We Can Now Make Cables From Wood That Will Degrade On Its Own When Thrown Away

Dhir Acharya - Dec 06, 2019


We Can Now Make Cables From Wood That Will Degrade On Its Own When Thrown Away

Wood-base fiber cables will save us from dumpsters filled with electronics waste that takes thousands of years to degrade if they ever do.

Technology is developing quickly, meaning the device you’re using now may be thrown away in a year, or even months if you like catching up with new tech that’s coming out every day. But that has led to dumpsters filled with electronic waste that is rarely recycled properly, hence damages to the environment and a waste of resources.

With that in mind, researchers from Finland has come up with a way to create fiber optics using wood-based fibers that will break down itself when thrown away.

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Optical fibers are currently made from plastic or glass

Fiber optic cables are the secret behind modern tech electronics and devices. While metal wires carry electrical signals, optic cables consist of long, thin, plastic or glass threads transmitting pulses of light for kilometers, which connects countries, cities, and data centers. Pulses of light are not flowing electrons, they travel down the optic cables using the total internal reflection process in which photons bounce off the transparent fibers’ inner walls and remain inside the fibers as they travel from one and of the fiber to the other.

To transmit data with the fewest errors possible, the fibers need to be perfect optically, which seems impossible for wood-based fibers. However, wood is not necessarily opaque, and photons can pass through it depending on the thickness, its moisture, as well as what materials are added to it.

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Fibers made from wood degrade on their own when disposed of

The researchers at VTT Technical Research Centre of Finland has created optic fiber cables from wood-based cellulose: a structural material that enables plants to stand up straight. In the manufacturing process, the research team had to treat the material with salt-based ionic solvents, then they wrap it with a cellulose acetate outer layer that has a lower infraction index compared to the core. The result is that, in plastic or glass fiber optic cables, photons bounce around inside the cable and stay trapped.

But it will take wood-based fiber cables long to completely replace the existing materials and its current ability to transmit pulses of light is not as good as plastic or glass. However, it has its unique characteristics making it useful for various applications as the researchers make it perform better. Fibers made from wood can absorb water, which impacts its ability to transmit pulses of light. But from that, we can see an application immediately, which is moisture sensors for wood-based structures as well as other materials not resistant to water.

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