Coated membranes for enthalpy exchange and other applications

摘要

Coated membranes comprise a porous desiccant-loaded polymer substrate that is coated on one surface with a thin layer of water permeable polymer. Such membranes are particularly suitable for use in enthalpy exchangers and other applications involving exchange of moisture and optionally heat between gas streams with little or no mixing of the gas streams through the membrane. Such membranes have favorable heat and humidity transfer properties, have suitable mechanical properties, are resistant to the crossover of gases when the membranes are either wet or dry, and are generally low cost.

主权项

1. A water transport membrane comprising a porous silica-loaded polyethylene substrate with a coating comprising a cross-linked, water permeable, non-ionic polyurethane-polyether polymer formed on one surface thereof, wherein said silica loading is the range of 45% to 80% by weight of said substrate.