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Mechanical exfoliation of coconut husk into bio-based graphene for sustainable drilling mud: a Taguchi–GRA Study

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2025, 35(5), pp.2459~2475
  • DOI : 10.1007/s42823-025-00938-y
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : April 14, 2025
  • Accepted : May 30, 2025
  • Published : December 11, 2025

Safian Muhammad Taqi-uddeen 1 Pandian Bothi Raja 1 Kahar Nur Ezzah Abdul 2 Ibrahim Mohamad Nasir Mohamad 1

1Materials Technology Research Group (MaTRec), School of Chemical Sciences, Universiti Sains Malaysia
2Science and Engineering Research Centre (SERC), Engineering Campus, Universiti Sains Malaysia

Accredited

ABSTRACT

This study investigates the sustainable synthesis of biobased graphene (BG) derived from coconut husk waste and its application in eco-friendly water-based drilling muds (WBM). The BG was prepared through thermal exfoliation of lignin and utilized as a fluid loss additive, while benzimidazole (BI) was incorporated to serve as a corrosion inhibitor. To optimize performance, the Taguchi method was combined with Grey Relational Analysis (GRA), targeting three key parameters: viscosity, fluid loss, and corrosion resistance. Structural characterization revealed that BG synthesized at 1000 °C exhibited improved graphitic ordering, with an average flake diameter of around 20 nm and an interlayer spacing (d-spacing) of 3.49 Å. In terms of performance, incorporating 0.5 wt% BG reduced fluid loss by 50%, while 5 wt% BI delivered an impressive corrosion inhibition efficiency of 96.9%. The optimal mud formulation was achieved using 0.5 wt% BG, 5 wt% BI, 60 min of mixing time, and 8 wt% bentonite. Altogether, this work highlights a sustainable pathway for drilling fluid formulation by valorizing agricultural waste and minimizing additive loadings—without compromising on performance or environmental compatibility.

Citation status

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