Navigation Links
MIT scientists transform polyethylene into a heat-conducting material
Date:3/7/2010

CAMBRIDGE, Mass. -- Most polymers materials made of long, chain-like molecules are very good insulators for both heat and electricity. But an MIT team has found a way to transform the most widely used polymer, polyethylene, into a material that conducts heat just as well as most metals, yet remains an electrical insulator.

The new process causes the polymer to conduct heat very efficiently in just one direction, unlike metals, which conduct equally well in all directions. This may make the new material especially useful for applications where it is important to draw heat away from an object, such as a computer processor chip. The work is described in a paper published on March 7 in Nature Materials.

The key to the transformation was getting all the polymer molecules to line up the same way, rather than forming a chaotic tangled mass, as they normally do. The team did that by slowly drawing a polyethylene fiber out of a solution, using the finely controllable cantilever of an atomic force microscope, which they also used to measure the properties of the resulting fiber.

This fiber was about 300 times more thermally conductive than normal polyethylene along the direction of the individual fibers, says the team's leader, Gang Chen, the Carl Richard Soderberg Professor of Power Engineering and director of MIT's Pappalardo Micro and Nano Engineering Laboratories.

The high thermal conductivity could make such fibers useful for dissipating heat in many applications where metals are now used, such as solar hot water collectors, heat exchangers and electronics.

Chen explains that most attempts to create polymers with improved thermal conductivity have focused on adding in other materials, such as carbon nanotubes, but these have achieved only modest increases in conductivity because the interfaces between the two kinds of material tend to add thermal resistance. "The interfaces actually scatter heat, so you don't ge
'/>"/>

Contact: Jennifer Hirsch
jfhirsch@mit.edu
617-253-1682
Massachusetts Institute of Technology
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Scientists discover how ocean bacterium turns carbon into fuel
2. Scientists glimpse nanobubbles on super nonstick surfaces
3. Princeton scientists find an equation for materials innovation
4. Scientists glimpse nanobubbles on super non-stick surfaces
5. Scientists transplant nose of mosquito, advance fight against malaria
6. Penn material scientists turn light into electrical current using a golden nanoscale system
7. Seeing the quantum in chemistry: JILA scientists control chemical reactions of ultracold molecules
8. NFCR Scientists Discover Brain Tumor's “Escape Path”
9. Scientists achieve first rewire of genetic switches
10. Scientists create worlds first molecular transistor
11. 6 PNNL scientists elected AAAS fellows
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/1/2014)... ON (PRWEB) August 01, 2014 ... has led to a better understanding embryonic development. ... and reorganize into structurally and functionally distinct tissues ... physical defects. Prof. Todd McDevitt, Melissa Kinney, ... biophysical signals interact with biochemical cues to control ...
(Date:7/31/2014)... July 31, 2014 Today BioSpace , the leading life ... map campaign spotlighting the life sciences community in Illinois ... Kansas , Michigan , Minnesota ... Ohio and Wisconsin . ... percent of all job postings on BioSpace originating in this region in ...
(Date:7/31/2014)... (1912-1954), is famous for a number of breakthroughs, which ... he published a paper, which laid the foundation of ... computer algorithm. He next played a pivotal role in ... the German military codes, enabling the Allies to defeat ... late 1940,s he turned his attention to artificial intelligence ...
(Date:7/31/2014)... University Bloomington have described the self-assembly of large, ... potential value for the field of organic electronic ... , Their paper, "Anion-Induced Dimerization of 5-fold Symmetric ... Crystals," has been published online by Chemical ... of Chemistry. It is the first collaboration by ...
Breaking Biology Technology:Study Links Biomechanics and Gene Expression in Stem Cells 2Midwest Biotech Leaders Featured On BioSpace Map 2A mathematical theory proposed by Alan Turing in 1952 can explain the formation of fingers 2A mathematical theory proposed by Alan Turing in 1952 can explain the formation of fingers 3Chemists demonstrate 'bricks-and-mortar' assembly of new molecular structures 2Chemists demonstrate 'bricks-and-mortar' assembly of new molecular structures 3
... expanded access to choice, quality and cost-efficiency for patients ... Fla., June 24 Galichia Heart Hospital and Mobile ... to host MSI-coordinated, highly specialized, urologic surgical teams at ... Galichia,s capabilities as a center of excellence for selected ...
... 24 /PRNewswire-FirstCall/ - AEterna Zentaris Inc. (NASDAQ: ... company focused on endocrine therapy and oncology, announced ... registered direct offering of US$10 million of units ... warrants to certain institutional investors. AEterna Zentaris received ...
... and diagnostics, including new technologies, enhanced biotech and drug developments, ... the center of Cleveland Clinic,s 7th Annual Medical Innovation Summit, ... more than 900 leaders from throughout the healthcare industry to ... and gain actionable insights. , , This year,s ...
Cached Biology Technology:Galichia Heart Hospital Partners with Mobile Surgery International to Develop Wichita-based Center of Excellence with Global Convenience(TM) 2Galichia Heart Hospital Partners with Mobile Surgery International to Develop Wichita-based Center of Excellence with Global Convenience(TM) 3AEterna Zentaris Receives US$10 Million from Institutional Investors 2AEterna Zentaris Receives US$10 Million from Institutional Investors 32009 Medical Innovation Summit at Cleveland Clinic to Highlight the Latest Developments in Cancer Care 22009 Medical Innovation Summit at Cleveland Clinic to Highlight the Latest Developments in Cancer Care 3
(Date:8/1/2014)... Service Provider Binary Biometrics is pleased to welcome Kevin Morris ... improve its mobile service capabilities and add more daily appointments, which will allow ... several new cities such as, but not limited to, Daytona Beach ... Deltona , Edgewater , Holly Hill ... , Oak Hill , Orange City ...
(Date:7/31/2014)... In the United States, natural-gas production from shale ... since 2007. Yet scientists still do not fully ... according to a report in the journal ... As gas extraction continues to vastly outpace scientific ... various organizations and institutions, including Princeton University, concluded ...
(Date:7/31/2014)... bigeye tuna movements in the northwestern Atlantic Ocean led ... Center at the University of Massachusetts Amherst, found among ... range with pronounced north-south movements from Georges Bank to ... off Cape Hatteras southwest of Bermuda for foraging. , ... study one of the most important commercial tuna species ...
Breaking Biology News(10 mins):Binary Biometrics, Founded by James Timothy White, Expands Services to 13+ Locations With the Addition of Owner/Operator Kevin Morris 2Binary Biometrics, Founded by James Timothy White, Expands Services to 13+ Locations With the Addition of Owner/Operator Kevin Morris 3'Fracking' in the dark: Biological fallout of shale-gas production still largely unknown 2'Fracking' in the dark: Biological fallout of shale-gas production still largely unknown 3Study of bigeye tuna in Northwest Atlantic uses new tracking methods 2Study of bigeye tuna in Northwest Atlantic uses new tracking methods 3
... the genome ?those that don't code for proteins ... regulate gene activity. Among those elements are microRNAs, ... expression. , Increasing evidence indicates a role for ... from Children's Hospital Boston now demonstrate that one ...
... rainforest puts on its biggest growth spurt during the dry ... , "Most of the vegetation around the world follows a ... the rainy season and then during the dry season, leaves ... support plant growth," said lead researcher Alfredo R. Huete of ...
... the use of letrozole, an easy-to-use and inexpensive ... be unfounded, according to a major study co‚Äďauthored ... Reproductive Endocrinology and Infertility, McGill University Health Centre ... the Jewish General Hospital, and Professor of Obstetrics ...
Cached Biology News:Tiny RNA molecules fine-tune the brain's synapses 2Amazon rainforest greens up in the dry season 2Amazon rainforest greens up in the dry season 3Fertility drugs given 'all-clear' in new study 2
... design in ice/water bath This CLS ... created to easily match Cornings product ... please order under the old Sigma-Aldrich ... for assistance. ID clarifier: rack and ...
... The Yeast Oligo Microarray Kit (V2), ... to simultaneously characterize expression of many ... gene activity during important biological processes. ... representing 6,256 known ORFs from the ...
... Oligo Microarray Kit (V2), 22K is useful for ... response. Each microarray contains content derived from the ... Genomic Research (TIGR) and represents 21,500 genes. ... 1 x 3? glass slides each containing an ...
... LCMSsolution software offers an intuitive, ... instrument control, diverse data handling, ... requirements. Comprehensive functions include data ... data management in both standalone ...
Biology Products: