An effective EMI shielding material based on poly(trimethylene terephthalate) blend nanocomposites with multiwalled carbon nanotubes

被引：20
作者：
Ajitha, A. R. [1 ]
Arif, Mohammed P. [1 ]
Aswathi, M. K. [1 ]
Mathew, Lovely P. [1 ,2 ]
Geethamma, V. G. [1 ]
Kalarikkal, Nandakumar [1 ,3 ]
Thomas, Sabu [1 ,4 ,5 ]
Volova, Tatiana [5 ]
机构：
[1] Mahatma Gandhi Univ, Int & Inter Univ Ctr Nanosci & Nanotechnol, Kottayam 686560, Kerala, India
[2] Viswajyothi Coll Engn & Technol, Muvattupuzha 686670, Kerala, India
[3] Mahatma Gandhi Univ, Sch Pure & Appl Phys, Kottayam 686560, Kerala, India
[4] Mahatma Gandhi Univ, Sch Chem Sci, Kottayam 686560, Kerala, India
[5] Siberian Fed Univ, 79 Svobodnyi Av, Krasnoyarsk 660041, Russia
来源：
NEW JOURNAL OF CHEMISTRY | 2018年 / 42卷 / 16期
关键词：
ELECTRICAL-CONDUCTIVITY; POLYMER BLENDS; DIELECTRIC-PROPERTIES; MECHANICAL-PROPERTIES; DC CONDUCTIVITY; COMPOSITES; PERFORMANCE; MORPHOLOGY; LOCALIZATION; SUPERCAPACITOR;
D O I：
10.1039/c8nj02410c
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The effects of blend ratio and MWCNT loading on the morphology, electrical properties and electromagnetic shielding performance of poly(trimethylene terephthalate) (PTT)/polypropylene (PP) blend nanocomposites were studied. To understate the state of dispersion of the MWCNTs, PTT/PP blend nanocomposites were systematically analyzed using scanning electron microscopy and high resolution transmission electron microscopy. Fourier transform spectroscopy (FT-IR) and Raman spectroscopy techniques were used to understand the chemical interactions between the blend components and fillers. Among the nanocomposites of all blend composition with 1 wt% MWCNTs, composites with high wt% PTT (90PTT/10PP/1MWCNT) showed better electrical properties due to the double percolation phenomenon. The shielding effectiveness (SE) was investigated in the S-band frequency range and 90PTT/10PP/1MWCNT showed a very good shielding effectiveness for electromagnetic radiation. Further studies with different MWCNT loadings showed that the 90PTT/10PP blend with 5 wt% MWCNTs indicated high dielectric properties and a maximum SE of approximate to 40 dB. The conductivity results were linearly fitted by a power law and the obtained percolation threshold was found to be around 0.5 wt% MWCNTs. Theoretical models were also applied for the DC conductivity data to explain the conductive mechanism in the polymer blend nanocomposites.
引用
收藏
页码：13915 / 13926
页数：12
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