Filtration Device Uses Hydrogel Filter With Nanocellulose Fibers

Researchers from the University of Texas in Austin (UT Austin) developed a low-cost and portable injectable water filtration system that could help improve global access to clean drinking water

As was detailed in the team's work published in Nature Sustainability, the new portable filtration device uses an intertwined web of nanocellulose fibers incorporated in a hydrogel film. This film contains a microporous membrane support to boost the system's filtration efficiency.

"Our system, with its high efficiency in removing diverse types of particles, offers an attractive yet practical solution in improving freshwater availability," said Prof. Guihua Yu of UT Austin

The system collects contaminated water into its syringe and injects it into the hydrogel filter. Hydrogel film and microporous membrane combination traps contaminants, particles, and microplastics.

Conventional filtration systems use filter papers and microporous membranes. However, these filtration methods could remove only 40% and 80% of particles larger than 10 nanometers. Test results with the new system showed it could filter out nearly 100% of particles.

This injectable water filtration device is also sustainable, portable, and affordable. Researchers said the hydrogel filters are made from readily available materials. They degrade easily and can be used 30 times before needing replacement.

Read the full article here to learn how they tested their new filtration system and their plans for large-scale applications

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