Water-Soluble Circuit Boards Could Revolutionize E-Waste Recycling

Things labeled “just add water” are usually highly-processed foods and novelty bath tub toys, but new research from the UK’s National Physical Laboratory may change all of that. Working together with In2Tec and Gwent Electronic Materials, NPS has developed a 3D printable circuit board that dissolves when immersed in hot water.

The technology was created as part of the UK’s ReUSE (Reuseable, Unzippable, Sustainable Electronics) project which aims to increase the recyclability of electronic devices. Although the circuit board is merely printed, it has been shown to withstand heat and other pressures of real life use. Yet, when the hypotheical device breaks down, disposing of the non-recyclable parts is as easy as adding water.

REUSE Dissolving Circuit Board

Image via NPL/YouTube Video

According to the NPL, researchers developed and tested a series of unzippable polymeric layers which, while withstanding prolonged thermal cycling and damp heat stressing, allow the assemblies to be easily separated at end-of-life into their constituent parts, after immersion in hot water. The project demonstrated a 90 percent recyclable inverter circuit for an electroluminescent lamp dissolving in a small amount of hot water.

While this application of 3D printing won’t make electronic devices more resilient or eaiser to repair, in fact, quite the contrary, it does bode well for the planet. Electronics waste is the fastest growing waste stream in the world, and traditional recycling methodologies aren’t capable of keeping up. According to the NPL, the water-soluble technology lends itself readily to rigid, flexible and 3D structures, which will enable the electronics industry to pursue new design philosophies – with the emphasis on using less materials and improving sustainability.

Beth Buczynski is a freelancer writer and editor currently living in the Rocky Mountain West. Her articles appear on Care2, Ecosalon and Inhabitat, just to name a few. So far, Beth has lived in or near three major U.S. mountain ranges, and is passionate about protecting the important ecosystems they represent. Follow Beth on Twitter as @ecosphericblog


  • Reply November 6, 2012


    Sounds like some engineers wet dream.
    Gee, the hot water tank in the attic leaked and my smart house doesn’t work anymore

  • Reply November 9, 2012

    GREENspot DROPoff

    Pretty cool! We can’t help but wonder if the water is safe to go down the drain…

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