TY - JOUR
T1 - Electrospun nanofibrous membranes with asymmetric wettability for unidirectional moisture transport, efficient PM capture and bacteria inhibition
AU - Chen, Jiwang
AU - Rao, Yuanyuan
AU - Zhu, Xiao
AU - Wang, Jiaxuan
AU - Tang, Xingbo
AU - Feng, Shasha
AU - Zhang, Feng
AU - Zhong, Zhaoxiang
AU - Xing, Weihong
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/10/15
Y1 - 2022/10/15
N2 - The performance of moisture management, PM capture, and bacteria inhibition are significant for air cleaning materials. Herein, a nanofiber composite PVDF/PAN-CTAB membrane with multiple functions was constructed via a facile electrospinning strategy. Incorporating cetyltrimethyl ammonium bromide (CTAB) in the windward PAN layer simultaneously improved membrane moisture transport rate, antibacterial performance, and PM capture ability. The enhanced moisture management performance was achieved by regulating the microstructure of the nanofibers and the thickness ratio of the asymmetric wetting layers. Hydrophobic-hydrophilic interface superimposed force on water droplets was measured to thoroughly investigate directional water transport behavior. Consequently, the prepared PVDF/PAN-CTAB membrane possesses a water vapor transport rate of >13 kg m−2 d−1, PM0.3 removal efficiency of ≥99% with a low pressure drop of ∼84 Pa, and an E. coli inhibition rate of 99.99%. This work would pave the way for engineering asymmetric wettability structure to improve the moisture management performance of antibacterial air cleaning membrane, and provides a novel scientific sight on directional water transport phenomenon based on force test and analysis.
AB - The performance of moisture management, PM capture, and bacteria inhibition are significant for air cleaning materials. Herein, a nanofiber composite PVDF/PAN-CTAB membrane with multiple functions was constructed via a facile electrospinning strategy. Incorporating cetyltrimethyl ammonium bromide (CTAB) in the windward PAN layer simultaneously improved membrane moisture transport rate, antibacterial performance, and PM capture ability. The enhanced moisture management performance was achieved by regulating the microstructure of the nanofibers and the thickness ratio of the asymmetric wetting layers. Hydrophobic-hydrophilic interface superimposed force on water droplets was measured to thoroughly investigate directional water transport behavior. Consequently, the prepared PVDF/PAN-CTAB membrane possesses a water vapor transport rate of >13 kg m−2 d−1, PM0.3 removal efficiency of ≥99% with a low pressure drop of ∼84 Pa, and an E. coli inhibition rate of 99.99%. This work would pave the way for engineering asymmetric wettability structure to improve the moisture management performance of antibacterial air cleaning membrane, and provides a novel scientific sight on directional water transport phenomenon based on force test and analysis.
KW - Air filtration
KW - Asymmetric wettability
KW - Directional water transport
KW - Electrospun nanofibrous membrane
KW - PM removal
UR - http://www.scopus.com/inward/record.url?scp=85138538452&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2022.121006
DO - 10.1016/j.memsci.2022.121006
M3 - 文章
AN - SCOPUS:85138538452
SN - 0376-7388
VL - 662
JO - Journal of Membrane Science
JF - Journal of Membrane Science
M1 - 121006
ER -