Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Novel membrane for climate protection and medicine technology

30.10.2013
Polymer scientists in Mainz develop a membrane for separating and enriching gas. Future application in heart-lung machines and in more efficient gas filters.

A research team from the Max Planck Institute for Polymer Research (MPI-P), under the director Hans-Jürgen Butt and his project leader Doris Vollmer, have developed a novel kind of membrane with which gases such as carbon dioxide (CO2) can be concentrated in vapour and liquids as required or separated from them.

This scientific breakthrough was announced in the scientific journal "Nature Communications". The membrane’s properties are based on a strong liquid-repellent (superamphiphobic) coating not only improving gas exchange but at the same time protecting its pores from clogging. The life-saving oxygenation of blood with heart-lung machines may take place far more reliably than until now. Hans-Jürgen Butt sees potential for further application in the medical and industrial field: “Gas exchange is definitely the largest field of application. The membrane could be used in the fields of climate protection as well as in the biomedical sectors”, explains the Max Planck director.

The basics for the superamphiphobic coating result from previous research work done by the surface physicists using candle soot whose combined structure of microscopic pellets has a far better self-cleaning effect than a lotus leaf. Soot is, however, not stable but can be used as a template for resistant coatings. The Mainz researchers coated the candle soot with silicon oxide and subsequently burnt away the soot. This remaining silicon oxide layer with an average thickness of just 20 nanometers was then coated with a semi-fluorinated silane in order to achieve the water- and oil-repellent effect.

Experiments show that the nanostructural design from the Mainz laboratories not only withstand water and oils but also blood, soap solutions and amines and can be produced with little effort. Until quite recently this property was hardly conceivable; in Mainz it was given the name „superamphiphobic“ as the logical deduction from the opposite of „amphiphilic“, which describes substances which like water as well as oil.

A fine mesh of stainless steel is used as a membrane substrate onto which the superamphiphobic layer is brought. During gas exchange the nanostructured side of the membrane comes into contact with the liquid while at the same time gas is transported past the back side. The gas molecules drift in between the gaps of the highly porous network. High gas exchange is reached even with a low flow rate thereby lowering the risk of thrombosis when blood is fed with oxygen. The particular advantage: The membrane pores do not thereby clog. In tests, compared with Teflon blood did not leave any traces on the membrane even after several hours of contact – an elementary requirement for application in heart-lung machines.

With the gas exchange rates achieved from experiments encouraging industrial applications can be expected, including enrichment of CO2. With this membrane can not only enrichment but also filtration processes be carried out. For example, fine particles from the air were filtrated and fixated in limewash and water. CO2 could pass through the membrane in amine solutions, an established CO2 storage medium, which is an important step on the road to final deposition of CO2.

Universal liquid-repellent surfaces offer an exciting field of research. On the one hand, they enable a better understanding of fundamental function principles of surface coating, interaction of liquids with solids and flow characteristics of liquids. On the other hand, the phenomena superamphiphobicity is interesting, but still largely unexplored, for the application in industry and medicine or for climate protection.

About the Max Planck Institute for Polymer Research

The Max Planck Institute for Polymer Research, which was founded in 1984, ranks among the world-wide leading research centers in the field of polymer research. The focus on so-called soft materials and macro-molecular materials has resulted in the worldwide unique position of the Max Planck Institute for Polymer Research and its research focus. Fundamental research on both production and characterization of polymers as well as the physical and chemical properties analysis of polymers are conducted here by scientific collaborators from all over the world. In the beginning of 2013 a total of 551 people were working at the MPI-P. The work force was made up of 112 scientists, 173 doctoral and diploma students, 71 visiting scientists, and 195 technical, administrative and auxiliary staff.

Weitere Informationen:

http://www.nature.com/ncomms/2013/130925/ncomms3512/full/ncomms3512.html
- the Publication at Nature Communication
http://www.mpip-mainz.mpg.de/1959508/PM13-13en
- more information and pictures at the mpip homepage

Stephan Imhof | Max-Planck-Institut
Further information:
http://www.mpip-mainz.mpg.de

More articles from Life Sciences:

nachricht Closing in on advanced prostate cancer
13.12.2017 | Institute for Research in Biomedicine (IRB Barcelona)

nachricht Visualizing single molecules in whole cells with a new spin
13.12.2017 | Wyss Institute for Biologically Inspired Engineering at Harvard

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

Im Focus: Successful Mechanical Testing of Nanowires

With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong

Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

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

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

A whole-body approach to understanding chemosensory cells

13.12.2017 | Health and Medicine

Water without windows: Capturing water vapor inside an electron microscope

13.12.2017 | Physics and Astronomy

Cellular Self-Digestion Process Triggers Autoimmune Disease

13.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>