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Optically transparent and lightweight nanocomposite substrate of poly(methyl methacrylate-co-acrylonitrile)/MWCNT for optoelectronic applications: an experimental and theoretical insight

  • Composites & nanocomposites
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Abstract

The electrically conductive and optically transparent flexible nanocomposites made of polymers and multi-walled carbon nanotube (MWCNT) have the potential to be used as a transparent substrate for optoelectronic applications. In this investigation, we have fabricated a series of nanocomposites of MWCNT, used as conductive filler, with a copolymer of methyl methacrylate and acrylonitrile as a matrix, and solution blending method was used to achieve suitable dispersions. The MWCNT content varied sequentially in these nanocomposite thin films. A detailed study about the dispersion of MWCNTs in the matrix was done by attenuated total reflectance-infrared spectroscopy, Raman spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy. The surface roughness is continuously increasing with an increase in the amount of conductive filler in the polymer matrix. However, it never exceeds 10 nm, which is very small compared to the MWCNT length, and also confirmed nearly complete embedding of conducting filler in the insulating matrix. The diffusion coefficient of nanocomposite was investigated for O2 and H2O with Molecular Dynamics simulations and found to decrease with increasing load percentage of MWCNT. The thin film’s optical transmittance and electrical conductivity are characterized thoroughly. An optimized formulation of nanocomposite with 0.25% MWCNT has shown enhanced conductivity of 10–2 S/cm (semiconductive range) with ~ 94% optical transparency at 550 nm.

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Acknowledgements

The first and second authors are thankful to MHRD for their fellowship. The first author is highly grateful to Mr. Mohd. Asif of NPL, Delhi, for their assistance in performing the test of electrical conductivity. US is also thankful to Ms. Vaishali Saroha, Rupam Gogoi, and Mr. Rahul Sharma of IIT Roorkee for their support.

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Authors and Affiliations

  1. Department of Polymer and Process Engineering, IIT Roorkee Saharanpur Campus, Saharanpur, 247001, India

    Uday Shankar, Sushanta K. Sethi, Gaurav Manik & Anasuya Bandyopadhyay

  2. CSIR-National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi, 110012, India

    Bhanu P. Singh & Ashok Kumar

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  1. Uday Shankar
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  2. Sushanta K. Sethi
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  3. Bhanu P. Singh
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  4. Ashok Kumar
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  5. Gaurav Manik
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  6. Anasuya Bandyopadhyay
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Contributions

US was involved in conceptualization, methodology, investigation, and writing—original draft. SKS was involved in methodology, investigation, and writing—original draft. BPS was involved in MWCNT-synthesis, characterization-Raman spectroscopy, writing—review & editing. AK was involved in characterization-electrical conductivity, and writing—review & editing. GM was involved in conceptualization and writing—review & editing. AB was involved in conceptualization, project administration, funding acquisition, and writing—review & editing.

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Correspondence to Gaurav Manik or Anasuya Bandyopadhyay.

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Shankar, U., Sethi, S.K., Singh, B.P. et al. Optically transparent and lightweight nanocomposite substrate of poly(methyl methacrylate-co-acrylonitrile)/MWCNT for optoelectronic applications: an experimental and theoretical insight. J Mater Sci 56, 17040–17061 (2021). https://doi.org/10.1007/s10853-021-06390-3

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