超低的热膨胀系数和高无色透明聚胺薄膜通过在无色聚胺中进行芳香聚胺的现场聚合,通过加强的键网络实现
Xueshuang Jiang1, Kaijin Chen1, Chuying Li1
1PCFM Lab, GD HPPC Lab, Guangdong Engineering Technology Research Centre for High-Performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-sen University, Guangzhou510275, China.
ACS applied materials & interfaces
|August 24, 2023
概括
无色聚胺 (CPI) 通过现场聚合增强了芳香聚胺 (PA),创造了强大的复合材料. 这些新的CPI-PA复合材料为先进的柔性显示应用提供了改进的热和机械性能.
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:
- 无色聚胺 (CPI) 是柔性OLED显示器的关键基材.
- 提高CPI的机械和热性能对于更广泛的应用是必不可少的.
- 现有的CPI材料面临着当前灵活显示技术的局限性.
研究的目的:
- 在CPI中增强芳香聚胺 (PA) 的分散和界面相互作用.
- 开发具有改进性能的新型无色透明宏分子聚胺复合材料 (CPI-PA).
- 研究合成的CPI-PA材料的结构-属性关系.
主要方法:
- 在无色聚胺 (CPI) 基质中,芳香聚胺 (PA) 的现场聚合.
- 通过调整PA与CPI的比率来合成CPI-PA复合物.
- 分子模拟以确认PA分布和聚合物相互作用.
- 复合材料的热,机械和光学性能的表征.
主要成果:
- 在CPI中显著改善了PA的分散和界面相互作用.
- 成功制备了CPI-PA复合材料,具有出色的薄膜形成特性.
- 分子模拟证实了均的PA分布和键网络的形成.
- CPI-PA显示了高的热分解温度 (499°C) 和玻璃过渡温度 (385°C).
- 复合材料表现出优异的机械性能:拉伸强度为50.9MPa,弹性模量为3.9GPa.
- 在可见区域,CPI-PA保持了高光学透明度,可见区域的传输率为90%.
结论:
- 在现场聚合是一种有效的策略,可以创建高性能CPI-PA复合材料.
- 开发的CPI-PA材料克服了传统CPI的局限性,提供灵活的应用.
- 键网络和链纠有助于增强热和机械稳定性.
- 这种设计策略为开发先进的聚合物复合材料提供了一种通用方法.
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