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<p>Green solvent strategies are increasingly important for advancing sustainable polymer processing and deepening the understanding of structure–property relationships. In this work, we report a coaxial electrospinning approach that employs dimethyl sulfoxide and ethyl acetate as environmentally benign solvents to fabricate nanofibers composed of polyvinyl alcohol (PVA) cores and poly(L-lactic acid) (PLLA) shells. Comprehensive morphological and physicochemical characterization confirmed the successful formation of uniform, defect-free core–shell architectures. Comparative transport studies revealed clear architecture-dependent behavior: uniaxial PVA fibers displayed rapid burst release, PLLA-only fibers acted as complete diffusion barriers, and coaxial PVA/PLLA fibers enabled finely tunable, diffusion-controlled transport over extended timescales. These findings establish direct links between solvent choice, processing architecture, and transport properties in biodegradable nanofiber systems. This study provides both a scalable eco-conscious electrospinning strategy and a fundamental framework for correlating processing, morphology, and mass transport in polymeric materials.</p> Graphical Abstract <p></p>

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Green Solvent-Assisted Coaxial Electrospinning of PVA/PLLA Nanofibers with Tailored Morphology and Diffusion-Controlled Transport

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月28日

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  • Rubén Martín-Cabezuelo,
  • María-Antonia Serrano,
  • Enrique Barrajón-Catalán,
  • Lara Peral Ballester,
  • José Antonio Gómez-Tejedor

摘要

Green solvent strategies are increasingly important for advancing sustainable polymer processing and deepening the understanding of structure–property relationships. In this work, we report a coaxial electrospinning approach that employs dimethyl sulfoxide and ethyl acetate as environmentally benign solvents to fabricate nanofibers composed of polyvinyl alcohol (PVA) cores and poly(L-lactic acid) (PLLA) shells. Comprehensive morphological and physicochemical characterization confirmed the successful formation of uniform, defect-free core–shell architectures. Comparative transport studies revealed clear architecture-dependent behavior: uniaxial PVA fibers displayed rapid burst release, PLLA-only fibers acted as complete diffusion barriers, and coaxial PVA/PLLA fibers enabled finely tunable, diffusion-controlled transport over extended timescales. These findings establish direct links between solvent choice, processing architecture, and transport properties in biodegradable nanofiber systems. This study provides both a scalable eco-conscious electrospinning strategy and a fundamental framework for correlating processing, morphology, and mass transport in polymeric materials.

Graphical Abstract