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Ultrasonically regenerable nano-phase change emulsions with low supercooling and high shear stability

Yuyao Guo Jinxin Feng Zhihao Xia Ziye Ling Xiaoming Fang Zhengguo Zhang

工业化学与材料（英文）2026，Vol.4Issue(2)：212-225,14.

工业化学与材料（英文）2026，Vol.4Issue(2)：212-225,14.DOI:10.1039/d5im00104h

Ultrasonically regenerable nano-phase change emulsions with low supercooling and high shear stability

Ultrasonically regenerable nano-phase change emulsions with low supercooling and high shear stability†

Yuyao Guo ¹Jinxin Feng ²Zhihao Xia ²Ziye Ling ³Xiaoming Fang ³Zhengguo Zhang³

作者信息

1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation,The Ministry of Education,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou,510640,China
2. Guangdong Engineering Technology Research Center of Efficient Heat Storage and Application,South China University of Technology,Guangzhou 510640,China
3. Key Laboratory of Enhanced Heat Transfer and Energy Conservation,The Ministry of Education,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou,510640,China||Guangdong Engineering Technology Research Center of Efficient Heat Storage and Application,South China University of Technology,Guangzhou 510640,China
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摘要

Abstract

Nano-phase change emulsions(NPCEs)are attractive thermal fluids for applications such as cold-chain logistics,vaccine storage,and low-temperature energy systems operating in the 0-20 ℃ range.However,their deployment is hindered by significant supercooling and poor stability under shear.Here,we report a formulation strategy combining surfactant and nucleating agent optimization to prepare NPCEs with suppressed supercooling(<0.5 ℃)and high dispersion stability.The NPCEs maintain structural integrity after 24 h of continuous shear at 5 ℃,with droplet size variation within 20 nm.Rheological and microscopic analyses elucidate the interfacial disruption mechanism under low-temperature shear,and a nucleating agent selection principle is established based on molecular conformation and crystallization compatibility.To address performance degradation,we develop a high-energy ultrasonic on-line regeneration method that rapidly restores thermal functionality without system downtime.The NPCEs achieve>99.5%latent heat recovery and maintain stable performance over 60 days of thermal and mechanical cycling.This work demonstrates a regenerable NPCE system featuring ultra-low supercooling and long-term operational stability.The findings offer a practical pathway for scalable deployment of advanced thermal fluids in energy-efficient industrial applications.

关键词

Nano-phase change emulsions/Low-temperature stability/Supercooling control/High-energy regeneration technique/Nucleating agent selection

Key words

Nano-phase change emulsions/Low-temperature stability/Supercooling control/High-energy regeneration technique/Nucleating agent selection

引用本文复制引用

Yuyao Guo,Jinxin Feng,Zhihao Xia,Ziye Ling,Xiaoming Fang,Zhengguo Zhang..Ultrasonically regenerable nano-phase change emulsions with low supercooling and high shear stability[J].工业化学与材料（英文）,2026,4(2):212-225,14.

基金项目

This work is supported by Dongguan Key Research&Development Program(No.20231200300152). （No.20231200300152）

工业化学与材料（英文）

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