设计施工的星状水凝复合材料的自愈电磁干扰屏蔽
Hao Zheng1,2, Jie Zhang3, Xiao Li1,2
1School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
ACS applied materials & interfaces
|September 29, 2025
概括
一种新型的自我愈合的磁性复合水凝提供了卓越的电磁干扰 (EMI) 屏蔽. 这种先进的材料结合了微球,为现代电子设备提供了耐用和高效的屏蔽.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 聚合物化学 聚合物化学
背景情况:
- 现代电子产品需要轻量级,耐用的电磁干扰 (EMI) 屏蔽材料.
- 传统的金属屏蔽材料密集,易受损坏,并且难以加工.
- 需要具有自我愈合特性的先进材料来提高寿命.
研究的目的:
- 制造一种具有卓越的EMI屏蔽性能的自愈磁性复合液凝.
- 调查开发的复合材料的自我愈合能力和EMI屏蔽效果.
- 探索这种材料在柔性电子和航空航天应用中的潜力.
主要方法:
- 将星酸微球 (SMS) 纳入聚乙醇 (PVA) 水凝矩阵中.
- 使用四酸盐交叉连接PVA水凝,以创建动态的酸盐结.
- 在X波段和Ka波段的频率中,复合液凝的自我愈合效率和EMI屏蔽效率 (SET) 的表征.
主要成果:
- 复合水凝在环境温度下表现出快速的自我愈合,达到92%的效率.
- 在7重%的Ni SMS负载下,该材料在X频段实现了61.5dB的总屏蔽效率 (SET),并在固化后保留了56.3dB.
- 在Ka频段观察到超过120dB的显著SET,证明了宽频屏蔽能力.
结论:
- 开发的自愈磁性复合液凝为先进的EMI屏蔽提供了有前途的解决方案.
- SMS的协同效应通过优化导电性,界面极化和磁性损失来增强屏蔽.
- 本材料介绍了设计灵活电子,航空航天和可穿戴设备的智能EMI屏蔽的新策略.
相关概念视频
Composite Masonry Walls
Composite masonry walls combine multiple wythes of the same or different masonry materials to create a unified structure. These walls feature wythes that are bonded together either through mortar-filled collar joints, grouted spaces, or more commonly, with rigid metal ties and reinforcements, with the use of masonry header units being rare. Metal ties are preferred because they effectively minimize water penetration, as these walls primarily absorb moisture and then release it into the...
Masonry Curtain Walls
Masonry curtain walls employ brick or stone veneers supported by the building's structure to form an external cladding system that is both aesthetically appealing and functional. These walls are erected through two principal techniques, first by traditional layering of masonry units and second by using prefabricated panels. Traditional construction relies on steel shelf angles attached to the spandrel beam for support, with high-bond mortars ensuring secure attachment of masonry veneer units.
Posttensioned Masonry Walls
Post-tensioned masonry walls use high-strength steel rods or flexible tendons to enhance the strength and efficiency of masonry structures. These elements are securely anchored to the foundation and extend vertically either within the cores of the masonry units or between the masonry wythes. The construction process involves building the wall with these tensioning elements in place and allowing the mortar to fully cure.
Following the curing process, the tensioning begins. Steel rods are...
Masonry in Cold and Hot Weather Conditions
In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
Other key practices include keeping masonry units and sand dry and...
Other key practices include keeping masonry units and sand dry and...
Ferrocement
Ferro-cement is a distinctive construction material that represents an innovative variant of reinforced concrete, characterized by its unique composition and the method by which it is formed. Unlike standard reinforced concrete, which relies on larger steel bars for reinforcement, ferro-cement utilizes densely packed layers of mesh or fine rods, fully encased in cement mortar. This composition allows for the creation of structures that are significantly thinner and more flexible than their...
Waterproofing and Anti-Bacterial Admixtures in Concrete
Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
Waterproofing admixtures render concrete hydrophobic,...


