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International Journal of Biological Macromolecules

International Journal of Biological Macromolecules

IF: 7.7
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High-efficiency respiratory protection and intelligent monitoring by nanopatterning of electroactive poly (lactic acid) nanofibers

Published:12 December 2024 DOI: 10.1016/j.ijbiomac.2024.138769 PMID: 39674489
Liang Jiang,?Long Zhang,?Xinjian He,?Mengke Tang,?Cunmin Wang,?Chao Xu,?Xiang Li,?Xuanjin Zhu,?Ruizi Chen,?Yifan Zhang,?Jiang Shao,?Mingming Zhang,?Yabin Zhu,?Huan Xu

Abstract

The advent of multifunctional nanofibrous membranes (NFMs) has led to the development of next-generation air filters that are ready to intercept fine particulate matters (PMs) and monitor the respiratory diseases. However, it is still challenging to fabricate biodegradable NFMs featuring the desirable combination of high filtration efficiencies, low air resistance, and intelligent real-time monitoring. Herein, a hierarchical nanopatterning approach was proposed to functionalize the stereocomplexed poly(lactic acid) (PLA) (SC-PLA) nanofibers via the combined electrospinning of SC-PLA and electrospray of CNT@ZIF-8 nanohybrids. The nanopatterned SC-PLA (NSC-PLA) NFMs were characterized by largely increased surface activity and electroactivity, as evidenced by the nearly two-fold increase in surface potential (up to 7.3?kV) and substantial improvements in the dielectric properties. Furthermore, the NSC-PLA NFMs exhibited excellent tribo-output performance, yielding a voltage of as high as 13.5?V for NSC-PLA NFMs loaded 10?% nanohybrids (NSC-PLA10). In particular, the exceptionally high electroactivity and unique protrusion structure together contributed to promote the filtration efficiencies, while providing a low pressure drop (e.g., 96.1?% for PM2.5 and 88.3?% for PM0.3, only 67.6?Pa of NSC-PLA10, at 32?L/min). More importantly, NSC-PLA NFMs enabled real-time monitoring of physiological signals during different respiratory states, as evidenced by the output voltages of 17.2, 32.9 and 37.5?mV for normal breath, fast breath and cough recorded by NSC-PLA10. The proposed NSC-PLA NFMs show enormous potential in the fields of air filtration and real-time respiratory monitoring, thus providing ecofriendly solutions to personal health management.

Substances (3)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Dichloromethane 75-09-2 CH2Cl2 1289 suppliers $8660.00
N,N-Dimethylformamide 68-12-2 C3H7NO 1215 suppliers $11.20-$12200.00
Hexadecyl trimethyl ammonium bromide 57-09-0 C19H42BrN 844 suppliers $6.00-$19422.00

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