优化盐泄漏缓解和比较聚烯胺基凝的吸附-脱落特性
Yimo Liu1, Zhongbao Liu1, Zhipeng Qie1
1Department of Environment and Life, Beijing University of Technology, Beijing 100124, China.
Polymers
|February 24, 2024
概括
研究人员开发了一种新型的聚烯胺凝 (PAM-LiCl) 用于大气中的水收集. 这种材料表现出优异的吸水能力,并防止盐分泄漏,为有效的收集水提供了一个有前途的解决方案.
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.
- 环境科学 环境科学
背景情况:
- 固体湿透材料对于大气水收集 (AWH) 等应用至关重要,但盐泄漏可能会阻碍性能.
- 加入无机盐可以增强吸附,但会带来诸如材料降解和效率降低等挑战.
研究的目的:
- 开发一种新的湿度可观材料,用于高效地收集大气中的水.
- 为了克服传统盐基吸附剂中观察到的盐泄漏问题.
- 评估新材料的吸水和收集性能.
主要方法:
- 通过自由基聚合合成的聚烯胺水凝.
- 将化纳入水凝矩阵,以创建PAM-LiCl.
- 在不同的相对湿度条件下,将PAM-LiCl与多孔吸附剂 (AlFum-LiCl) 进行比较.
- 进行了大气水收集实验,以量化水的输出.
主要成果:
- 优化的PAM-LiCl表现出极好的吸水能力,没有盐分泄漏,最高可吸收3.5g/g的水.
- 在25°C,PAM-LiCl在30%RH下达到1.26g/g的平衡水吸量,在75%RH下达到3.15g/g.
- 使用PAM-LiCl进行的大气水收集实验,每天的水输出量为8.34 L/kg (30%RH) 和16.86 L/kg (75%RH).
- 由于孔隙结构和盐泄漏,AlFum-LiCl在高吸水量时表现出局限性.
结论:
- 与AlFum-LiCl相比,盐优化的PAM-LiCl水凝显示出优越的吸水能力和稳定性.
- PAM-LiCl适用于在较高相对湿度的环境中收集大气中的水,而无需光.
- 这种水凝为大规模大气水收集应用提供了一个有前途,稳定和高效的材料.
更多相关视频
09:09Synthesis of PolyN-isopropylacrylamide Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability
Published on: February 27, 2016
10.0K
07:32Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
Published on: April 7, 2017
9.4K
相关概念视频
Factors Affecting Solubility
32.2K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
32.2K
Physical Properties of Carboxylic Acid Derivatives
2.6K
Intermolecular forces dictate several physical properties such as boiling points, melting points, solubilities, and so forth. They are classified into four types: ionic forces, hydrogen bonds, dipole–dipole forces, and dispersion forces. Ionic forces are the strongest, while dispersion forces are the weakest.
Among the carboxylic acid derivatives, the boiling points of acid chlorides and esters are very similar and are the lowest in the series. Acid anhydrides have slightly higher boiling...
Among the carboxylic acid derivatives, the boiling points of acid chlorides and esters are very similar and are the lowest in the series. Acid anhydrides have slightly higher boiling...
2.6K
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
Ion Exchange
1.6K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.6K
Retarders
350
Retarders are chemical admixtures designed to extend the setting time, which is especially useful when there is a delay in sequential concrete pours to prevent cold joints and to achieve a cohesive structure. Retarders, when used in appropriate amounts, can also enhance the architectural appearance of exposed aggregate finishes.
The function of retarders is to delay the setting of concrete, and this effect can be measured using a penetration test. The retardation process involves adding...
The function of retarders is to delay the setting of concrete, and this effect can be measured using a penetration test. The retardation process involves adding...
350
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
