Polypyrrole-interface-functionalized nano-magnetite epoxy nanocomposites as electromagnetic wave absorbers with enhanced flame retardancy

被引：266

作者：

Guo, Jiang ^{[1
,2
]}

Song, Haixiang ^{[2
]}

Liu, Hu ^{[2
]}

Luo, Chunjia ^{[3
]}

Ren, Yanrong ^{[1
]}

Ding, Tao ^{[1
]}

Khan, Mojammel A. ^{[4
]}

Young, David P. ^{[4
]}

Liu, Xinyu ^{[5
]}

Zhang, Xin ^{[6
]}

Kong, Jie ^{[3
]}

Guo, Zhanhu ^{[2
]}

机构：

[1] Henan Univ, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China

[2] Univ Tennessee, Dept Chem & Biomol Engn, ICL, Knoxville, TN 37996 USA

[3] Northwestern Polytech Univ, Sch Sci, Shaanxi Key Lab Macromol Sci & Technol, Xian 710072, Peoples R China

[4] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[5] Lamar Univ, Dept Ind Engn, Beaumont, TX 77710 USA

[6] Pacific Northwest Natl Lab, Div Phys Sci, Richland, WA 99354 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2017年 / 5卷 / 22期

基金：

美国国家科学基金会;

关键词：

MICROWAVE-ABSORPTION PROPERTIES; CARBON NANOTUBES; POLYURETHANE NANOCOMPOSITES; ELECTRICAL-PROPERTIES; MECHANICAL-PROPERTIES; SURFACE MODIFICATION; BULK PYROLYSIS; COMPOSITES; GRAPHENE; PERFORMANCE;

D O I：

10.1039/c7tc01502j

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Epoxy nanocomposites reinforced with polypyrrole functionalized nano-magnetite (Fe3O4-PPy) showed significantly enhanced electromagnetic wave absorption performance and flame retardancy. The Fe3O4-PPy nanocomposites were prepared by the surface initiated polymerization method. The epoxy/(30.0 wt%)Fe3O4-PPy nanocomposites possess a minimum reflection loss (RL) value of -35.7 dB, which is much lower than that of either epoxy/(7.5 wt%)PPy nanocomposites with a minimum RL value of -11.0 dB or epoxy/(30.0 wt%)Fe3O4 with a minimum RL value of -17.8 dB at the same thickness (1.7 mm). Meanwhile, the bandwidth of epoxy/(30.0 wt%)Fe3O4-PPy nanocomposites for RL < -10 dB and RL < -20 dB is 4.0 GHz and 0.8 GHz, respectively. The increased interface area, eddy current loss and anisotropic energy are essentially important to achieve higher reflection loss and broader absorption bandwidth for epoxy/(30.0 wt%)Fe3O4-PPy nanocomposites. Moreover, the significantly reduced flammability was observed in the epoxy/(30.0 wt%)Fe3O4-PPy nanocomposites compared with pure epoxy. The total heat release of epoxy/(30.0 wt%) Fe3O4-PPy nanocomposites decreased from 25.5 kJ g(-1) of pure epoxy to just 12.3 kJ g (-1). The tensile strength of the epoxy nanocomposites was reported as well. These new nanocomposites with an enhanced electromagnetic wave absorption property and flame retardancy possess great potential for safer electromagnetic wave absorbers in the electronic industry to satisfy stringent industrial standards.

引用

页码：5334 / 5344

页数：11

共 74 条

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