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Stabilizing Aqueous Three-Dimensional Printed Constructs Using Chitosan-Cellulose Nanocrystal Assemblies.

Dandan Lin1, Tan Liu1, Qingqing Yuan1

  • 1Beijing Advanced Innovation Center for Soft Matter Science and Engineering & State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.

ACS Applied Materials & Interfaces
|November 24, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed 3D printing for all-aqueous materials using cellulose nanocrystals (CNCs) and chitosan. This method creates stable liquid tubules for applications like heavy metal removal.

Keywords:
3D printingATPScellulose nanocrystalschitosanself-assembly

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomaterials

Background:

  • Aqueous two-phase systems (ATPS) offer unique interfaces for material assembly.
  • Nanoparticle assembly at interfaces enables novel fabrication techniques.
  • Developing sustainable, all-aqueous materials is a key challenge.

Purpose of the Study:

  • To demonstrate the 3D printing of all-aqueous materials using self-assembling nanoparticles.
  • To explore the formation and control of liquid tubules within ATPS.
  • To investigate the potential of these structures for functional applications, such as pollutant removal.

Main Methods:

  • Utilized cellulose nanocrystals (CNCs) and polyethylene glycol (PEG) in one aqueous phase.
  • Introduced chitosan and dextran in a second immiscible aqueous phase.
  • Observed nanoparticle diffusion and electrostatic interaction at the interface to form printable membranes.
  • Investigated control over tubule dimensions and stability.
  • Assessed heavy metal ion removal capabilities.

Main Results:

  • Successfully achieved 3D printing of all-aqueous tubules using CNCs and chitosan at the ATPS interface.
  • Demonstrated electrostatic interaction and rapid membrane formation enabling tubule fabrication.
  • Showcased broad control over tubule diameter, length, arrangement, and stability.
  • Confirmed the ability of the membranous layer to facilitate heavy metal ion removal via adsorption and diffusion.

Conclusions:

  • Presented a versatile platform for fabricating all-aqueous compartmentalized systems.
  • Highlighted the potential to couple system function with inherent nanoparticle or ligand properties.
  • Opened avenues for creating advanced, sustainable materials for separation and beyond.