SBIR Phase I: Improvement of Low Frequency Response of Carbon Nanomembrane for EMI Shielding

SBIR 第一阶段：改善 EMI 屏蔽用碳纳米膜的低频响应

• 批准号: 1014181
• 负责人: Jessica Ravine
• 金额: $ 14.96万
• 依托单位: NanoTechLabs Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1014181&HistoricalAwards=false
• 关键词: SBIR; Phase; Improvement; Low; Frequency

This Small Business Innovation Research Phase I project will employ innovative alloy nanowire manufacturing concepts to enhance the low frequency response of carbon nanomembrane for electromagnetic interference (EMI) shielding of cabling and electronics. Currently-employed metals present corrosion and thermal expansion mismatch concerns when bonded with composites. Shielding with carbon nanomembrane will address these materials problems and offers the added advantage of lower weight. Shielding with carbon nanomembrane has been demonstrated to be as effective as with aluminum at higher frequencies, but not at the low frequency range. This project will address this deficiency by incorporating permeable amorphous alloy nanowires into the carbon nanomembrane to enhance reflectivity, the primary shielding mechanism at low frequencies. Two approaches to amorphous alloy nanowire production will be explored. Dispersion and loading optimization studies will be performed to incorporate the nanowires into carbon nanomembrane as a minor constituent. Changes in existing membrane properties, infusibility and cure cycles will be explored to identify potential side effects of including the alloy nanowires. The goal is to demonstrate EMI shielding effectiveness comparable to aluminum at frequencies of 1GHz and lower.The broader/commercial impact of this project, if successful, is the availability of non-metal EMI shielding materials that will have the same effectiveness as metal shielding. As designs for electronics enclosures and other structural components transition to composite materials to save weight, coatings must be employed to protect electronics from electromagnetic interference due to environmental effects, proximity to other electronics, or electromagnetic weapon attack. Carbon nanomembrane presents many advantages over metal coatings for EMI shielding of composites, including weight savings, manufacturing efficiency improvements, and compatibility with composite materials and processing techniques. Improving the low frequency response of carbon nanomembrane will enable a wider adoption for this material in EMI shielding applications for electronics and cabling.

这个小型企业创新研究第一阶段项目将采用创新的合金纳米线制造概念，以增强碳纳米膜的低频响应，用于电缆和电子产品的电磁干扰（EMI）屏蔽。 目前使用的金属与复合材料结合时存在腐蚀和热膨胀不匹配的问题。 用碳纳米膜屏蔽将解决这些材料的问题，并提供更轻的额外优势。 碳纳米膜屏蔽已被证明在较高频率下与铝一样有效，但在低频范围内则不然。 该项目将通过将可渗透的非晶合金纳米线纳入碳纳米膜以增强反射率来解决这一缺陷，这是低频下的主要屏蔽机制。 两种方法来生产非晶合金纳米线将被探索。 将进行分散和装载优化研究以将纳米线作为次要成分并入碳纳米膜中。 将探索现有膜性质、不熔性和固化周期的变化，以确定包括合金纳米线的潜在副作用。 目标是在1GHz及以下的频率下展示与铝相当的EMI屏蔽效果。如果成功，该项目的更广泛/商业影响将是非金属EMI屏蔽材料的可用性，这些材料将具有与金属屏蔽相同的效果。 随着电子设备外壳和其他结构部件的设计过渡到复合材料以减轻重量，必须采用涂层来保护电子设备免受由于环境影响、与其他电子设备的接近或电磁武器攻击而引起的电磁干扰。 与金属涂层相比，碳纳米膜在复合材料的EMI屏蔽方面具有许多优势，包括重量减轻，制造效率提高以及与复合材料和加工技术的兼容性。 改善碳纳米膜的低频响应将使这种材料在电子和电缆的EMI屏蔽应用中得到更广泛的采用。