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Green Building Bible, Fourth Edition
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Fundamentals: Potential new timber products

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      CommentAuthordjh
    • CommentTimeMay 31st 2022
     
    I just saw a short article in New Scientist https://www.newscientist.com/article/2321116-waste-wood-chemically-recycled-to-produce-material-stronger-than-steel/ that describes a way to make a new product "five times stronger than natural wood and can be made from any timber by-product, including shavings and sawdust". It sounds quite a promising approach to upcycling wood. Sadly the journal it is reported in is one of Elsevier's and I can no longer access it :( I'd appreciate any views about the technique's potential.

    There's a link in the NS article to another, which links to an accessible journal item https://www.science.org/doi/epdf/10.1126/sciadv.abd7342 about a process for making transparent wood that is quite strong. This also sounds like quite a promising new process.
  2.  
    Search for "delignified wood" (they dissolve away the lignin and hemicellulose to leave just the cellulose fibres, which are tough and strong and can be compressed into a useful material, a bit like making paper).

    It has many interesting properties
    https://physicsworld.com/a/delignified-wood-could-help-cool-down-buildings/
  3.  
    I await the cost and C footprint compared to the alternatives. Otherwise looks like a good option.

    If it takes off I suspect it will go the same way as wood pellets for fuel which started off as a waste product but now trees are cut down to process into pellets
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      CommentAuthordjh
    • CommentTimeJun 1st 2022
     
    Posted By: WillInAberdeenSearch for "delignified wood" (they dissolve away the lignin and hemicellulose to leave just the cellulose fibres, which are tough and strong and can be compressed into a useful material, a bit like making paper).

    It has many interesting properties https://physicsworld.com/a/delignified-wood-could-help-cool-down-buildings/

    Yes the point of the new work was to produce similar or better results without removing the lignin, which provides structure and strength, as well as costing resources to remove. It seems all the projects are developments by the same groups in the US and China.
    • CommentAuthorowlman
    • CommentTimeJun 1st 2022
     
    Research may eventually lead to using a similar process with waste straw, although seasonal collection may prove problematic. Many engineered timber products take years to gain acceptance and become mainstream construction alternatives, don't hold your breath.
  6.  
    Posted By: owlmanResearch may eventually lead to using a similar process with waste straw, although seasonal collection may prove problematic.

    I would expect seasonal storage to be on farm. Over here there are already bales of straw on farm with nowhere to go so I don't see a few months on farm storage pending delivery to be a problem.

    However more and more farms are incorporating straw back into the soil (sometimes with added bacteria) to improve soil structure. A bit like bio fuel from cereal - or use it for food, you can only use it once so with every new use for 'waste' product eventually there is not enough waste (back to wood pellets as an e.g.)

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