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Micellar Lyotropic Nematic Gels.

Sonja Dieterich1, Friedrich Stemmler1, Natalie Preisig1

  • 1Institute of Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany.

Advanced Materials (Deerfield Beach, Fla.)
|January 18, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed the first lyotropic nematic gels by using non-amphiphilic gelators. These new liquid crystal (LC) nematic gels offer mechanical stability while retaining the optical properties of LC nematic phases.

Keywords:
low-molecular-weight gelatorslyotropic liquid crystalslyotropic nematic gelsself-assembled fibrillar networks

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Area of Science:

  • Materials Science
  • Soft Matter Physics
  • Polymer Chemistry

Background:

  • Lyotropic liquid crystal (LLC) gels combine anisotropy of micellar LLCs with gel mechanical stability.
  • Previous LLC gels were limited to lamellar and hexagonal structures.
  • Obtaining nematic LLC gels remained a challenge.

Purpose of the Study:

  • To present the first examples of lyotropic nematic gels.
  • To establish a method for producing lyotropic nematic gels.
  • To explore their potential applications.

Main Methods:

  • Utilizing gelators with non-amphiphilic molecular structures.
  • Incorporating these gelators into existing lyotropic nematic phases.
  • Characterizing the resulting gel properties.

Main Results:

  • Successfully synthesized lyotropic nematic gels for the first time.
  • The non-amphiphilic gelators preserved micellar aggregate size and shape.
  • The resulting gels exhibited mechanical stability and retained optical birefringence and orientational order.
  • A reproducible method for large-scale production was established.

Conclusions:

  • Lyotropic nematic gels are now accessible.
  • These gels combine the desirable properties of liquid crystals and gels.
  • They show promise for applications in elastic, anisotropic, water-based stimuli-responsive actuators and sensors.