在海水淡化过程中,微调水结构和运输在功能化碳纳米管膜中
1School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology Guangzhou 510640 P. R. China jianzhou@scut.edu.cn.
RSC advances
|April 3, 2024
概括
这项研究使用了分子动力学模拟来优化碳纳米管膜中的水运输,用于淡化. 功能化纳米管表面和控制直径精确调节水流和结构,以提高膜性能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 物理化学 物理化学
背景情况:
- 淡化过程依赖于通过膜进行高效的水运输.
- 纳米结构膜,特别是碳纳米管 (CNTs),提供了提高水的透性的潜力.
- 在纳米尺度上控制水的行为对于膜设计至关重要.
研究的目的:
- 研究碳纳米管直径和表面功能的对水分子运输的影响.
- 了解纳米管内部的水结构如何影响水的透性.
- 确定在纳米结构膜中调节水运输的策略,用于海水淡化.
主要方法:
- 使用了分子动力学模拟.
- 四个扶手椅类型的碳纳米管 ((7,7), (8,8), (9,9), (10,10)) 模拟了~1nm孔径.
- CNT的内部表面被基 (-OH),甲基 (-CH3) 和 (-F) 基修饰.
主要成果:
- 水上运输依赖于封闭的水结构,可以通过CNT直径和化学功能调节.
- 增加CNT直径会改变水结构,从单层到六角/无序,影响水的透度.
- -OH组在 (7,7) CNT中订购了水,但在更大的 CNT中破坏了它,增加了摩擦.
- -CH3集团在 (7,7) CNT推广单档水,在 (8,8) 和 (9,9) CNT改善运输.
- 大多数CNT的化破坏了水的秩序,降低了透度,除了在 (8,8) CNT中增强方形结构外.
- 低四面体顺序与单层水,快速扩散和高透性相关;四面体的增加导致了类似冰的结构,更低的扩散和透性.
结论:
- 通过纳米结构膜的水运输可以通过控制通道直径和表面化学物质来精确调节.
- 功能化碳纳米管提供了一个可调节的平台,用于优化水淡化.
- 了解和操纵纳米水结构是设计高性能膜的关键.
相关概念视频
01:25Aquaporins
4.8K
Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
4.8K
01:23Transcellular Transport of Solutes
3.6K
Transcellular transport of solutes is the movement of substances like monosaccharides and amino acids through polarized cells. This transport mechanism is primarily seen in epithelial and endothelial cells aided by membrane transport proteins such as channels and transporters. The tight junctions between these cells confine the membrane proteins to the two sides of the cell. The epithelial cells have distinct apical and basolateral domains. In contrast, the endothelial cells show the luminal...
3.6K
02:34Water and Mineral Acquisition
33.0K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
33.0K
01:44The Significance of Membrane Transport
25.7K
The transport of solutes across the cell membrane is essential for metabolic processes, like maintaining cell size and volume, generating the action potential, exchanging nutrients and gases, etc. Membrane transport can be either passive or active. It can be simple diffusion, facilitated, or mediated transport aided by transport proteins such as transporters and channels.
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
Transporters facilitate either an active or passive movement of solutes. They can allow a single-molecule transport down its...
25.7K