| 摘要 |
<p>The present invention concerns a semi-permeable membrane consisting of one thin layer of a non-porous material(the diffusion skin), and one or more layers of a porous material (the porous layer), where the porous layer has a structure where porosity ζ, pore length x(m), and tortuosity τ, are related to one another as given by the expression: x τ = ζ S wherein S is a structure parameter. Further a method for providing elevated pressure by osmosis as well as a device for providing an elevated osmotic pressure and electric power is described.</p> |
