SBIR Phase I: Liquid Metal-Elastomer Composite for Electromagnetic Shielding

SBIR 第一阶段：用于电磁屏蔽的液态金属弹性体复合材料

• 批准号: 2035711
• 负责人: Navid Kazem
• 金额: $ 25.6万
• 依托单位: Arieca Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-02-01 至 2022-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2035711&HistoricalAwards=false
• 关键词: SBIR; Phase; Liquid; Metal; Elastomer

The broader impact/commercial potential of this Small Business Innovation Research (SBIR) Phase I project is to provide new methods and materials to improve electromagnetic interference (EMI) and radio frequency (RF) shielding. EMI/RF shielding are critical for protecting electronic devices from electromagnetic disruption, interference, or data theft. The uninterrupted operation of these electronic devices is essential in a wide range of existing and emerging products and applications, from mobile technologies and personal computing to internet of things, smart textiles, and wearable electronics. However, poor mechanical contact and issues with reliable sealing are critical pain points for EMI/RF shielding applications related to these applications. Improved performance depends on materials that are highly deformable and can maintain a low "lack of conformity" between mating surfaces, an acute challenge that has driven commercial demand for softer and more deformable EMI/RF shielding materials. This project will advance the development of a new material. This Small Business Innovation Research (SBIR) Phase I project will develop a materials technology that combines high performance electromagnetic interference (EMI) with extreme elasticity, mechanical compliance, and toughness. This technology is based on a liquid metal embedded elastomer (LMEE) architecture in which droplets of liquid metal are suspended within a soft elastomer matrix. These composites have a unique combination of properties not possible with other elastomers: (i) high electrical conductivity, (ii) high strain limit, (iii) low elastic modulus, and (iv) high fracture toughness. Because of its high electrical conductivity, LMEEs are effective in disrupting electromagnetic waves and RF signals. Furthermore, because of its high elasticity and tear resistance, LMEE can be used for EMI shielding within tubing, hoses, seals, gaskets, and rubber-based packaging as well as in bags, clothing, and other textiles. This project will result in an LMEE composite with adequate conductivity to shield electronic devices from interference over a wide range of frequencies. Moreover, it will be mechanically robust and resistance to the leakage of liquid metal when torn or punctured.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项小型企业创新研究（SBIR）I期项目的更广泛的影响/商业潜力是提供新的方法和材料，以改善电磁干扰（EMI）和射频（RF）屏蔽。 EMI/RF屏蔽对于保护电子设备免受电磁破坏，干扰或数据盗窃至关重要。 这些电子设备的不间断操作在广泛的现有和新兴产品和应用中至关重要，从移动技术和个人计算到物联网，智能纺织品和可穿戴电子产品。 但是，机械接触差和可靠密封的问题是与这些应用相关的EMI/RF屏蔽应用的关键疼痛点。 改进的性能取决于高度变形的材料，并且在交配表面之间保持低“缺乏顺从性”，这是一种急性挑战，它促使商业需求较软，并且更可变形的EMI/RF屏蔽材料。该项目将推动开发新材料。这项小型企业创新研究（SBIR）I阶段项目将开发一种材料技术，将高性能电磁干扰（EMI）与极端弹性，机械合规性和韧性相结合。 该技术基于液态金属嵌入式弹性体（LMEE）结构，在该体系结构中，液态金属液滴悬浮在软弹性体基质中。这些复合材料与其他弹性体不可能具有独特的特性组合：（i）高电导率，（ii）高应变极限，（iii）低弹性模量和（iv）高断裂韧性。由于其高电导率，LMEE可有效破坏电磁波和RF信号。 此外，由于其高弹性和抗泪性，LMEE可用于管道内的EMI屏蔽，软管，密封件，垫圈和基于橡胶的包装以及袋子，衣服和其他纺织品。 该项目将导致LMEE复合材料具有足够的电导率，以使电子设备免受多种频率的干扰。 此外，当被撕裂或刺破时，它将在机械上具有强大的液体金属泄漏性。该奖项反映了NSF的法定任务，并且使用基金会的知识分子优点和更广泛的影响审查标准，被认为是值得通过评估来支持的。