(沈陽理工大學 材料科學與工程學院，沈陽 110168)
摘 要: 以纖維素為炭前軀體，硝酸鎳為金屬源，采用還原炭化法制備出碳包覆Ni納米顆粒(Ni@C)。進一步采用原位聚合法合成出Ni@C/聚苯胺(PANI)復合材料。TEM分析表明：Ni@C粒度分布均勻，呈核殼結(jié)構(gòu)。采用IR光譜、SEM、XRD對復合材料和形態(tài)和結(jié)構(gòu)進行分析；考察了Ni@C的含量對Ni@C/PANI復合材料電導率的影響。采用波導法在8.2~12.4 GHz波段范圍對Ni@C和Ni@C/PANI復合材料進行電磁參數(shù)進行測試分析，復合材料的電損耗角正切值可達到0.65，磁損耗角正切值可達0.15，所制備Ni@C/PANI具有較高的電磁損耗角正切值，結(jié)果表明其吸波性能較好。
關(guān)鍵字: 碳包覆Ni納米顆粒；聚苯胺；原位聚合；電磁性能
（School of Material Science and Engineering，Shengyang Ligong Univeristy，Shenyang 110168，China）
Abstract:Carbon encapsulated Ni nanoparticles (Ni@C) were successfully prepared by inducing carbonization of cellulose/nickel composite in flowing hygrogen, in which cellulose is used as carbon precursor and Ni(NO3)2 is used as metal source. The as-prepared Ni@C have core-shell structure with uniform size distribution characterized by TEM. The Ni@C/polyaniline (PANI) composites were synthesized by in situ polymerization with different contents of Ni@C. The morphology and structure of composites were characterized by IR spectrum, SEM and XRD. Meanwhile, the effect of the content of Ni@C on the conductivity of composite was studied in detail. Furthermore, the complex permittivity and permeability of the as-prepared composites were characterized in the frequency range of 8.2-12.4 GHz by the wave-guide method on the vector network analyzer, in which the higher tangent values of electrical and magnetic loss of the Ni@C/PANI composites were 0.65 and 0.15, respectively.
Key words: carbon encapsulated Ni nanoparticle; polyaniline; in-situ polymerization; electromagnetism property
