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Stretchable and lightweight MWCNTs/TPU composites films with excellent electromagnetic interference shielding and dynamic mechanical properties

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Abstract

Stretchable composites have drawn the significant focus of researchers due to their necessity and importance in advanced technical areas. In this paper, we prepared the multiwall carbon nanotube (MWCNTs)/thermoplastic polyurethane (TPU) composites with excellent dispersion using the double extrusion followed by solvent casting techniques. These techniques enhanced the interaction between the MWCNTs and TPU. The electrical properties, electromagnetic interference (EMI) shielding and dynamic mechanical analysis of the prepared MWCNTs/TPU composites are analyzed. The EMI shielding performance at different phr of MWCNTs reinforced TPU composites is determined in the X-band frequency range. The 20 phr MWCNTs reinforced TPU composite having a thickness of 0.15 mm showed a total shielding effectiveness of \(\sim\) 37.4 dB, which is much higher as compared to pure TPU. The improvement in electrical properties is well supported by scanning electron microscopy (SEM) images and Raman spectroscopic analysis. SEM is used to analyze the dispersion of MWCNTs within the TPU matrix. The morphology showed that MWCNTs are well dispersed in the TPU matrix with the addition of 5phr MWCNTs. It was found that 5phr MWCNTs reinforced TPU composites have an excellent value of storage modulus, loss modulus and tan \(\updelta\) which exhibit better properties as compared to the other MWCNTs reinforced TPU composites. The enhancement in DMA properties is due to the strong interfacial interaction between the fillers and matrix. These stretchable and light weight MWCNTs/TPU composites act as excellent EMI shielding materials, especially in next-generation defense and electronic devices industries.

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Acknowledgements

The CSIR- National Physical Laboratory and Panjab University, Chandigarh for providing necessary facilities and infrastructure used in the present research. One of the authors thanks UGC for the DS Kothari fellowship (EN/18-19/0063).

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Authors and Affiliations

  1. Mechanical Engineering Division, School of Energy Systems Engineering, Chung-Ang University, 84 Heukseok-Ro, Dongjak-Gu, Seoul, 06974, South Korea

    Jeevan Jyoti & Seunghwa Yang

  2. Advanced Carbon Products and Metrology, CSIR-National Physical Laboratory, 110012, New Delhi, India

    Gaurav Singh Chauhan & Bhanu Pratap Singh

  3. Centre of Advanced Studies, Physics Department, Panjab University, 160014, Chandigarh, India

    Jeevan Jyoti & Surya Kant Tripathi

  4. Department of Physics, Yeungnam University, 280 Daehak-Ro, 38541, Gyeongsan, Gyeongbuk, South Korea

    Ki Hyeon Kim

  5. Department of Electronics and Communication, Guru Nanak Dev University, Punjab, Amritsar, India

    Manjit Sandhu

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  1. Jeevan Jyoti
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Jyoti, J., Chauhan, G.S., Yang, S. et al. Stretchable and lightweight MWCNTs/TPU composites films with excellent electromagnetic interference shielding and dynamic mechanical properties. J Polym Res 30, 322 (2023). https://doi.org/10.1007/s10965-023-03690-x

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