What is a foam?
A foam is a substance in which gas is trapped in a liquid or a solid in pockets. There are many types of foams - for example, those used by firefighters (mostly to combat burning oils). A bread is also, at least formally, a type of foam.
Graphene foams are usually made by growing graphene using a CVD process on a 3D metal foam (structure). The metal is then removed which leaves the graphene 3D foam.
Graphene foams are somewhat similar to graphene aerogels, in which the liquid part of the gel is replaced by a gas (usually air).
Graphene foams are now available commercially, contact us for details.
The latest graphene foam news:
A Penn State-led international research team (led by Professor Huanyu “Larry” Cheng at Penn State) recently published two studies that could boost research and development of future motion detection, tactile sensing and health monitoring devices.
There are various substances that can be converted into carbon to create graphene through laser radiation, in a process called laser-induced graphene (LIG). The resulting product can have specific properties determined by the original material. The team set out to test this process and has reached interesting conclusions.
Graphene foam assists in building a "thermal switch" that dynamically moderates heat of electronic devices
lithium ion batteries used in extreme heat or cold can be prone to malfunctions and low performance. Purdue University engineers have developed a solution: a "thermal switch" made of compressible graphene foam, that dynamically adjusts to temperatures both inside and outside the device to maintain consistent thermal management.
“As electronic devices get smaller and more powerful, managing heat becomes a more crucial issue,” said Xiulin Ruan, professor of mechanical engineering, who studies nanoscale heat transfer and sustainable energy. “Most devices use passive thermal management, such as conduction and convection, to move excess heat. But this system isn’t tunable or adjustable, and doesn’t help at all in cold conditions.”
Integrated Graphene (formerly known as RD Graphene), developers of hyper-sensitive 3D graphene foam electrodes, have set their aims on the human diagnostics market and are aiming to enable better biosensors with improved performance and speed. The company has launched its flagship 3D graphene foam process in their first product, Gii-Sens.
The company launched its first product in conjunction with its new Integrated Graphene brand, in hopes that these steps will mark the first steps on an ambitious commercial journey to establish themselves as a leading producer of pure 3D graphene foam. In addition, the Company led a funding round in which it has raised £3.1 million (almost USD$4 million). This latest investment round follows £300,000 in seed funding from six private investors in March 2019, plus a variety of grant funding totaling £1.8m raised since 2014.
In May 2017 we reported the the Institute of Low Temperature and Structure Research (Wroclaw, Poland) developed a new efficient white light source that uses graphene foam excitated by a continuous-wave laser. We have seen a demonstration of the technology at IDTechEx 2019 (see video below).
We have recently spoken with Prof. Krzysztof Piech who updated us on the project's process. Prof. Piech tells us that the research team received a grant of around $130,000 to develop the technology, and are expecting to soon receive a $270,000 grant that will enable the production of a series of prototypes. We hope to update once these prototypes can be demonstrated.
In May 2017 we reported on a new project at the Institute of Low Temperature and Structure Research (Wroclaw, Poland) that developed a new efficient white light source that uses graphene foam excitated by a continuous-wave laser.
The project is still in progress, and the researchers demonstrated the technology at IDTechEx Graphene & 2D Materials Europe 2019 earlier this month, as can be seen in our video above.