Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (2): 20250243.doi: 10.7503/cjcu20250243

• Polymer Chemistry • Previous Articles     Next Articles

Active Poly(lactic acid) Nanofibrous Membranes for Enhanced PM Filtration and CO2 Adsorption

HU Shuda1,2, DONG Lining3, WANG Cunmin2, LI Xinyu2, WANG Shaozhen2, LI Shihang1,2(), ZHANG Shenghui3, XU Huan3   

  1. 1.Carbon Neutrality Institute
    2.School of Safety Engineering
    3.School of Materials Science and Physics,China University of Mining and Technology,Xuzhou 221116,China
  • Received:2025-08-31 Online:2026-02-10 Published:2025-12-17
  • Contact: LI Shihang E-mail:shihangli@cumt.edu.cn
  • Supported by:
    the Natural Science Foundation of Jiangsu Province(Youth Project), China(BK20241648);the China Postdoctoral Science Foundation(2024M763559);the National Natural Science Foundation of China(52174222)

Abstract:

Biodegradable poly(lactic acid)(PLA) nanofibrous membranes(NFMs) can alleviate plastic pollution, aid in air quality improvement, and have gained significant attention in particulate matter(PM) filtration. However, they inherently lack gas selectivity; moreover, insufficient electroactivity and rapid charge dissipation lead to unstable PM filtration efficiency, which seriously restricts their development prospects. Herein, we employed a microwave-assisted method to fabricate high-selectivity active nanocrystals(HSANs), which were then integrated into PLA NFMs using a combined electrospinningelectrospray strategy, resulting in high-selectivity active(HSA) NFMs with a hierarchical porous structure. With the uniform, affinitive anchoring of HSANs(2%, 4% and 8%, mass fraction), the HSA NFMs thus obtained showed a significant increase in surface potential(up to 7.6 kV) and dielectric constant(1.68). Meanwhile, endowed with pronounced activity and optimized morphology, HSA NFMs exhibited PM2.5 and PM0.3 filtration efficiencies of 99.8% and 99.5% at 85 L/min, markedly outperforming Pure PLA(only 83.5% and 82.7%, respectively). Moreover, the prepared HSA NFMs exhibited excellent CO2 adsorption performance. Specifically, HSA-8 achieved the highest capacity of 57.2 cm3/g at 273.15 K/1.0 bar(1 bar=100 kPa), and its CO2/N2 selectivity of 40 was confirmed via ideal adsorbed solution theory(IAST) simulation. The proposed methodology exhibits an outstanding integration of high-efficiency CO2 capture and superior air filtration, which may facilitate the development of eco-friendly and functional protective membranes.

Key words: Nanofibrous membrane, Highly selective active nanocrystal, Simultaneous filtration and removal, Selective adsorption

CLC Number: 

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