Here is a biologically inspired development for a membrane that can be used for osmotic power that is more durable than previous membranes.
"Inspired by membranes in the body tissues of living organisms, scientists have combined aramid nanofibers used in Kevlar with boron nitride to construct a membrane for harvesting ocean energy that is both strong like bone and suited for ion transport like cartilage. The research, published December 18 in the journal Joule, overcomes major design challenges for technologies that harness osmotic energy (pressure and salinity gradient differences between freshwater and ocean water) to generate an eco-friendly and widely available form of renewable energy."
https://www.sciencedaily.com/releases/2019/12/191218153539.htm
https://doi.org/10.1016/j.joule.2019.11.010