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Tag Archives: cnts

Progress in the Commercialization of Graphene

European Plastics News posted an article on it’s site last week,("Graphene developers seek routes out of the lab"), focusing on challenges to and progress in the commercialization of graphene, specifically its "potential as a mutlifunctional reinforcement in composites".

Among the challenges the article raises are:

1) Entangling of 3D carbon nanotubes (CNTS) bundles

2) Individual graphite sheets restacking themselves

3) Handling of such shets during transportation to processing facilities

4) Reduction of costs of production and transportation

5) A need to develop standard operating procedures for potential health hazards

While these challenges may seem daunting, the success of three companies – Vorbeck Materials of Maryland,Cabot Corporation of Massachusetts, and Thomas Swan & Co., based in the United Kingdom – are highlighted.

The article also discusses the ongoing support of  the European Commission (EC) and the UK’s government of research in graphene and how to commercialize it.:

The European Commission is planning to channel €1bn over 10 years into co-ordinated graphene research and commercialisation. The UK government has announced it wants to spend another £50m (€60.7m) to keep the UK at the forefront of graphene research, with the University of Manchester set to host a national institute of graphene research. Commercialisation of graphene by this route could arrive by late 2012.

Converted in US dollars, the EC will be spending $1.278 billion and the UK $78.153 million.…

The NanoRelease Project

The January 23, 2012 issue of Bloomberg BNA’s Daily Environment Report carried an article (Repoduced with permission from Daily Environment Report, 13 DEN A-11, 1/23/2012. Copyright -2012 by the Bureau of National Affairs, Inc (800-372-1033 http://www/bna.com) "Government, Industry, advocacy Groups Work on Carbon Nanotube Release Measures" that focused on the work of the NanoRelease Project. As noted on its website, the NanoRelease Project’s purpose is to "foster the safe development of nanomaterials by supporting development of methods to understand the release of nanomaterials used in products."

Objectives:

  • Provide focus to broad policy debates by working through scenarios under which specific engineered nanomaterials might be released from products;

  • Examine the full life cycle of products that might act to release nanomaterials;

  • Catalogue and disseminate published and unpublished data and methods (that meet minimum criteria) used to evaluate release scenarios;
  • Develop “state of the science” reports about release measurement for the specific material types chosen that describe what is known and what research gaps exist; and
  • Enable improvements, standardization, and widespread use of methods by carrying out tests using reference nanomaterial-matrix and positive controls in a “round robin” or similar approach.

The NanoRelease Project is overseen by a Steering Committee composed of "Government officials, chemical manufacturers, and representives of labor and consumer advocacy groups." Among the members of the Steering Committee is John Monica, Jr, a partner in the DC office of Porter, Wright, Morris & Arthur LLP.

As the article notes, Carbon Nanotubes (CNTs) are currently incorporated into a …

NIOSH Recommends Exposure Limit of 7 μg/m 3 for Carbon Nanotubes

This article originally appeared on the National Nanomanufacturing Network’s InterNano website. It is licensed under Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported.

In late November, the National Institute for Occupational Safety and Health (NIOSH) published a Current Intelligence Bulletin entitled "Occupational Exposure to Carbon Nanotubes and Nanofibers." The document is not an official "agency determination or policy," and was released solely by NIOSH for peer-review and comment. NIOSH’s carbon nanotube recommended exposure limit (CNT REL) is set at 7 μg/m 3 for these preliminary purposes.

The old saying that "a picture is worth a thousand words" is once again proved by the document’s cover image which is a remarkable "field emission micrograph of a multi-walled carbon nanotube…penetrating the pleura of the lung." The finely detailed image of a CNT penetrating a lung membrane should cause any reader to stop and closely consider the document’s recommendations.

The document begins by noting that while there are no scientific reports of "adverse health effects in workers producing or using carbon nanotubes…or carbon nanofibers," NIOSH is concerned because some studies have shown that the potential for worker exposure exists. Additionally, some in vivo studies have shown adverse reactions to carbon nanotubes in rodents — including pulmonary inflammation and fibrosis. Further, some in vitro and in vivo studies have led researchers to theorize that inhalation of certain carbon nanotubes in large doses may potentially cause asbestos-type exposure effects.

NIOSH explains that the scientific basis for its CNT REL is an extrapolation from subchronic in vivo toxicity studies …

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