Joyce's Choice of the Day

Hemp fibres ‘better than graphene’









The waste fibres from hemp crops can be transformed into high-performance energy storage devices, scientists say.

They “cooked” cannabis bark into carbon nanosheets and built supercapacitors “on a par with or better than graphene” – the industry gold standard.

Electric cars and power tools could harness this hemp technology, the US researchers say.

They presented their work at the American Chemical Society meeting in San Francisco.

“People ask me: why hemp? I say, why not?” said Dr David Mitlin of Clarkson University, New York, who describes his device in the journal ACS Nano.

“We’re making graphene-like materials for a thousandth of the price – and we’re doing it with waste.

In countries including China, Canada and the UK, hemp can be grown industrially for clothing and building materials.

But the leftover bast fibre – the inner bark – typically ends up as landfill.

Dr Mitlin’s team took these fibres and recycled them into supercapacitors – energy storage devices which are transforming the way electronics are powered.
Releasing this torrent requires electrodes with high surface area – one of graphene’s many phenomenal properties.

Stronger than diamond, more conductive than copper and more flexible than rubber, the “miracle material” was the target of a £50m investment by UK Chancellor George Osborne.

read more original article BBC News


Joyce's Recent Choices

New technology automatically sorts plastics for recycling

              Plastics are everywhere and for each different application, there is a different type of polymer that suits those needs. Most plastics can be recycled, but first they must be sorted by type which is done by hand at waste processing facilities and is time-consuming. A new technology developed by researchers at Ludwig Maximilians Universitat in Munich aims to speed up that process and make plastic sorting more efficient so that more plastics can...


Joyce's Recent Choices

Unlimited Solar Powered Light in a Bottle!

                In big cities we take for granted how easy it is to use electrical light, but over a billion people living in developing countries and rural areas don’t have access to the power grid. In rural India, if someone wants to study at night or walk home in the dark, they’ll often have to light a kerosene lamp, which is expensive to maintain and smoky, plus it’s a pretty dangerous fire hazard if it’s accidentally tipped over. So...


Joyce's Recent Choices

Eco Toilet:Recycle the water from the washbasin

                        The Eco Toilet allows you to recycle the water from the washbasin. The washbasin water and regular fresh water are used for flushing. It sounds like a simple and very good idea. We use water to wash our hands and teeth and for other purposes as well and we also need water for the toilet. So why not recycle? Of course, as you can imagine, in order to do that a more complicated design is needed. The Eco Toilet...


Joyce's Recent Choices