Hierarchically heterogeneous interface structuring strategy for microenvironment-regulating and self-decontaminating biodegradable meta-membranes.
basic_science · Level V
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- Record sourced from PubMed, PMID 42103746.
- Also identified by DOI 10.1038/s41467-026-72873-z.
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Abstract
Precise functionalization of heterogeneous interfaces in nanofibers is essential for advanced personal protective membranes. Here, we demonstrate a hierarchically heterogeneous interface structuring (HHIS) strategy to fabricate microenvironment-regulating and self-decontaminating meta-membranes (MRSD-PLA) by embedding zeolitic imidazolate framework-8 (ZIF-8) nanocrystals within poly(lactic acid) (PLA) fibers and anchoring F-TiO<sub>2</sub> nanoblocks on their surfaces, creating an electronegativity contrast that directs electron migration and charge redistribution. ZIF-8 of porosity and electroactivity could enable charge capture/storage and trans-membrane transport (water vapor transmission rate: 4018 g·m⁻<sup>2</sup>·d⁻<sup>1</sup>; air permeability > 60 mm·s⁻<sup>1</sup> at 100 Pa). Combined with the hydrophobicity and self-cleaning capability from F-TiO<sub>2</sub>, a sustained charge migration establishes a closed-loop capture-storage-regeneration cycle. This results in self-powered sensitive monitoring and a high PM<sub>0.3</sub> filtration efficiency of 99.3% yet a low pressure drop of 51.9 Pa (quality factor: 0.11 Pa⁻<sup>1</sup>). Moreover, MRSD-PLA inhibit bacterial growth and balance robust mechanical strength with biodegradability, showcasing great potential for high-performance personal protection.