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Colloidal gelation with non-sticky particles

Author

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  • Yujie Jiang

    (University of Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Ryohei Seto

    (University of Chinese Academy of Sciences
    Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health)
    University of Hyogo)

Abstract

Colloidal gels are widely applied in industry due to their rheological character—no flow takes place below the yield stress. Such property enables gels to maintain uniform distribution in practical formulations; otherwise, solid components may quickly sediment without the support of gel matrix. Compared with pure gels of sticky colloids, therefore, the composites of gel and non-sticky inclusions are more commonly encountered in reality. Through numerical simulations, we investigate the gelation process in such binary composites. We find that the non-sticky particles not only confine gelation in the form of an effective volume fraction, but also introduce another lengthscale that competes with the size of growing clusters in gel. The ratio of two key lengthscales in general controls the two effects. Using different gel models, we verify such a scenario within a wide range of parameter space, suggesting a potential universality in all classes of colloidal composites.

Suggested Citation

  • Yujie Jiang & Ryohei Seto, 2023. "Colloidal gelation with non-sticky particles," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38461-1
    DOI: 10.1038/s41467-023-38461-1
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    References listed on IDEAS

    as
    1. Nicoletta Gnan & Emanuela Zaccarelli & Francesco Sciortino, 2014. "Casimir-like forces at the percolation transition," Nature Communications, Nature, vol. 5(1), pages 1-7, May.
    2. Joep Rouwhorst & Christopher Ness & Simeon Stoyanov & Alessio Zaccone & Peter Schall, 2020. "Nonequilibrium continuous phase transition in colloidal gelation with short-range attraction," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
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