在矿物体内同时形成冰网,并抑制体积膨胀
Hongkun Li1,2,3,4, Yunchen Long1,2,3, Junda Shen1,2
1Hong Kong Branch of National Precious Metals Material Engineering Research Center, City University of Hong Kong, 999077 Hong Kong SAR, China.
The journal of physical chemistry letters
|January 19, 2026
概括
微小的矿物颗粒,如石,显著减少水的体积膨胀在结时. 这一发现为矿物颗粒与水的相互作用提供了新的见解,影响了从土壤科学到生物矿物化的领域.
科学领域:
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
背景情况:
- 水的结行为对地球的生命和景观至关重要.
- 目前控制冰的方法使用冰结构蛋白或纳米材料.
- 控制水在结时的膨胀是一个持续的挑战.
研究的目的:
- 为了研究矿物颗粒对水结冰膨胀的影响.
- 探索常见矿物质在调节水的相变中的潜力.
- 了解矿物质诱导水膨胀抑制背后的机制.
主要方法:
- 使用石的状沉物,一个常见的地球矿物质.
- 在低温下测量水体积膨胀 (243 K).
- 使用光谱技术 (隐含) 分析水与矿物相互作用的结构.
主要成果:
- 石灰岩颗粒在243K时减少了69%的水膨胀 (从8.4%降至2.6%).
- 在矿物表面形成有序的"类似冰的"水网络.
- 这些水网的异质核化限制了自由水,阻止了扩张.
结论:
- 常见的矿物质,如石,可以有效地抑制结时的水体积膨胀.
- 这种现象是由表面结合的水化水晶化驱动的.
- 这些发现对生物矿物化,水文学,土壤科学和石质学有影响.
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