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<p>Biomass materials have been widely used in various industries to achieve a carbon-neutral and sustainable society. Here, we show a heterogeneous corn-based precursor strategy that transforms low-value agricultural waste into structural air filters composed of alternating microfibers (2.61 ± 1.11 µm) with grooved surface and nanofibers (0.29 ± 0.18 µm). Utilizing a green solute-solvent system of zein derived from corn and cellulose extracted from corn straw, the process ensures sustainability across raw material sources, fabrication, filtration, and end-of-life degradation. By tailoring relative humidity and incorporating cellulose, an incomplete nonsolvent-induced phase separation is triggered, leading to a corn-based dual-network filter with high filtration performance (&gt;99.99% PM<sub>0.3</sub> removal) and low pressure drop (45 Pa). The life cycle assessment demonstrates that the corn-based filter results in lower carbon emissions and environmental impacts than petroleum-based filters. This work provides a promising pathway toward the development of sustainable and disposable filtration materials.</p>

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Sustainable biomass-based filter for high-efficiency PM0.3 filtration

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月17日

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  • Qingxiang Wang,
  • Zhaoxuan Niu,
  • Wanli Cheng,
  • Ming Yang,
  • Jie Yan,
  • Jiqing Lu,
  • Haijiao Yu,
  • Yiying Yue,
  • Yen Wei,
  • Dong Wang,
  • Shichao Zhang,
  • Bin Ding,
  • Guangping Han

摘要

Biomass materials have been widely used in various industries to achieve a carbon-neutral and sustainable society. Here, we show a heterogeneous corn-based precursor strategy that transforms low-value agricultural waste into structural air filters composed of alternating microfibers (2.61 ± 1.11 µm) with grooved surface and nanofibers (0.29 ± 0.18 µm). Utilizing a green solute-solvent system of zein derived from corn and cellulose extracted from corn straw, the process ensures sustainability across raw material sources, fabrication, filtration, and end-of-life degradation. By tailoring relative humidity and incorporating cellulose, an incomplete nonsolvent-induced phase separation is triggered, leading to a corn-based dual-network filter with high filtration performance (>99.99% PM0.3 removal) and low pressure drop (45 Pa). The life cycle assessment demonstrates that the corn-based filter results in lower carbon emissions and environmental impacts than petroleum-based filters. This work provides a promising pathway toward the development of sustainable and disposable filtration materials.