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Related Experiment Video

Updated: Mar 24, 2026

Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation
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Optically Transparent Wood from a Nanoporous Cellulosic Template: Combining Functional and Structural Performance.

Yuanyuan Li1, Qiliang Fu1, Shun Yu1

  • 1Wallenberg Wood Science Center, Department of Fiber and Polymer Technology, and §School of Information and Communication Technology, KTH Royal Institute of Technology , SE-10044 Stockholm, Sweden.

Biomacromolecules
|March 5, 2016
PubMed
Summary

Researchers created optically transparent wood (TW) by removing lignin and infusing it with methyl methacrylate (MMA). This strong, lightweight material offers tunable optical properties for applications like windows and solar cells.

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Biomaterials

Background:

  • Wood's opacity limits its use in applications requiring light transmission.
  • Lignin, a major wood component, absorbs light and contributes to opacity.
  • Developing novel transparent materials is crucial for energy-efficient buildings and advanced optical devices.

Purpose of the Study:

  • To develop a novel optically transparent wood (TW) material.
  • To investigate the optical and mechanical properties of TW.
  • To explore potential applications of TW in construction and energy.

Main Methods:

  • Delignification of wood to create a nanoporous template.
  • Impregnation of the wood template with refractive-index-matched methyl methacrylate (MMA).
  • Characterization of optical properties (transmittance, haze) and mechanical properties.

Main Results:

  • Achieved optically transparent wood with 85% transmittance and 71% haze.
  • Preserved the hierarchical wood structure during processing.
  • Demonstrated tunable optical properties by adjusting cellulose volume fraction.
  • Observed enhanced mechanical properties due to the wood-PMMA synergy.

Conclusions:

  • Optically transparent wood is a viable material with high transmittance and tunable properties.
  • The developed TW material is lightweight, strong, and suitable for structural applications.
  • Potential applications include light-transmitting buildings and transparent solar cell windows.