Navigation Links
Rice University lab creates self-strengthening nanocomposite
Date:3/23/2011

Researchers at Rice University have created a synthetic material that gets stronger from repeated stress much like the body strengthens bones and muscles after repeated workouts.

Work by the Rice lab of Pulickel Ajayan, professor in mechanical engineering and materials science and of chemistry, shows the potential of stiffening polymer-based nanocomposites with carbon nanotube fillers. The team reported its discovery this month in the journal ACS Nano.

The trick, it seems, lies in the complex, dynamic interface between nanostructures and polymers in carefully engineered nanocomposite materials.

Brent Carey, a graduate student in Ajayan's lab, found the interesting property while testing the high-cycle fatigue properties of a composite he made by infiltrating a forest of vertically aligned, multiwalled nanotubes with polydimethylsiloxane (PDMS), an inert, rubbery polymer. To his great surprise, repeatedly loading the material didn't seem to damage it at all. In fact, the stress made it stiffer.

Carey, whose research is sponsored by a NASA fellowship, used dynamic mechanical analysis (DMA) to test their material. He found that after an astounding 3.5 million compressions (five per second) over about a week's time, the stiffness of the composite had increased by 12 percent and showed the potential for even further improvement.

"It took a bit of tweaking to get the instrument to do this," Carey said. "DMA generally assumes that your material isn't changing in any permanent way. In the early tests, the software kept telling me, 'I've damaged the sample!' as the stiffness increased. I also had to trick it with an unsolvable program loop to achieve the high number of cycles."

Materials scientists know that metals can strain-harden during repeated deformation, a result of the creation and jamming of defects -- known as dislocations -- in their crystalline lattice. Polymers, which are made of long, repeating
'/>"/>

Contact: David Ruth
druth@rice.edu
713-348-6327
Rice University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Two Hebrew University professors win prestigious Canadian medical science award
2. University of Houston wins $1 million EPA grant to test diesel technology on buses
3. Peter Mumby to receive prestigious 2011 Rosenstiel Award from the University of Miami
4. The University of Montreal Biodiversity Centre opens
5. Syracuse University research team shapes cell behavior research
6. University of Illinois partners in $9.6 million grant to bolster food security in India
7. University of Missouri researcher study provides insight into how corn makes hormones
8. Queens University scientists behind safer drinking water in US
9. University of Maryland School of Medicine study identifies genes associated with binge drinking
10. Aetna Foundation funding Boston University obesity research
11. University of Miami scientists track great hammerhead shark migration
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/23/2014)... coal for domestic heating may contribute to early fetal ... The Saban Research Institute of Children,s Hospital Los Angeles ... the world. , In a paper published today in ... report ,"alarmingly strong statistical correlations" between seasonal ambient air ... , UB has one of the highest levels of ...
(Date:4/23/2014)... of Public Health-Bloomington has bolstered the link between red ... association between heme iron, found only in meat, and ... that heme iron consumption increased the risk for coronary ... found between nonheme iron, which is in plant and ... study was published online ahead of print in the ...
(Date:4/23/2014)... diagnosed with Huntington,s disease, most in their mid-thirties ... physical, and behavioral decline within two decades. "Mutant" ... the genetic disease, have been the primary focus ... according to new research from Prof. Gerardo Lederkremer ... Department of Cell Research and Immunology, in collaboration ...
Breaking Biology News(10 mins):Pollutants from coal-burning stoves strongly associated with miscarriages in Mongolia 2Study: Iron consumption can increase risk for heart disease 2On the defensive 2On the defensive 3
... 11 Chip Supply, Inc., a global provider of ... host a visit yesterday by U.S. Senator George LeMieux ... a co-sponsor of the Export Promotion Act (bipartisan legislation ... sector), met with Chip Supply to review, firsthand, how ...
... 13, 2010Scientists are turning to a decades-old technique to ... and how it might impact their research in proteomics, ... Engineering & Biotechnology News (GEN). These studies are built ... Nobel Prize winner in Physics, Percy Bridgman, Ph.D., who ...
... using funding from the Advanced Research Projects Agency - ... two different, but related, approaches for removing carbon dioxide ... Power plants produce approximately one-third of all ... The researchers will attempt to use the unique ...
Cached Biology News:Chip Supply Hosts Visit by U.S. Senator George LeMieux 2ARPA-E funding supports research on carbon dioxide removal from flue gases 2ARPA-E funding supports research on carbon dioxide removal from flue gases 3ARPA-E funding supports research on carbon dioxide removal from flue gases 4
(Date:1/15/2014)... The Microcompetition with Foreign DNA theory explains ... these latent viruses is the Epstein Barr Virus (EBV), and ... (RA) is a chronic inflammatory disease that destroys the body’s ... RA patients have high concentrations of EBV DNA in their ...
(Date:1/15/2014)... TaiGen Biotechnology Company, Limited ("TaiGen") today announced that they ... Russian pharmaceutical company, to develop and commercialize nemonoxacin (Taigexyn ... , Turkey and other members ... antibiotic for the treatment of bacterial infections including those ...
(Date:1/14/2014)... As pet owners drew up their lists of New Year,s ... better care of my furry companion." Nowadays there are pet salons, ... cases to take the little canine or feline darlings along wherever ... buy some pricey toys at the pet store. But anyone who ...
(Date:1/14/2014)... January 14, 2014 In recent years, ... and methods in product development and promotion has led ... This mistrust, fueled by concerns about the insidious impact ... reports of spectacular fines to the world’s biggest pharmas ...
Breaking Biology Technology:Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3
... Ill., Feb. 24, 2011 Envergent Technologies LLC, a Honeywell ... will be used by Crane & Co. to convert biomass ... Crane Mass. facility where it produces paper used for U.S. ... forest residue into a clean-burning, nearly carbon-neutral liquid biofuel that ...
... DENVER, Feb. 24, 2011 (OTC Bulletin Board: OMBP): ... effective March 1, 2011, Dr. James Crapo will become ... the Company anticipates appointing Dr. Crapo as a director ... served as Omni Bio,s acting Chief Executive Officer since ...
... MYL ) today announced its financial results for the three and ... for 2011.   Financial Results ... 2010 compared to $0.33 for the same prior year quarter, an ... the year ended December 31, 2010 compared to $1.30 for the ...
Cached Biology Technology:Honeywell's Envergent Technologies to Demonstrate Renewable Fuel for Heat & Power at Crane & Company's Massachusetts Headquarters 2Honeywell's Envergent Technologies to Demonstrate Renewable Fuel for Heat & Power at Crane & Company's Massachusetts Headquarters 3Omni Bio Pharmaceutical Realigns Management 2Omni Bio Pharmaceutical Realigns Management 3Omni Bio Pharmaceutical Realigns Management 4Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 2Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 3Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 4Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 5Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 6Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 7Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 8Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 9Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 10Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 11Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 12Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 13Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 14Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 15Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 16Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 17Mylan Reports Adjusted Diluted EPS of $0.45 for the Quarter, a 36% Increase over Prior Year Quarter; and $1.61 for the Year, a 24% Increase over Prior Year 18
Thermo Forma provides an array of accessory Racks for the Cryo/CryoPlus 16" Diameter storage system. To maximise inventory capacity a Jumbo Arrowhead configuration is recommended. You may choose betw...
...
The Holten mini vertical flow workbench provides a particle-free environment for sample protection against airborne contaminants....
...
Biology Products: