Filtration

The filtration of nanoparticles and submicron particles is an important problem in industry and health protection. One of the methods which can be used to solve this problem is to use nonwoven nanofibrous filters. Electrospun fibers have been used in high efficiency filters for over two decade because they are responsible for better performance of the filters. 

Since the channels and structural elements of a filter must be matched to the scale of the particles or droplets that are to be captured in the filter, one direct way of developing high efficient and effective filter media is by using nanometer-sized fibers in the filter structure. In general, because of the very high surface area to volume ratio and resulting high surface cohesion, tiny particles can be easily trapped in the electrospun nanofibrous structured filters and hence the filtration efficiency can be improved.

Modern processing techniques in fiber technology combined with novel polymer materials results in new products. Electrospinning is one of the methods to prepare nanofibers of polymer or polymer composite materials. Membranes made out of these nanofibers can be used in variety of applications like filtration, tissue engineering, drug delivery etc. The membrane properties are governed by their surface properties and pore distribution, as well as their morphology.

References:

Xiao-Hong Qin, Shan-Yuan Wang. Filtration properties of the electrospinning nanofibers. J Appl Polym Sci 102: 1285–1290, 2006.

Lackowski M, Krupa A, Jaworek A. Non woven filtration mat production by electrospinning method. J. Phys.: Conf. Ser. 301 012013, 2011.

Rajesh KP, Natarajan TS. Electrospun polymer nanofibrous membrane for filtration. J Nanosci Nanotechnol. 2009 Sep;9(9):5402-5.

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