BARRIER WITH SUPERHYDROPHOBIC COATING

摘要

A barrier of open pore mesh provided with a superhydrophobic coating to prevent wetting when exposed to an aqueous liquid. The disclosed barrier could be a mesh screen or a liquid pervious membrane.The barrier is useful in a filter media containment(canister) to permit egress of gas, usually air, from the containment even when subjected to an aqueous liquid containing environment. The canister (10) comprises: a housing having a fluid inlet and a fluid outlet (13); a filter medium housed within said canister; a separate passage for egress of a gaseous medium; a gas pervious barrier (42), said barrier coated with a superhydrophobic layer.