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Nanochemistry
Rheo-nmr Velocimetry Of Nanocrystalline Cellulose Suspensions.

Home
Research Domains
Chemical Sciences
Macromolecular And Materials Chemistry
Nanochemistry
Rheo-nmr Velocimetry Of Nanocrystalline Cellulose Suspensions.

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Rheo-NMR velocimetry of nanocrystalline cellulose suspensions.

Maribelle A Stanley¹, Jayesha S Jayaratne¹, Sarah L Codd²

¹Chemical and Biological Engineering Department, Montana State University, Bozeman, MT, United States of America.

Applied Rheology (Lappersdorf, Germany : Online)

|August 14, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Nanocrystalline cellulose (NCC) suspensions exhibit complex flow behaviors, including wall-slip and shear banding, not always evident in standard rheometry. Rheo-nuclear magnetic resonance (NMR) velocimetry reveals detailed flow dynamics crucial for material processing and property control.

Keywords:

colloidal suspensions complex fluids nanocrystalline cellulose shear-banding

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Area of Science:

Materials Science
Fluid Dynamics
Polymer Science

Background:

Nanocrystalline cellulose (NCC) is a promising biomaterial for composites and advanced materials.
Standard rheometry often fails to capture the complex flow behavior of NCC suspensions.
Understanding the flow dynamics of NCC is critical for controlling material properties.

Purpose of the Study:

To investigate the intricate flow behavior of NCC suspensions using advanced techniques.
To correlate mesoscale velocity distributions with bulk rheological properties.
To provide insights for optimizing processing conditions and material performance.

Main Methods:

Rheo-nuclear magnetic resonance (NMR) velocimetry was employed to achieve high spatial and temporal resolution.

velocity fluctuations

Standard rheometry was used for comparative analysis.

Analysis of velocity fluctuations and distributions in NCC suspensions.

Main Results:

NCC suspensions display complex flow phenomena such as wall-slip, shear banding, and yielding, even when bulk rheology appears simple.
Large velocity fluctuations were observed in chiral nematic liquid crystal-phase NCC suspensions, indicating particle tumbling.
Detailed mesoscale velocity distributions in space and time were mapped.

Conclusions:

Rheo-NMR velocimetry offers critical insights into NCC suspension flow beyond standard rheological measurements.
The findings aid in interpreting rheology data and optimizing processing for desired NCC microstructure and material properties.
This research provides a foundation for controlling the performance of NCC-based composites and materials.