随着无线通信技术的快速进步和电子设备数量的大幅增加,电磁干扰问题日益凸显,这对数据传输和设备性能产生了严重影响。因此,研究和开发高性能电磁波吸收材料显得尤为重要。纤维素因其资源丰富、环境友好、密度低等优点在高效吸波领域备受关注。纯纤维素材料由于其介电损耗低、电阻率高且无磁性,吸波能力较弱,不改性则难以直接应用。对改性纤维素的原理及性能进行综述,总结了研究人员通过添加磁性金属提高其磁性能,以及使用碳材料、导电聚合物提升其介电性能的3种改性方法。最后,结合相关综述探讨了改性纤维素吸波材料现阶段面临的挑战,并对下一阶段的发展进行展望。
The rapid advancement of wireless communication technology and the escalating number of electronic devices have exacerbated the issue of electromagnetic interference,significantly affecting data transmission and equipment performance.Consequently,the research and development of high-performance electromagnetic wave-absorbing materials are of paramount importance.Due to its abundant resources,environmental friendliness,and low density,cellulose has garnered significant attention for its potential in the field of high-efficiency wave absorption.The pure cellulose material,characterized by its low dielectric loss,high resistivity,and non-magnetic properties,exhibits weak wave-absorbing capabilities,making it challenging to apply directly without modification.This paper reviewed the principles and properties of modified cellulose,summarized three modification methods that researchers have used to enhance its magnetic properties by incorporating magnetic metals and its dielectric properties by employing carbon materials and conductive polymers.Lastly,based on relevant reviews,the challenges currently faced by modified cellulose wave-absorbing materials were discussed,and prospects for the next stage of development were outlined.
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基金资助
国家自然科学基金面上项目(32171708)
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