对具有优良综合性能的AEMs的研究,由与SEBS共价交叉链接的p-Triphenyl准备的远程移植的Piperidine离子
Fanghui Wang1, Zhaonan Sun2, Hanfei Zhang1
1State Key Laboratory of Chemical Resource Engineering, Institute of Modern Catalysis, Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
ACS applied materials & interfaces
|February 1, 2024
概括
结合SEBS,p-triphenyl和PIP的新型离子交换膜 (AEM) 为电化学应用提供了增强的机械强度,离子导电性和性稳定性.
科学领域:
- 聚合物科学 聚合物科学
- 材料化学 材料化学
- 电化学 电化学 电化学
背景情况:
- 阳离子交换膜 (AEM) 对性燃料电池和其他电化学设备至关重要.
- 开发具有高机械和化学稳定性的AEM,以及高效的离子传输,仍然是一个关键的挑战.
- 现有的AEM通常在恶劣的性环境中长期耐用性较差.
研究的目的:
- 为了合成和描述一系列新的SEBS-C6-PIP-yPTP离子交换膜 (AEM).
- 为了研究将p-triphenyl (PTP) 含量纳入膜特性的影响.
- 在机械强度,离子导电性和性稳定性方面评估这些AEM的性能.
主要方法:
- 合成具有不同PTP含量的SEBS-C6-PIP-yPTP膜 (y = 0-15%).
- 膜形态的表征,机械性能 (抗拉强度,破裂时的延长),离子导电性和性稳定性.
- 分析结构与属性关系,重点关注阶段分离和交联效应.
主要成果:
- 引入PTP创造了明显的水友性-性相分离,增强了离子运输通道.
- 有机-有机共价交联将链状结构转化为网络状结构,提高拉伸强度.
- SEBS-C6-PIP-15%PTP膜表现出卓越的性能:38.79 MPa的抗拉强度,183.09%的破裂延伸,102.02 mS cm−1的离子导电性,在80°C的1400小时后,在2M NaOH中只有6.23%的降解.
结论:
- 有机-有机共价交叉链接是提高AEM综合性能的有效策略.
- 开发的SEBS-C6-PIP-yPTP膜显示出在性介质中需要高稳定性和导电性应用的巨大潜力.
- 在SEBS强度,PTP刚性和PIP稳定的协同作用组合下,可以实现高性能的AEM.
相关概念视频
00:53Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
1.9K
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...
1.9K
01:17Thermal Electrocyclic Reactions: Stereochemistry
2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K