Stable Properties And Precautions In Application Of Membrane Filter
As a kind of physical separation method, the membrane filtration process is able to separate molecules of different sizes and characteristics by the driving force from the differential pressure between the two sides of the membrane filter. Membrane filtration can help the scientists in the lab save the cost of production, and boost its quality as well.
The basic principle of the membrane filtration is known as the process of the permeate and the retentate, in which a single feed stream can pass through a membrane system which separates it into two streams. The membrane filter is the key to the system which acts like the physical barrier that only allows certain components in the feed stream can go through.
With specific pore size ratings, known as, membrane filters work as the microporous plastic films, retaining the particles which are larger than their pore size. The smaller particles can be retained by other mechanisms.
The liquid or gas which will be filtered determines what kind of membrane filters you should use. You need to check which membranes are chemically compatible with the feed stream. The pore size is also should be considered to get the results you desire. Don’t forget to check the membrane filters for any unusual process conditions which limit the use of a membrane, such as a temperature.
Good Hydrophilicity and Corrosion Resistance
Hawach Scientific nylon microporous membrane is aliphatic nylon, which provides with good hydrophilicity and resistance to acid and alkali. It is not only suitable for an aqueous solution containing acid and alkali, but also suitable for organic solvent. The material is aliphatic nylon, which has good hydrophilicity and resistance to an appropriate concentration of acid and alkali. Moreover, it is suitable not only for an aqueous solution containing acid and alkali but also for organic solvent. The principle of pore size selection is the same as the mixed fiber membrane, that is, nominal pore size varies from 0.65 um、0.45um、0.3um、0.22um and 0.1um, and the diameter is available in 100 mm、150mm、200mm、300mm and 400mm.
Stable Chemical Properties
Hawach membrane filter is suitable for the filtration of aqueous solution and most organic solvents and is suitable for the preparation of many biological agents and other unusable situations. Hawach nylon membrane filter is hydrophilic and it does not need to be pre-wet with extractable solvent when filtering aqueous solution. And it has flexibility, durability, tear, and other properties, and can be sterilized at 121℃ under high pressure. If soaking the filter membrane at room temperature with the various chemical solutions for 72 hours, the appearance of membrane filter occurs no expansion, dissolution, deformation, destruction, or deterioration.
Precautions in Application of Membrane Filter
In order to protect and prolong the service life of the filter membrane, filter paper, or silk cloth of the same size can be placed on the membrane filter to prevent the membrane from breaking. Furthermore, it is better not to sterilize the filter frame together with the filter membrane; otherwise, the filter membrane is brittle and crumpled due to thermal expansion and contraction. And membrane filter should not be soaked in water for a long time, or the filtration performance will be greatly reduced.