Graphene/Thermoplastic composite materials for EMI shielding applications

NanoXplore是一家总部位于蒙特利尔的先进材料公司，是加拿大最大的石墨烯生产商，也是世界上最大的石墨烯生产商之一。NanoXplore计划扩大他们的材料在电磁干扰(EMI)应用中的用途。NanoXplore的目标是在8 GHz和更高的频率范围内应用。射频(RF)应用材料开发商面临的主要问题之一是材料的电磁特性。由于缺乏专业知识和设备，大多数公司将他们的测试建立在DC的表征上，而他们的材料开发则建立在试验和错误的基础上。对于用于高频应用的材料，直流测试提供的参数与高频时的实际参数相差甚远。试错法的概念既昂贵又耗时，不适合今天的高市场竞争力。这项建议旨在为汽车和航空航天应用中新开发的纳米复合材料提供合适的电磁特性。通过对几种石墨烯成分的电磁测量，我们应该预测每个样品的屏蔽效果，并建议达到所需屏蔽效果的合适的石墨烯成分比例。利用康科迪亚在微波实验室的设施，利用几个频段的波导(高频传输波导)测量了材料的反射和传输系数，称为S参数。这些测量结果被用来预测材料的电磁性能，从而预测材料的电磁屏蔽效能。还将使用几种测量装置来确定材料的各向异性。这个项目的结果将帮助NanXplore拥有一款新产品，并保持其作为一家加拿大公司在全球的领导地位。

NanoXplore is a Montreal-based advanced materials company, the largest Canadian producer of graphene andone of the largest graphene producers in the world. NanoXplore is planning to expand the use of their materialfor Electromagnetic Interference (EMI) applications. NanoXplore is targeting applications in the frequencyrange of 8 GHz and higher. One of the major problems that face material developer for Radio Frequency (RF)application is the proper electromagnetic characterization of the material. Most companies base their test onDC characterization due to lack of expertise and facilities and base their material development on trial anderror. For materials intended for high frequency application, DC tests provide parameters far from the actualparameters at high frequencies. Trial and error concept is costly and time consuming that is not appropriate fortoday's high market competitiveness. This proposal aimed at providing proper electromagnetic characteristicsfor the newly developed material by nanoXplore for shielding in automobiles, and aerospace application.Through the electromagnetic measurements of several graphene compositions, we should predict the shieldingeffectiveness of each sample and suggest the proper graphene composition ratio that achieves the requiredshielding effect.Using Concordia's facilities in the microwave laboratory, the material reflection and transmission coefficientsreferred to as S-parameters are measured using waveguides (high frequency transmission guide) of severalfrequency bands. These measurements are used in an inverse process to predict the electromagnetic propertiesof the material, which are used to predict the EMI shielding effectiveness of the material. Several measurementsetups will be used to determine the anisotropy of the material as well. The results of this project will helpnanoXplore to have a new product and maintain its leadership as a Canadian company all over the Globe.