ArticleDiscover nano2026
Development and functional assessment of a polymer supported nanoscale iron hybrid for sustainable enhancement of water based drilling fluids.
Article in Discover nano, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Eco-friendly biopolymers in water-based drilling fluids often suffer from thermal degradation and inadequate filtration control under harsh downhole conditions. To overcome these limitations, this study aimed to develop a high-performance, sustainable hybrid nanocomposite that synergistically combines the structural resilience of biopolymers with the mechanical strength and pore-plugging capabilities of metallic nanoparticles. A ternary nanocomposite (IRON-NC) was synthesized via an in-situ reduction-stabilization method, embedding nanoscale zero-valent iron (nZVI) within a crosslinked chitosan and carboxymethyl cellulose (CMC) matrix. The material's morphology, chemical interactions, and electrokinetic properties were characterized, followed by comprehensive rheological and filtration evaluations under both standard and high-pressure/high-temperature (HPHT) conditions. Unlike standalone biopolymer additives, this hybrid architecture leveraged strong electrostatic repulsion (zeta potential of -48.5 mV) and robust polymer-metal bonding to ensure uniform dispersion and exceptional thermal reliability. At a remarkably low optimal dosage of 1000 ppm, IRON-NC induced pronounced shear-thinning behavior, increasing plastic viscosity to 37.6 cP and yield point to 13 Pa to ensure effective cuttings suspension. Furthermore, the nZVI-reinforced matrix facilitated the deposition of a highly compact, structurally resilient filter cake, reducing both API and HPHT fluid loss by 43-47% compared to the base fluid. The synergistic integration of nZVI with the chitosan-CMC network effectively resolves the thermal and mechanical vulnerabilities associated with conventional eco-friendly additives. Ultimately, IRON-NC presents a highly efficient, multifunctional, and environmentally compliant solution for improving rheology, stability, and fluid loss control in advanced drilling operations.
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