作为适应pH响应的聚合物的调布伦斯特德基性单体,烯-胺醇
Zahra Sekhavat Pour1, Ali Alshaikh1, Grace K Thompson1
1Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States.
Langmuir : the ACS journal of surfaces and colloids
|December 2, 2025
概括
新的 styrene-imidazole (Sty-Im) 聚合物显示可调节的pH响应性胀. 这些布伦斯特德基聚合物对于需要水不溶性,pH敏感材料的应用具有前景.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 超分子化学 超分子化学
背景情况:
- styrene-imidazole (Sty-Im) 图案是基于离子液体 (IL) 的材料的多功能构建模块.
- 应用包括离子交换膜,气体分离和催化.
- 斯蒂-伊姆单体的直接聚合和pH响应性行为仍未得到充分研究.
研究的目的:
- 从Sty-Im单体中合成和表征新的布伦斯特德基聚合物.
- 为了研究这些聚合物的pH响应性胀行为.
- 探索Sty-Im聚合物的可调性,用于特定的应用.
主要方法:
- 一个阶段合成的1-乙烯基-胺醇 (Sty-Im) 和1-乙烯基-2-甲基胺醇 (Sty-2-Me-Im) 单体.
- 在PTFE模具中大量聚合单体以形成圆盘形样本.
- 在酸性环境 (HCl,酸) 中测试不同pH值的pH响应性胀.
主要成果:
- 聚-Sty-Im和聚-Sty-2-Me-Im都表现出对pH反应的胀,在较低的pH值下由于伊米达质子化而增加.
- 聚乙烯 (Sty-2-Me-Im) 的胀明显高于聚乙烯 (Sty-Im).
- 胀因酸类型和反而有所不同,在等值pH值下,酸的胀大于HCl.
结论:
- 该Sty-Im图案提供了一个可调节的平台,用于创建不溶于水的,对pH值敏感的聚合物.
- 这些材料显示出对pH值变化敏感的应用的潜力.
- 观察到的胀行为受酸类型和对抗离子相互作用的影响.
更多相关视频
相关概念视频
Polymer Classification: Stereospecificity
3.1K
Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
3.1K
Anionic Chain-Growth Polymerization: Overview
2.5K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.5K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
2.2K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
2.2K
Olefin Metathesis Polymerization: Overview
2.5K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
2.5K
Step-Growth Polymerization: Overview
4.3K
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Many natural and synthetic polymers are produced by...
4.3K
Polymer Classification: Architecture
3.7K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
3.7K


