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Related Concept Videos

Dialysis01:15

Dialysis

Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...

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Related Experiment Video

Updated: May 11, 2026

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
07:32

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Ultrafiltration membranes with a thin poly(styrene)-b-poly(isoprene) selective layer.

Sarah E Querelle1, Elizabeth A Jackson, Edward L Cussler

  • 1Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, United States.

ACS Applied Materials & Interfaces
|May 22, 2013
PubMed
Summary
This summary is machine-generated.

New ultrafiltration membranes utilize a block polymer selective layer with cylindrical nanopores. These membranes offer high hydraulic flux and effective size discrimination of poly(ethylene oxide) solutes without chemical cross-linking.

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Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes
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Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

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Last Updated: May 11, 2026

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
07:32

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing
10:19

Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing

Published on: February 13, 2016

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes
09:09

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Published on: December 15, 2015

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Block copolymers offer tunable nanostructures for membrane applications.
  • Developing robust, thin-film composite membranes is crucial for efficient separation processes.

Purpose of the Study:

  • To fabricate ultrafiltration membranes with precisely controlled nanopore structures.
  • To evaluate the performance of these membranes in terms of hydraulic flux and solute rejection.

Main Methods:

  • Preparation of a poly(styrene)-b-poly(isoprene)-b-poly(lactide) (PS-PI-PLA) triblock copolymer film.
  • Selective removal of poly(lactide) (PLA) to create cylindrical nanopores within a poly(isoprene) (PI) matrix, supported on a microporous substrate.
  • Characterization of membrane structure, hydraulic flux, and size-discrimination capabilities using poly(ethylene oxide) (PEO) solutes.

Main Results:

  • Fabrication of ultrafiltration membranes with an 80 nm thick selective layer featuring 20 nm cylindrical pores.
  • Achieved a high hydraulic flux of 165 L m⁻² h⁻¹ bar⁻¹.
  • Demonstrated effective size discrimination of poly(ethylene oxide) solutes, consistent with theoretical models.

Conclusions:

  • The block copolymer self-assembly approach enables the creation of robust, nanoporous membranes without chemical cross-linking.
  • These membranes exhibit excellent performance characteristics for ultrafiltration applications.
  • The developed membranes show promise for size-selective separation of macromolecules.