CAJ | 학술논문

以纤维素为炭前躯体,硝酸镍为金属源,采用还原炭化法制备出碳包覆Ni纳米颗粒(Ni@C).进一步采用原位聚合法合成出Ni@C/聚苯胺(PANI)复合材料.TEM分析表明:Ni@C粒度分布均匀,呈核壳结构.采用IR光谱、SEM、XRD对复合材料和形态和结构进行分析;考察了Ni@C的含量对Ni@C/PANI复合材料电导率的影响.采用波导法在8.2~12.4 GHz波段范围对Ni@C和Ni@C/PANI复合材料进行电磁参数进行测试分析,复合材料的电损耗角正切值可达到0.65,磁损耗角正切值可达0.15,所制备Ni@C/PANI具有较高的电磁损耗角正切值,结果表明其吸波性能较好.
이섬유소위탄전구체,초산얼위금속원,채용환원탄화법제비출탄포복Ni납미과립(Ni@C).진일보채용원위취합법합성출Ni@C/취분알(PANI)복합재료.TEM분석표명:Ni@C립도분포균균,정핵각결구.채용IR광보、SEM、XRD대복합재료화형태화결구진행분석;고찰료Ni@C적함량대Ni@C/PANI복합재료전도솔적영향.채용파도법재8.2~12.4 GHz파단범위대Ni@C화Ni@C/PANI복합재료진행전자삼수진행측시분석,복합재료적전손모각정절치가체도0.65,자손모각정절치가체0.15,소제비Ni@C/PANI구유교고적전자손모각정절치,결과표명기흡파성능교호.
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.