"Transparent" Wood Windows May Be In Your Future!

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A close-up look at the transparent wood created by Dr. Lars Berglund and co-authors (Photo Credit: KTH Royal Institute of Technology)

Wood has many great properties that make it the perfect building material — It is cheap, durable, easily available, and most importantly, environmentally sustainable. The one thing it is not, is transparent! Now thanks to a team of scientists at Stockholm's KTH Royal Institute of Technology the versatile material may even be able to add that attribute to its already impressive list.

Lead researcher Dr. Lars Berglund, who heads the Institute's biocomposites division, says he was inspired to create the transparent wood after learning how Japanese researchers had developed a see-through paper for use in flexible display screens for electronic devices. The team began by stripping out the wood's lignin. The naturally occurring complex polymer strengthens cell walls by bonding tightly with the cellulose. This is what makes wood hard and opaque, and also gives the material its characteristic brown color.

Photo Credit: KTH Royal Institute of Technology

The "bleached" lignin-free wood was then infused with a polymer similar to the one used to make Plexiglas and baked at a temperature of 158°F for four hours. The result was a hybrid product that was not only stronger and lighter than the original wood but also, almost transparent. More importantly, it retained the same structure as timber, which means it could easily be used as a substitute for the original material.

The researchers were able to adjust the level of transparency by varying the amount of the polymer injected and also by changing the thickness of the wood. For instance, when they used the technique on an ultra-thin 0.7 mm piece, the resulting wood was 90% transparent. With a thicker, 3.7 mm chunk, the level of transparency dropped to 40%.

While scientists have previously created a see-through wood for small-scale applications like computer chips, "Franken-wood" is the first one being considered for large scale applications. The researchers, who revealed their findings in Biomacromolecules on April 11, envision using the transparent wood in buildings to allow for more natural light, or to create sturdier windows that let in the desired amount of light without sacrificing privacy.

Wood that allows light to pass through could lead to a brighter future for homes and buildings. (Photo Credit: American Chemical Society)

Berglund also thinks the wood could play a significant role in the design of solar panels. The semi-transparent material would be able to retain light longer and give it more time to interact with the conductor, thus resulting in better solar efficiency. Additionally, substituting the currently used silica-based glass with this new product would help solar energy manufacturers improve their carbon footprint and lower the cost.

The team’s next goal is to enhance the transparency of the new material and test the technique on different types of wood. They are also experimenting with ways to scale up the manufacturing process so that the transparent material is cost-effective to make and easy to use.

Resources: Sciencenews, sciencedaili.com,sciencealert.com, Acs.org

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320 Comments
  • demiover 8 years
    wow
    • hookgirl354
      hookgirl354over 8 years
      LOL
      • comforblue
        comforblueover 8 years
        I like the Idea!
        • elsa66771
          elsa66771over 8 years
          it will destroy forest because they have to cut down trees which take homes away from animals which is very important to me!!!!!
          • elsa66771
            elsa66771over 8 years
            Yes it is a cool invention but it will destroy our forest #thumbs down!
            • Trollover 8 years
              LOL
              • #awesomenessover 8 years
                no thanks world!
                • Dogonewshaterover 8 years
                  Normal windows are just fine and cutting down enough trees to make those windows will destroy our forests
                  • nat2512
                    nat2512over 8 years
                    Scientists have made a different way of maki clear wood which is different and like our normal double glazed Windows and or single glazed but these new ones are like wood. The scientists next steps are to enhance the transcapaprancy of the new material then take wit for tests and then test the new technique on different types of wood to create different effects. The scientists are also experimenting on the different types of wood to make proper fully sized Windows. I don't think this will blow out to be a big new thing in the future.
                    • Niamhf2004over 8 years
                      Scientists have made a way of making clear wood which is different and is like our windows but wood. The scientists next steps are to enhance the transparency of the new material and then test out the new the new technique on different types of wood. The scientists are also experimenting on ways to up the scale. I don't really know what I feel about the new transparent wood right now since it is really new to me. But I think it could turn out to be something big in the future.