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Related Experiment Video

Updated: Apr 19, 2026

Encapsulation and Permeability Characteristics of Plasma Polymerized Hollow Particles
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Splaying hyperthin polyelectrolyte multilayers to increase their gas permeability.

Song Yi1, Cen Lin, Steven L Regen

  • 1Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, USA. slr0@lehigh.edu.

Chemical Communications (Cambridge, England)
|December 16, 2014
PubMed
Summary
This summary is machine-generated.

Researchers developed splayed, hyperthin polyelectrolyte multilayers (PEMs) using bulky pendant groups. This innovation enhances gas permeability in PEMs while maintaining selectivity, a key advance for membrane technology.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Membrane Technology

Background:

  • Polyelectrolyte multilayers (PEMs) are crucial in various applications, but their gas permeability is often limited.
  • Improving gas permeability without sacrificing selectivity is a significant challenge in membrane science.

Purpose of the Study:

  • To introduce and demonstrate the concept of splayed, hyperthin polyelectrolyte multilayers (PEMs).
  • To enhance the gas permeability of PEMs by incorporating bulky, hydrophilic, and charged pendant groups.
  • To maintain or improve the permeation selectivity of PEMs with enhanced permeability.

Main Methods:

  • Fabrication of nm-thick PEMs using layer-by-layer assembly.
  • Utilizing poly(sodium 4-styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH).
  • Incorporating bulky cobaltocenium ions as charged pendant groups within the PEM structure.

Main Results:

  • Successful creation of splayed, hyperthin PEMs with significantly increased gas permeability.
  • Demonstrated that the bulky pendant groups enhance permeability without compromising selectivity.
  • Proof-of-principle established for the splayed PEM concept.

Conclusions:

  • Splayed PEMs offer a novel strategy for designing high-performance gas separation membranes.
  • The incorporation of bulky, charged pendant groups is an effective method to tune PEM properties.
  • This approach holds promise for advanced membrane applications requiring high flux and selectivity.