混合纳米复合材料 基于聚-3,6-二二-2,5-二-1,4-基):合成,结构和特性
Svetlana G Kiseleva1, Galina N Bondarenko1, Andrey V Orlov1
1A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky pr., 29, 119991 Moscow, Russia.
Polymers
|July 13, 2024
概括
这项研究引入了新型的混合纳米复合物,包括聚-3,6-二-2,5-二-1,4-基和石墨烯氧化物. 制备方法显著影响它们的结构和电特性,所有这些都显示出增强的热稳定性.
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:
- 开发先进的混合纳米复合材料对于新型材料应用至关重要.
- 聚-3,6-二二-2,5-二-1,4-基 (PDACB) 和石墨烯氧化物 (GO) 是功能复合材料的有希望的材料.
- 了解合成对纳米复合材料性能的影响,是材料设计的关键.
研究的目的:
- 首次合成和描述PDACB和GO的新型混合纳米复合材料.
- 研究不同制备方法对纳米复合材料的组成,结构和功能性质的影响.
- 探索这些混合材料中的分子间相互作用和导电机制.
主要方法:
- 使用了三种不同的制备方法:超声波混合,现场氧化聚合和溶剂蒸发.
- 描述包括分析成分,化学结构,形态,热稳定性和电气性能.
- 测量了直流 (dc) 导电性,以了解电荷传输机制.
主要成果:
- 超声波混合导致PDACB和GO之间产生强烈的分子间相互作用 (H键,π堆积,静电).
- 在现场聚合导致GO参与氧化和PDACB膜在GO上的形成.
- 加热导致PDACB的脱和GO的减少,影响导电性.
- 与原始的PDACB相比,所有合成的纳米复合材料都表现出增强的热稳定性.
- 一个跳跃机制控制了导电性,直流导电性值根据制备变化两个数量级.
结论:
- 制备方法批判性地决定了PDACB-GO混合纳米复合材料的结构,相互作用和特性.
- 所有方法都产生了具有更好的热稳定性的纳米复合材料.
- 观察到的导电率变化凸显了这些材料在特定应用中的可调性.
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