


What is it?

Just so everyone’s on the same page, “sand” is simply soil defined by grain-sizes between 0.0625mm and 2mm. The actual material is largely irrelevant to be classified as sand. Panasonic sand is no different in this regard. What sets it apart, however, is that each grain has a special film around it to a thickness on the order of nanometers.

This substance effectively makes volumes of the sand waterproof by using the water’s surface tension to hold it together in a large mass rather than have it break down and seep through like it does with regular sand. Because this surface tension is unique to water, other substances like oxygen can still pass through freely. That might not sound like a lot, but the potential is huge.

What can it do?

In a test farm done by Panasonic with the help of the Kyoto University Graduate School of Agricultural Science they were able to increase the yield of a tomato crop by 40 percent. They did this by first creating a layer of waterproof sand between the ground water and topsoil. As water is added to the field it seeps down into the ground but is caught by the Panasonic sand before going too deep.

Since the waterproof sand layer was created on an incline, the water could be easily funneled into a reservoir to be used again on the same field. This process had an added benefit of recycling fertilizer rather than applying more thus cutting costs.

While this is great in a small field in Japan, the effects could really become something special in the ever-growing arid regions of the world. With little rainfall, it’s hard to grow anything of use, and in many places the groundwater is so high in salt that it acts like a sponge pulling away any water added from the surface before it can be used.

Panasonic sand not only blocks the fresh water from getting absorbed into the salt water but it can prevent the salt water from contaminating the fresh water allowing it to be reused for long periods of time. As a result the widespread usage of this sand could conceivably reverse the desertification of the world.

What’s the catch?

We don’t know, honestly. According to Panasonic this sand can be produced without any specialized equipment and cheaply. They say if produced locally, an area can get it for only a few thousand yen (a few dozen US dollars) per ton.

In addition, further applications have only just begun to come up. For example, senior researcher Norihisa Mino speculates it could be used to hold quantities of water under paved roads keeping them cool during the summer months and helping to curb urban heat islands.

The porous nature of Panasonic sand allows it to have less impact on the environment than other materials like concrete but also gives it potential in filtration systems. For example a desalinization plant could use it to process fresh water during times of shortage.

Why Panasonic?

An equally impressive thing about Panasonic sand is the example it sets for thinking outside the box. After all, from a company more known for its appliances and a head researcher who specializes in semiconductor manufacturing techniques, you’d hardly expect an agricultural game-changer.

The main ingredient of Panasonic sand was actually developed way back in 1994. Back then it was used as a protective film on the inside of rice cookers to prevent staining. Its success led to use on other products like microwave and toaster oven doors, but not much else from there. Still, Mino continued searching for something else that this stuff could be used on.

Years of looking came to a head when Mino consulted with Kyoto University and discovered its potential for agricultural use. The substance’s ability to both hold water and prevent salt damage piqued the interest of those in agronomy and work was underway.

We would say that the rest is history but really it’s the future. There is still testing to be done but if everything checks out we may see the once famous electronics company change to a completely different field after Panasonic celebrates its 100th anniversary in 2018.

Source: Sankei Biz (Japanese)
Top Image: Wikipedia – Siim Sepp