Membrane and Film


Cooling is the fastest-growing end use in buildings, as its energy demand more than tripled between 1990 and 2018 to around 2 000 terawatt hours (TWh) of electricity. Cooling in line with the water-permeating membrane component will greatly improve energy efficiency by more than 50% compared to conventional air cooling without the component. The membrane reduces power consumption due to extracting water vapor from the humid air without release of latent heat.
Surface of CNF was treated with inorganic particles to improve the dispersibility of CNF in hydrophobic polymer.
The inorganic/organic hybrids are prepared by a sol–gel cross-linking process on nanofiber with hydroxyl groups on the surface.

Water permeability of the CNF membrane

In order to improve the dispersibility of CNF in polymer matrix and water permeability of the membrane, the CNF is surface-modified with inorganic nanoparticles.

Thickness-dependency of water permeability

The water permeability of the membrane, which is similar to or thinner than the fibril length, increases sharply.