对具有高强度和高性的纯紫离子水凝的新见解
Haiyan Yin1, Min You1, Xinlei Shi1
1Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, 352001, Zhejiang, China. yinhy@ucas.ac.cn.
Materials horizons
|June 14, 2024
概括
通过一种新的液态-液态相分离,纯粹的zwitterionic水凝通过一种新的液态-液态相分离实现高强度和性. 这一突破提高了它们的耐用性,用于组织工程和柔性电子的先进应用.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
背景情况:
- 兹威特离子水凝具有优良的抗污染性能和离子通道定向.
- 纯的zwitterionic水凝通常具有较低的机械强度和性.
研究的目的:
- 开发具有增强机械性能的纯粹zwitterionic水凝.
- 为了研究改善水凝性能背后的机制.
主要方法:
- 在高度 (≥50%重量%) 的可聚合的兹维特里昂单体中诱导液体-液体相分离.
- 描述产生的水凝的机械性能 (压力强度,性).
- 分析网络结构和潜在的相互作用.
主要成果:
- 获得了高压力强度 (6.5 MPa) 和性 (2.12 kJ m-2).
- 证明了增强的自我恢复,抗结特性和裂传播抵抗.
- 通过使用开发的水凝,成功制造了应变传感器和 triboelectric 纳米发电机.
结论:
- 在高单体度下,液体-液体相分离是强大的纯Zwitterionic水凝的关键.
- 阶段分离和聚合物纠的协同效应改善了机械和功能性质.
- 开发的水凝显示了组织工程,软电子和可穿戴设备的巨大潜力.
相关概念视频
Intermolecular Forces
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Colloidal precipitates
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...
Ion Exchange
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 basic...
Theory of Strong Electrolytes
The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...


