可接,可再加工和耐水的聚佐氨酸玻璃体,通过动态胺基键交叉连接
Sujuan Zhang1, Jianjun Yi2, Jiming Chen2
1Key Laboratory for Special Functional Aggregated Materials of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China.
ChemSusChem
|March 4, 2024
概括
这项研究引入了一种具有动态 imine 键的新型聚糖玻璃化物 (C-ABZ),可进行再加工和回收. 这种先进的材料提供了可接性,耐水性和保留的热稳定性,解决了传统热的局限性.
科学领域:
- 聚合物科学 聚合物科学
- 材料化学 材料化学
背景情况:
- 传统的聚糖热遭受不可逆转的交叉连接,阻碍再加工和回收.
- 动态共价键为创建可回收和再处理的聚合物网络提供了一条途径.
研究的目的:
- 开发一种可接,可再加工和耐水的聚糖玻璃制剂.
- 调查动态 imine 键对材料可回收性和性能的影响.
主要方法:
- 通过凝结反应合成含有化物的化物寡合物 (O-ABZ) 和1,12-多德二胺的聚糖 (C-ABZ) 维他命聚合物.
- 通过热压循环评估接和再加工能力.
- 评估机械性能,包括拉伸强度和回收比率.
- 测试耐水性和热稳定性 (玻璃过渡温度).
主要成果:
- 合成的C-ABZ表现出成功的接和再加工,经过多个循环 (高达78.6%) 后,具有显著的抗拉强度恢复.
- 该材料表现出极好的耐水性,浸泡30天后体重增加<1%,并保持了拉伸强度.
- 经过三次热压循环后,玻璃过渡温度维持在150°C,这表明玻璃具有良好的热稳定性.
结论:
- 开发的聚糖玻璃化剂 (C-ABZ) 有效地克服了传统热的再加工局限性.
- 动态的伊胺键对于在聚糖网络中实现再处理性和可回收性至关重要.
- 对于先进的应用,C-ABZ具有机械,防水和热性能的有希望的平衡.
相关概念视频
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
2.6K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
2.6K
Olefin Metathesis Polymerization: Overview
2.1K
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...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.1K
Olefin 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


