Soy-based air filter can deliver better purification than plastic


In Washington, researchers have developed an air filter using soy protein along with bacterial cellulose.

The filter was developed by Washington State University researchers in partnership with a team from the University of Science and Technology Beijing. The work was published in a recent issue of Composites Science and Technology.

Because soy contains many functional chemical groups, including 18 amino groups, there are many opportunities for it to capture pollution. Because the soy-based filters chemically capture pollutants—as opposed to conventional plastic filters that physically filter small particles—they can capture hazardous gases such as carbon monoxide and formaldehyde.

The materials are also cost-effective and biodegradable. The team is also evaluating gelatin- and cellulose-based air filters.