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Published on: August 16, 2016
Translocation across a self-healing block copolymer membrane
Sabrina Nehache1, Prashant Tyagi, Mona Semsarilar
1Institut Européen des Membranes, IEM, UMR-5635, Université de Montpellier, ENSCM, CNRS, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France. damien.quemener@umontpellier.fr.
This study shows a self-healing membrane made from block copolymer micelles can transport nano-objects in water. Water flow creates temporary pores for nano-object passage, demonstrating size-selective translocation.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Chemistry
Background:
- Self-assembled block copolymer micelles offer unique structural properties.
- Membrane technology is crucial for separation and transport processes.
- Understanding nano-object translocation is key for filtration and delivery systems.
Purpose of the Study:
- To investigate the translocation of nano-objects through a membrane formed by self-assembled block copolymer micelles.
- To explore the role of water flow and self-healing properties in the membrane's function.
- To determine the influence of nanoparticle characteristics and applied pressure on translocation selectivity.
Main Methods:
- Preparation of a membrane using self-assembly of poly(styrene-co-acrylonitrile)-b-poly(ethylene oxide)-b-poly(styrene-co-acrylonitrile) micelles.
- Utilizing water flow as a driving force for nano-object translocation.
- Characterization of nano-object passage through the membrane under varying pressures.
- Analysis of the self-healing mechanism of the temporary pores.
Main Results:
- The membrane facilitated the translocation of nano-objects in aqueous solution.
- Temporary pores formed between micelles due to water flow, enabling nano-object passage.
- These pores exhibited a self-healing mechanism after nano-object translocation.
- Polystyrene and silica nanoparticles showed selective translocation influenced by their size and applied pressure.
Conclusions:
- Self-assembled block copolymer micelle membranes can achieve selective nano-object translocation.
- The dynamic pore formation and self-healing properties are critical for membrane function.
- This membrane system shows potential for applications in nanofiltration and controlled transport.
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