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Article Abstract
Functional fibrous membranes with high mechanical properties are intensively developed for different application fields. In this study, to enhance moisture and air permeability without compromising mechanical strength, a facile float-surface modification strategy is employed to fabricate Janus fibrous membranes with distinct hydrophobicity/hydrophilicity using the high-density polyethylene (HDPE) fibrous membranes. By coating one side of the HDPE fibrous membranes with polydopamine (PDA) and a superhydrophilic polyelectrolyte, the obtained Janus HDPE fibrous membranes demonstrate an excellent water transmission rate (577.61 ± 72.66 g m h), water vapor transmission rate (WVTR, 131.62 ± 24.34 g m h) and gas permeability (17,496 ± 235 m m h bar), which are much better than those commercial membranes (Tyvek with water transmission rate 518.93 ± 23.20 g m h, WVTR 53.09 ± 6.19 g m h, and gas permeability 2,871 ± 145 m m h bar). Further, the Janus HDPE fibrous membranes keep outstanding mechanical strength (17.00 ± 4.26 MPa of tensile strength, 45.49 ± 8.75% of strain at break), and exhibit an asymmetric wettability on each side which is demonstrated by the separation experiments with various oil-water mixtures. This simple modification approach not only improves the serviceability of HDPE fibrous membranes but also offers scalable potential for apparel applications and other industrial applications.
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| http://dx.doi.org/10.1002/marc.202400854 | DOI Listing |
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