Follow this blog:
RSS

Lab creations: A plastic that acts like a metal

By | March 8, 2010, 12:30 PM PST

Polymers make good insulators, but MIT researchers have figured out how to make polymers act like a metal.

In other words, Gang Chen, can make plastic really hot.

Chen, director of MIT’s Pappalardo Micro and Nano Engineering Laboratories, can make polyethylene, a common polymer conduct heat. Unlike metals that heat up in every direction, the fibers in this polymer line up in an orderly fashion.

Therefore, the polymer only heats up in one direction, making it more efficient than pure metal like iron. Compared to the “normal” plastic, the new material is 300 times more conductive.

The materials created in Chen’s lab could have a huge impact in the electronics world. The polymer could replace cell-phone cases, the heat exchanger fins in household appliances, computer processor chips, and solar hot water collectors.

    But first, the group will have to figure out how to manufacture the fibers before this new polymer can ever be used for real.

    Image: Illustration courtesy of Gang Chen

    Start your week smarter with our weekly e-mail newsletter. It's your cheat sheet for good ideas. Get it.

    Boonsri Dickinson

    About Boonsri Dickinson

    Boonsri Dickinson was a contributing editor for SmartPlanet from 2010 to 2012.

    Boonsri Dickinson

    Boonsri Dickinson

    Contributing Editor, Science

    Boonsri Dickinson is a freelance journalist based in San Francisco. She has written for Discover, The Huffington Post, Forbes, Nature Biotech, Technewsdaily.com, Techstartups.com and AOL. She's currently a reporter for Business Insider. She holds degrees from the University of Florida and the University of Colorado at Boulder.

    Follow her on Twitter.

    Boonsri Dickinson

    Boonsri Dickinson

    In the unlikely event that Boonsri has a professional or financial relationship with a company she writes about, it will be prominently disclosed.

    She writes for SmartPlanet and is not an employee of CBS.

    9
    Comments

    Join the conversation!

    Follow via:
    RSS
    -1 Votes
    + -
    RE: Lab creations: A plastic that acts like a metal
    I could see this process useful for producing non-corrosive or non-errosive HX tubes in nuclear plants heat exchangers (in lower temp applications, of course). One of the battles we faced as chemists is reducing corrosion by chemical addition and dealing with the transportation/deposition of metals due to errosion in high-flow systems.
    Posted by gwd3@...
    9th Mar 2010
    +1 Vote
    + -
    How efficient is that?
    >Therefore, the polymer only heats up in one direction, making it more
    >efficient than pure metal like iron. Compared to the ?normal?
    >plastic, the new material is 300 times more conductive.

    That comparison doesn't tell me much of anything interesting. Maybe if it said "5 times more conductive than iron", or "3 times more conductive than the steel used in the heat sinks for a typical computer," then we'd have some useful information. But nobody uses "normal plastic" as a heat exchanger.
    Posted by masonwheeler
    9th Mar 2010
    +1 Vote
    + -
    RE: Lab creations: A plastic that acts like a metal
    Very good great stuff could change things a bit with inexpensive heat exchange! I like it a lot. Gang Chen of MIT thank you.
    Posted by Altotus
    9th Mar 2010
    +1 Vote
    + -
    RE: Lab creations: A plastic that acts like a metal
    I dont know about others here, but I wonder if the electrical insulating properties are maintained as high resistance? If a polymer is capable of conducting the heat, but still maintain its resistance to electrical conduction- this would be huge!!! Even though the author says it is 300 times more heat conductive than other plastics this is a big step forward. If we have the ability to move heat away from a source- via passive focused conduction we could save massive amounts of energy. Imagine if you lined the outside of the heating duct work of a home and then concentrated that lost radiant energy to a cold heat sink on the inlet of a water heater. It would act as a pre heat of 50 degree water. Imagine the impact on the improvemnt of a radiator performance curve instead of using copper or aluminum. Its all good...even if it is still early....
    Posted by JlGSC123
    11th Mar 2010
    +1 Vote
    + -
    RE: Lab creations: A plastic that acts like a metal
    Agree with #2. Report has to include scientific or engineering quantities in addition to the concept.
    Posted by leroyf
    11th Mar 2010
    +1 Vote
    + -
    RE: Lab creations: A plastic that acts like a metal
    http://www.nature.com/nnano/journal/vaop/ncurrent/abs/nnano.2010.27.html

    "Bulk polymers are generally regarded as thermal insulators, and typically have thermal conductivities on the order of 0.1 W m?1 K?1 (ref. 1). However, recent work2, 3, 4 suggests that individual chains of polyethylene?the simplest and most widely used polymer?can have extremely high thermal conductivity. Practical applications of these polymers may also require that the individual chains form fibres or films. Here, we report the fabrication of high-quality ultra-drawn polyethylene nanofibres with diameters of 50?500 nm and lengths up to tens of millimetres. The thermal conductivity of the nanofibres was found to be as high as ~104 W m?1 K?1, which is larger than the conductivities of about half of the pure metals. The high thermal conductivity is attributed to the restructuring of the polymer chains by stretching, which improves the fibre quality toward an ?ideal? single crystalline fibre. Such thermally conductive polymers are potentially useful as heat spreaders and could supplement conventional metallic heat-transfer materials, which are used in applications such as solar hot-water collectors, heat exchangers and electronic packaging."
    Posted by howied1
    11th Mar 2010
    +1 Vote
    + -
    It's nice to see SOMEONE reads back issues of "Polymer"...
    ...I mean, this boldly goes where The Department of Physics, University of Leeds went back in 1977... No new discovery here really, but tremendous potential for application!
    Posted by ReadWryt (error)
    12th Mar 2010
    +1 Vote
    + -
    RE: Lab creations: A plastic that acts like a metal
    DMOZ4U is a quality free web directory , human edited Free Web Directory with quality internet resources. Submit free link, or find websites of your choice.
    Bagreviews.org provide all kinds of bag reviews , including bag price, bag rating, and other bags information.
    bagsok reviews , including pricing, rating, and other bagsok.com information.
    Acronym List: The Acronym List is a searchable database of over 8 million acronyms, abbreviations and meanings. Covers: business, international, chat, organizations, common acronyms, computers, science, technology, government, telecommunications, and military acronyms.
    Posted by bagreviews
    14th Jul 2010
    +1 Vote
    + -
    Unidirectional heating?
    Maxwell's demon finally arrives?

    Why compare it to 'regular plastic?'

    Because in handheld devices the plastic shell IS the heat sink. It's the standard.
    Posted by wizoddg
    11th Mar
    Join the conversation
    Formatting +
    BB Codes - Note: HTML is not supported in forums
    • [b] Bold [/b]
    • [i] Italic [/i]
    • [u] Underline [/u]
    • [s] Strikethrough [/s]
    • [q] "Quote" [/q]
    • [ol][*] 1. Ordered List [/ol]
    • [ul][*] · Unordered List [/ul]
    • [pre] Preformat [/pre]
    • [quote] "Blockquote" [/quote]

    Join the SmartPlanet Community and join the conversation! Signing-up is free and quick, Do it now, we want to hear your opinion.