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<p>Indoor humidity regulation is critical for human health, yet conventional electrical systems remain energy-intensive. While wood’s natural hygroscopicity offers passive humidity control, its limited adsorption capacity restricts practical applications. This study presents a passive humidity-regulating wood composite synergizing metal–organic frameworks (MOFs) with laser-drilled wood substrates to overcome these limitations. Through systematic screening of MOFs (HKUST-1, MIL-100(Fe), MIL-101(Cr)), MIL-101(Cr) was selected due to its hierarchical porosity and S-shaped isotherms in the critical 40–60% relative humidity (R.H.) range. The MIL-101(Cr)@wood composite exhibited a 287% enhancement moisture adsorption versus native wood at 50% R.H. Crucially, the composite suppressed bacterial proliferation after 480&#xa0;min of exposure to 95% R.H., mitigating bacterial risks inherent to extreme high humidity indoor environment (using <i>E. coli</i> as a model microorganism). This work advances sustainable building technologies, positioning wood-based composites as promising candidates for innovative ventilation system designs that promote healthier indoor environments.</p> Graphical abstract <p></p>

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Passive humidity-regulating wood composite toward health-friendly indoor environments

  • 期刊论文

  • 发表日期：

    2026年1月16日

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  • Kunkun Tu,
  • Ronghua Yu,
  • Jinjing Liu,
  • Kaimin Hua,
  • Christopher H. Dreimol,
  • Zhidong Zhang,
  • Roman Günther,
  • Wenjie Ge,
  • Shihang Li

摘要

Indoor humidity regulation is critical for human health, yet conventional electrical systems remain energy-intensive. While wood’s natural hygroscopicity offers passive humidity control, its limited adsorption capacity restricts practical applications. This study presents a passive humidity-regulating wood composite synergizing metal–organic frameworks (MOFs) with laser-drilled wood substrates to overcome these limitations. Through systematic screening of MOFs (HKUST-1, MIL-100(Fe), MIL-101(Cr)), MIL-101(Cr) was selected due to its hierarchical porosity and S-shaped isotherms in the critical 40–60% relative humidity (R.H.) range. The MIL-101(Cr)@wood composite exhibited a 287% enhancement moisture adsorption versus native wood at 50% R.H. Crucially, the composite suppressed bacterial proliferation after 480 min of exposure to 95% R.H., mitigating bacterial risks inherent to extreme high humidity indoor environment (using E. coli as a model microorganism). This work advances sustainable building technologies, positioning wood-based composites as promising candidates for innovative ventilation system designs that promote healthier indoor environments.

Graphical abstract