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Reconfiguring Liquid Shapes Using Lignin Nanoparticles.

Jing Tian1, Qianhui Zhou1, Yujie Yang1,2

  • 1Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai, Yantai 264000, People's Republic of China.

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|January 21, 2026
PubMed
Summary

Researchers demonstrate how lignin nanoparticles (LNPs) create reconfigurable liquid materials. Adjusting pH reversibly alters liquid shapes, offering a novel approach for smart all-liquid constructs.

Keywords:
lignin nanoparticlesliquidsoil/water interfacereversible jammingshape reconfiguration

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Area of Science:

  • Materials Science
  • Colloid and Surface Chemistry
  • Green Chemistry

Background:

  • Liquid materials with reconfigurable shapes are crucial for smart all-liquid constructs.
  • Current methods often rely on nanoparticle surfactants for jamming/assembly at liquid interfaces.

Purpose of the Study:

  • To explore lignin nanoparticles (LNPs) as a simplified alternative to traditional nanoparticle surfactants.
  • To investigate the ability of LNPs to regulate liquid morphologies and enable shape reconfigurability.

Main Methods:

  • Utilizing lignin nanoparticles (LNPs) as Pickering emulsifiers at the soybean oil/water interface.
  • Investigating the effect of pH on LNP interfacial film properties and liquid structuring capacity.
  • Observing the jamming and assembly of LNPs at the interface to lock liquid droplets.

Main Results:

  • LNPs form jammed, highly elastic interfacial films at pH >4, enabling the locking of distorted oil and water droplets.
  • At lower pH values, LNPs agglomerate, decreasing interfacial binding energy and mechanical strength.
  • This pH-dependent behavior allows for reversible control over liquid shape reconfiguration.

Conclusions:

  • Lignin nanoparticles offer a green and simplified approach to creating reconfigurable liquid materials.
  • The pH-tunable interfacial properties of LNPs are key to controlling liquid morphologies.
  • This work paves the way for novel smart all-liquid constructs with potential applications in various fields.