在复杂的抗结冰液中自组装超分子凝,以创建具有增强性能的多元组件材料.
Nicole K McLeod1,2, Lee Stokes2, Jerry Lewis2
1Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
Langmuir : the ACS journal of surfaces and colloids
|December 5, 2025
概括
低分子量凝器 (LMWGs) 通过与聚合物形成混合凝来增强抗结冰液. 这些LMWG聚合物凝显著增加了液体保留时间,提高了飞机的安全.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 航空航天工程 航空航天工程
背景情况:
- 飞机防冰液对于航空安全至关重要,特别是在寒冷的天气条件下.
- 目前的抗结冰技术在性能和持续时间方面面临限制.
- 低分子量凝器 (LMWGs) 为新型材料配方提供了潜力.
研究的目的:
- 研究使用LMWG和聚合物添加剂在抗结冰液中的混合凝的配方.
- 评估这些混合凝对抗结冰液的性能和稳定性的影响.
- 评估LMWG修改的抗结冰液在提高飞机安全方面的潜力.
主要方法:
- 混合凝的配方使用二乙烯基醇 (DBS) 衍生物和聚合物添加剂在一个单二醇:水基.
- 凝性质的表征,包括凝形成度,热力学稳定性和刚性.
- 传输电子显微镜 (TEM) 用于可视化凝微结构.
- 改造的抗结冰液体的测试以提高性能,包括"停留时间"和空气动力学稳定性.
主要成果:
- 混合凝形成的度明显低于基溶剂,表明有协同作用的LMWG-聚合物相互作用.
- 高性能流体 (ABC S+,ABC K+) 形成更稳定,更硬的凝,组装速度更快.
- TEM揭示了纳米级纤维状网络,含有疏水凝器,显示附着的球状结构.
- 经LMWG修改的液体在"停留时间"中显著增加,而II型液体升级为IV型的性能显著改善.
- 空气动力学测试显示,凝在应力下降解.
结论:
- 可以有效地与聚合物共同配制LMWGs,以创建高性能抗结冰液体.
- LMWG与聚合物之间的相互作用显著影响凝特性和抗结冰性能.
- 由于延迟时间增加,LMWG修改的抗结冰液体显示出提高飞机安全的前景.
- 低成本和简单的配方使LMWGs成为改善抗结冰技术的可行选择.
更多相关视频
12:07Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
Published on: April 16, 2018
13.9K
05:24Author Spotlight: Improving the Production of Self-Assembling Fibers and Peptide Hydrogels for Superior Biocompatibility
Published on: September 6, 2024
1.7K
相关概念视频
Recrystallization: Solid–Solution Equilibria
4.1K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
4.1K
Colloidal precipitates
5.7K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
5.7K
Accelerators
374
Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
The effectiveness of calcium chloride can...
The effectiveness of calcium chloride can...
374
Superplasticizers
468
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
468
Frost Resistant Concrete
539
Concrete's susceptibility to frost damage during freeze-thaw cycles demands strategic measures to enhance its frost resistance. Employing techniques like air entrainment, adjusting the water-cement ratio, proper curing, and selecting appropriate aggregates are essential.
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of...
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of...
539
