Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Nanoparticles Make Silicone Rubber Clearly Stronger

27.10.2003


Silicone rubber and other rubber-like materials have a wide variety of uses, but in almost every case they must be reinforced with particles to make them stronger or less permeable to gases or liquids. University of Cincinnati (UC) chemistry professor James Mark and colleagues have devised a technique that strengthens silicone rubber with nanoscale particles, but leaves the material crystal clear.



Silicone rubber is often reinforced by tiny particles of silica (the primary component of sand and the mineral quartz). However, those silica particles can cloud the silicone rubber, which is a problem for protective masks, contact lenses and medical tubing that rely on silicone rubber’s transparency.

Mark, along with graduate student Guru Rajan, UC professor Dale Schaefer, UC associate professor Gregory Beaucage and Yeungnam University (Korea) professor Gil Sur reported on their new technique in the August 15 issue of the Journal of Polymer Science Part B: Polymer Physics.


The technique infuses silicone rubber with nanoparticles up to five times smaller than the silica particles formed by comparable methods while still providing the same level of reinforcement and maintaining the silicone rubber’s clarity.

Variations on the technique might also be used to enhance other properties of silicone rubber and similar materials, affecting such traits as impermeability to gases or liquids. This could lead to better masks or suits to protect against agents that might be used in terrorist attacks.

The team’s technique is an improvement over related methods that use a chemical reaction to create silica particles within the silicone polymers. By generating the required catalyst in place from a tin salt and by restricting the amount of water to only that absorbed from water vapor in the air, the silica particles remain smaller—only 30 nm to 50 nm across—and are evenly dispersed throughout the silicone rubber. At that size, smaller than the wavelength of ultraviolet and visible light, the silica nanoparticles are essentially invisible.

NSF Media Contact: David Hart, 703-292-7737, dhart@nsf.gov

NSF Science Experts: Andrew Lovinger, 703-292-4933, alovinge@nsf.gov
Triantafillos J. Mountziaris, 703-292-8371, tmountzi@nsf.gov

Principal Investigators: James Mark, 513-556-9292, james.mark@uc.edu
Gregory Beaucage, 513-556-3063, gregory.beaucage@uc.edu

Josh Chamot | NSF
Further information:
http://www.nsf.gov/od/lpa/news/03/tip031027.htm#third

More articles from Materials Sciences:

nachricht Let the good tubes roll
19.01.2018 | DOE/Pacific Northwest National Laboratory

nachricht Method uses DNA, nanoparticles and lithography to make optically active structures
19.01.2018 | Northwestern University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Let the good tubes roll

19.01.2018 | Materials Sciences

How cancer metastasis happens: Researchers reveal a key mechanism

19.01.2018 | Health and Medicine

Meteoritic stardust unlocks timing of supernova dust formation

19.01.2018 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>