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[luckyorange] 25/2/2017 21:09

Just one more, claims re a super battery and how they get investment from China with a big load of b/s lol,

Andrea Ferrari comments on the claims as well as others

[luckyorange] 25/2/2017 20:54

All of the nerdy stuff ;-0



It's the cats whisker !

[luckyorange] 25/2/2017 20:31

New Graphene-based Ink Method Aids Production of Conductive Textile

A new method for producing conductive cotton fabrics using graphene-based inks opens up new possibilities for flexible and wearable electronics, without the use of expensive and toxic processing steps.

Wearable, textiles-based electronics present new possibilities for flexible circuits, healthcare and environment monitoring, energy conversion, and many others. Now, researchers at the Cambridge Graphene Centre (CGC) at the University of Cambridge, working in collaboration with scientists at Jiangnan University, China, have devised a method for depositing graphene-based inks onto cotton to produce a conductive textile. The work, published in the journal Carbon, demonstrates a wearable motion sensor based on the conductive cotton.

Cotton fabric is among the most widespread for use in clothing and textiles, as it is breathable and comfortable to wear, as well as being durable to washing. These properties also make it an excellent choice for textile electronics. A new process, developed by Dr. Felice Torrisi at the CGC, and his collaborators, is a low-cost, sustainable and environmentally-friendly method for making conductive cotton textiles by impregnating them with a graphene-based conductive ink.

Based on Dr. Torrisi’s work on the formulation of printable graphene inks for flexible electronics, the team created inks of chemically modified graphene flakes that are more adhesive to cotton fibers than unmodified graphene. Heat treatment after depositing the ink on the fabric improves the conductivity of the modified graphene. The adhesion of the modified graphene to the cotton fiber is similar to the way cotton holds colored dyes, and allows the fabric to remain conductive after several washes.

Although numerous researchers around the world have developed wearable sensors, most of the current wearable technologies rely on rigid electronic components mounted on flexible materials such as plastic films or textiles. These offer limited compatibility with the skin in many circumstances, are damaged when washed and are uncomfortable to wear because they are not breathable.

“Other conductive inks are made from precious metals such as silver, which makes them very expensive to produce and not sustainable, whereas graphene is both cheap, environmentally-friendly, and chemically compatible with cotton,” explains Dr. Torrisi.

[serratia] 25/2/2017 20:08

Pulling things together -

The machine used to shear the graphite is made by Microfluidics. I haven't tied everything together yet after multiple re reads. They've run their machine at different graphite concentrations for different number of passes and the machine has different flow rates for different pressures. The paper quotes a larger machine flow rate than any advertised in their literature So I'll skip to their conclusions.
Sorry about an earlier mistake - they can run at 100g/l graphite in the fluidiser. They run 70 cycles through the machine to get the finished product. Using the machine size they say is available it would produce around 1 kg of Graphene/hr. At the top end IF they could run it for 24 hr days,7 days/week they could make up to 9 tons of Graphene/year. That equates to 90k lit ink/year.

[luckyorange] 25/2/2017 20:00

"I can see trying to extending the range of electric cars, would certainly help speed up development,
it would be nice to see them extend the battery life on cordless power tools, would make my life a little easier.
Presently I'm working on a construction project that will double the size of a water treatment plant, A couple of the guys that work there said that this product would be used in the water filtration and the desalination process and would replace more then half of the equipment in use today, one of the guys said that it's the speed in which Graphene can do the job, that is the most impressive part, hours instead of days "

Just something interesting picked up whilst having a quick look around the net.

Bit of a blog here, (The GRAPHENE mega thread - because it's technology you need to know about!)

Nice to see someone blogging in 2016, fairly easy to read if you are interested.

[serratia] 25/2/2017 17:58

Let's play with these figures -

The passive RFID market is around $3.85 Bn, if each tag costs 10c that's 38.5 Bn tags.
IF you can print 500k tags/ litre that's 77000 lits of ink. As I read the scientific paper the ink contains 100g/l Graphene so that equates to 7700 kgs Graphene if all RFID's are made that way.

hxxp://www.idtechex.com/research/reports/rfid-forecasts-players-and-opportunities-2016-2026-000451.asp

Edit - Switched from 10 to 100g/l.

[serratia] 25/2/2017 17:26

Next point the number of RFID's that can be printed from a litre of ink -


The production cost of a printed tag is mainly due to the
amount of conductive ink used. For a chipless tag based on C-
like resonators [15], the effective area of the metallic
conductors is equal to 1 cm ². With an anilox roll of
20 cm3/m², we can cover a surface of 50 m² with 1 liter of ink,
which is equivalent to 500,000 tags.


hxxps://www.researchgate.net/publication/256615002_Design_of_Chipless_RFID_Tags_Printed_on_Paper_by_Flexography

I think that's using a new approach as that is 3c/tag ($1500/500000)

[luckyorange] 25/2/2017 16:57

I wonder how many variables the weight change gives, many I would think



Maximum weight is increased from 702kg to 722kg plus tyres.

[serratia] 25/2/2017 16:46

A few more points - Silver inks cost $1500/litre.

RFID's cost 10 cents each. I assume they're silver based.

hxxp://itak.iaitam.org/simple-cost-analysis-for-rfid-options-choice-must-fit-the-organizations-needs-and-budget/

There are other developments non Graphene which may reduce the cost considerably.

[serratia] 25/2/2017 15:55

An interesting note in the paper quoted in the Cambridge inks link. The graphite used cost $1/kg,the yield of ink suitable Graphene material was 100%.

[superg1] 25/2/2017 11:00

Mclaren Boullier

He was the guy that said they were going to use graphene for strength and heat dissipation.

The only teaser he chucks in during the launch is that they have included some clever solutions and he says he is not going to say what they are.

That could be anything of course but if they have used graphene it seems they are unlikely to say anything about it. If they have used it it must be for a gain or benefit and they are not in the game of advertising such benefits for the for competitors to use.

I have no doubt (I am strictly forbidden to expand on this) that Mclaren are not alone in their quest.

[cyberbub] 25/2/2017 10:19

The article about inks looks great technically. But 100g of graphene per litre?? Surely that will be very expensive, at least at current graphene prices?

[shavian] 25/2/2017 08:31

No harm in reapeating it, HG. It brilliantly shows why Cambridge Graphene was such a transformational bargain for VRS. It links us to everything that's going on with graphene in the EU, via the Graphene Flagship, as well as bringing access to this disruptive IP in inks and screen printing of electronic circuits, and 3D printing.

Imagine being a field engineer on site at some mine or on an oil rig in the back of beyond. You need a new widget to fix a broken machine. It gets re-designed at head office, emailed to you on site. You set up your 3D printer and build the part out of Nanene-enhanced PEEK in a couple of hours. Problem solved, millions of ££ saved. Simples.

[handygandhi] 25/2/2017 08:07

I don't know whether, or not, this article has been posted on here, but it makes for interesting VRS related reading.

[superg1] 24/2/2017 18:50

I'm guessing Mclaren didn't mention graphene but that doesn't mean it isn't being used just that they didn't say it. Boullier was very clear in what he said

I know for sure relevant others are playing with it but can't expand on that. With the others playing I know for sure I am not going to find it on the web.

[superg1] 24/2/2017 18:20

Bad day to fix fences missed the launch. No internet 3 or 4G where I was either... doh.

I had a much better offer (VRS 'research') for what I was committed to (24 hr charity exercise jobby), I tried to change my slot but ended up having to cover and do 2 hours instead (legs aching).

That would have given me some bits to add but charity comes first.

Now the darts team as ever are short so my usual call up has kicked in for tonight. Nothing to do with always having to do the driving of course.

So hopefully I can catch up with anything that may or may not have been going on tomorrow.

On any supply as before I think I know what it is and expect another 600k plus late trade which should be what has been pushed through in the last few days. That supply to the MM should appear next week and then if I'm right that trade is done. As the first odd number ending 7222 took the position to ending with 0000 then there is more than a fair chance it's that supply.

As I've been off air all day I haven't the slightest idea which MM was on the offer or if they moved around.

Again if I'm right on the supply as it's the last bit I'm guessing they are pushing it through.

The one I'm on about has never been a notifiable holding.

[anley] 24/2/2017 15:47

On offer at 17.10p.................closing a covered bear position.

[tini5] 24/2/2017 15:13

Temp retracement for some profit taking. Can't blame them, I first bought at 8p and now averaged up to 15.

Picture here is all good. Shake out some shares and move on up next week.

[bones] 24/2/2017 15:08

Decided to add a slice more as 17.2p is available.

[cyberbub] 24/2/2017 15:07

Surprised the share price has fallen back so far. I suppose the RSI has been showing overbought for a while, so short-termers may have bailed. It's low volume anyway, and no bad news, so I am staying put for the ride....

[luckyorange] 24/2/2017 14:04

Re. Lansdowne, I didn't see it in their product list, so would they be promoting it verbally via the sales team?