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Abstract <p>Liquid crystals represent anisotropic media with orientation and optical properties selectively sensitive to orientants with supramolecular organization such as polymers and surfactants. Microfluidic channels offer new opportunities to control behavior of supramolecular media by specific dynamic and wall effects. This work focuses on characterizing responses of a nematic liquid crystal to polymer and surfactant solutions and their reactive flows in microfluidic confinement. Specific liquid crystalline textures were found to form in microchannels due to a combination of wall effects and the impact of polymer and surfactant solutions. A diffusion-reaction model was used to characterize behavior for microfluidic polymer-surfactant flows. The equations of the model were solved in Matlab to obtain concentration distribution of the interaction products with respect to flow dynamics, diffusivities of the reactants and microchannel geometry. It was shown that diffusion-reaction processes in microfluidic polymer-surfactant media can be monitored by analyzing orientation behavior of the infused liquid crystal and comparing the experimental data with the predictions of the model. The results can contribute to developing analytical chips for monitoring interactions in supramolecular-organized media in microfluidic models of biological capillary systems.</p>

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Microfluidic Reactive Media of Polymers and Surfactants: Modeling and Monitoring of Interactions by Integrated Liquid Crystal

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月24日

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  • Artem N. Bezrukov,
  • Yuriy G. Galyametdinov

摘要

Abstract

Liquid crystals represent anisotropic media with orientation and optical properties selectively sensitive to orientants with supramolecular organization such as polymers and surfactants. Microfluidic channels offer new opportunities to control behavior of supramolecular media by specific dynamic and wall effects. This work focuses on characterizing responses of a nematic liquid crystal to polymer and surfactant solutions and their reactive flows in microfluidic confinement. Specific liquid crystalline textures were found to form in microchannels due to a combination of wall effects and the impact of polymer and surfactant solutions. A diffusion-reaction model was used to characterize behavior for microfluidic polymer-surfactant flows. The equations of the model were solved in Matlab to obtain concentration distribution of the interaction products with respect to flow dynamics, diffusivities of the reactants and microchannel geometry. It was shown that diffusion-reaction processes in microfluidic polymer-surfactant media can be monitored by analyzing orientation behavior of the infused liquid crystal and comparing the experimental data with the predictions of the model. The results can contribute to developing analytical chips for monitoring interactions in supramolecular-organized media in microfluidic models of biological capillary systems.