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Interfacial Bonding-mediated In situ Growth of Bimetallic Metal-Organic Framework (MOF) at Poly(lactic acid) Nanofibers for Enhanced Nanoparticle Capturing
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DOI：10.11777/j.issn1000-3304.2025.25239.png)
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Abstract
En 中文
Poly(lactic acid)(PLA) fiber membranes demonstrate considerable potential for nanoparticle filtration.However, its practical application is largely limited by weak electret performance and insufficient filtration efficiency. Consequently, modification PLA membranes to enhance the filtration performance is of significant importance. This study utilized electrospun PLA nanofiber membranes as the substrate. By a polydopamine (PDA)interfacial modification strategy, an active layer possessing strong adhesion and multiple functional groups was constructed at PLA fiber surfaces. This layer subsequently induced the in situ controllable growth of zinc/cobalt bimetallic-organic frameworks (Zn/Co-MOF), ultimately yielding a bimetallic MOF-functionalized electrospun nanofibrous membrane (BMF-PLA), which was characterized by a hierarchical micro/nano structure and a substantially increased specific surface area. The BMF-PLA membrane exhibited a hierarchical roughness structure,formed by bimetallic MOF nanoparticles uniformly anchored onto the fiber surfaces with robust interfacial bonding. This unique structure significantly enhanced airflow flux and particulate matter filtration efficiency. The BMF-PLA membrane achieved high filtration efficiencies of up to 99.22% for PM2.5 and 97.65% for PM0.3,appealing for air purification applications. This effort provides an effective and feasible surface functionalization strategy for developing high-performance PLA filter materials, offering new insights for designing the next-generation, sustainable and high-performance protective membranes
Keywords:
Electrospun nanofiber membrane
Bimetallic MOF
Polydopamine interfacial modification
Particulate matter filtration
Surface functionalization
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1.2K
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