|
|||||
|
|
Exploring interfacial interactions,dielectric, ferroelectric and piezoelectric properties of ultrahigh molecular weight polyethylene/graphene oxide nanocomposites |
|
| Authors: | Akanksha Adaval Cherumannil K. Subash Valiyaveetil H. Shafeeq Shiva Singh Pradip K. Maji Mohammed Aslam Terence W. Turney George P. Simon Arup R. Bhattacharyya |
| Affiliation: | 1. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai, India Department of Materials Science and Engineering, Monash University, Clayton, Victoria, Australia IITB-Monash Research Academy, Indian Institute of Technology Bombay, Mumbai, India Contribution: Conceptualization (equal), Investigation (lead), Methodology (equal), Writing - original draft (lead);2. Centre for Nano and Soft Matter Sciences, Arkavathi Campus, Bengaluru, India Contribution: Investigation (supporting), Writing - review & editing (supporting);3. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai, India Contribution: Investigation (supporting), Writing - review & editing (supporting);4. Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur, India Contribution: Investigation (supporting);5. Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur, India Contribution: Writing - review & editing (supporting);6. Department of Physics, Indian Institute of Technology Bombay, Mumbai, India Contribution: Writing - review & editing (supporting);7. Department of Materials Science and Engineering, Monash University, Clayton, Victoria, Australia Contribution: Writing - review & editing (supporting);8. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai, India |
| Abstract: | Graphene oxide (GO) incorporated ultra-high molecular weight polyethylene (UHMWPE) nanocomposites were prepared by encapsulating GO by UHMWPE in an aqueous media via high-shear mixing, which were subsequently dried and compression molded. Morphological characterizations via scanning electron microscopy revealed the intercalation of UHMWPE chains in the graphitic stacks corresponding to GO. Further, dielectric permittivity of UHMWPE/GO nanocomposite of 1 wt% GO showed a drastic increase (~61) as compared to pure UHMWPE (~2) due to an enhanced interfacial polarization. A significantly higher value of remnant polarization (~10 nC/cm2) and coercive field (~3 kV/cm) was observed in UHMWPE/GO nanocomposite of 1 wt% GO, which showed a strong hysteresis loop of polarization versus electric field plot as compared to pure UHMWPE, which displayed a very weak hysteresis loop. The piezoelectric coefficient (d33) of ~9.5 pm/V was estimated in UHMWPE/GO nanocomposite of 1 wt% GO via piezoresponse force microscopy. Nanocomposite sensor devices were also fabricated and piezoelectric output voltage of ~6 V was recorded in UHMWPE/GO nanocomposite of 1 wt% of GO. We report here for the first time the unique ferroelectric and piezoelectric properties displayed by UHMWPE/GO nanocomposites. |
| Keywords: | compression molding interphase layered structures nanocomposites sensing |