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Researchers recover PVA from the screens to use in medicine

Around the U.S., tons of electronic devices are thrown away each year and many of the devices ultimately end up in landfills. There are a number of recycling programs around the country, but some researchers think that better uses for old electronics are available than simply recycling them.

A compound that is found inside of LCD screens could be a key component in medications according to researchers at the University of York. The specific compound is polyvinyl-alcohol (PVA), which is widely used in LCD TVs. LCD panels are typically incinerated or buried in landfills when they are no longer usable.

The group of researchers has found a way to recover the PVA from the screens and turn it into a substance that may be suitable for use in tissue scaffolds to help the body regenerate. The researchers also say that the chemical could be useful in medications and other items to deliver drugs to a specific part of the body.

Professor James Clark said, "With 2.5 billion liquid crystal displays already reaching the end of their life, and LCD televisions proving hugely popular with consumers, that is a huge amount of potential waste to manage. It is important that we find ways of recycling as many elements of LCDs as possible so we don’t simply have to resort to burying and burning them."

The new technique that the researchers developed produces a product that is called expanded PVA. Expanded PVA is created by heating the LCD material in water using a microwave oven and then washing the material in ethanol.

The reason that PVA is being looked at so closely for medications and other medicinal uses is that the chemical produces no response from the immune system of the human body.

In February of 2009, DailyTech reported that another use for technology after the end of its useful life had been found. Some tech trash can be recycled and used in a new type of asphalt that is stronger than traditional asphalt used in roadways.  



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Ironic
By captainBOB on 7/14/2009 11:36:43 AM , Rating: 5
And they said tv wasn't good for you.




RE: Ironic
By Lastfreethinker on 7/14/2009 11:48:58 AM , Rating: 1
They say a lot of things are good for you when they aren't, and they say a lot of things are bad for you when they aren't. Needless say don't take them at their word.


RE: Ironic
By phantom505 on 7/14/2009 3:38:24 PM , Rating: 3
YEAH, what has science ever done for US?


RE: Ironic
By Maxima2k2se on 7/14/2009 4:02:37 PM , Rating: 2
Damn scientists, with their beakers and periodic table of elements, damn them all.


RE: Ironic
By marvdmartian on 7/14/2009 4:31:09 PM , Rating: 2
Don't forget the pocket protectors and slide rules! Pure EVIL!!!


RE: Ironic
By sdsdv10 on 7/14/2009 5:59:04 PM , Rating: 2
LOL, thanks for making my day!


economic sense?
By menace on 7/14/2009 12:48:35 PM , Rating: 3
After reading http://en.wikipedia.org/wiki/Polyvinyl_alcohol it doesn't sound like it is something particularly costly to manufacture (I thought the usage of PVA by fishermen was intriguing). I've serious doubts that there is an economic case for recycling the stuff. It doesn't sound like it is toxic either. So it takes up a little landfill space (still much less an impact than CRTs had). Plus you still have the problem of disposing of the other 99.9% of the mass of flat panel anyway. The asphalt idea sounds better.




RE: economic sense?
By FITCamaro on 7/14/2009 1:07:24 PM , Rating: 4
God knows we need stronger asphalt. Hate that crap since it only lasts like 2-3 years.


RE: economic sense?
By phantom505 on 7/14/2009 3:41:37 PM , Rating: 2
If we didn't pay people to repave roads every other year what do you figure our unemployment rate would be?

We have to give non-essitial people jobs somehow, the internet and IT only provides so many.


RE: economic sense?
By akugami on 7/14/2009 3:43:34 PM , Rating: 2
Depends on how heavy the usage is and how well it is maintained.

For normal roads like a heavy use highway then you'll need to replace it every 2-3 years and it's probably too much trouble to resurface (seal coat) it and should be repaved. And that's mainly due to the cost of the crew involved in roadwork.

For parking lots, if you seal all the cracks and patch problem areas on a yearly basis that should solve most problems. Resurface it every 3 years it can last 10-15 years (maybe more) depending on traffic and the quality of the foundation. One of the major problems for parking lots is those darned leaking cars. Oil leaked onto asphalt kills it, though it won't harm cement. Look into a parking lot and check out the damage from leaking cars. A lot of older parking lots of pretty sizable holes from the oil eating into the asphalt.

For home driveways, a well maintained asphalt surface should last 15-25 years.


RE: economic sense?
By Bruneauinfo on 7/15/2009 9:00:43 AM , Rating: 2
use concrete!


I would say widely used
By Totally on 7/15/2009 9:20:35 AM , Rating: 2
IPS/PVA panels aren't that widely used as cheaper TN panels.

Which brings me to my question, how are the going to differentiate between the two types of lcd panels?




RE: I would say widely used
By jabber on 7/15/2009 5:44:16 PM , Rating: 2
Yeah I was intrigued as to whether TN panels etc. counted into the mix.

At least I can donate my Samsung 214T to medical science when it dies.


Thanks, but no thanks...
By SublimeSimplicity on 7/14/2009 4:39:50 PM , Rating: 2
This sounds great on the surface, but I hope they give you a choice at the hospital.

I mean if I'm badly injured in a fire and need a skin graph I'd hate to wake from my coma to find out that they used the components from a slow refresh, low contrast ratio LCD panel from the county dump to fix me up.

Sure I'd have my health, but the videophile inside me would never recover. Maybe I need to add this to my living will, just to be safe.




Recycle?
By Trisped on 7/14/2009 5:28:03 PM , Rating: 2
quote:
...but some researchers think that better uses for old electronics are available than simply recycling them.

How is it not recycling to take a component from a product being desposed of and using it in a new product to be sold to consumers?




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