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Shear-Induced Reactive Gelation.

Bastian Brand1, Massimo Morbidelli1, Miroslav Soos1

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Langmuir : the ACS Journal of Surfaces and Colloids
|October 22, 2015
PubMed
Summary
This summary is machine-generated.

We developed a novel method for creating porous polymer particles with uniform pore sizes using shear-induced reactive gelation. This technique allows control over particle structure and demonstrates strong perfusive properties for chromatography applications.

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Area of Science:

  • Polymer Science
  • Materials Science
  • Chemical Engineering

Background:

  • Producing porous polymer materials with controlled pore size distribution is challenging.
  • Existing methods often lack precise control over internal structure and pore uniformity.

Purpose of the Study:

  • To describe a new method for synthesizing porous polymer particles with narrow pore size distribution.
  • To investigate the influence of shear rates and residence time on particle structure.
  • To evaluate the perfusive properties of the synthesized porous materials.

Main Methods:

  • Utilizing shear-induced reactive gelation with poly(styrene-co-divinylbenzene) primary particles.
  • Assembling particles into fractal-like clusters within a microchannel under high shear rates.
  • Employing thermally induced postpolymerization for enhanced mechanical resilience.
  • Characterizing pore structure using nitrogen sorption and mercury porosimetry.
  • Assessing perfusive properties via chromatographic column packing.

Main Results:

  • Achieved porous polymer particles with fractal dimensions ranging from 2.4 to 2.7, controllable by residence time.
  • Synthesized materials exhibit 70% porosity, surface areas of 20-40 m²/g, and narrow pore size distribution (~700 nm).
  • Confirmed strong perfusive character suitable for chromatographic applications.

Conclusions:

  • Shear-induced reactive gelation is an effective method for producing tailored porous polymer microclusters.
  • The synthesized materials possess desirable properties for separation and chromatographic applications.
  • This approach offers precise control over the internal structure of porous polymer particles.