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Lignin Particles for Multifunctional Membranes, Antioxidative Microfiltration, Patterning, and 3D Structuring.

Oriol Cusola1,2, Orlando J Rojas2,3, M Blanca Roncero1

  • 1CELBIOTECH Research Group , Escola Superior d'Enginyeries Industrial, Aeroespacial i Audiovisual de Terrassa , 08222 Terrassa , Spain.

ACS Applied Materials & Interfaces
|November 9, 2019
PubMed
Summary
This summary is machine-generated.

We developed novel lignin particle (LP) and cellulose nanofibril (CNF) membranes for advanced microfiltration. These sustainable, nonfouling membranes offer excellent antioxidative and UV-blocking properties, paving the way for new material applications.

Keywords:
3D structuresantioxidantcellulose nanofiberslignin particlesmembrane microfiltration

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Area of Science:

  • Materials Science
  • Polymer Science
  • Biomaterials

Background:

  • Lignin and cellulose are abundant biopolymers with inherent synergistic properties.
  • Developing sustainable and functional membranes from biopolymers is a key research area.
  • Existing membranes often face challenges with fouling, limited functionality, and environmental impact.

Purpose of the Study:

  • To engineer novel particle-based membranes using lignin particles (LPs) and cellulose nanofibrils (CNFs).
  • To investigate the potential of these membranes for antioxidative separation, UV blocking, and nonfouling applications.
  • To demonstrate the versatility of LPs as precursors for multifunctional materials.

Main Methods:

  • Combination of lignin particles (LPs) and cellulose nanofibrils (CNFs) to form membranes.
  • Characterization of membrane properties including surface energy, water resistance, porosity, and mechanical toughness.
  • Evaluation of antioxidative capacity using ABTS radical inhibition assay.
  • Assessment of nonfouling properties via protein adhesion and activity rate tests.
  • Analysis of UV transmittance and mechanical performance.

Main Results:

  • Developed water-resistant, low surface energy membranes with uniform porous structures.
  • Achieved high effluent oxidation rates (95 mL/cm²) demonstrating effective antioxidative separation.
  • Demonstrated nonfouling characteristics and significant UV radiation blocking capacity.
  • Created tough, self-standing architectures with high LP content (up to 92 w/w%) enabled by CNF.
  • Successfully fabricated thin films, 3D structures, and patterned geometries.

Conclusions:

  • Unmodified lignin particles can be utilized in flexible membranes for active microfiltration.
  • The combination of LPs and CNFs yields multifunctional materials with tunable properties.
  • The size and shape of lignin particles significantly influence membrane performance.
  • These findings highlight the potential of lignin particles as precursors for next-generation biomaterials.