A novel polyethylene microfiltration membrane with highly permeable ordered ‘wine bottle’ shaped through-pore structure fabricated via imprint and thermal field induction

摘要: A novel microfiltration membrane with ordered 'wine bottle' shaped through-pores from inexpensive thermoplastic linear low-density polyethylene (LLDPE) was fabricated via imprint and thermal field induction. At 110 °C, a softened bilayer top LLDPE film on bottom polymer buffer layer imprinted by silicon micropillar array template. Under an optimized pressure of 1.4 MPa, the micropillars penetrated through into layer, forming cylindrical (pore diameter: 2 μm) in without damaging The establishment this can effectively avoid problem residual which usually exists conventional single-layer imprints hinders formation perforation. After imprint, laid flat smooth glass substrate heated homogeneous 140 °C melted. melt spread over substrate, inducing shrinkage pores. With increase heating time, versus surface change thickness porosity were studied. 90 s, thin size: 1 μm 450 nm surface) be achieved. experimental results pure-water permeation separation bacteria–water oil–water have demonstrated excellent performance membrane.