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Tailoring Unidirectional Water‐Penetration Janus Fabric with Surface Electrospun Deposition
Author(s) -
Zhao Jinchao,
Xu Zhaobao,
Liu Shake,
Zhang Teng,
Huang Leping
Publication year - 2021
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.202000578
Subject(s) - polyester , materials science , antistatic agent , penetration (warfare) , polyvinyl alcohol , composite material , janus , chemical engineering , coating , electrospinning , contact angle , porosity , polymer chemistry , nanotechnology , polymer , layer (electronics) , operations research , engineering
This paper provides a new method to fabricate an integrated Janus fabric that has excellent unidirectional water‐penetration property. Based on commercial polyester fabric that is pretreated with CaCl 2 solution, polyvinyl alcohol/sodium alginate (PVA/SA) solution is deposited directly on the fabric via electrospinning and in situ chelated with Ca 2+ contained in the fabric. The in situ formed PVA/SA gel coating not only transfers the surface of polyester fabric from hydrophobic to hydrophilic but also retains original porous structure of polyester fabric. As the water droplet contacts with unelectrospun side of modified polyester fabric (M‐PET) pretreated with 10 wt% CaCl 2 , it penetrates through the M‐PET within 1 s from unelectrospun side to electrospun side after application, and disappears on unelectrospun side within 2 s, and in turn, droplet spreads out on electrospun side of M‐PET within 2 s after application and no penetration occurs. The M‐PET pretreated with CaCl 2 solution has outstanding antistatic property, vapor, and air permeability. The impact of ratio (v/v) of the PVA and SA solution and the concentration of CaCl 2 pretreating solution on properties of the M‐PET are investigated.