通过分子结构设计和金属离子结合,构建自我愈合的聚二甲基西洛
Lvchao Qiu1, Yutong Zhou1, Zhoufeng Zhao1
1State Grid Zhejiang Electric Power Co., Ltd., Research Institute, Hangzhou 310014, China.
Polymers
|May 25, 2024
概括
这项研究开发了一种使用功能化聚甲基 (PDMS) 和欧离子 (Eu3+) 的自我愈合弹性体. 由此产生的材料具有很高的机械强度,优异的气体屏障性能和接近100%的自我愈合效率.
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
- 纳米技术 纳米技术
背景情况:
- 自愈聚合物,特别是聚二甲基 (PDMS),在先进的应用中越来越重要.
- 开发具有增强机械性能和自我愈合能力的PDMS仍然是一个关键的研究目标.
研究的目的:
- 合成一种基于功能化PDMS的新型自我愈合弹性体,其中包含稀土欧离子 (Eu3+).
- 调查 Eu3+ 协调对 PDMS 矩阵的机械强度,自愈效率和气体屏障性能的影响.
主要方法:
- 通过使用2,6-pyridinedicarbonyl 化物与二氨基的PDMS的功能化,以创建pyridine-PDMS (Py-PDMS).
- 将欧离子 (Eu3+) 纳入Py-PDMS矩阵,形成一个协调交叉连接的网络,产生Eu3+-Py-PDMS弹性体.
- 机械性能 (抗拉强度,断裂延长),在不同温度下自愈效率和气体屏障性能的表征.
主要成果:
- 用1:1的Eu3+与连接体骨比率制造的Eu3+-Py-PDMS弹性体实现了1.4MPa的抗拉强度和824%的断裂延伸.
- 该材料表现出了显著的自我修复能力,在60°C的4小时修复后,在使用1:2的金属-合金骨比率时,达到近100%的效率.
- 与对照组相比,在Eu3+-Py-PDMS中观察到更好的气体屏障特性.
结论:
- 一种新的Eu3+-Py-PDMS弹性体成功合成,展示了一个强大的协调交叉链接网络.
- 开发的材料提供了高机械强度,卓越的自我愈合效率和增强的气体屏障性能的有希望的组合.
- 这项工作为设计基于PDMS的先进材料提供了一种有效的策略,用于各种技术应用.
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