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用导电的Ag取代氧化外:为高度伸展的电子产品,电磁屏蔽和热接口提供可打印和可回收复合材料
Abdollah Hajalilou1, Elahe Parvini1, Tiago A Morgado2
1Institute of Systems and Robotics, Department of Electrical Engineering, University of Coimbra, Coimbra 3030-290, Portugal.
ACS applied materials & interfaces
|October 29, 2024
概括
这项研究开发了一种用于软电子的新型银涂液体金属复合材料. 增强的导电性和电机性能为可穿戴设备提供了卓越的EMI屏蔽和热管理.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 软电子是软电子的产品之一.
背景情况:
- 由于高导电性,液体金属 (LM) 复合材料对软电子有希望.
- 在LM液滴上的氧化物层 (α-Ga2O3和GaOOH) 阻碍了性能.
- 在基于LM的材料中需要提高导电性和稳定性.
研究的目的:
- 为了提高基于LM的复合材料的导电性和电机性能.
- 开发用于软电子应用的可数字打印复合材料.
- 为了实现高电磁干扰 (EMI) 屏蔽效率.
主要方法:
- 超声波辅助的替代反应用银 (Ag) 覆盖LM纳米粒子.
- 从Ag涂层纳米粒子中形成多孔微粒.
- 混合与 styrene-isoprene-styrene (SIS) 聚合物进行可打印的复合材料.
- 电导率,机电性质和EMI屏蔽的表征.
主要成果:
- Ag涂层的LM纳米粒子形成了聚合的,多孔的微粒.
- 由此产生的复合材料表现出优越的导电性和电机性能.
- 在X频段实现了超过75dB的EMI屏蔽效率 (SE),即使在200%的张力下也是如此.
- 作为热接口材料 (TIM) 的证明适用性.
结论:
- Ag涂层LM复合材料为可伸缩电子和EMI屏蔽提供了显著的进步.
- 该材料符合EMI屏蔽的严格军事和医疗标准.
- 使用可生物降解溶剂的可回收性突出了其对生物电子应用的环保潜力.
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