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Related Experiment Video

Updated: Jun 16, 2026

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Simple Strategies to Quantify and Control Polymer Threading into Micropores.

Supreet Kaur1, Benjamin Lesea-Pringle1,2, Surya Marjit1

  • 1Nanoscience Initiative, CUNY Advanced Science Research Center, New York, New York 10031, USA.

Journal of the American Chemical Society
|June 9, 2025
PubMed
Summary

We developed new methods to track and control how polymers enter microporous particles. This breakthrough enables better design for advanced materials like membranes and catalysts.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Polymer-microporous particle blends are crucial for technologies like membranes, catalysts, and nanocomposites.
  • Current limitations exist in quantifying and controlling polymer threading into sub-2 nm micropores, hindering performance and design.
  • Understanding polymer-particle interactions is key to advancing these materials.

Purpose of the Study:

  • To develop novel strategies for quantifying and controlling polymer threading into microporous particles.
  • To enable precise manipulation of polymer-microporous particle interfaces for technological applications.
  • To overcome current limitations in the design and performance of polymer-based advanced materials.

Main Methods:

  • Utilized solution-state Nuclear Magnetic Resonance (NMR) spectroscopy for label-free, in situ monitoring of polymer chain diffusion into microporous particles.
  • Quantified polymer diffusivities by observing the disappearance of NMR signals as polymer chains enter particles due to slow molecular tumbling.
  • Engineered particle surface properties via noncovalent self-assembly of coatings to tune polymer threading rates across six orders of magnitude.

Main Results:

  • Demonstrated that solution-state NMR can directly monitor and quantify polymer chain threading into microporous particles.
  • Showcased the ability to control polymer threading rates over a 6-order-of-magnitude range by modifying particle surface coatings.
  • Confirmed that particle size, micropore topology, and polymer chain length were not altered during threading rate modulation.

Conclusions:

  • Developed simple, generalizable strategies to quantify and control polymer threading into microporous particles.
  • These methods are applicable to a wide range of polymer/particle systems, solvents, temperatures, and concentrations.
  • The findings are expected to drive advancements in diverse technological and fundamental areas relying on polymer-microporous particle composites.