Chemical Engineering Journal最新文献

{"title":"Molecular engineering enables reversible thermochromism in polydiacetylene vesicles","authors":"Chanhee Yang, Jung-Moo Heo, Jong-Man Kim","doi":"10.1016/j.cej.2026.182756","DOIUrl":"https://doi.org/10.1016/j.cej.2026.182756","url":null,"abstract":"Conjugated polydiacetylenes (PDAs) are stimulus-responsive colorimetric materials whose visible chromatic transitions arise from changes in molecular packing and backbone conformation. In particular, thermochromism provides a direct optical readout of heat-induced supramolecular reorganization, but reversible PDA thermochromism remains difficult in aqueous media because thermal perturbation often causes irreversible packing disruption, aggregation, or incomplete blue-phase recovery. Here, we report a vesicular PDA system in which reversible blue-to-red thermochromism is enabled by molecular engineering of the amphiphilic diacetylene monomer. A series of structurally related amphiphilic diacetylene monomers containing a central disulfide linker were designed and comparatively investigated to clarify the distinct roles of internal amide hydrogen bonding and terminal carboxylic acid functionality. After vesicle formation and photopolymerization, the target PDA vesicle exhibited highly reversible thermochromic behavior, whereas the carboxyl-free analogue showed incomplete color recovery and the ester analogue displayed markedly reduced thermal stability. Thermal and spectroscopic analyses revealed that internal amide hydrogen bonding provides a thermally robust supramolecular scaffold, while terminal carboxylic acids promote interfacial packing recovery after thermal perturbation. Colloidal analyses further showed that the vesicular morphology was largely preserved up to 100 °C, indicating that the reversible chromatic transition originates primarily from molecular-level packing reorganization rather than particle-level disassembly. These results establish a molecular engineering principle for aqueous-processable, reusable, and thermally robust PDA-based colorimetric materials.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"62 1","pages":"182756"},"PeriodicalIF":15.1,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ionic microenvironment regulation of 2PACz buried contacts enables low-loss 1.73 eV perovskite solar cells","authors":"Zhaodong Peng, Xin Yao, Junhui Liang, Jingxian Huang, Bowen Zheng, Jing Song, Qi Ai, Peiqing Cai, Junjie Si, Gongxun Bai, Zugang Liu","doi":"10.1016/j.cej.2026.182792","DOIUrl":"https://doi.org/10.1016/j.cej.2026.182792","url":null,"abstract":"Wide-bandgap perovskite solar cells are limited by nonradiative losses originating not only from the absorber but also from the buried charge-selective contact that governs film formation. Here, NH<ce:inf loc=\"post\">4</ce:inf>BF<ce:inf loc=\"post\">4</ce:inf> is incorporated into the 2PACz processing solution to regulate the ionic deposition environment of the buried hole-selective contact. The modification leaves the contact energetics nearly unchanged while markedly reducing mesoscale topographic heterogeneity and altering the local chemical environment and wettability of the contact. These changes are associated with a slower apparent solidification process and more controlled growth of the overlying 1.73 eV mixed-halide perovskite, yielding enlarged grains and reduced trap-related losses. Consequently, for the champion devices the open-circuit voltage increases from 1.192 to 1.289 V, while the champion power-conversion efficiency increases from 18.17% to 21.69%. The corresponding voltage deficit decreases from 0.538 to 0.441 V. Under stabilized power-output (SPO) tracking at a fixed bias for 600 s, the target device maintains a higher plateau than the control, and unencapsulated target devices retain more than 90% of their initial efficiency after 1000 h of dark storage at 25 °C under N<ce:inf loc=\"post\">2</ce:inf>. These results identify buried-contact-crystallization coupling, rather than substantial energy-level realignment, as the dominant pathway by which the ionic processing microenvironment reduces voltage losses in wide-bandgap perovskite solar cells.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"32 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-species hybrid CFD/1-D modelling of biomethanation bubble columns: Dynamic response to intermittent renewable supply","authors":"Ali M. Sefidan, Hamid Reza Godini, Jari Vepsäläinen","doi":"10.1016/j.cej.2026.182261","DOIUrl":"https://doi.org/10.1016/j.cej.2026.182261","url":null,"abstract":"Biological methanation of H<ce:inf loc=\"post\">2</ce:inf> and CO<ce:inf loc=\"post\">2</ce:inf> is a key Power-to-Gas pathway. How these reactors respond to the second-to-minute fluctuations that renewable-powered electrolysis actually delivers, however, remains largely uncharacterised. We develop a dynamic multi-species model of a porous-plate bubble column with gas recirculation, in which H<ce:inf loc=\"post\">2</ce:inf>, CO<ce:inf loc=\"post\">2</ce:inf> and CH<ce:inf loc=\"post\">4</ce:inf> are resolved independently in both phases, the dissolved-CO<ce:inf loc=\"post\">2</ce:inf> pool is speciated through an explicit carbonate–bicarbonate equilibrium, and the headspace and recirculation loop are coupled dynamically to the column. An axisymmetric CFD model of the same reactor verifies the radial-averaging assumption behind the one-dimensional reduction. Both models reproduce the measured outlet purity and production rate with no fitted parameters, and the closures they share are assessed component by component against measured bubble size and hold-up, published swarm mass-transfer data, and a second sparger configuration. Steady-state regimes are mapped over biomass, recirculation and feed rate, and intermittency analysed over forcing periods of 10–1800<ce:hsp sp=\"0.16667\"></ce:hsp>s. A 53<ce:hsp sp=\"0.16667\"></ce:hsp>s recirculation time buffers sub-minute fluctuations, so cycle-averaged purity and productivity are set by duty cycle rather than forcing period, with only the oscillation amplitude growing. When H<ce:inf loc=\"post\">2</ce:inf> varies against a steady CO<ce:inf loc=\"post\">2</ce:inf> supply, purity settles over <mml:math altimg=\"si3.svg\" display=\"inline\"><mml:mrow><mml:mo>∼</mml:mo><mml:mtext>1200</mml:mtext><mml:mspace width=\"0.16667em\"></mml:mspace><mml:mtext>s</mml:mtext></mml:mrow></mml:math>, far longer than gas-side recovery, because the dissolved inorganic-carbon pool absorbs the stoichiometric imbalance. Under biology-limited operation the biological production-rate oscillation is compressed roughly <mml:math altimg=\"si931.svg\" display=\"inline\"><mml:mrow><mml:mn>2.5</mml:mn><mml:mo>×</mml:mo></mml:mrow></mml:math> while the gas-side envelope is almost unchanged, so the gas-side rate is an unreliable proxy for biological activity. The results identify which observables can, and cannot, track reactor state under variable supply.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"8 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modification of zinc-based desulfurization sorbents via metal doping to boost desulfurization and regeneration performance","authors":"Qin Su, Xiaojun Xue, Yangjie Sun, Qiong Mo, Man Zhang, Jiancheng Wang, Jie Mi, Yu Feng","doi":"10.1016/j.cej.2026.182788","DOIUrl":"https://doi.org/10.1016/j.cej.2026.182788","url":null,"abstract":"To enhance the coal gas desulfurization and regeneration performance of zinc-based sorbents, a series of ZnO-based sorbents doped with metal ions was prepared via the sol-gel method. The effects of metal doping on the structural properties, desulfurization activity, and regeneration behavior of these sorbents were systematically investigated. The results showed that metal doping inhibited the growth of ZnO crystals, increased the specific surface area, and modified the electronic environment of Zn species, which collectively contributed to the enhanced interaction between H<ce:inf loc=\"post\">2</ce:inf>S and active sites. Among them, the Zr-doped desulfurization sorbent exhibited the highest saturation sulfur capacity of 33.07 g S/100 g sorbent, which was 2.14 times higher than that of pure ZnO. The regeneration behavior study indicated that the doping of Co, Fe, and Zr could effectively reduce the regeneration temperature of the desulfurization sorbent and improve regeneration performance. After 3 desulfurization-regeneration cycles, the saturation sulfur capacity of the Zr-doped desulfurization sorbent still reached 24.84 g S/100 g sorbent, indicating that 75.11% of its initial sulfur capacity was maintained after three regeneration cycles. This was mainly attributed to Zr doping, which enabled more complete regeneration of the desulfurization sorbent and thus facilitated the recovery of its active sites. This work not only elucidates the structure-activity relationship and mechanistic roles of metal dopants in ZnO-based sorbents but also provides a robust experimental and theoretical basis for the rational design of high-performance, regenerable sorbents for high-temperature coal gas desulfurization.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"198 1","pages":"182788"},"PeriodicalIF":15.1,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-strength and water-resistant protein bioadhesives enabled by electrocatalytic demethylation of lignosulfonate for phenol activation","authors":"Yunfeng Tao, Lanxiang Liu, Lei He, Qi Chen, Zihan Zhao, Tingzhu Song, Beibei Wei, Kamran Choupani Chaydarreh, Li Shuai, Xiaojian Zhou, Guanben Du, Bei Zhou","doi":"10.1016/j.cej.2026.182613","DOIUrl":"https://doi.org/10.1016/j.cej.2026.182613","url":null,"abstract":"Lignin is a widespread and abundant biomass resource, commonly converted into lignosulfonates during pulping and paper industries, but resulting in substantial by-product and waste. Although significant research has focused on its high-value utilization, the inherent molecular heterogeneity and polydispersity of lignin continue to hinder the development of scalable and economically feasible applications. Here, we report an electrochemical strategy using cerium(III) nitrate hexahydrate (Ce(NO<ce:inf loc=\"post\">3</ce:inf>)<ce:inf loc=\"post\">3</ce:inf>·6H<ce:inf loc=\"post\">2</ce:inf>O) to selectively demethylate sodium lignosulfonate (LS), generating reactive phenolic hydroxyl groups that enhance cross-linking with soy protein isolate (SPI) to form high-performance adhesives. This method yielded lignin fractions (LS-3 and LS-4) with high homogeneity and purity, increasing free phenolic OH content from 0.15 to 0.45 mmol·g<ce:sup loc=\"post\">−1</ce:sup>. The resulting lignin derivatives exhibited high reactivity and uniform morphology, enabling strong interactions with SPI through extensive hydrogen bonding, physical entanglement and Schiff base condensation. The final obtained lignin-protein adhesive (LPA) achieved dry and wet shear strengths of 1.94 ± 0.052 MPa and 1.05 ± 0.045 MPa (63 °C, 3 h), respectively well above the interior-grade plywood requirement of ≥0.7 MPa. This electrocatalytic approach enabled efficient lignosulfonates demethylation and integration with renewable biomass to produce sustainable, high-performance bio-based materials.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"3 1","pages":"182613"},"PeriodicalIF":15.1,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Engineering built-in electric field in NiMoO4/FeOOH heterostructures for efficient oxygen evolution reaction","authors":"Yiwen Chen, Jun Guo, Penglong Li, Buming Chen, Hui Huang","doi":"10.1016/j.cej.2026.182742","DOIUrl":"https://doi.org/10.1016/j.cej.2026.182742","url":null,"abstract":"Efficient and durable oxygen evolution reaction electrocatalysts are essential for industrial-scale hydrogen production, yet regulating electrochemical reconstruction while maintaining structural stability remains challenging. Herein, a crystalline-weakly crystalline NiMoO<ce:inf loc=\"post\">4</ce:inf>@FeOOH heterostructure is constructed to enable built-in electric field (BEF)-driven reconstruction regulation. The Fermi-level mismatch at the heterointerface induces charge redistribution and generates a polarized BEF, which directs the reconstruction pathway toward highly active NiFeOOH species while suppressing excessive structural degradation. The optimized catalyst achieves a low overpotential of 255 mV at 100 mA cm<ce:sup loc=\"post\">−2</ce:sup>, a Tafel slope of 52.1 mV dec<ce:sup loc=\"post\">−1</ce:sup>, and stable operation for 100 h in 30 wt% KOH at 80 °C, with an energy consumption of 4.84 kWh Nm<ce:sup loc=\"post\">−3</ce:sup> H<ce:inf loc=\"post\">2</ce:inf>. Operando Raman, in situ electrochemical impedance spectroscopy, and XPS analyses reveal that the BEF accelerates Ni oxidation, promotes OH<ce:sup loc=\"post\">−</ce:sup> adsorption, and facilitates interfacial charge transfer during reconstruction. Density functional theory calculations further confirm optimized oxygen intermediate adsorption and reduced reaction barriers. This work establishes a BEF-driven electrochemical reconstruction strategy for coupling interfacial electronic regulation with dynamic catalyst evolution toward high-performance OER electrocatalysts.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"7 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-anchoring crystallization modulation and defect passivation via multifunctional BTCA for 25.63%-efficiency perovskite solar cells","authors":"Fengyan Xie, Yao Huang, Chunlei Huang, Dongli Meng, Guofa Dong, Minghui Wu, Hongping Yang, Yafeng Li, Mingdeng Wei","doi":"10.1016/j.cej.2026.182701","DOIUrl":"https://doi.org/10.1016/j.cej.2026.182701","url":null,"abstract":"Organic–inorganic hybrid perovskite solar cells (PSCs) have achieved remarkable progress, yet further enhancements in efficiency and stability are required for commercialization. Herein, we introduce 4-bromo-2-thiophenecarboxylic acid (BTCA) as a multifunctional small-molecule additive to simultaneously regulate crystallization, passivate defects, and optimize energy level alignment. The carboxyl group (–COOH) coordinates with undercoordinated Pb<ce:sup loc=\"post\">2+</ce:sup>, the bromine atom fills iodine vacancies, and the thiophene ring enhances charge transport. Systematic characterizations reveal the working mechanism. BTCA delays crystallization via dual anchoring with Pb<ce:sup loc=\"post\">2+</ce:sup> and FA<ce:sup loc=\"post\">+</ce:sup>, yielding highly crystalline films with large columnar grains, reduced trap density (Urbach energy drops from 72.36 to 57.62 meV), and uniform surface potential. The modified films exhibit longer carrier lifetime (1430.63 ns vs. 1099.96 ns), suppressed non-radiative recombination, and improved energy level alignment with the electron transport layer. Consequently, BTCA-treated devices achieve a champion power conversion efficiency (PCE) of 25.63% (vs. 23.39% for the control), with increased open-circuit voltage (1.188 V) and fill factor (84.16%). Unencapsulated devices retain 81.48% of their initial efficiency after 60 days stored in the dark at 25 ± 5 °C and 15 ± 5% RH, compared to 73.20% for control. This work demonstrates a molecular design strategy for efficient and stable PSCs.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"28 1","pages":"182701"},"PeriodicalIF":15.1,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Template morphology-directed structural reconstruction of hierarchically porous poly (lactic acid) microparticles for supercritical CO₂ flow regulation","authors":"Zhengen Gao, Zihao Yang, Fengfan Zhang, Haoling Yang, Licheng Lu, Zhaoxia Dong","doi":"10.1016/j.cej.2026.182754","DOIUrl":"https://doi.org/10.1016/j.cej.2026.182754","url":null,"abstract":"Porous biodegradable polymer particles with high specific surface areas and hierarchical architectures are increasingly pursued for applications in catalysis, separation, functional carriers, and supercritical fluid technologies. Among biodegradable polymers, poly(lactic acid) (PLA) is attractive owing to its renewable origin, biodegradability, and environmental compatibility. However, fabricating PLA microparticles with high porosity, interconnected pore networks, and hierarchical structures remains challenging. Herein, hierarchically porous PLA (pPLA) microparticles were prepared via a template-assisted thermal reconstruction strategy using lamellar hydrophobic basic magnesium carbonate (HM-BMC) microspheres as sacrificial templates. The rough lamellar template induced heterogeneous PLA deposition and localized shell reconstruction during thermal treatment, generating interconnected hierarchical pore networks with a specific surface area of 375.65 m<ce:sup loc=\"post\">2</ce:sup> g<ce:sup loc=\"post\">−1</ce:sup> and a pore volume of 0.78 cm<ce:sup loc=\"post\">3</ce:sup> g<ce:sup loc=\"post\">−1</ce:sup>. Benefiting from the hierarchical pore architecture and the intrinsic affinity of PLA toward CO₂, the pPLA particles exhibited markedly improved suspension stability in supercritical CO₂ compared with hydrophobic silica particles of similar size. Micromodel flooding showed that the particles temporarily accumulated in dominant flow channels before migrating deeper after local breakthrough, continuously diverting SC-CO₂ into previously unswept regions and improving sweep efficiency. Low-field NMR core flooding further confirmed enhanced residual oil mobilization from smaller pores, resulting in higher oil recovery than that achieved with hydrophobic silica particles. These findings demonstrate that template morphology can regulate the pore architecture and transport behavior of biodegradable polymer particles, providing a promising strategy for designing functional particulate materials for particle-assisted CO₂ enhanced oil recovery and other supercritical fluid applications.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"66 1","pages":"182754"},"PeriodicalIF":15.1,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gas invasion alteration and molecular fractionation in deep petroleum systems: insights from HTHP quantitative simulation","authors":"Zhiyao Zhang, Wen Zhao, Guangyou Zhu, Zhiyong Chen, Chonghao Sun, Hua Wang, Weiyan Chen, Linxian Chi, Xi Li, Jiakai Hou, Ziguang Zhu","doi":"10.1016/j.cej.2026.182726","DOIUrl":"https://doi.org/10.1016/j.cej.2026.182726","url":null,"abstract":"Gas invasion is a key geological–geochemical process that induces compositional fractionation and phase transitions in deep petroleum accumulations. Previous studies have relied heavily on geochemical interpretations of natural oil and gas samples, resulting in an incomplete understanding of the dynamic gas invasion process and its fractionation mechanisms. Here, we designed and conducted a high-temperature high-pressure (HTHP) multi-cycle quantitative gas invasion fractionation simulation to monitor continuously progressive gas invasion alteration on black oil under ultra-deep conditions (140 °C, 75 MPa). Molecular composition changes in residual and carry-over oils at different gas invasion intensities were analyzed using GC, GC–MS and GC × GC-TOFMS. Results show that <ce:italic>n-</ce:italic>alkanes in residual oils exhibit a systematic backward shift of the peak carbon (from C<ce:inf loc=\"post\">7</ce:inf> to C<ce:inf loc=\"post\">10</ce:inf>) and selective loss of low-carbon<ce:italic>-</ce:italic>number components (&lt;C<ce:inf loc=\"post\">10</ce:inf>). Aromaticity (toluene/<ce:italic>n-</ce:italic>heptane) increases from 0.27 to 0.42, whereas paraffinicity (<ce:italic>n-</ce:italic>heptane/methylcyclohexane) decreases from 1.71 to 1.34, revealing selective fractionation between alkanes and aromatics during gas invasion. Most conventional biomarker parameters (e.g., Ts/(Ts + Tm), Pr/Ph) remain stable, whereas some terpenoid ratios (e.g., C<ce:inf loc=\"post\">24</ce:inf> tetracyclic terpane/C<ce:inf loc=\"post\">26</ce:inf> tricyclic terpane ratio) exhibit systematic opposite trends between residual and carry-over oils. Diamondoids are progressively preferentially enriched in carry-over oils, with markedly different concentration change rates among individual isomers. This simulation verifies “differential dissolution-graded fractionation” as the core mechanism for gas invasion fractionation in ultra-deep strata, governed by differences in mass transfer rates and compound-specific fractionation rates during gas invasion. Accordingly, indicators based on stable/sensitive biomarker parameter pairs and diamondoid isomer ratios were established for gas invasion intensity evaluation. This study provides both a new perspective and novel tracing tools for understanding continuous gas invasion alteration on pre-existing oil pools under HTHP conditions and holds great significance for quantitative evaluation of secondary alteration in ultra-deep petroleum systems.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"35 1","pages":"182726"},"PeriodicalIF":15.1,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-shield teamwork in supramolecular gel: In-situ formed bilayer tribofilm for advanced lubrication","authors":"Lin Fan, Jian Qin, Xuemin Sun, Ming Zhang, Yijing Liang, Qiang Chen, Shuyan Yang, Yanyan Bai, Meirong Cai","doi":"10.1016/j.cej.2026.182760","DOIUrl":"https://doi.org/10.1016/j.cej.2026.182760","url":null,"abstract":"Maintaining a sufficiently thick lubricating film under elastohydrodynamic lubrication (EHL) conditions is the core prerequisite for avoiding direct contact between the surfaces of friction pairs. Nevertheless, conventional lubricants generally suffer from slow film formation and insufficient film thickness under EHL conditions. To overcome this limitation, this paper develops a novel supramolecular gel lubricant with outstanding film-forming performance, and molecular dynamics simulations are adopted to elucidate its self-assembly mechanism: intermolecular hydrogen bonds interactions construct a network skeleton that can effectively trap base oil. This gel lubricant exhibits excellent mechanical stability and creep recovery capability, together with high phase transition and thermal decomposition temperatures. Under boundary lubrication conditions, a double-layer tribofilm consisting of iron disulfide, iron oxides and amorphous components forms on the friction surfaces. This tribofilm produces a synergistic protective effect, which drastically reduces friction and wear while improving the load-bearing capacity of the lubrication system. More importantly, the gel lubricant exhibits exceptional film-forming capability under EHL conditions, generating a significantly thicker lubricating film than previously reported lubrication systems. The interconnected three-dimensional network effectively stores the base oil and releases it progressively during operation, allowing the gel lubricant to maintain stable lubrication under varying entrainment speeds. This study provides a molecular-level design strategy for simultaneously enhancing the film-forming capability and comprehensive tribological performance of lubricants.","PeriodicalId":270,"journal":{"name":"Chemical Engineering Journal","volume":"25 1","pages":""},"PeriodicalIF":15.1,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149123231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}