相关实验视频
Updated: Aug 11, 2026
16:00
Fabrication of the Thermoplastic Microfluidic Channels
Published on: February 3, 2008
13.4K
拓分类:通过在纳米孔中浸泡来分离线性/恒星聚合物混合组件
Panagiotis Kardasis1, Ioannis Tzourtzouklis1, Alkmini D Nega2
1Department of Physics, University of Ioannina, 45110 Ioannina, Greece.
The Journal of chemical physics
|January 31, 2024
概括
这项研究探讨了纳米多孔氧化 (AAO) 通道中的聚合物混合物行为. 线性和恒星聚合物表现出明显的浸泡和吸附动力学,浸泡时间预测吸附.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 了解聚合物在狭窄空间中的行为对于纳米技术至关重要.
- 聚合物混合物表现出由建筑和限制影响的复杂动态.
研究的目的:
- 为了研究线性和星型cis-1,4-多聚烯混合物在纳米孔氧化 (AAO) 中的浸泡和吸附动力学.
- 探索聚合物架构和粘度对限制动态的影响.
- 为了建立沉浸和吸附时间表之间的关系.
主要方法:
- 现场纳米电光谱学被用来监测聚合物链动态.
- 使用了对称的线性/星型cis-1,4-多索混合物,其摩尔质量不同.
- 分析的重点是最长的链模式和介电强度的演变.
主要成果:
- 线性聚合物和恒星聚合物之间的浸泡动力学有所不同,较低粘度的成分首先透.
- 与同聚合物相比,吸附动力学在混合物中通常较慢,除非线性链作为恒星的稀释剂,诱导拓分类.
- 确定了一个通用关系 (τads ∼10 × tpeak),将吸附时间 (τads) 与孔隙填充时间 (tpeak) 联系起来.
结论:
- 沉浸时间表是控制纳米孔中的聚合物吸附动力学的关键因素.
- 聚合物架构显著影响了封闭行为和自我组装.
- 这些发现使得基于沉浸动态的各种聚合物架构的吸附时间可以预测.
相关概念视频
01:14Extraction: Partition and Distribution Coefficients
The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
For extracting a solute from an aqueous phase into an organic...
For extracting a solute from an aqueous phase into an organic...
01:09Analyte Adsorption and Distribution
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and solvents...