Flexible micro–nano composite membranes based on a two‐step strategy: charge recovery and efficient gradient air filtration

A two‐step strategy is used to produce micro–nano composite filters that are flexible and exhibit charge recovery. Polytetrafluoroethylene (PTFE) electret powders are incorporated during the process to provide melt‐blown micro–nano membranes with good charge recovery and improved fiber fineness. The...

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