双相GaIn合金在聚合物复合材料中构建了超宽温度区域的稳定透网络
Xinfeng Zhou1, Yue Liu1, Zijie Gao1
1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
Advanced materials (Deerfield Beach, Fla.)
|January 7, 2024
概括
这项研究引入了一种使用-合金的新型聚合物复合物,以保持稳定的电导率和在极端温度 (77-473 K) 中电磁干扰屏蔽. 自适应合金网络修复结构损坏,确保在具有挑战性的环境中提供高性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术纳米技术
背景情况:
- 聚合物复合材料面临性能退化,由于不同的填充剂-矩阵行为导致的热冲击.
- 在广泛的温度范围内开发具有可靠性能的材料对于先进的应用至关重要.
研究的目的:
- 设计一种自我适应的聚合物复合材料,具有稳定的导电网络,能够抵御极端温度变化 (77-473 K).
- 研究双相-合金在热应力下保持复合材料完整性和功能方面的作用.
主要方法:
- 在现场微型计算机断层扫描 (micro-CT) 观察合金相变和网络修复机制.
- 聚合物复合材料的制造,其中包括双相Ga35In65合金.
- 测试电导率,电磁干扰 (EMI) 屏蔽和显著温度冲击后的热稳定性 (ΔT = 396 K).
主要成果:
- 该Ga35In65合金表现出符合相变的相变,使导电网络能够自我修复.
- 冷膨胀在低温下弥补网络中断;在高温下,融和填补空白.
- 复合材料表现出强大的导电性和EMI屏蔽,在经历大温度冲击后保持稳定性.
结论:
- 在聚合物复合材料中成功展示了一种创建温度自适应导电网络的新策略.
- 开发的复合材料具有特殊的热稳定性和可靠性,适用于极端温度应用.
- 这些发现激发了对高性能聚合物复合材料的增材制造,以适应苛刻的环境.
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