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Raman, Akhila, et al. Materials Research Bulletin (2025): 113619.
Graphene nanoplatelets (GNPs) have emerged as multifunctional nanofillers for developing sustainable, high-performance polymer composites. In this study, GNPs were incorporated into a partially bio-based epoxy matrix (28% bio-content) to prepare shape memory polymer nanocomposites with dual-responsive actuation capabilities. The nanocomposites respond to both thermal and near-infrared (NIR, 808 nm) stimuli, enabling remote-controlled shape recovery-an essential feature for applications in soft robotics, aerospace components, biomedical devices, and smart textiles.
GNPs were dispersed at varying loadings (0.1-1.5 wt%) via ultrasonication, followed by the addition of tannic acid as a bio-based curing agent in a 0.5:1 hydroxyl-to-epoxide ratio. After solvent evaporation and thermal curing at 150 °C for 15 hours, the resulting composites displayed significantly enhanced mechanical and thermal performance. Notably, fracture toughness improved by 238.5% compared to the neat resin.
The integration of GNPs not only improves structural integrity but also imparts photothermal functionality. Upon NIR exposure, GNPs convert light energy into localized heat, triggering the shape recovery process without direct heating. This photothermal responsiveness, combined with the bio-based content, aligns with sustainable material development goals.
This case highlights the effective use of graphene nanoplatelets in fabricating eco-friendly, smart materials with superior toughness and remote actuation, demonstrating their crucial role in next-generation shape memory systems.
Divya, S., S. Praveen Kumar, and N. Shanmugasundaram. Journal of Building Engineering (2025): 112966.
Graphene nanoplatelets (GNPs) have demonstrated excellent potential as nano-fillers for enhancing the mechanical durability and chemical resistance of cementitious composites. In this study, concrete blends incorporating 0.25 wt% GNPs and 60 wt% copper slag (CS) were formulated to assess their resilience against aggressive environments including sulfate, acid, and chloride exposure
GNPs function as microstructural densifiers, reducing porosity and enhancing the continuity of hydration products. Concurrently, copper slag contributes pozzolanic activity, leading to additional C-S-H gel formation and pore refinement. The optimized GNP-CS composite exhibited significant improvements in acid and sulfate resistance, with a 7.60% and 9.06% reduction in compressive strength loss under respective attacks compared to conventional concrete.
Microstructural analysis confirmed the dual role of GNPs and CS in minimizing chemical ingress pathways. The electrical non-conductivity of the synthesized GNPs further supports their application as fillers without compromising the dielectric properties of the matrix. Statistical modeling, including regression analysis and ANOVA, validated strong correlations between water absorption and bulk density (R² = 0.9947), as well as between RCPT results and electrical resistivity (R² = 0.9911), reinforcing the reliability of the performance metrics.
This work highlights that Graphene Nanoplatelets are effectively used for the preparation of high-durability concrete, offering an innovative route toward sustainable infrastructure with enhanced longevity in chemically aggressive environments.
Ramu, Adam Gopal, Minjung Song, and Dongjin Choi. Separation and Purification Technology 372 (2025): 133511.
Graphene nanoplatelets (GnPs) have emerged as a powerful component in environmental remediation technologies. In this study, GnPs were integrated into a magnetic composite-Fe₃O₄-GnP-PANI-via a two-step polymerization approach to enhance the adsorption efficiency of phenolic pollutants from aqueous environments. The composite was synthesized by first preparing Fe₃O₄ microspheres through a solvothermal method, followed by incorporation of GnPs and in-situ polymerization of polyaniline (PANI)
GnPs served a dual role: they significantly increased the composite's surface area and enriched it with functional groups for pollutant interaction. Additionally, the π-π conjugated structure of GnPs promoted strong π-π stacking with aromatic contaminants. Under neutral pH, the composite demonstrated excellent adsorption capacities for bisphenol A (17.01 mg/g), 1-naphthol (46.48 mg/g), and 2-naphthol (73.84 mg/g), with a maximum uptake of 132.3 mg/g for phenolic mixtures.
Adsorption followed a pseudo-first-order kinetic model and Langmuir isotherm, involving electrostatic interactions, π-π stacking, and hydrogen bonding. Notably, the composite showed outstanding stability, maintaining 97.8% desorption efficiency after 10 reuse cycles, and resisted interference from ionic strength.
These findings confirm that Graphene Nanoplatelets are used for the preparation of Fe₃O₄-GnP-PANI magnetic composites with superior adsorption performance, offering a robust, reusable solution for removing endocrine-disrupting phenolic compounds from contaminated water systems.
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