분산제에 따른 자성금속 무전해도금 기반 그래핀 분산 특성 및복합재의 전자파 차폐 특성 연구
Dispersion Characteristics of Magnetic Particle/Graphene Hybrid Based on Dispersant and Electromagnetic Interference Shielding Characteristics of Composites
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초록
본 논문에서는 그래핀 표면에 무전해 도금을 통해 FeCoNi 자성 나노입자를 환원 성장시킨 후 이를 다양한 계면 활성제로 분산시켜 고분자 복합필름을 제조하였다. Pyridine 계면 활성제로 분산 시킨 후 제조한 복합필름은 가장 높은 분산성과 낮은 표면저항 값(351 Ohm/sq) 및 10 GHz 주파수에서 90% 이상의 전자파 차폐 능력을보였다. 특히, 건조과정에서 pyridine의 증발은 내부 전도체 네트워크 형성과 분산성이 높은 필름 형성을 형성 할수 있는 것으로 확인되었다.
Abstract
In this paper, magnetic FeCoNi particles have been grown through electroless plating on the surface of graphene, and then this hybrid material has been dispersed by various surfactants to prepare films. The pyridine surfactant shows the highest dispersability and low surface resistance value (351 Ohm/sq) and the electromagnetic shielding ability at the frequency of 10 GHz. Specially, the evaporation of the pyridine during the drying process could be able to form the internal conductive network and high dispersion of FeCoNi on the surface of graphene.
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