Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Isoporous membranes of polystyrene-block-poly(ethylene oxide)

Abstract:
The formation of isoporous membranes is a sensitive process dependent on molecular, solution, and processing parameters. Writing in the Journal of Polymer Science: Polymer Physics, Volker Abetz and colleagues use a combination of block self-assembly and phase inversion to prepare asymmetric membranes with highly ordered hexagonally packed cylinders composed of polystyrene-block-poly(ethylene oxide).

Isoporous membranes of polystyrene-block-poly(ethylene oxide)

Germany | Posted on November 24th, 2012

The self-assembled nanostructured systems were a limiting factor in pharmaceutical and separation systems because of biofouling. Modifying the surface of the material with poly(ethylene oxide), they exhibit improved protein resistance, water solubility and blood compatibility. The advantages of the properties and self-assembly of polystyrene-block-poly(ethylene oxide) with the nonsolvent induced phase inversion for controlled orientation were combined to obtain the first integral-asymmetric membrane with an isoporous top layer.

"Our results provide a detailed insight in the structure formation of integral-asymmetric, isoporous membranes of polystyrene-block-poly(ethylene oxide). These were carried out via dynamic light scattering and cloud point determinations. Based on our results we successfully set parameters like non-solvent, solvent composition and evaporation time," says Abetz. "Poly(ethylene oxide) is widely known to prevent membrane biofouling. Furthermore it is proven to be biocompatible. For this reason these membranes offer a high potential for medical and biotechnological applications."

The interplay of the nonsolvent and the solvent system was evaluated and the selectivity of the solvent for individual blocks was adjusted. The structure formation is strongly influenced by the selection of the solvent system and the nonsolvent bath.

"Since this process is sensitive to a huge number of parameters, the challenge of our work was to investigate some of these parameters like evaporation time, polymer concentration and the solvent and non-solvent system. Therefore, we offer insight into the thermodynamic properties of the ternary system of the block copolymer, solvent and non-solvent system," explains Abetz.

Further research will focus on the study the structure formation of block copolymers of this type with various molecular weights and volume fractions. Furthermore the researchers plan to optimize the flux properties and to determine the fouling properties of these membranes over long periods of time.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

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 Links

Link to the original paper on Wiley Online Library:

Related News Press

News and information

A 'movie' of ultrafast rotating molecules at a hundred billion per second: A quantum wave-like nature was successfully observed in rotating nitrogen molecules July 4th, 2015

New Biosensor Produced in Iran to Detect Effective Drugs in Cancer Treatment July 4th, 2015

Clues to inner atomic life from subtle light-emission shifts: Hyperfine structure of light absorption by short-lived cadmium atom isotopes reveals characteristics of the nucleus that matter for high precision detection methods July 3rd, 2015

Pioneering Southampton scientist awarded prestigious physics medal July 3rd, 2015

Self Assembly

Groundbreaking research to help control liquids at micro and nano scales July 3rd, 2015

New conductive ink for electronic apparel June 25th, 2015

Giving atoms their marching orders: Highly homogeneous nanotube enforces single-file flow of atoms in gas diffusion. Direct comparison of single-file and Fickian diffusion possible with new system described by researchers at the University of South Carolina and University of Flor June 24th, 2015

n-tech Research Issues Report on Smart Coatings Market, Free Download Available on Firmís Website June 24th, 2015

Nanomedicine

New Biosensor Produced in Iran to Detect Effective Drugs in Cancer Treatment July 4th, 2015

Groundbreaking research to help control liquids at micro and nano scales July 3rd, 2015

Iranian Scientists Find Simple, Economic Method to Synthesize Antibacterial Nanoparticles July 2nd, 2015

Leti Announces Launch of First European Nanomedicine Characterisation Laboratory: Project Combines Expertise of 9 Partners in 8 Countries to Foster Nanomedicine Innovation and Facilitate Regulatory Approval July 1st, 2015

Discoveries

A 'movie' of ultrafast rotating molecules at a hundred billion per second: A quantum wave-like nature was successfully observed in rotating nitrogen molecules July 4th, 2015

New Biosensor Produced in Iran to Detect Effective Drugs in Cancer Treatment July 4th, 2015

Clues to inner atomic life from subtle light-emission shifts: Hyperfine structure of light absorption by short-lived cadmium atom isotopes reveals characteristics of the nucleus that matter for high precision detection methods July 3rd, 2015

Groundbreaking research to help control liquids at micro and nano scales July 3rd, 2015

Announcements

A 'movie' of ultrafast rotating molecules at a hundred billion per second: A quantum wave-like nature was successfully observed in rotating nitrogen molecules July 4th, 2015

New Biosensor Produced in Iran to Detect Effective Drugs in Cancer Treatment July 4th, 2015

Clues to inner atomic life from subtle light-emission shifts: Hyperfine structure of light absorption by short-lived cadmium atom isotopes reveals characteristics of the nucleus that matter for high precision detection methods July 3rd, 2015

Pioneering Southampton scientist awarded prestigious physics medal July 3rd, 2015

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