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基于聚二苯胺和钴铁颗粒在有无单壁碳纳米管情况下的新型混合电磁纳米材料的一步合成、表征及性能

One-step synthesis, characterization and properties of novel hybrid electromagnetic nanomaterials based on polydiphenylamine and Co-Fe particles in the absence and presence of single-walled carbon nanotubes.

作者信息

Ozkan Sveta Zhiraslanovna, Karpacheva Galina Petrovna, Efimov Mikhail Nikolaevich, Vasilev Andrey Aleksandrovich, Muratov Dmitriy Gennad'evich, Petrov Valeriy Alekseevich, Chernavskii Petr Aleksandrovich, Pankina Galina Viktorovna

机构信息

A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences 29 Leninsky Prospect Moscow 119991 Russia

Department of Chemistry, Lomonosov Moscow State University 1-3 Leninskie Gory Moscow 119991 Russia.

出版信息

RSC Adv. 2021 Jul 15;11(40):24772-24786. doi: 10.1039/d1ra03114g. eCollection 2021 Jul 13.

DOI:10.1039/d1ra03114g
PMID:35481017
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9036972/
Abstract

A one-step preparation method for hybrid electromagnetic nanomaterials based on polydiphenylamine (PDPA) and bimetallic Co-Fe particles in the absence and presence of single-walled carbon nanotubes (SWCNT) was proposed. During IR heating of PDPA in the presence of Co(ii) and Fe(iii) salts in an inert atmosphere at = 450-600 °C, the polycondensation of diphenylamine (DPA) oligomers and dehydrogenation of phenyleneamine units of the polymer with the formation of C[double bond, length as m-dash]N bonds and reduction of metals by evolved hydrogen with the formation of bimetallic Co-Fe particles dispersed in a polymer matrix occur simultaneously. When carbon nanotubes are introduced into the reaction system, a nanocomposite material is formed, in which bimetallic Co-Fe particles immobilized on SWCNT are distributed in the matrix of the polymer. According to XRD data, reflection peaks of bimetallic Co-Fe particles at diffraction scattering angles 2 = 69.04° and 106.5° correspond to a solid solution based on the fcc-Co crystal lattice. According to SEM and TEM data, a mixture of particles with sizes of 8-30 nm and 400-800 nm (Co-Fe/PDPA) and 23-50 nm and 400-1100 nm (Co-Fe/SWCNT/PDPA) is formed in the nanocomposites. The obtained multifunctional Co-Fe/PDPA and Co-Fe/SWCNT/PDPA nanomaterials demonstrate good thermal, electrical and magnetic properties. The saturation magnetization of the nanomaterials is = 14.99-31.32 emu g (Co-Fe/PDPA) and = 29.48-48.84 emu g (Co-Fe/SWCNT/PDPA). The electrical conductivity of the nanomaterials reaches 3.5 × 10 S cm (Co-Fe/PDPA) and 1.3 S cm (Co-Fe/SWCNT/PDPA). In an inert medium, at 1000 °C the residue is 71-77%.

摘要

提出了一种在有无单壁碳纳米管（SWCNT）存在的情况下，基于聚二苯胺（PDPA）和双金属Co-Fe颗粒制备混合电磁纳米材料的一步法。在惰性气氛中，于450-600°C对存在Co(ii)和Fe(iii)盐的PDPA进行红外加热时，二苯胺（DPA）低聚物的缩聚、聚合物亚苯基胺单元的脱氢形成C=N键以及金属被析出的氢还原形成分散在聚合物基质中的双金属Co-Fe颗粒这几个过程同时发生。当将碳纳米管引入反应体系时，会形成一种纳米复合材料，其中固定在SWCNT上的双金属Co-Fe颗粒分布在聚合物基质中。根据XRD数据，双金属Co-Fe颗粒在衍射散射角2θ = 69.04°和106.5°处的反射峰对应于基于面心立方Co晶格的固溶体。根据SEM和TEM数据，在纳米复合材料中形成了尺寸为8-30 nm和400-800 nm（Co-Fe/PDPA）以及23-50 nm和400-1100 nm（Co-Fe/SWCNT/PDPA）的颗粒混合物。所获得的多功能Co-Fe/PDPA和Co-Fe/SWCNT/PDPA纳米材料表现出良好的热、电和磁性能。纳米材料的饱和磁化强度为Ms = 14.99-31.32 emu g（Co-Fe/PDPA）和Ms = 29.48-48.84 emu g（Co-Fe/SWCNT/PDPA）。纳米材料的电导率达到3.5×10 S cm（Co-Fe/PDPA）和1.3 S cm（Co-Fe/SWCNT/PDPA）。在惰性介质中，1000°C时的残留率为71-77%。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0447/9036972/3d77bc3c5c45/d1ra03114g-f10.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0447/9036972/ba113c807644/d1ra03114g-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0447/9036972/bd824a724ddd/d1ra03114g-f5.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0447/9036972/c757894eb79c/d1ra03114g-f9.jpg
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