CHEMICAL ENGINEERING JOURNAL
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2015
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IF 4.321
Lu Qi,Xianghai Meng,Rui Zhang,Haiyan Liu,Chunming Xu,Zhichang Liu,Peter A.A. Klusener
Droplet size distribution (DSD) and mean droplet size of chloroaluminate ionic liquid (IL)–heptane dispersion in a stirred vessel were investigated as a model system for the composite ionic liquid/hydrocarbon system applied in the commercial isobutane alkylation process. Focused beam reflectance measurement was used to identify the phase inversion, and particle video microscope (PVM) was employed to measure the DSD of IL-continuous dispersions. The effects of agitation speed and dispersed phase holdup on the DSD and mean droplet size were investigated. Phase inversion was found at a heptane hold-up of just above 0.5. The observed DSDs could be described well by logarithmic normal distributions in spite of variable operating conditions. The DSDs appeared to be more or less independent of the dispersed phase holdup ( ϕ heptane ⩾ 0.3) at the same agitation speed. A semi-empirical correlation based on Shinnar theory was proposed to predict the droplet mean size in the impeller region for the IL-continuous dispersion, and the predicted value agreed well with the experimental data. This work will be a good basis to predict the dispersion behavior under process conditions.
研究领域:
化学工程
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流体力学
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多相系统
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过程工程
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胶体与界面科学
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2017
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IF 2.726
Ying Zhang,Xinxin He,Yutian Chen,Maogang He
The mutual diffusion coefficients of n -butanol + n -heptane and n -pentanol + n -heptane were measured over the mass fraction of n -butanol or n -pentanol from 0.05 to 0.95 at intervals of 0.10 and the temperatures 288.15 K, 298.15 K, 308.15 K and 318.15 K at 0.101 MPa. The measurements were carried out using a digital holographic interferometry system. The expanded relative uncertainty of the mutual diffusion coefficients was estimated to be less than 2.4%. The influences of temperature and composition on the mutual diffusion coefficients were investigated. Moreover, equations for the mutual diffusion coefficients of the two binary mixtures were fitted to the data as functions of mass fraction and temperature. The correlations represent the data with the absolute average of relative deviations (AARDs) of 1.1% for n -butanol + n -heptane and 0.77% for n -pentanol + n -heptane, respectively.
研究领域:
物理化学
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热力学
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传递现象
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溶液化学
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流体混合物
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2026
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IF 6
Shen Yan,Eric Brendle,Mengyuan Li,Shengyu Zhang,Xiao Dong Chen,Winston Duo Wu
Spray drying and spray freeze drying induce distinct particle structure. • IGC is highly effective in resolving molecular-level surface characteristics. • IGC-ID reveals surface leucine enrichment and elevated dispersive energy. • IGC-FC quantifies hydrophilic site reduction and maps polar surface areas. • Surface energetics serve as a quantitative predictor for wetting and release. The unpredictable wettability of pharmaceutical microparticles, often stemming from complex phase transitions during processing, frequently eludes conventional unidimensional assessments of surface hydrophilicity. In this study, mannitol-leucine microparticles were fabricated via spray drying and spray freeze drying. Their structural properties—including morphology, particle size, and polymorphism—were systematically correlated with surface energetics (dispersive energy, acid–base characteristics, and hydrophilic site distribution) as delineated by inverse gas chromatography (IGC). Increasing leucine content induced pronounced surface wrinkling, sustained crystalline stability, and resulted in larger particle sizes in spray-dried samples. Conversely, spray-freeze-dried particles maintained a relatively uniform morphology but exhibited unstable δ-mannitol polymorphs with enhanced dispersibility. IGC analysis uncovered that leucine enrichment elevated dispersive surface energy, attenuated surface basicity, and diminished the hydrophilic surface area, with these effects being more pronounced in the spray-dried samples. Crucially, both the absolute hydrophilic surface area and the fractional distribution of hydrophilic domains were identified as key determinants modulating particle wettability and release behavior. This study highlights the capacity of IGC to resolve multiparametric surface energetics, thereby advancing the mechanistic understanding of pharmaceutical particle wettability through non-invasive, high-precision characterization. Download: Download high-res image (129KB) Download: Download full-size image
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Advanced Optical Materials
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2026
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IF 7.2
Boxi Meng,Yunqi Wang,Yan Fang,Ke Cheng,Xiaohong Jiang,Zuliang Du
A high-quality quantum dots (QDs) layer is crucial for the commercialization of quantum dot light-emitting diode (QLED) devices. However, current fabrication techniques cannot simultaneously achieve monolayer coverage, ordered arrangement, and large-area scalability. Herein, we develop a novel strategy of continuous stepwise self-assembly for QDs monolayer integrated the air-liquid interfacial assembly technology with continuous line-ink-supply and Langmuir-Schaefer (LS) technology, which the QDs can be finely to assemble into large area ordered and dense QDs monolayer film at the trailing edge of the flow. The ordered QD monolayers can be repeatedly transferred and stacked to accurately control the thickness of the luminescent layer in QLED devices. Green QLED based on this monolayer film reaches a high EQE of 23.85%. Furthermore, the optimized trilayer device exhibits negligible efficiency roll-off, retaining an EQE above 18% and a luminous efficacy of 60 lm W −1 at a luminance of 200 000 cd m −2 . This methodology also shows preliminary scalability potential. We achieved a trial fabrication of large-area QD films of 210 cm 2 and further constructed corresponding QLED devices with an emission area of 1.5 cm × 1.5 cm as an initial exploration.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Yuxin Tong,Jie Qi,Baogang Wang,Hongsheng Lu
Efficiently cleaning waste oil-based mud using microemulsions while avoiding secondary pollution from surfactants is a huge challenge. Surfactant-free microemulsions (SFMEs) may provide a potential solution to this issue. In this work, a series of hydrophobic deep eutectic solvents (HDESs) were prepared by mixing valproic acid and 4-methoxyphenol. All obtained HDESs displayed reversible phase-switching behavior upon stimulation with NaOH and CO 2 . One of HDESs achieved the fastest phase transition response time of 2.15 min and a peak regeneration efficiency of 98.67%. Accordingly, this optimal HDES was chosen to prepare surfactant-free microemulsions (SFMEs) featuring three distinct structures: oil-in-water, bicontinuous, and water-in-oil (W/O). These SFMEs exhibited NaOH/CO 2 -responsive solubilization behavior toward n-heptane, a model oil, and were subsequently used to wash waste mud. The W/O microemulsion achieved the highest total petroleum hydrocarbon (TPH) removal rate of 96%, attributed to its minimal interfacial tension at the oil phase and the lowest contact angle on the solid surface. Response surface methodology was used to optimize W/O microemulsion washing parameters, affording a peak TPH removal efficiency of 97.37%. GC–MS analysis revealed that the composition of the recovered TPH closely resembled that of the original TPH, demonstrating its potential for reuse in formulating oil-based mud. Importantly, these microemulsions can be efficiently regenerated through CO 2 bubbling after washing and TPH release, enabling their sustainable utilization. This strategy offers a promising solution for the effective and sustainable washing of a broader range of oily solid wastes.
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POLYMER DEGRADATION AND STABILITY
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2026
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IF 8.1
Shuming Liu,Kaixiong Zhao,Xianhao Mao,Xu Chang,Yuan Hu,Weizhao Hu,Yanbei Hou
Polylactic acid (PLA) is attractive for fused deposition modeling (FDM), yet its structural use is constrained by the coupled challenges of flammability, additive-induced embrittlement, and printed-part reliability. Herein, a material–structure integrated strategy is proposed by coupling a biomass-derived phosphorus–carbon flame-retardant formulation with multi-material FDM and beetle elytra-inspired cellular design. Epoxidized soybean oil-modified orange peel powder (EOP) was combined with ammonium polyphosphate (APP) to construct a synergistic flame-retardant PLA system, in which the optimized A20E10 formulation containing 20 wt% APP and 10 wt% EOP achieved an LOI of 34%, a UL-94 V-0 rating, and a reduced THR of approximately 30 MJ m −2 through APP-catalyzed carbonization and EOP-assisted compact char formation. To decouple fire protection from load-bearing function, A20E10 was extruded into flame-retardant PLA (fr-PLA) filament and spatially printed with neat PLA into a beetle elytra-inspired fr-PLA/PLA/fr-PLA sandwich honeycomb architecture. The resulting biomimetic structure spatially positions flame-retardant fr-PLA in the outer protective regions while retaining neat PLA as the mechanically supportive core, with the honeycomb geometry contributing to heat-transfer regulation and load dispersion. In this manner, the intrinsic flame-retardant function of A20E10 is deployed at the structural level without uniformly incorporating flame-retardant additives throughout the entire component. This work establishes a sustainable additive-manufacturing route for lightweight fire-safe PLA components with spatially programmed material functions.
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CHEMICAL ENGINEERING SCIENCE
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2026
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IF 5.1
Kang Zhou,Shuda Liu,Shoutian Qiu,Lei Wang,Xiang Ying,Ruofan Jiang,Yifei Rui,Daiwen Li,Yong Wang
The separation of ethanol from dilute aqueous solutions, such as fermentation broths, is critically important for biofuel production. Membrane distillation (MD) with porous membranes usually suffers from insufficient selectivity, while pervaporation (PV) with dense films is inadequate in permeability. To overcome this trade-off, we developed a novel hydrophobic membrane via the selective swelling of a polystyrene- b -polydimethylsiloxane- b -polystyrene triblock copolymer (SDS). By precisely controlling the swelling agent and duration, we engineered the optimal membrane with a tailored pore structure featuring interconnected nanopores and partially blind pores, along with a PDMS-enriched pore surface. This unique architecture enables a multipath permeation mechanism combing solution-diffusion and the transport pathway for molecules under vapor–liquid equilibrium within pore channels. The optimized membrane demonstrated an exceptional combination of high permeation flux and separation factor for a 5 wt% ethanol/water mixture at 50 °C, yielding a remarkable pervaporation separation index (PSI) of 38.2 kg·m −2 ·h −1 . This performance surpasses many PDMS-based PV and conventional MD membranes. This work presents a simple and efficient strategy for fabricating high-performance membranes that simultaneously achieve high flux and selectivity, offering significant potential for advancing energy-efficient bioethanol recovery processes.
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Journal of Coatings Technology and Research
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2026
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IF 3.4
Zhang Guofa,Sun Qianqian,Li Bing,Wu Bo,Ding Wei,Wang Litao,Lv Mei
Silicone rubber exhibits inherent hydrophobicity and poor lubrication performance in aqueous environments, limiting its application in medical devices. To address this challenge, we developed a thermosetting lubricating coating by incorporating polyvinylpyrrolidone (PVP) into a polyurethane-based binder system enhanced with silane coupling agent (APTES) to improve adhesion. The coating was applied to silicone rubber substrates pretreated with heptane to ensure uniform and firm attachment. Its performance was evaluated through comprehensive characterization including FTIR, SEM, EDS, contact angle measurements, tribological tests, and antibacterial assays. Results demonstrated that a PVP concentration of 3% yielded optimal wettability, reducing the water contact angle from 102.6° to 57.3° and achieving a low friction coefficient of 0.17, outperforming commercial lubricating coatings. Furthermore, iodine loading significantly enhanced short-term antibacterial efficacy, with bactericidal rates reaching 96.7% against Escherichia coli and 97.8% against Staphylococcus aureus . Although iodine release limits long-term antibacterial performance, the PVP matrix itself exhibits durable intrinsic antibacterial activity. This study presents a dual-functional coating that combines excellent lubrication and antibacterial properties, offering a promising solution for surface modification of silicone rubber-based medical devices.
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Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 5
·124157
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IF 7.5
Junyi Shi,Hongjuan Wang,Peng Liu,Dehai Yu,Dandan Ji
PLA-based composite aerogels with high oil selectivity, good reusability, and gravity-driven transport capability are promising materials for oily-water treatment and spill remediation. However, many high-performance oil/water separation aerogels still rely on non-degradable matrices or fluorinated surface modifiers. Herein, ZIF-71 nanoparticles were incorporated into a polylactic acid (PLA) aerogel to construct a hydrophobic capillary-gating network through solution blending, water-assisted thermally induced phase separation, liquid-nitrogen freezing, and freeze-drying. The chlorinated imidazolate framework contributed hydrophobic/oleophilic domains, polyhedral roughness, and textural porosity, while the PLA matrix provided a lightweight biodegradable skeleton. Compared with pristine PLA, the optimized PZ71–3 aerogel increased the water contact angle from 114° to 136°, tensile strength from 0.088 to 0.166 MPa, elongation at break from 10% to 25%, and total pore volume from 0.0066 to 0.0091 cm³ g⁻¹ , while showing a BJH average pore diameter of 10.8 nm. The aerogel resisted a water head of 14.5 cm, selectively captured both floating heptane and sinking CCl₄, achieved oil recovery efficiencies of 98.2–99.2% with gravity-driven oil fluxes of 5300–17,200 L m⁻² h⁻¹ , and retained stable oil sorption capacity and flux over 20 cycles. Comparative benchmarking shows that PZ71–3 offers a balanced performance profile among MOF/polymer and biodegradable-polymer aerogels. This work demonstrates ZIF-71-induced hydrophobic capillary gating as an effective fluorine-free strategy for recyclable PLA-based sorbents for oil/water separation.
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JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Yanqing Qu,Jiahao Li,Xiaoyu Du,Hongge Jia,Jingyu Xu
With the acceleration of industrialization, oily wastewater poses a serious threat to the ecological environment. Membrane separation technology has emerged as a research hotspot due to its advantages of high efficiency and energy savings; however, membrane fouling significantly restricts its long term stable operation. This study introduces a 3D COFs/MXene composite membrane with photocatalytic self–cleaning capability for highly efficient oil–water separation. A well dispersed 3D COFs colloidal dispersion was prepared via oil–oil–water three phase interfacial polymerization, effectively overcoming the dispersion challenges of COFs materials. Ti 3 C 2 T x MXene nanosheets were synthesized using the LiF/HCl etching method. Using intermolecular hydrogen bonding, the two components were ultrasonically assembled, and a COFs/MXene composite membrane was fabricated via vacuum assisted filtration. The membrane exhibits excellent hydrophilicity (water contact angle as low as 54.3°) and underwater oleophobicity (underwater oil contact angle up to 144.9°). Under visible light irradiation, the MXene component generates reactive oxygen species (·O 2 − and ·OH), enabling photocatalytic degradation of oil contaminants adsorbed on the membrane surface and thereby imparting self–cleaning functionality. Separation performance tests reveal that the composite membrane achieves efficient separation of various oil–in–water emulsions, with a maximum water flux of 1918.9 L m −2 h −1 bar −1 . The flux for n –hexane emulsion increased to 2.1 times that of pure MXene membrane, while maintaining a rejection rate above 98.8%. Moreover, the membrane demonstrates excellent cycling stability and photocatalytic antifouling performance. This research offers a novel strategy for developing self–cleaning separation membranes and holds promising potential for application in oily wastewater treatment.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Haijun Wu,Shenggui Ma,Dianhang Wei,Yaolin Wang,Quanwei Lv,Ziheng Jin,Xinrui Wang,Xin Tu,Xia Jiang
A strategy for plasma-coupled O v -rich catalytic hydrogen production is proposed. • The catalyst shows high activity and universality for hydrogen production. • Synergistic cascade from plasma dissociation to catalytic surface reforming. • The key mechanism of “hydrogen promotion and anti-coking” were revealed. Hydrogen production from plastics contributes to the circular economy by enabling both waste valorisation and green energy generation. Integrated pyrolysis-plasma catalytic technology offers notable advantages in improving hydrogen production, but it still faces challenges such as catalyst coking and limited understanding of the reaction mechanisms. This study proposes a water vapor plasma-coupled oxygen vacancy-rich (O v -rich) catalytic strategy to systematically investigate the improved hydrogen production from plastics over an anti-coking catalyst. The results show that the O v -rich catalyst exhibits outstanding hydrogen production activity, strong synergistic effect, and universality in the non-thermal plasma catalytic (NTP-C) reforming reaction of mixed model compounds in plastic pyrolysis oil. Crucially, its practical effectiveness was successfully validated in the NTP-C reforming of polyethylene (PE)/polypropylene (PP) pyrolysis oils. Moreover, the O v -rich catalysts significantly inhibited coking and maintained good stability for 1800 min in a multi-component mixed system. The mechanisms of hydrogen production and coking inhibition were revealed via Density Functional Theory (DFT) calculations, in situ plasma-coupled Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS), and Optical Emission Spectroscopy (OES). A synergistic reaction pathway, coupling plasma gas-phase dissociation with catalytic surface reforming, was identified as a key mechanism for enhancing hydrogen yield in plasma-catalytic systems. The study offers valuable insights for advancing plasma-assisted hydrogen production technologies. Download: Download high-res image (150KB) Download: Download full-size image
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DESALINATION
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2026
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IF 9.9
Huan Qin,Fei Guo,Shiyu Xiao,Xiaobin Jiang,Xiaoming Yan,Gaohong He,Jianquan Luo,Xuehua Ruan
Coordination-induced reconstruction enables high-flux PU NF membranes. • Zr 4+ selectively disrupts hydrogen-bonding networks in PU layer. • Spatial reconstruction creates free volume while preserving selectivity. • 21% higher permeance with >95% rejection under acidic conditions. • Decouples permeability–stability trade-off via simple post-modification. Polyurea membranes exhibit exceptional acid-base tolerance due to their densely cross-linked structure and extensive hydrogen-bonding network, making them attractive for separations under extreme pH conditions. However, the tightly associated network also leads to limited free volume, resulting in low water permeability that hinders practical applications. Herein, we report a permeance-enhanced polyurea nanofiltration membrane fabricated via coordination-induced structural reconstruction. By introducing Zr 4+ into the polyurea network, coordination interactions with urea groups partially disrupt interchain hydrogen bonding, leading to network loosening and additional free volume. As a result, the water permeance is increased by 21% without compromising selectivity. Meanwhile, incorporation of Zr 4+ enhances membrane hydrophilicity and surface positive charge, which therefore improves antifouling properties and promotes the rejection of heavy metal ions. Importantly, the reconstructed membrane retains excellent acid resistance, maintaining a stable salt rejection above 95% over 720 h. This work provides a simple yet effective strategy to overcome the permeability-stability trade-off in polyurea membranes and offers new insights into coordination-mediated regulation of polymer network structures for high-performance separations under harsh conditions. Download: Download high-res image (175KB) Download: Download full-size image
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危险品化学品经营许可证（带存储）