Korea-Australia Rheology Journal最新文献

{"title":"Non-monotonic settling behavior of a circular solid particle immersed in a vibrating vessel filled with casson fluid","authors":"T. Rezaee,&nbsp;M. Pourjafar-Chelikdani,&nbsp;K. Sadeghy","doi":"10.1007/s13367-026-00155-7","DOIUrl":"10.1007/s13367-026-00155-7","url":null,"abstract":"<div><p>It is a well-established fact that vibration of a vessel in the vertical direction increases the settling velocity of large solid particles in yield-stress liquids obeying the Bingham model. In the present work, using the lattice Boltzmann method (LBM) we numerically show that in shear-thinning, yield-stress fluids obeying the Casson model the response of a circular solid particle settling in a finite-sized vibrating vessel is non-monotonic and exhibits four different settling regimes. Specifically, starting from a low dimensionless frequency of S = 0.8, the settling velocity of the particle progressively increases by vibrating the vessel until a critical frequency of S = 3.9 is reached. Beyond this critical frequency, the settling velocity of the particle starts decreasing until another critical frequency, roughly S = 4.7, is reached. Beyond this frequency, the settling velocity of the particle again increases up to roughly S = 7 beyond which it approaches an asymptotic value. By plotting the yielded zones and viscosity profiles it is shown that competition between yield stress effects with shear-thinning effects combined with the effects of the sidewalls is responsible for such complex settling behavior, not reported before. For particles that are already stuck in yield stress materials, our numerical results show that the amplitude needed to unblock such particles (at any given frequency) is larger for Casson fluid as compared with Bingham fluid. Since both fluid models have the same critical yield number, this finding highlights the importance of the rheological model adopted to represent particulate systems such as foodstuffs.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div><p>A solid particle settling in a vessel filled with viscoplastic fluids obeying the Casson model exhibits non-monotonic behavior depending on the frequency of the vessel (S) and yield stress of the fluid (Y). The non-monotonic effect is attributed to a competition between yielding (low frequencies), side-wall effects (intermediate frequencies) and shear-thinning (high frequencies).</p></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"38 2","pages":"271 - 287"},"PeriodicalIF":2.6,"publicationDate":"2026-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diagnosis for graphite-based anode slurries via in-line electrochemical impedance spectroscopy under pipe flow","authors":"Chan Hyeok Ahn,&nbsp;Man-ho Kim,&nbsp;Jeong Hoon Park,&nbsp;Seunghoon Kang,&nbsp;Jaewook Nam,&nbsp;Sang Hyeok Seo,&nbsp;Kyung Hyun Ahn","doi":"10.1007/s13367-026-00160-w","DOIUrl":"10.1007/s13367-026-00160-w","url":null,"abstract":"<div><p>In battery manufacturing, electrode slurries are transported through pipelines to the coating step. During pipe-flow transport, slurry microstructures can evolve and degrade electrode quality and manufacturing productivity. Conventional off-line tests inherently rely on sampling, which introduces time delay and can yield biased results because the slurry is spatially non-uniform and prone to inhomogeneity. To address these limitations, we construct a laboratory-scale pipe-flow system and directly probe undiluted electrode slurries using in-line electrochemical impedance spectroscopy (EIS) during flow. The in-line EIS distinguishes dispersant-content variations as small as 0.05 wt%. Normalization by a characteristic frequency enables quantitative comparison with conventional off-line EIS result, and the composition-dependent characteristic frequencies remain comparable despite differences in geometry. An equivalent circuit modeling (ECM) links impedance parameters to CMC-driven microstructural transitions. Below the CMC level that saturates surface adsorption, conductive particles agglomerate and the resistance decreases. Above this threshold, excess CMC remains free in the continuous phase, and the effective diffusion length scale decreases with diffusion coefficient changes, consistent with modified ionic transport. Regime-specific ECM trends remain consistent between in-line and off-line data, indicating that the pipe-flow spectra encode composition-dependent microstructural information. Power-law analyses from Ultra-small-angle neutron scattering (USANS) and rheological characterizations independently support these interpretations. Overall, this study demonstrates that in-line EIS measures high-solid slurries reliably under flow and enables real-time, structure-sensitive monitoring in industrial slurry processes.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"38 2","pages":"255 - 269"},"PeriodicalIF":2.6,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13367-026-00160-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single-pellet molding (SPM): a trimming-free rotational rheometry for wide-temperature range viscoelastic characterization of cyclo olefin copolymer","authors":"Jaehyun Kim,&nbsp;Kyung Hyun Ahn","doi":"10.1007/s13367-026-00159-3","DOIUrl":"10.1007/s13367-026-00159-3","url":null,"abstract":"<div>\u0000 \u0000 <p>Conventional viscoelastic characterization of thermoplastic amorphous polymers employs rotational rheometer above the glass transition temperature (T_g) and Dynamic Mechanical Analysis below T_g. This work proposes a Single-Pellet Molding (SPM) method that enables comprehensive viscoelastic characterization across both regimes using a single rotational rheometer. The SPM procedure involves introducing a single polymer pellet into a custom mold seated on the lower plate, compressing the pellet with the upper plate, and molding a cylindrical sample between the parallel plates. This approach offers a critical advantage for thermally and oxidatively sensitive polymers, as sample preparation can be completed in air at temperatures below the trimming threshold without requiring an inert gas atmosphere. Whereas conventional preprocessing (requiring chamber opening for trimming) introduces cooling-induced artifacts to both sample and shaft geometry, that may lead to human error, the SPM method fundamentally eliminates these sources of uncertainty. SPM enables reproducible QC testing across T_g for Cyclo olefin copolymer (COC), addressing recycling limitations critical to smartphone camera lens production scraps. Validation experiments comparing SPM to traditional trimming procedures, using 5 mm diameter parallel plates, demonstrate a 69% improvement in reproducibility (relative standard deviation: 3.52% → 1.09%). By directly measuring and calibrating both the thermal expansion coefficient and torsional compliance of the measuring tool, we confirm continuous acquisition of consistent viscoelastic data from the polymer melt temperature through sub-T_g region using a single instrument. The method significantly reduces measurement time, requires minimal sample mass (10–20 mg), eliminates nitrogen gas costs, and enables low-temperature measurement without thermal degradation. We anticipate immediate industrial applicability for rapid, economical material characterization in development and quality verification workflows.</p>\u0000 <span>AbstractSection</span>\u0000 Graphical abstract\u0000 <div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div>\u0000 \u0000 </div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"38 2","pages":"241 - 253"},"PeriodicalIF":2.6,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13367-026-00159-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effects of SBR polymer and nano-CaCO3 on rheological performance and stability of asphalt binder","authors":"Mohammed Ibrahim,&nbsp;Mohammad Shafi Mir","doi":"10.1007/s13367-026-00157-5","DOIUrl":"10.1007/s13367-026-00157-5","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the flow behaviour and phase stability of bituminous binders modified using a composite system of Styrene Butadiene Rubber (SBR) and nano-sized calcium carbonate (CaCO₃). Multiple binder formulations were developed with varying SBR contents (3%, 4% and 5%) while keeping Nano-CaCO₃ constant at 4% to evaluate their effectiveness in improving high-temperature performance and blend homogeneity. The experimental program included conventional binder tests (penetration, softening point, and ductility), rotational viscosity at 135 °C, Superpave rutting parameter assessment (G*/Sin δ), failure temperature determination, and Multiple Stress Creep and Recovery (MSCR) testing. Results demonstrated that composite modification significantly reduced penetration values while increasing softening point and viscosity, indicating enhanced stiffness and rutting resistance. MSCR results showed notable reductions in non-recoverable creep compliance (Jnr) and improvements in elastic recovery (R%), particularly at higher SBR dosages. The modified binders also exhibited increased failure temperatures, reflecting improved thermal resistance. Among all formulations, 4S + 4C and 5S + 4C binders provided superior rutting resistance but exhibited elevated viscosity exceeding recommended workability limits. Overall, the SBR/Nano-CaCO₃ composite system effectively enhances asphalt binder mechanical performance and phase stability, offering a promising approach for pavement applications.</p>\u0000 <span>AbstractSection</span>\u0000 Graphical Abstract\u0000 <div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div>\u0000 \u0000 </div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"38 2","pages":"229 - 240"},"PeriodicalIF":2.6,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of injection molding conditions for polyphthalamide-based thermoplastic lighting packages for smart farms using three-dimensional flow analysis and the Taguchi method","authors":"Min Gyeong Kang,&nbsp;Seong Yun Kim","doi":"10.1007/s13367-026-00158-4","DOIUrl":"10.1007/s13367-026-00158-4","url":null,"abstract":"<div>\u0000 \u0000 <p>In this study, the injection molding process of a polyphthalamide (PPA)-based thermoplastic polymer package was optimized for application in high-temperature and high-humidity smart farm environments. A numerical three-dimensional flow analysis was conducted to predict the shrinkage behavior under varying packing pressure, mold temperature, injection pressure, melt temperature, and packing time. The predicted results were applied using an orthogonal array, and the Taguchi method was employed to determine the influence of each factor and identify the optimal conditions. As a result, melt temperature and packing time were found to have the most significant statistical impact on shrinkage. Under the optimized conditions (packing pressure of 140 MPa, mold temperature of 90 ℃, injection pressure of 140 MPa, melt temperature of 280 ℃, and packing time of 20 s), the minimum shrinkage value (signal-to-noise ratio = − 12.36 dB) was achieved. The theoretical and experimental shrinkage results obtained from the optimized processing conditions were in excellent agreement.</p>\u0000 <span>AbstractSection</span>\u0000 Graphical Abstract\u0000 <div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div>\u0000 \u0000 </div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"38 2","pages":"219 - 227"},"PeriodicalIF":2.6,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Solvent-assisted mixing of Ag/MWCNT/PDMS composites for stretchable conductors","authors":"Ji-Won Kang,&nbsp;Eun Hui Jeong,&nbsp;Jun Dong Park,&nbsp;Byoung Soo Kim","doi":"10.1007/s13367-026-00156-6","DOIUrl":"10.1007/s13367-026-00156-6","url":null,"abstract":"","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"38 2","pages":"289 - 289"},"PeriodicalIF":2.6,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of copper incorporation into silver nanoparticles on the structural, morphological, and rheological properties of lead-free pastes for solar cell applications","authors":"Hazmoune Abdessalam,&nbsp;Lounis Azeddine,&nbsp;Abdelmounaim Chetoui,&nbsp;Ilyas Belkhettab,&nbsp;Ismail Bencherifa,&nbsp;Ahmed Kellai","doi":"10.1007/s13367-026-00154-8","DOIUrl":"10.1007/s13367-026-00154-8","url":null,"abstract":"<div><p>This study aims to optimize the synthesis of silver-based pastes with favorable rheological properties for screen-printing applications in solar cell manufacturing. Silver (Ag) and copper-doped silver (Cu–Ag) nanoparticles were successfully synthesized via the hydrothermal method. Structural characterization by X-ray diffraction confirmed the formation of pure cubic-phase silver, with no detectable impurity phases. Rietveld refinement was employed to determine lattice parameters, crystallite size, lattice strain, and dislocation density. Scanning electron microscopy (SEM) revealed rough, spherical to irregularly shaped particles, some exhibiting faceted surfaces. Energy-dispersive X-ray spectroscopy (EDS) confirmed the metallic nature of silver through characteristic Ag 3d₅/₂ and 3d₃/₂ peaks, while copper incorporation was validated by the Cu 2p doublet. In parallel, the XRD patterns of synthesized glass frits (GF-Ti and GF-Zr) exhibited peaks characteristic of amorphous structures, confirming successful formation. SEM analysis showed that GF-Ti had a highly irregular and porous morphology, whereas GF-Zr presented a denser and more compact structure. The porous GF-Ti glass frit may absorb more binder and hence increase the viscosity of the produced paste. These findings provide a foundation for the development of advanced conductive pastes tailored for photovoltaic applications. Rheological measurements revealed that all formulations exhibit shear-thinning or pseudo-plastic behavior, with viscosity decreasing under shear. The power-law model accurately described the flow behavior, showing that additives, particularly the ionic surfactant (Ti), significantly increased the consistency index compared to the base organic vehicle. Among all the pastes synthesized in this study, the Ag2-Ti formulation exhibited the most favorable rheological performance for metallic contacts printing in solar cells, with a flow index <i>n</i> = 0.5 and a consistency index K = 4000 Pa·sⁿ. The line profile obtained by optical microscopy showed thick, dense and well-defined printed contacts for Ag2-Ti paste with the absence of any remarkable edges along the boundaries. The electrical characterizations using the Transmission Line Method (TLM) showed a lower value of specific contact resistivity of 1.53 mΩ. cm² for the optimized Ag2-Ti material.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"38 2","pages":"199 - 217"},"PeriodicalIF":2.6,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single-point correction for representative shear rate and strain in parallel plate rheometry derived from energy-dissipation rate analysis","authors":"Shin Hyun Kang,&nbsp;Hye-Jin Ahn,&nbsp;Sun Chul Huh,&nbsp;Wook Ryol Hwang","doi":"10.1007/s13367-026-00153-9","DOIUrl":"10.1007/s13367-026-00153-9","url":null,"abstract":"<div><p>In this study, a single-point correction is investigated for determining representative shear rate and strain magnitude in parallel-plate rheometry, where shear stress is inherently non-uniform due to spatial variations in shear rate and strain. The correction is derived from the flow quantification approach based on the energy-dissipation rate. The correction factor of 0.765 to the tip shear rate and strain is found to coincide with the previously reported geometric one-point correction factor corresponding to the representative radius, at which the local shear stresses of a Newtonian and a non-Newtonian (power-law) fluid are equivalent. The correction has been validated for steady shear viscosity and large amplitude oscillatory shear measurements with four different non-Newtonian fluids: two aqueous xanthan gum solutions of 1 and 2 wt%, two aqueous PEO solutions of 2 and 4 wt%. The accuracy was assessed in comparison with measurements with the cone-and-plate fixture. The steady shear viscosity data exhibits the average relative errors less than 4.5% (in case of PEO solutions) and 10% (xanthan gum solution) for a wide shear rate range from 0.01 to 1000 [1/s]. The LAOS test data shows the average relative errors in both storage and loss moduli are limited to 4.2% (2 wt% PEO solution) and 7.85% (4 wt% PEO solution) for the strain magnitude range from 0.03 to 1000%.</p><h3>Graphical Abstract</h3><p>Steady shear viscosity and LAOS data with 2 wt% PEO 4M solution for wide ranges of shear rate and strain magnitude from the single-point correction with parallel plate (PP) geometry (1mm gap) and other three methods: measurement with cone and plate geometery (CP), volume-averaging scaling with PP and raw rheometer data with PP.</p><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"38 2","pages":"189 - 198"},"PeriodicalIF":2.6,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147862994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental evaluation of asphalt binder with lignin-rich black liquor and waste engine oil additives","authors":"Akshat Sharma,&nbsp;Amardeep Boora","doi":"10.1007/s13367-026-00152-w","DOIUrl":"10.1007/s13367-026-00152-w","url":null,"abstract":"<div><p>Conventional binders used in flexible pavements often suffer from rutting at high temperatures and cracking under ageing. Polymer modifiers can improve performance but are costly and environmentally demanding. To address these limitations, this study investigates the combined use of black liquor (BL), a lignin-rich by-product of the pulp industry and waste engine oil (WEO) as waste derived modifiers for VG 30 bitumen. In this work, VG 30 was modified with 10–30% BL and 3–12% WEO, and tested for physical, chemical and rheological performance. BL increased binder stiffness and thermal stability, while WEO improved flexibility and reduced brittleness; their combined use produced a balanced viscoelastic response, with blends containing 20–30% BL and 6–9% WEO showing optimal rutting resistance and elasticity. The 30% BL + 9% WEO blend achieved a high-temperature grade of PG 76 and exhibited lower non-recoverable creep compliance (J_nr) than neat VG 30 when tested at the same temperature, indicating improved rutting resistance, while maintaining 55% elastic recovery. FTIR analysis confirmed that modification occurs primarily through physical blending. A TOPSIS-based multi-criteria decision analysis (MCDA) identified 30% BL + 9% WEO as the most suitable formulation for hot, heavy-traffic conditions, and 20% BL + 9% WEO for moderate climates. A screening-level cradle-to-gate life cycle assessment indicated that partial replacement of bitumen with BL and WEO can reduce greenhouse gas emissions and energy demand. Overall, BL–WEO modification provides a low-cost and environmentally favorable alternative to polymer-modified binders while maintaining strong high-temperature performance.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"38 2","pages":"165 - 187"},"PeriodicalIF":2.6,"publicationDate":"2026-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147862995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stability of petroleum coke water slurry: influence of sodium lignosulfonate and rheological properties","authors":"Seyed Esmail Fazljoo,&nbsp;Maryam Fakharzadeh","doi":"10.1007/s13367-026-00151-x","DOIUrl":"10.1007/s13367-026-00151-x","url":null,"abstract":"<div><p>Petroleum coke water slurry stability is essential for storage and transportation. The present study examined the rheological behavior and stability performance of petroleum coke water slurry using a bead mill and sodium lignosulfonate as a dispersant and stabilizer.This method achieves smaller particle sizes (290 nm) for PCWS, improving dispersion compared to conventional CWS systems. To this end, the effects of particle size distribution (PSD), sodium lignosulfonate (SL) concentration, milling time, and pH of petroleum coke water slurry were investigated. Apparent viscosity and rheological properties were measured using a rotary rheometer. The results revealed that the apparent viscosity of petroleum coke water slurry decreased with the addition of sodium lignosulfonate concentration. Petroleum coke water slurry behaved as a pseudo-plastic fluid with the addition of sodium lignosulfonate. The rheological characteristic curves exhibited pseudo-shear-thinning fluid characteristics with increasing sodium lignosulfonate concentration. Petroleum coke water slurry with 6 wt% sodium lignosulfonate showed the best stability performance. By increasing the milling time and decreasing the particle size, the apparent viscosity of petroleum coke water slurry decreases, and the zeta potential increases. This, in turn, increases the stability of petroleum coke water slurry. The results showed that pH of around 9 was found to be the most favorable environment to rheological characteristics. At pH 11, the zeta potential reached its highest point, measuring 64.1 mV.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture><span>The alternative text for this image may have been generated using AI.</span></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"38 2","pages":"151 - 163"},"PeriodicalIF":2.6,"publicationDate":"2026-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}