Biofoam definition
Biofoam. The last production method is dedicated to a steam-generation membrane, produced by mixing together nanocellulose produced in situ by bacteria, and reduced graphene oxide flakes mixed in the cell culture media. By freezing the obtained hydrogel, a aerogel composed by nanocellulose and reduced graphene oxide flakes is obtained (▇▇▇▇▇ et al., 2016). Production of membranes seems to be limited to wet approaches. Once graphene is fixed in polymers, there should be no risk of exposure for workers, as experience with other nanocomposites may suggest. However, there is no direct information about graphene release from finished products. Since we have no information about scale-up processes for the methods shown here, or in general for the preparation of industrial scale amounts of membranes, exposure in this phase is difficult to estimate. The target is anyway the workers.