A simple method for preparation of macroporous polydimethylsiloxane membrane for microfluidic chip-based isoelectric focusing applications
Abstract(#br)A new, simple method was reported to prepare PDMS membranes with micrometer size pores for microfluidic chip applications. The pores were formed by adding polystyrene and toluene into PDMS prepolymer solution prior to spin-coating and curing. The resulting PDMS membrane has a thickness of around 10\u003cce:hsp sp=\"0.25\"/\u003eμm and macropores with a diameter ranging from 1 to 2\u003cce:hsp sp=\"0.25\"/\u003eμm measured using scanning electron microscope (SEM) imaging.