用纳米泡来定制水动力学:对水凝固的气体依赖调节效应
Natsuki Yamamoto1, Arata Kioka2
1Graduate School of Engineering, Kyushu University, Fukuoka, Japan.
Journal of colloid and interface science
|October 10, 2025
概括
纳米气泡 (NBs) 影响水固化时间. 空气NB延迟结,而二氧化碳NB加速结,为控制水相转换提供了一种新的方法.
科学领域:
- 物理化学 物理化学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 水的液态到固态相变 (固化) 是一个由各种因素影响的关键过程.
- 纳米气泡 (NBs) 是微观的气泡,具有独特的界面特性.
- 在NB中不同气体物种对水固化的影响仍然是活跃研究的领域.
研究的目的:
- 研究纳米气泡如何影响水固化所需的时间.
- 要确定用于创建NBs的气体物种是否会影响固化过程.
- 探索与接口电特性和冰核形成相关的潜在机制.
主要方法:
- 实验室实验测量水固化时间在-10°C和-20°C与空气和CO2 NBs.
- 过渡热传导的数值模拟,以评估相位过渡期间的明显能量变化.
- 对实验结果和模拟数据进行比较分析,以将NBs的影响与能量释放相关联.
主要成果:
- 空气NB延迟了水固化的8.7%±1.9%,而CO2NB则在-20°C下加速了水固化的11.4%±2.5%.
- 模拟表明,这些变化对应于空气NB的明显能量增加+8%±2%,而CO2NB的明显能量增加减少-10%±2%.
- 观察到的效应归因于OH-离子和CO3的霍夫迈斯特式行为2-).
结论:
- 纳米气泡显著改变水固化时间,其影响取决于气体种类.
- 空气和二氧化碳 NBs 显示对水结动态有相反的影响.
- NBs代表了一种有前途的"绿色"纳米材料,用于控制水和防应用.
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