在空气/水接口处压缩变形的微凝
Takahisa Kawamoto1, Kohei Yanagi1, Yuichiro Nishizawa1
1Graduate School of Textile Science & Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan.
Chemical communications (Cambridge, England)
|October 13, 2023
概括
研究人员研究了水凝微球 (微凝) 压缩在接口. 微凝结构和交联度影响了压缩行为,揭示了材料设计的关键关系.
科学领域:
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
- 聚合物科学 聚合物科学
背景情况:
- 水凝微球 (微凝) 由于其交联的聚合物网络,具有独特的特性.
- 研究微凝在接口上的行为对于了解它们的应用潜力至关重要.
- 变形的微凝在接口上表现出复杂的行为.
研究的目的:
- 为了研究空气/水界面上的变形水凝微球 (微凝) 的压缩.
- 为了阐明微凝阵列结构和压缩行为之间的关系.
- 了解交叉连接度对微凝接口特性的影响.
主要方法:
- 使用Langmuir-Blodgett槽进行受控压缩实验.
- 使用光显微镜同时进行现场可视化,以实时观察.
- 合成和特征的微凝具有不同程度的交叉连接.
主要成果:
- 成功研究了微凝在空气/水接口上的压缩行为.
- 在微凝阵列结构和压缩特性之间建立了明确的关系.
- 交叉连接的程度被确定为调节界面压缩的关键因素.
结论:
- 这项研究阐明了水凝微球在接口上的压缩力学.
- 微凝结构和交叉连接程度是界面行为的关键决定因素.
- 结果为设计用于接口应用的先进水凝基材料提供了洞察力.
相关概念视频
01:13Excess Pressure Inside a Drop and a Bubble
The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
01:24Carbonation Shrinkage
Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage.
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction facilitates the...
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction facilitates the...