important to note that the choice of membrane material, pore size, and other characteristics should be made based on the specific requirements of the application. Cellulose acetate membrane filters are valued for their biocompatibility, low protein binding, and broad chemical compatibility, making them suitable for a wide range of filtration needs.