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Updated: Sep 28, 2025
08:01
A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization
Published on: August 18, 2022
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Enhanced Control over Ice Nucleation Stochasticity Using a Carbohydrate Polymer Cryoprotectant
Bruno M Guerreiro1,2,3,4, Anthony N Consiglio5, Boris Rubinsky5
1UCIBIO - Applied Molecular Biosciences Unit, Department of Chemistry, School of Science and Technology, NOVA University Lisbon, Caparica 2819-516, Portugal.
ACS Biomaterials Science & Engineering
|April 5, 2022
Summary
FucoPol stabilizes metastable supercooling by reducing ice nucleation variability. This carbohydrate polymer enhances biopreservation potential by controlling ice formation temperature spread.
Area of Science:
- Biophysics
- Materials Science
- Chemical Engineering
Background:
- Metastable supercooling is crucial for ice-free biopreservation but limited by ice formation's stochastic nature.
- Controlling ice nucleation is essential for advancing biopreservation technologies.
- Bio-based polymers offer potential solutions for stabilizing supercooled water.
Purpose of the Study:
- To investigate the effect of FucoPol on the stability of metastable supercooled water.
- To quantify FucoPol's influence on ice nucleation stochasticity and induction time.
- To assess the potential of FucoPol in biopreservation applications.
Main Methods:
- Utilized an isochoric nucleation detection technique to study aqueous supercooling.
- Analyzed the concentration-dependent effects of FucoPol on water nucleation.
- Measured the spread of nucleation temperatures and induction times.
Main Results:
- FucoPol significantly stabilizes metastable supercooled water in a concentration-dependent manner.
- FucoPol reduces ice nucleation stochasticity, narrowing the nucleation temperature band by two-thirds compared to pure water.
- A minimal change in average nucleation temperature indicates the effect is not colligative freezing point depression.
Conclusions:
- FucoPol enhances the stability of supercooled water by reducing ice nucleation variability.
- High-viscosity polymer systems like FucoPol can manipulate phase change kinetics for subzero biopreservation.
- These findings are critical for engineering practical biopreservation protocols.
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