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[superg1] 19/3/2019 21:11

Head?

That has graphite platelets in it, in the throat area of the racket.

Some scientists chopped one up and examined it. I sent the scientists report to the 2D tech team many moons ago. So when the ISO is embedded, Head will have to change their advertising. Perhaps to 'graphene based' like a few others do.

[spid81] 19/3/2019 20:53

Evening HoverFlyMan,

I think you will find FGR already have a method of manufacturing boron nitride,
This can be manufactured with the Vortex Fluidic Device. FGR's / 2dfluidics main focus is there Green Graphene Oxide gGo.

I might have mentioned it previously, FGR own 50% of the technology that is currently being installed at GEIC by Flinders University.

If you would like to purchase Professor Raston research paper on the Boron nitride,
the link is provide below, the second link is the Supplementary information that contains images.


Abstract
Graphite is exfoliated into graphene by shearing vortex fluidic films of N-methyl-pyrrolidone (NMP), as a controlled process for preparing oxide free graphene, and for exfoliating the corresponding boron nitride sheets.

[benevolent] 19/3/2019 20:24

I just had a big smile until I saw the Head tennis racket lol

Well, it's getting out there :-)

[dafad] 19/3/2019 20:17

I wonder it Vrs's connection with team Sky will in a roundabout way make Ineos aware of their products

[alchemy] 19/3/2019 19:40

Good post , sponsoring thought.

[superg1] 19/3/2019 19:39

DT

About 8 I believe.

[dtaliadoros] 19/3/2019 18:12

Fuji.... How many market makers are there for VRS?

[1teepee] 19/3/2019 17:54

hTTps://investingnews.com/daily/tech-investing/nanoscience-investing/graphene-investing/investing-in-graphene-companies/

[1teepee] 19/3/2019 17:49

hTTps://investingnews.com/daily/tech-investing/nanoscience-investing/graphene-investing/investing-in-graphene-companies/

[ellissj] 19/3/2019 16:52

What caught my interest today was this knowledge transfer partnership ktp event. Unsure if vrs attended, but i ended up upon hbn in a roundabout way via hbn ceramics ! Glalth. Best ellis

'Showcasing Emerging Technologies 2019 - Metamaterials.'

Event details:
Tuesday, 19 March 2019
9:30 am – 16:00 pm

Overview

"Helping to disseminate emerging metamaterials technologies that can be commercialised or have a positive impact on society or the environment.

The Knowledge Transfer Network (KTN), in partnership with Innovate UK, is organising this UK Metamaterials Community Workshop and Technology Showcase. The purpose of the Showcase is to exhibit emerging metamaterials technologies from across the UK academic community to industry, and to explore UK opportunities in developing and exploiting metamaterials.

Attending:

11 confirmed exhibitors from across the UK showing the strength and diversity of UK innovation in metamaterials and the latest in metamaterials technology developments.The UK Metamaterials Leadership Group.The 12 winners of the Defence and Security Accelerator’s (DASA) metasurfaces for defence and security competition – projects finish end of summer 2019.80 confirmed delegates so far – Register now to secure your place (we will operate a waiting list once capacity is reached).

This inclusive event (the latest in a well-received and successful series) will bring together key stakeholders and the broader UK community in the field of metamaterials. The focus is to address how this valuable expertise can be directed to explore key growth markets, market size, potential for growth and collaboration and new market opportunities in various application areas.

The showcase is part of the KTN’s Showcasing Emerging Technologies (SET) series, and the event will build upon the successful UK Metamaterials Community event held at Brown’s, London, in January 2018. Our aim is to help disseminate emerging metamaterials technologies that can be commercialised or have a positive impact on society or the environment and to develop a structured programme of support for the UK metamaterials community...."

[festario] 19/3/2019 16:35

Loving the late reported BUYS.

[ellissj] 19/3/2019 16:23

Another paper here, boron nitride nanoplatelets. Looks useful in extreme environments, high temperatures etc. All just potential but relevant to space applications and similar where opportunities could lie for this type of tech. etc. Aimo. Best ellis

Published: 08 June 2016

'Enhancement of toughness and wear resistance in boron nitride nanoplatelet (BNNP) reinforced Si3N4 nanocomposites.'

Intro:

"Ceramics have superior hardness, strength and corrosion resistance, but are also associated with poor toughness. Here, we propose the boron nitride nanoplatelet (BNNP) as a novel toughening reinforcement component to ceramics with outstanding mechanical properties and high-temperature stability. We used a planetary ball-milling process to exfoliate BNNPs in a scalable manner and functionalizes them with polystyrene sulfonate. Non-covalently functionalized BNNPs were homogeneously dispersed with Si3N4powders using a surfactant and then consolidated by hot pressing. The fracture toughness of the BNNP/Si3N4nanocomposite increased by as much as 24.7% with 2 vol.% of BNNPs. Furthermore, BNNPs enhanced strength (9.4%) and the tribological properties (26.7%) of the ceramic matrix. Microstructural analyzes have shown that the toughening mechanisms are combinations of the pull-out, crack bridging, branching and blunting mechanisms...."

Conclusion:

"...We discovered the potential of BNNPs as a reinforcement material for ceramic matrix composites which can be utilized as a filler in high-temperature applications such as aerospace applications and brake systems due to their stability at high temperatures."

[fuji99] 19/3/2019 16:14

Very strange share price behaviour for the last few days: Drop early morning, then stays static for the rest of the day to suddenly going back to where it closed yesterday. Some kind of artificial manipulation is not ruled out. IMO they artificially drop it to attract PI's sellers. Then before close they take it back up where it started - just in case material news drops like a hammer in the morning -

[kemorkid] 19/3/2019 16:14

Is this the calm before the stormy ride
to the stratosphere??

[spike_1] 19/3/2019 15:54

axoltyl: re wandering around a factory:

What the Graphene Council actually says:

This involves an in-person inspection of graphene production facilities, analysis of random samples of graphene products and independent testing and characterization of the material by internationally recognized and qualified labs.

All sounds perfectly reasonable to me, otherwise what is to stop a 'producer' buying in a 'sample' from VRS and trying to pass it off as their own?

BTW they have already inspected VRS facilities last August.

Best wishes - Spike

[bisho4] 19/3/2019 15:18

Hoverflyman, i lol'd :)

".com.au" hilarious :)

[axotyl] 19/3/2019 15:10

Re Grabster's post - is that a rather unconvincing attempt by N.American graphene 'producers' to skirt around mooted ISO standards?

"in-person inspection of graphene production facilities" - what would that entail? Wandering around a factory in a white lab coat?

[grabster] 19/3/2019 14:45

"There are hundreds of companies claiming to produce graphene on a commercial scale yet very few actually do . . .and new companies are popping up every day. How are graphene customers supposed to choose a reliable supplier?" …

[hoverflyman] 19/3/2019 14:36

Ellis, not long before we get trolled by pests from then? :)

[ellissj] 19/3/2019 14:22

I see nasa already done work with boron nitride nanoparticles and nanotubes in this article below. They will be there at the 'graphene summit on capitol hill,' as is neill. Dyor. Best ellis

HOME TECH BRIEFS MATERIALS & MANUFACTURING MATERIALS & COATINGS ARTICLE

SEPTEMBER 1, 2018 | MATERIALS | AEROSPACE | MECHANICAL & FLUID SYSTEMS | NANOTECHNOLOGY

"High-Kinetic-Energy Penetrator Shielding and High-Wear-Resistance Materials Fabricated with Boron Nitride Nanotubes and BNNT Polymer Composites. This system shields structures from high-kinetic-energy penetrators."

Langley Research Center, Hampton, Virginia

"In recent years, anti-penetration materials have been more widely used for armor, bulletproof vests, and micrometeoroid and orbital debris protection layers for space-suits, space vehicles, and structures. Micrometeoroids develop very high kinetic energies as they travel through space, and pose a significant hazard to spacecraft and astronauts. The velocities of micrometeorites can reach 20 kilometers per second prior to impact on the lunar surface. Therefore, a new protective system utilizing new materials is needed to effectively shield the space vehicles and structures against the high-kinetic-energy penetrators as well as provide penetration-resistant spacesuits. In order to maximize the protection ability against high-kinetic-energy penetrators, the following two major material properties should be considered: high hardness for rebounding and/or gross mechanical deformation of the penetrator, and high toughness for effective energy absorption during the mechanical deformation (and heating) of the protecting materials.

In order to increase both the hardness and toughness, boron nitride nanotubes (BNNT), boron nitride nanoparticles (BNNP), carbon nanotubes (CNT), graphenes, or their combinations can be incorporated into matrices of polymer, ceramic, or metals. Fibers, yarns, and woven or nonwoven mats of BNNT are used as toughening layers to maximize energy absorption and/or high hardness layers to rebound or deform penetrators. They also can be used as reinforcing inclusions, combining with other polymer matrices to create composite layers like typical reinforcing fibers such as Kevlar, ceramics, and metals.

BNNT possess high strength-to-weight ratio, high oxidative temperature resistance (above 800 °C in air), piezoelectric properties, and radiation shielding capabilities. These mechanical and thermal properties of BNNT are believed to make it an ideal material with which to develop a novel lightweight and high-performance anti-penetrator material. These high-aspect-ratio nanomaterials can also provide unique wear properties because the material systems that incorporate these BNNT have displayed increased hardness and toughness, especially at elevated temperatures approaching 900 °C.

A multi-layered composite film was fabricated using BNNT and CNT layers infused with polyurethane (PU) resin. The elastic modulus of the pristine PU was only 60.9 MPa, but that of the multi-layered composite was 756.9 MPa, showing an increase of more than 1140%. The increased modulus of the BNNT/CNT composite promises the increase of toughness before fracture, which is another critical property for the anti-penetrator protection.

BNNT fibers or BNNT woven or non-woven mats can be used for the protection layer by infusing a polymer, ceramic, or metal into the BNNT fibers or mats. A multi-layered composite containing both increased hardness and toughness can greatly enhance the anti-penetration protection and increase the wear resistance. A top high-hardness layer consisting of BNNT, c-BNNP, or other high-hardness materials provides initial protection against penetrators by bouncing or deforming them. The combination of various toughened layers such as a Kevlar fabric (mat), BNNT-reinforced Kevlar woven or non-woven mat, and BNNT or CNT composite layer offers superior toughness enabling effective absorption of the impact energy.

This work was done by Michael W. Smith, Sharon E. Lowther, and Robert G. Bryant of Langley Research Center; Jin Ho Kang, Cheol Park, and Godfrey Sauti of the National Institute of Aerospace; and Kevin Jordan of the Thomas Jefferson National Accelerator Facility. NASA is actively seeking licensees to commercialize this technology."

[getplaning] 19/3/2019 14:00

BBC 2 tonight - Inside the Factory - Pencils "Meanwhile, Cherry Healey is at Manchester University examining the astonishing properties of graphite. She discovers that this highly conductive form of carbon is also able to withstand temperatures up to 3,000 degrees Celsius. More surprising still, if you strip a single layer of atoms from its surface, you produce an entirely new material known as graphene. Thin and virtually invisible, embedding this in our phone screens could mean that in future we could simply roll them up. "

[ellissj] 19/3/2019 12:50

From china aerospace rns..best ellis


"..Versarien 2D materials, including Hexotene, in the Chinese aerospace sector..."

"..Neill Ricketts, CEO of Versarien, commented: "We are delighted to have reached this agreement with our latest Chinese Partner.

"The aerospace sector is at the forefront of developing advanced materials to cope with demands for attributes such as lightness, high strength, conductivity, temperature resistance and corrosion resistance.  We believe that the incorporation of Versarien's graphene and other 2D materials can provide significant benefits and we look forward to collaborating with the Partner to develop new and innovative products..."

[ellissj] 19/3/2019 12:47

Hexotene mentioned in chinese aerospace collab ! 2D materials, A new science indeed. An illustration of the potential here imo. Best ellis

'White graphene makes ceramics multifunctional. Study shows 2-D layers of boron nitride could aid strength, toughness and thermal conductivity of ceramics'

'A little hBN in ceramics could give them outstanding properties, according to a Rice University scientist.'

"Rouzbeh Shahsavari, an assistant professor of civil and environmental engineering, suggested the incorporation of ultrathin hexagonal boron nitride (hBN) sheets between layers of calcium-silicates would make an interesting bilayer crystal with multifunctional properties. These could be suitable for construction and refractory materials and applications in the nuclear industry, oil and gas, aerospace and other areas that require high-performance composites.

Combining the materials would make a ceramic that's not only tough and durable but resistant to heat and radiation. By Shahsavari's calculations, calcium-silicates with inserted layers of two-dimensional hBN could be hardened enough to serve as shielding in nuclear applications like power plants.

The research appears in the American Chemical Society journal ACS Applied Materials and Interfaces.

Two-dimensional hBN is nicknamed white graphene and looks like graphene from above, with linked hexagons forming an ultrathin plane. But hBN differs from graphene as it consists of alternating boron and nitrogen, rather than carbon, atoms.

"This work shows the possibility of material reinforcement at the smallest possible dimension, the basal plane of ceramics," Shahsavari said. "This results in a bilayer crystal where hBN is an integral part of the system as opposed to conventional reinforcing fillers that are loosely connected to the host material.

"Our high-level study shows energetic stability and significant property enhancement owing to the covalent bonding, charge transfer and orbital mixing between hBN and calcium silicates," he said.

The form of ceramic the lab studied, known as tobermorite, tends to self-assemble in layers of calcium and oxygen held together by silicate chains as it dries into hardened cement. Shahsavari's molecular-scale study showed that hBN mixes well with tobermorite, slips into the spaces between the layers as the boron and oxygen atoms bind and buckles the flat hBN sheets.

This accordion-like buckling is due to the chemical affinity and charge transfer between the boron atoms and tobermorite that stabilizes the composite and gives it high strength and toughness, properties that usually trade off against each other in engineered materials, Shahsavari said. The explanation appears to be a two-phase mechanism that takes place when the hBN layers are subjected to strain or stress.

Shahsavari's models of horizontally stacked tobermorite and tobermorite-hBN showed the composite was three times stronger and about 25 percent stiffer than the plain material. Computational analysis showed why: While the silicate chains in tobermorite failed when forced to rotate along their axes, the hBN sheets relieved the stress by first unbuckling and then stiffening.

When compressed, plain tobermorite displayed a low yield strength (or elastic modulus) of about 10 gigapascals (GPa) with a yield strain (the point at which a material deforms) of 7 percent. The composite displayed yield strength of 25 GPa and strain up to 20 percent.

"A major drawback of ceramics is that they are brittle and shatter upon high stress or strain," Shahsavari said. "Our strategy overcomes this limitation, providing enhanced ductility and toughness while improving strength properties.

"As a bonus, the thermal and radiation tolerance of the system also increases, rendering multifunctional properties," he said. "These features are all important to prevent deterioration of ceramics and increase their lifetime, thereby saving energy and maintenance costs."

When the material was tested from other angles, differences between the pure tobermorite and the composite were less pronounced, but on average, hBN improved significantly the material's properties.

"Compared with one-dimensional fillers such as conventional fibers or carbon nanotubes, 2-D materials like hBN are two-sided, so they have twice the surface area per unit mass," Shahsavari said. "This is perfect for reinforcement and adhesion to the surrounding matrix."

He said other 2-D materials like molybdenum disulfide, niobium diselenide and layered double hydroxide may also be suitable for the bottom-up design of high-performance ceramics and other multifunctional composite materials."