Apr
17
2014

Nano fiber paper filters can trap viruses

Virus Filter - The fibers of the filter are white and the virus green.
Virus Filter - The fibers of the filter are white and the virus green.Courtesy Björn Syse

Scientists have developed a paper made of cellulose nanofibers that can be used to filter out harmful viruses.

The new filter paper is made with cellulose fibers, a natural component of green plants that gives wood its strength. Cellulose is the main component of plant cell walls, and the basic building block for many textiles and for paper. Cellulose works well for filters because it is inexpensive, disposable, inert, and non-toxic; cellulose is also mechanically strong and stable in a wide range of acid and alkaline conditions.

But normal filter paper can't trap viruses. A virus is tiny, about a thousand times smaller than a human hair. Normal filter paper has pores that are too large to remove tiny viruses. The new nano fiber filter paper is made with cellulose fibers with diameters of less than 100 nanometers. Viruses range in size from 30-50 nanometers, and can be trapped in the nano fiber filter paper.

The research has been conducted at two Swedish universities, Uppsala University and Swedish University of Agricultural Sciences/Swedish National Veterinary Institute.

To read more about this research visit:
http://www.uu.se/en/media/press-release-document/?id=2271&area=3,8&typ=p...

To learn more about nanotechnology, science, and engineering, visit:
www.whatisnano.org

To see other nano stories on Science Buzz tagged #nano visit:
http://www.sciencebuzz.org/buzz_tags/nano

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