Health Concerns involving Carbon Nanotube Technology
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Health Concerns involving Carbon Nanotube Technology
A buddy of mind was mentioning some possible health concerns regarding the technology. I was wondering if anyone else had read anything, or considered the risks. CF is known to be toxic, but to what extent I'm not sure. Now that CN is on the market, I'm interested in what risks it poses.
Here's one of many articles
https://query.nytimes.com/gst/fullpag...50C0A9629C8B63
From what I was told, the scary prospect CN technology poses is that the particles are small enough to pass through the blood/brain barrier. Where as normal particles, the kinds we encounter in nature are large enough that the mesh (or whatever the barrier consists of) are large enough, that they are repelled.
Also considering that Easton is probably manufactured in Taiwan or China, I'm conserned about the manufacturing conditions in the factories. Are the employees wearing resporators? Have enough studies been conducted to show if there are real risks with CN tech? Probably not.
Here's one of many articles
https://query.nytimes.com/gst/fullpag...50C0A9629C8B63
But yesterday's report is the latest of several that raise questions about the potential health and environmental effects of synthetic nanoscale materials. Other researchers, including Dr. Oberdörster's father, Günter Oberdörster, a professor of environmental medicine at the University of Rochester, have shown that such particles can enter the brain. The fish studies, however, were the first to indicate destruction of lipid cells, the most common form of brain tissue.
Also considering that Easton is probably manufactured in Taiwan or China, I'm conserned about the manufacturing conditions in the factories. Are the employees wearing resporators? Have enough studies been conducted to show if there are real risks with CN tech? Probably not.
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Time to quick get a BMC frame and EC 90 SLK cnt fork and bars before they get pulled.....please.
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They claim to use Carbon Nanotube Technology on forks and handlebars. As I understand it, they're using nanotubes to reinforce the voids in carbon fiber. They, like everyone else, can't mass produce long strands of nanotubes yet.
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Alright so they are mixing the nanotubes with the resin so the only people who would be exposed are the people making the nanotubes and thos mixing the resin. The people doing any sanding should be wearing respirators any way since carbon fiber dust is realy bad for you.
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The term "synthetic nanoscale materials" covers a wide range of possibilities. I don't think the professor had the simple carbon nanotubes used in bike components in mind. These are no more likely to be a problem that what is currently used for carbon components. In fact, they probably don't really offer any advantages over standard components at the current level of development.
Yes, a lot of these companies probably move their manufacturing to China, Mexico etc. so that the workers and environment can be more effectively exploited. That is a problem that goes way beyond nanotube technology....
Yes, a lot of these companies probably move their manufacturing to China, Mexico etc. so that the workers and environment can be more effectively exploited. That is a problem that goes way beyond nanotube technology....
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Nanotubes are not in use at commercial scale.
Easton advertises "nanotechnology" which is some meaningless marketing term.
CF has been used in auto racing since 1982 - 24 years later, no catastrophies.
Easton advertises "nanotechnology" which is some meaningless marketing term.
CF has been used in auto racing since 1982 - 24 years later, no catastrophies.
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I was at a nano symposium a few months ago. Most of the research being presented on the health/enviromental side had to deal with non-functional group buckyballs. Even then the studies were done envitro, however they did find that the said buckyballs were pretty toxic to the lipid layer. SWNT's, single walled nano tubes are pretty harmless.
The biggest problem with nano particles is keeping them from clumping togther. In all honesty I don't think we have to much to worry about. In the US we are still under the assumption that coal is a reasonible source of electricty comapred to nuclear power.
The biggest problem with nano particles is keeping them from clumping togther. In all honesty I don't think we have to much to worry about. In the US we are still under the assumption that coal is a reasonible source of electricty comapred to nuclear power.
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Originally Posted by turbominnow
I was at a nano symposium a few months ago. Most of the research being presented on the health/enviromental side had to deal with non-functional group buckyballs. Even then the studies were done envitro, however they did find that the said buckyballs were pretty toxic to the lipid layer. SWNT's, single walled nano tubes are pretty harmless.
The biggest problem with nano particles is keeping them from clumping togther. In all honesty I don't think we have to much to worry about. In the US we are still under the assumption that coal is a reasonible source of electricty comapred to nuclear power.
The biggest problem with nano particles is keeping them from clumping togther. In all honesty I don't think we have to much to worry about. In the US we are still under the assumption that coal is a reasonible source of electricty comapred to nuclear power.
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Originally Posted by turbominnow
I was at a nano symposium a few months ago. Most of the research being presented on the health/enviromental side had to deal with non-functional group buckyballs. Even then the studies were done envitro, however they did find that the said buckyballs were pretty toxic to the lipid layer. SWNT's, single walled nano tubes are pretty harmless.
The biggest problem with nano particles is keeping them from clumping togther. In all honesty I don't think we have to much to worry about. In the US we are still under the assumption that coal is a reasonible source of electricty comapred to nuclear power.
The biggest problem with nano particles is keeping them from clumping togther. In all honesty I don't think we have to much to worry about. In the US we are still under the assumption that coal is a reasonible source of electricty comapred to nuclear power.
You will get 1000X more carbon toxicity from downtown traffic, or the current republican emission policies.
Don't smoke your forks kids.
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Crap.. and here I am Dremeling the top of my carbon steerer off over the bathroom sink. There's no warning label on the fork to not do that ya know
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Originally Posted by MrDepictor
Crap.. and here I am Dremeling the top of my carbon steerer off over the bathroom sink. There's no warning label on the fork to not do that ya know
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Nanotubes are not in use at commercial scale.
Easton advertises "nanotechnology" which is some meaningless marketing term.
CF has been used in auto racing since 1982 - 24 years later, no catastrophies.
Easton advertises "nanotechnology" which is some meaningless marketing term.
CF has been used in auto racing since 1982 - 24 years later, no catastrophies.
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Carbon nanotubes! Run away! Run away!
Actually nanotubes are quite large, tens of microns long. And they clump up really badly. They have been used to strengthen some creamics, but are a bit fragile.
Worry instead about small micron sized particulates from engines and powerplants that get lodged in your lungs.
Actually nanotubes are quite large, tens of microns long. And they clump up really badly. They have been used to strengthen some creamics, but are a bit fragile.
Worry instead about small micron sized particulates from engines and powerplants that get lodged in your lungs.
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It's nice that you consider the health risks to the employees of American companies in other countries. I can't speak for Taiwan, but in China American companies abide by the same manufacturing standards and OSHA regs as their home base state. They are obligated to, as if they didn't and they were found to be negligent, it owuld be business gloom and doom for them. The days of Dow Chem polluting the Earth are basically going away, fortunately. (But Chinese companies in China are still bastards! 2008 "Green" Olympics? I don't think so!)
It's a good supposition, and there may be plenty of scientific info on the web about it. Look for it.
It's a good supposition, and there may be plenty of scientific info on the web about it. Look for it.
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Originally Posted by sunday driver
Didn't they say the same thing about asbestos in the 50's and catalytic convertors in the 70's?
One worry about carbon nanotubes is that tiny airborne fragments will also be spiculated and capable of lodging in the lung and doing permanent damage. Airborne diesel particulate pollution is nasty, but at least those particles are smoother, so a greater proportion of the inhaled load can be coughed out.
Carbon fibre is not nanotubes. Here is a link to an article suggesting inhaled carbon fibre particles are much less toxic than quartz or chrysotile (asbestos) dust, and much more like fairly harmless titanium dust. So fork dremelers like MrDepictor can relax a bit.
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Originally Posted by DocRay
You will get 1000X more carbon toxicity from downtown traffic
Simple fix found for toxicity of fullerene clusters in water
Much attention has been paid recently to the toxic effects of nanomaterials, especially a water-soluble form of the molecule known alternately as C60, buckminsterfullerene or, simply, buckyball. These hollow, soccer-ball shaped molecules can cluster together into nanoscale crystals—dubbed “nano-C60”—that become active in watery environments. Soluble nano-C60 clusters have been shown in the lab to be cytotoxic, that is, to kill cells in culture and have been linked by a CBEN collaborator to brain damage in large-mouth bass. Researchers Vicki Colvin, Jennifer West, and Joe Hughes at Rice University’s Center for Biological and Environmental Nanotechnology have discovered a simple way to turn the toxicity off, like sliding a dimmer switch on a lamp, by attaching small molecular fragments to the surface of the hollow cages in a process known as functionalization. Figure 6.1 shows the differential cytotoxicity of a series of nano-C60 clusters where the C60 molecules have been functionalized to varying degrees. Non-functionalized fullerenes, the form used in the fish study, are toxic to half of the cells in culture at a concentration of 20 parts per billion (ppb). This is more toxic than many other organic molecules including paraquat, which is used as a pesticide. However, by attaching an increasing number of small molecular fragments to the surface of the cages, the cytotoxicity can be made to decrease steadily until, for a fully functionalized fullerene, it was not possible to add enough nano-C60 to kill half the cells. This important study demonstrates that the risks of nanomaterials are highly dependent on the specific form of the material, and that simple strategies can be found to minimize these risks.
Much attention has been paid recently to the toxic effects of nanomaterials, especially a water-soluble form of the molecule known alternately as C60, buckminsterfullerene or, simply, buckyball. These hollow, soccer-ball shaped molecules can cluster together into nanoscale crystals—dubbed “nano-C60”—that become active in watery environments. Soluble nano-C60 clusters have been shown in the lab to be cytotoxic, that is, to kill cells in culture and have been linked by a CBEN collaborator to brain damage in large-mouth bass. Researchers Vicki Colvin, Jennifer West, and Joe Hughes at Rice University’s Center for Biological and Environmental Nanotechnology have discovered a simple way to turn the toxicity off, like sliding a dimmer switch on a lamp, by attaching small molecular fragments to the surface of the hollow cages in a process known as functionalization. Figure 6.1 shows the differential cytotoxicity of a series of nano-C60 clusters where the C60 molecules have been functionalized to varying degrees. Non-functionalized fullerenes, the form used in the fish study, are toxic to half of the cells in culture at a concentration of 20 parts per billion (ppb). This is more toxic than many other organic molecules including paraquat, which is used as a pesticide. However, by attaching an increasing number of small molecular fragments to the surface of the cages, the cytotoxicity can be made to decrease steadily until, for a fully functionalized fullerene, it was not possible to add enough nano-C60 to kill half the cells. This important study demonstrates that the risks of nanomaterials are highly dependent on the specific form of the material, and that simple strategies can be found to minimize these risks.
Link for functionalization here: https://cohesion.rice.edu/centersandi...fm?doc_id=5101
or the current republican emission policies.
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You mean empirical data, but that's not what you want, you want the statistical data with measures. Check out asthma and lung disease rates since GW dropped most industrial emission standards, especially in Texas.
Fullerenes are not nanotubes.
for those with steel frames:
https://www.vitamins-nutrition.org/vi...-overdose.html
and someone should really start a thread about the danger of water in waterbottles. Water can drown. I read it on the internet.
Fullerenes are not nanotubes.
for those with steel frames:
https://www.vitamins-nutrition.org/vi...-overdose.html
and someone should really start a thread about the danger of water in waterbottles. Water can drown. I read it on the internet.
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Originally Posted by DocRay
Fullerenes are not nanotubes.
Check out asthma and lung disease rates since GW dropped most industrial emission standards, especially in Texas.
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