Related Experiment Video
Updated: Jul 10, 2025
Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes
Published on: February 19, 2016
Low-Frequency Ultrasound Effects on Cellulose Nanocrystals for Potential Application in Stabilizing Pickering
Louise Perrin1,2, Stephane Desobry1, Guillaume Gillet2
1Laboratory of Biomolecules Engineering (LIBio), University of Lorraine, 2 Avenue de la Foret de Haye, BP 20163, 54500 Vandœuvre-les-Nancy, France.
Low-frequency ultrasound (LFU) treatment breaks cellulose nanocrystal (CNC) aggregates, altering CNC suspension rheology without changing CNC chemical or physical properties. Liquid crystal formation was observed in CNC suspensions and Pickering emulsions (PEs) during storage.
Area of Science:
- Materials Science
- Colloid and Surface Chemistry
- Biomaterials Engineering
Background:
- Cellulose nanocrystals (CNCs) are effective biomaterials for stabilizing Pickering emulsions (PEs).
- Low-frequency ultrasound (LFU) treatment is commonly used in PE formation and can influence CNC properties.
Purpose of the Study:
- To investigate the specific effects of LFU treatment on the chemical and physical properties of CNCs.
- To understand how LFU treatment impacts CNC suspensions and their potential role in Pickering emulsion stability.
Main Methods:
- Characterization of CNCs using dynamic light scattering, ζ-potential, FTIR, XRD, and contact angle measurements.
- Rheological analysis and static multiple light scattering of CNC suspensions.
- Observation of liquid crystal formation using cross-polarized light during storage.
Main Results:
- LFU treatment effectively broke CNC aggregates, leading to modified rheological behavior of CNC suspensions.
- LFU treatment did not alter the chemical structure, crystallographic structure, surface charge, or hydrophilic properties of CNCs.
- Liquid crystal formation was observed in stored CNC suspensions and PEs.
Conclusions:
- LFU treatment is a viable method for modifying CNC suspensions for emulsion stabilization without compromising intrinsic CNC properties.
- The observed liquid crystal formation in CNCs and PEs suggests a potential mechanism influencing Pickering emulsion stability.
More Related Videos
11:26Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation
Published on: June 17, 2014
08:28Synthesis of Phase-shift Nanoemulsions with Narrow Size Distributions for Acoustic Droplet Vaporization and Bubble-enhanced Ultrasound-mediated Ablation
Published on: September 13, 2012