Evolutionary pattern of liquid-liquid phase separation in amphiphilic molecular self-assembly during the natural aging process of strong-aroma Baijiu
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View abstract on PubMed
Summary
This summary is machine-generated.Liquid-liquid phase separation (LLPS) drives Baijiu aging by altering colloidal droplet structure and flavor. This process, involving ethanol densification, can be accelerated using electric fields for faster maturation.
Area Of Science
- Food Science
- Colloid and Surface Chemistry
- Chemical Engineering
Background
- Baijiu aging involves complex colloidal changes affecting sensory properties.
- Ethyl hexanoate and hexanoic acid are key components in fresh Baijiu's supersaturated state.
- Understanding the physicochemical drivers of Baijiu maturation is crucial for quality control.
Purpose Of The Study
- To identify the primary mechanism behind amphiphilic self-assembly during Baijiu aging.
- To investigate the role of liquid-liquid phase separation (LLPS) in Baijiu maturation.
- To explore methods for accelerating the aging process and improving sensory qualities.
Main Methods
- Characterization of Baijiu colloidal systems using microscopy and Raman mapping.
- Analysis of droplet size evolution and structural changes over a 10-year period.
- Evaluation of electric field-assisted aging for accelerated maturation.
Main Results
- Fresh Baijiu exhibits large LLPS droplets (∼38 μm) of ethyl hexanoate/hexanoic acid.
- Droplet size reduced by 73.68% over 10 years, forming hydrophobic-core/hydrophilic-shell structures.
- Ethanol densification within droplets was observed, correlating with reduced free ethanol and sensory mellowing.
- Electric field-assisted aging achieved 5-6 years of natural aging equivalence in 40 days.
Conclusions
- Liquid-liquid phase separation (LLPS) is the fundamental evolutionary driver of Baijiu aging.
- LLPS influences colloidal stability, ethanol distribution, and sensory development.
- Physicochemical insights from LLPS can optimize Baijiu production and enhance distilled spirit quality.
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