一维磁性铜基核壳纳米材料的表面-界面调控、导热-吸波协同增强机制与性能

针对当前导热吸波材料的导热和吸波性能相互牵制，难以满足5G器件对散热和电磁防护的高要求，本项目拟通过一维磁性铜基核壳纳米材料组成、结构、表面与界面的设计和调控来实现导热-吸波协同增强及导热吸波一体化材料体系。这是考虑到：一维(1D)金属-介质核壳结构、草莓状表面能产生强的等离子体共振增强电磁和微波吸收；控制材料表面-界面的形貌与组成可调节电磁参数，改善导热、匹配、吸收和耐电压性能；高热导率的金属和1D结构形成的导热网络能提高其导热性能。为此，开发两种合成1D核壳纳米材料的制备方法及表面-界面的调控技术；探明1D核壳纳米材料的表面-界面对热导率、电磁参数、微波吸收的影响规律；获得性能优异的1D磁性铜基核壳纳米材料；揭示导热-吸波协同增强机制；从而为进一步设计和制备“导热-吸波协同增强”的导热吸波一体化材料提供理论支撑。申请者丰富的研究积累和前期探索性研究为本项目的顺利完成提供了扎实的基础。

In view of the key scientific issue that the current heat-conducting and microwave-absorbing materials with mutually restrained properties are difficult to meet the high requirement of 5G communication electronic and electrical equipment for heat dissipation and electromagnetic protection, the design and regulation of the composition, structure, surface and interface of one-dimensional (1D) magnetic copper-based core-shell nano-materials (CSNMs) are proposed to realize the thermal conductivity-absorption synergistic enhancement and thermal conductivity-microwave absorption integrated material system. It is based on the following reasons: The 1D metal-dielectric core-shell structure and strawberry-shaped surface of nanomaterials can generate strong plasmon resonance that contributes to electromagnetic and microwave-absorbing enhancement; The morphology and composition of the surface-interface of 1D CSNMs can be controlled to adjust the electromagnetic parameters, improve the thermal conductivity and matching characteristics, and enhance the microwave-absorbing and voltage-resistant performance; The metals (Cu, Fe and Ni) with high heat conductivity and the heat-conducting network formed by 1D structure can improve its heat-conducting performance. In this project, we are going to (1) develop two preparation methods and a surface-interface regulation technique of Cu-based 1D CSNMs, (2) reveal the effects of the surface-interface morphology and composition of 1D CSNMs on thermal conductivity, electromagnetic parameters and microwave absorption, (3) produce superior 1D magnetic Cu-based CSNMs, (4) and elucidate the mechanisms of plasmon-enhanced electromagnetism and heat-conducting microwave-absorbing synergetic enhancement, thus providing theoretical support for the further design and preparation of heat-conducting and microwave-absorbing materials with a synergetic enhancement of heat conduction and microwave absorption. Additionally, the applicant possesses abundant research accumulation and preliminary exploratory research, which provides a solid foundation for the successful completion of the project.