通过介电松强度比,通过水和水凝之间的介电松强度比来确定水凝的多孔性
Maksym M Lazarenko1, Yuriy F Zabashta1, Dmytro K Honcharuk1
1Taras Shevchenko National University of Kyiv, 64, Volodymyrska Street, Kyiv, 01601, Ukraine. lazmaxs@knu.ua.
Soft matter
|May 12, 2025
概括
这项研究介绍了一种由两个组件组成的水凝模型 (固体和软体) 和一种介电光谱法来测量水凝的多孔性. 该技术量化了自由水含量,揭示了凝和糖水凝中的多孔性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 物理化学 物理化学
背景情况:
- 水凝是复杂的材料,在各种领域都有应用.
- 了解水凝结构,特别是含水量,对于预测它们的特性至关重要.
- 现有的孔径测定方法可能是复杂的或间接的.
研究的目的:
- 提出基于固体和软元件的水凝结构模型.
- 开发一种使用介电光谱学测定水凝多孔性的新方法.
- 通过测量凝和糖水凝的多孔性来验证该方法.
主要方法:
- 概念化水凝作为聚合物网络 (固体) 和自由水 (软体) 的复合物.
- 应用了方向缺陷理论,将自由水体积与缺陷度联系起来.
- 使用介电谱法测量介电松强度,将其与孔隙性相关联.
主要成果:
- 开发了一种方法来计算水凝的多孔性,即水凝放松强度与水放松强度的比率.
- 确定了0.48 (12%聚合物) 和0.35 (35%聚合物) 的凝水凝多孔度.
- 在0.83 (1.5%的聚合物) 和0.69 (2%的聚合物) 测量了阿加罗斯水凝的多孔性.
结论:
- 拟议的双组件水凝模型为了解水凝结构提供了一个框架.
- 介电光谱学为量化水凝多孔性提供了一种直接且有效的方法.
- 该方法准确地测量了诸如凝和糖等常见水凝中的多孔性.
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