自分泌的有机水凝具有适应性滑,适用于极端环境
Li Wang1,2, Yi Zeng1, Wenbing Zhou1
1The Center of Functional Materials for Working Fluids of Oil and Gas Field, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, Sichuan, China.
ACS applied materials & interfaces
|July 16, 2025
概括
新型有机油 (OHG) 在极端条件下提供自主滑. 这些自我分泌的材料克服了传统的水凝限制,在干燥,潮湿和零下环境中提供有效的滑.
科学领域:
- 材料科学 材料科学 材料科学
- 部落学 (tribology) 是一个学科.
- 超分子化学 超分子化学
背景情况:
- 传统的水凝在极端环境下由于水损失和结而失败,限制了它们的滑能力.
- 受到大自然启发的自我分泌材料在恶劣条件下为部落学挑战提供了潜在的解决方案.
研究的目的:
- 开发一种新的有机凝 (OHG) 系统,用于在各种环境条件下进行自主滑.
- 调查OHG的温度和剪切反应自分泌能力.
主要方法:
- 在水凝矩阵内集成超分子器官凝,以创建OHG系统.
- 在干燥,潮湿和零度以下 (-10°C) 条件下对OHG滑性能进行评估.
- 与传统水凝相比,测量摩擦系数 (COF) 和膨胀行为.
主要成果:
- OHG在干燥条件下表现出有效的滑,通过自我分泌将COF从0.4降低到0.1.
- 稳定的低温滑 (COF为0.1) 在-10°C时实现.
- 在水性环境中,OHG由于水化和油相分泌的结合,达到0.07的COF.
- OHG表现出受控的水化膨胀,平衡时间比传统水凝长八倍,增强迁移和密封.
结论:
- 开发的OHG系统克服了依赖水分的水凝的局限性,在极端环境中提供强大的滑.
- OHG是一种有前途的下一代自滑材料,在油田开发,机器人技术和生物医学工程方面具有潜在的应用.
- 控制的膨胀和增强的密封性能使OHG适合要求高的应用程序,如深度配置控制.
相关概念视频
Cohesion
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a surface,...
On a surface,...
Adaptations that Reduce Water Loss
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
Surface Membrane Barriers
The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
Carbon-dioxide Fixation
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
Factors Influencing Microbial Growth: Osmolarity
Osmolarity is the measure of solute concentration in a solution. It plays a critical role in determining water availability for organisms. Water moves across semipermeable membranes through osmosis, flowing from regions of lower solute concentration (more dilute) to regions of higher solute concentration (more concentrated).In high-solute environments, microbial cells lose water, leading to dehydration and inhibited growth. The extent to which water is available to microbes in such environments...
iChip
The cultivation of environmental microorganisms has long been hindered by the inability to replicate complex native conditions in vitro. The isolation chip (iChip) addresses this limitation by facilitating the growth of previously uncultivable microorganisms through in situ incubation. Designed for high-throughput microbial cultivation, the iChip comprises hundreds of microchambers, each capable of housing a single microbial cell. These microchambers are loaded with a mixture of molten agar and...


