Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Bayer MaterialScience and partners develop polyurethane nanofoams for thermal insulation

polyurethane nanofoams
polyurethane nanofoams

Abstract:
Double the insulating performance, reduced energy consumption

Bayer MaterialScience and partners develop polyurethane nanofoams for thermal insulation

Leverkusen | Posted on October 15th, 2010

Bayer MaterialScience is working on the development of polyurethane nanofoams that could lead to a quantum leap in thermal insulation performance several years down the road. The company is focusing its efforts on microemulsions, which react under supercritical conditions (Principle of Supercritical Microemulsion Expansion, POSME) to form polyurethane rigid foams. The aim is to produce rigid foams with pore sizes of less than 150 nanometers in diameter.

"Nanofoams of this kind achieve twice the thermal insulation performance of today's polyurethane foams, meaning that they could, for example, significantly reduce the energy consumption of refrigeration appliances and, in turn, make a major contribution to reducing CO2 emissions. Furthermore, the walls of these appliances could be of thinner design, resulting in more storage space for refrigerated goods," explained Dr. Stefan Lindner, a polyurethane rigid foam specialist at Bayer MaterialScience.

The company is partnering on this research project with Prof. Reinhard Strey from the University of Cologne's Institute of Physical Chemistry, who has applied for a patent on the POSME process. As part of the collaboration, his working group is engaged in optimizing the characteristics of the microemulsions.

The thermal insulation performance of a polyurethane rigid foam depends chiefly on the size of the foam pores. The smaller the diameter, the lower the thermal conductivity and the better the insulating effect. Today's polyurethane rigid foams typically have pore sizes of roughly 150 micrometers, which exceeds the pore size of nanofoams planned for the future by a factor of approximately 1,000.

To synthesize a nanofoam using the POSME method, carbon dioxide (CO2) and the liquid polyurethane raw materials (polyol and isocyanate) are mixed with the help of special surfactants at a pressure of 200 bar to form a microemulsion consisting of nanometer-sized droplets filled with CO2 and encapsulated in surfactants. The pressure is then reduced, causing the CO2 to expand and the droplets to become bubbles still in the nanometer range. At the same time, the polyurethane raw materials react to form a 3D polymer network that is a rigid polyurethane foam.

"One of the trickiest challenges we face is to optimally coordinate the reaction of the polyurethane raw materials with the expansion of the CO2 bubbles by carefully fine-tuning the processing parameters so that nanopores of the targeted diameter result," explained Mr. Lindner. "It's no easy task," added Dr. Wolfgang Friederichs, head of Global Product Research at Bayer MaterialScience. "It is likely to take several more years before these challenges are overcome."

####

About Bayer MaterialScience
With 2009 sales of EUR 7.5 billion, Bayer MaterialScience is among the world’s largest polymer companies. Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative solutions for products used in many areas of daily life. The main segments served are the automotive, electrical and electronics, construction and the sports and leisure industries. At the end of 2009, Bayer MaterialScience had 30 production sites and employed approximately 14,300 people around the globe. Bayer MaterialScience is a Bayer Group company.

For more information, please click here

Copyright © Bayer MaterialScience

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Silk could improve sensitivity, flexibility of wearable body sensors August 20th, 2017

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Possible Futures

Silk could improve sensitivity, flexibility of wearable body sensors August 20th, 2017

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Announcements

Silk could improve sensitivity, flexibility of wearable body sensors August 20th, 2017

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Gold nanostars and immunotherapy vaccinate mice against cancer: New treatment cures, vaccinates mouse in small proof-of-concept study August 18th, 2017

Researchers printed graphene-like materials with inkjet August 17th, 2017

Food/Agriculture/Supplements

Probiotics: Novel biosynthetic tool to develop metallic nanoparticles: This research article by Dr. Nida Akhtar et al has been published in Recent Patents on Drug Delivery & Formulation, Volume 11, Issue 1, 2017 July 20th, 2017

New technology could offer cheaper, faster food testing: Specialized droplets interact with bacteria and can be analyzed using a smartphone April 7th, 2017

Meta-lenses bring benchtop performance to small, hand-held spectrometer: Game-changing nanostructure-based lenses allow smaller devices, increased functionality February 9th, 2017

PCATDES Starts Field Testing of Photocatalytic Reactors in South East Asia December 28th, 2016

Energy

The power of perovskite: OIST researchers improve perovskite-based technology in the entire energy cycle, from solar cells harnessing power to LED diodes to light the screens of future electronic devices and other lighting applications August 18th, 2017

Freeze-dried foam soaks up carbon dioxide: Rice University scientists lead effort to make novel 3-D material August 16th, 2017

Two Scientists Receive Grants to Develop New Materials: Chad Mirkin and Monica Olvera de la Cruz recognized by Sherman Fairchild Foundation August 16th, 2017

Fewer defects from a 2-D approach August 15th, 2017

Home

Rice lab expands palette for color-changing glass: Nanophotonics team creates low-voltage, multicolor, electrochromic glass March 8th, 2017

Chemists Cook up New Nanomaterial and Imaging Method: Nanomaterials can store all kinds of things, including energy, drugs and other cargo January 19th, 2017

Industrial Nanotech, Inc. Announces Plans to Spin Off New Product Line to Major Paint Compan November 9th, 2016

New flexible material can make any window 'smart' August 23rd, 2016

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project