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高分子电磁屏蔽材料的分类、作用原理
DT新材料· 2025-07-30 16:05
Core Viewpoint - The article discusses the increasing concern over electromagnetic radiation from electronic devices and the importance of electromagnetic shielding materials in protecting both human health and electronic systems from electromagnetic interference [1][3]. Group 1: Industry Overview - The Ministry of Industry and Information Technology reported that by the end of 2024, China will have 4.251 million 5G base stations, an increase of 874,000 from the previous year, with 5G base stations accounting for 33.6% of all mobile phone base stations, up 4.5 percentage points year-on-year [1]. - The development of electromagnetic shielding materials is crucial for the advancement of 5G communication and national defense technology [1]. Group 2: Types of Electromagnetic Shielding Materials - Conductive polymer composite materials can be categorized into several types, including: - Metal-filled conductive polymer composites, which enhance conductivity and electromagnetic shielding performance [6][7]. - Carbon-based conductive polymer composites, which are lightweight and have strong conductivity [9]. - Magnetic particle-filled conductive polymer composites, which utilize magnetic materials to enhance shielding effectiveness [10]. - Hybrid filler conductive polymer materials, which combine various fillers to optimize performance [11]. Group 3: Structural Optimization of Shielding Materials - Structural optimization techniques include: - Isolation-type conductive polymer composites that create a honeycomb network structure for better conductivity and shielding [13]. - Layered conductive polymer composites that enhance electromagnetic shielding through multiple interfaces [16]. - Porous conductive polymer composites that reduce weight while maintaining effective shielding performance [18][19]. Group 4: Advances in Conductive Polymer Shielding Materials - Intrinsic conductive polymer shielding materials are created through chemical or electrochemical doping, resulting in materials with low density, high corrosion resistance, and strong strength [23]. - The core of electromagnetic shielding materials is conductivity, with traditional metal shells being replaced by various conductive plastics and composites that offer better performance and lower costs [24][25]. Group 5: Future Trends and Developments - The demand for high-performance polymer-based electromagnetic shielding materials is increasing, driven by advancements in AI, 5.5G/6G, and other emerging technologies [28][29]. - The upcoming 2025 Polymer Industry Annual Conference will focus on the latest developments in electromagnetic composite materials and their applications [30][31].