Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献_第5页

Fluorine-free superhydrophobic coating on 5083 aluminum alloy with anti-corrosion and anti-icing properties 5083铝合金的无氟超疏水涂层，具有防腐、防冰性能

IF 5.4 2区化学

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-04 DOI: 10.1016/j.colsurfa.2025.138289

Mengtao Chen , Chuanbo Zheng , Binbin Zhang

{"title":"Fluorine-free superhydrophobic coating on 5083 aluminum alloy with anti-corrosion and anti-icing properties","authors":"Mengtao Chen , Chuanbo Zheng , Binbin Zhang","doi":"10.1016/j.colsurfa.2025.138289","DOIUrl":"10.1016/j.colsurfa.2025.138289","url":null,"abstract":"<div><div>The fabrication of superhydrophobic functional materials relies on the use of fluorine-containing chemical reagents, which not only pose threats to the ecological environment and human health but also significantly limit the sustainable development of materials. In this paper, we designed a fluorine-free superhydrophobic coating on 5083 aluminum (Al) alloy substrates using aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) nanoparticles, stearic acid (STA), and polydimethylsiloxane (PDMS) to achieve anti-corrosion and anti-icing properties. Surface wettability, morphology, and chemical composition analyses confirmed that the coating possesses micro-nano hierarchical structures and low surface energy. Water droplet freezing tests at −10°C and −15°C revealed that the ice formation time of the coating was 4.69 times and 1.48 times longer than that of bare 5083 Al alloy, respectively. Electrochemical impedance spectroscopy (EIS) results demonstrated that the charge transfer resistance (R<sub>ct</sub>) and low-frequency impedance modulus (|Z|<sub>0.01 Hz</sub>) of the coating increased by five orders of magnitude, indicating outstanding anti-corrosion performance. Additionally, the designed fluorine-free superhydrophobic coating maintained its superhydrophobicity after 35 sandpaper abrasion cycles and 45 tape-peeling cycles, and could be applied to diverse substrates such as copper, wood, glass, and paper, demonstrating good mechanical stability and substrate applicability.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"727 ","pages":"Article 138289"},"PeriodicalIF":5.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144997290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biofilm-resistant coating based on a self-assembling fusion protein with enhanced biocompatibility 基于增强生物相容性的自组装融合蛋白的抗生物膜涂层

IF 5.4 2区化学

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-04 DOI: 10.1016/j.colsurfa.2025.138295

Xiangxiang Wang , Ronghao Chen , Chenyi Yang , Wenping Shi , Yang Wang , Feifei Xu , Yun Liu , Haijin Xu , Guanghou Zhao , Mingqiang Qiao

{"title":"Biofilm-resistant coating based on a self-assembling fusion protein with enhanced biocompatibility","authors":"Xiangxiang Wang , Ronghao Chen , Chenyi Yang , Wenping Shi , Yang Wang , Feifei Xu , Yun Liu , Haijin Xu , Guanghou Zhao , Mingqiang Qiao","doi":"10.1016/j.colsurfa.2025.138295","DOIUrl":"10.1016/j.colsurfa.2025.138295","url":null,"abstract":"<div><div><em>Pseudomonas aeruginosa</em> is a major nosocomial pathogen that forms highly drug-resistant biofilms on biotic and abiotic surfaces, contributing to persistent infections in clinical settings. Various strategies have been developed to target different aspects of biofilm formation and generate novel functional surfaces. This study shows that an amphipathic membrane, spontaneously assembled by a fusion protein PAHG containing class I hydrophobin HGFI and pediocin PA-1, effectively reduces biofilm formation of <em>P. aeruginosa</em>. X-ray photoelectron spectroscopy confirmed the assembly of the PAHG coating, and water contact angle measurements showed increased wettability of siliconized glass. Crystal violet staining, confocal laser scanning microscopy, and scanning electron microscopy all revealed the ability of the PAHG-coated surface to reduce biofilm formation. Further investigations into the underlying mechanisms, including growth curves, twitching motility, initial adhesion, microcolony formation, and real-time PCR, indicated that the PAHG coating inhibits biofilm formation by interfering with microcolony development. Additionally, the PAHG coating demonstrated good biocompatibility with human fibroblasts and A549 cells. Finally, the PAHG coating demonstrated similar anti-biofilm effects on clinical silicone tubes, suggesting its potential for application on various materials.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"727 ","pages":"Article 138295"},"PeriodicalIF":5.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Charge-engineered lipid nanoparticles with poly (γ-glutamic acid) for improved CRISPR/Cas9 genome editing 带聚γ-谷氨酸的电荷工程脂质纳米颗粒用于改进CRISPR/Cas9基因组编辑

IF 5.4 2区化学

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-04 DOI: 10.1016/j.colsurfa.2025.138287

Meihui Zhang, Xue Gao, Hongqian Zhang, Wei Liu, Huiyuan Lv, Chuanxu Yang

{"title":"Charge-engineered lipid nanoparticles with poly (γ-glutamic acid) for improved CRISPR/Cas9 genome editing","authors":"Meihui Zhang, Xue Gao, Hongqian Zhang, Wei Liu, Huiyuan Lv, Chuanxu Yang","doi":"10.1016/j.colsurfa.2025.138287","DOIUrl":"10.1016/j.colsurfa.2025.138287","url":null,"abstract":"<div><div>Efficient delivery of CRISPR-Cas9 components via lipid nanoparticles (LNPs) holds significant promise for therapeutic gene editing, but is still hindered by inefficient intracellular trafficking and suboptimal RNA release within the cytoplasm. Herein, we report the development of a charge-engineered LNP system incorporating the anionic polymer poly(γ-glutamic acid) (PGA) to improve the co-delivery of Cas9 mRNA and single-guide RNA (sgRNA). A systematic evaluation of PGA content and molecular weight revealed a clear \"moderation principle,\" whereby both insufficient and excessive PGA impaired delivery performance due to imbalanced electrostatic interactions and compromised LNP–RNA dynamics. By optimizing the molar ratio of cationic lipids (N), mRNA (P), and PGA (C) to 25:1:1, and selecting a PGA with a molecular weight of 200 kDa, we achieved significantly enhanced endosomal escape and cytoplasmic release of RNA cargo. The optimized formulation resulted in efficient gene editing, reaching up to 70 % EGFP knockdown in HeLa reporter cells, markedly outperforming unmodified LNPs. Further mechanistic investigations demonstrated that PGA incorporation facilitated precise tuning of nanoparticle surface charge, promoting intracellular RNA unpacking and cytosol releasing. Moreover, the PGA-incorporated LNPs retained the inherent liver-targeting capability and exhibited a favorable in vivo biosafety profile. Taken together, this study provides a rational design strategy to improve CRISPR-Cas9 delivery via electrostatic tuning of multi-component LNPs, laying a robust foundation for the clinical translation of safe and effective gene-editing therapeutics.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"727 ","pages":"Article 138287"},"PeriodicalIF":5.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nose-to-brain targeting of pregabalin via phospholipid complex nanoparticles for facilitated epilepsy therapy: Design, optimization and in vitro-in vivo evaluations 通过磷脂复合物纳米颗粒将普瑞巴林鼻到脑靶向治疗癫痫：设计、优化和体内外评估

IF 5.4 2区化学

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-04 DOI: 10.1016/j.colsurfa.2025.138190

Rashmi Trivedi , Smita Bonde , Pooja Mate , Milind Umekar , Nitu Wankhede , Mohit Umare , Mohit Angolkar , Sharanya Paramshetti , Riyaz Ali M. Osmani

{"title":"Nose-to-brain targeting of pregabalin via phospholipid complex nanoparticles for facilitated epilepsy therapy: Design, optimization and in vitro-in vivo evaluations","authors":"Rashmi Trivedi , Smita Bonde , Pooja Mate , Milind Umekar , Nitu Wankhede , Mohit Umare , Mohit Angolkar , Sharanya Paramshetti , Riyaz Ali M. Osmani","doi":"10.1016/j.colsurfa.2025.138190","DOIUrl":"10.1016/j.colsurfa.2025.138190","url":null,"abstract":"<div><div>Epilepsy, a chronic neurological disorder marked by recurrent seizures, affects millions worldwide and often presents treatment challenges due to systemic side effects and limited drug penetration across the blood-brain barrier (BBB). While nose-to-brain drug delivery has emerged as a promising strategy to bypass the BBB via olfactory and trigeminal pathways, its clinical potential is constrained by poor mucosal absorption and limited nasal cavity capacity. This study introduces phospholipid–chitosan complex nanoparticles (PCNPs) as a novel intranasal delivery system to address these limitations. By combining the mucoadhesive and permeability-enhancing properties of chitosan with the biocompatibility and drug-stabilizing capacity of phospholipids, PCNPs significantly improve drug solubility, retention, and resistance to enzymatic degradation. Pregabalin, an antiepileptic drug hindered by poor BBB permeability and systemic toxicity when administered orally, was successfully encapsulated using an emulsion solvent evaporation method. The optimized PCNPs exhibited nanoscale size, sustained drug release, and strong mucoadhesion. In vivo efficacy studies in Swiss albino mice demonstrated a marked delay in myoclonic jerks following intranasal PCNP administration, outperforming conventional intraperitoneal pregabalin delivery. This work advances the field by presenting a synergistic nanoparticle-based strategy that enhances CNS targeting via the nasal route, offering a safer and more effective alternative for epilepsy treatment and setting a foundation for broader applications in neurotherapeutics.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"727 ","pages":"Article 138190"},"PeriodicalIF":5.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

N/P doping controlled dielectric modulation in biomass-derived carbon for electromagnetic waves absorption N/P掺杂控制生物质衍生碳介质调制的电磁波吸收

IF 5.4 2区化学

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-04 DOI: 10.1016/j.colsurfa.2025.138299

Youjian Chen , Lanchao Wen , Siyao Cheng , Aming Xie , Wei Dong

{"title":"N/P doping controlled dielectric modulation in biomass-derived carbon for electromagnetic waves absorption","authors":"Youjian Chen , Lanchao Wen , Siyao Cheng , Aming Xie , Wei Dong","doi":"10.1016/j.colsurfa.2025.138299","DOIUrl":"10.1016/j.colsurfa.2025.138299","url":null,"abstract":"<div><div>The atomic doping strategy utilizing carbon nanomaterials has garnered significant research interest in the field of electromagnetic wave (EMW) absorption, attributed to their tunable dielectric properties. However, the single-element doping strategy is difficult to balance the conduction loss and polarization loss, and the competitive mechanism of multi-element doping is still unclear. Moreover, the dependence on external dopants limits the flexibility of material design. Hence, this study proposes a novel strategy for the in-situ co-doping of N and P in carbon-based materials using wine lees as the raw material. The results indicate that the polarization loss dominated by N doping and the conduction loss dominated by P doping exhibit a synergistic effect. Through the thermal gradient design, the N/P doping concentration and chemical state distribution are dynamically regulated, thereby achieving a dynamic equilibrium between conduction loss and polarization loss. The sample exhibited the best EMW absorption performance (RL =-67.49 dB) with the thickness of 1.31 mm, and its effective absorption bandwidth (EAB) was significantly superior to that of traditional materials. This work offers a novel approach for the design of high-performance and lightweight EMW absorption materials.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"727 ","pages":"Article 138299"},"PeriodicalIF":5.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural modulation of bioinspired slippery surface for enhanced underwater drag reduction 结构调制的生物启发光滑表面增强水下阻力减少

IF 5.4 2区化学

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-04 DOI: 10.1016/j.colsurfa.2025.138303

Xiao Sang, Manfu Zhu, Yukai Sun, Liran Ma

{"title":"Structural modulation of bioinspired slippery surface for enhanced underwater drag reduction","authors":"Xiao Sang, Manfu Zhu, Yukai Sun, Liran Ma","doi":"10.1016/j.colsurfa.2025.138303","DOIUrl":"10.1016/j.colsurfa.2025.138303","url":null,"abstract":"<div><div>Underwater drag reduction is of great importance for reducing energy consumption, enhancing transportation efficiency, and prolonging equipment lifespan. Inspired by the pitcher plant, slippery surfaces introduce a lubricating layer at the solid-liquid interface and achieve drag reduction, but the depletion of surface oil layers easily leads to drag reduction failure. Based on a polydimethylsiloxane (PDMS) substrate, a three-dimensional interconnected porous network was constructed by incorporating thermally expandable microspheres (EM), and a porous organogel was prepared. After silicone oil impregnation, a long-lasting self-repairing slippery surface was obtained. The porous PDMS enables efficient silicone oil storage and continuous lubricant replenishment, achieving self-recovery when the oil layer is damaged. With 3 % EM content, the surface exhibits ultralow water contact angle hysteresis (1.35°) and universal repellency to multiple liquid systems. Drag reduction experiments demonstrate a maximum drag reduction rate of 19.7 %, whereas the slippery surface with 9 % EM content shows a maximum drag increase of 5.4 % due to its insufficient oil film retention capability. This study provides a new perspective for the research on underwater drag reduction materials.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"727 ","pages":"Article 138303"},"PeriodicalIF":5.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reconfiguration and energy change of droplets at micro- and nano-limited domain interfaces under the synergistic regulation of electric and thermal fields 电场和热场协同调节下微纳受限界面液滴的重构和能量变化

IF 5.4 2区化学

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-04 DOI: 10.1016/j.colsurfa.2025.138288

Kai Guo , Haoran Wang , Ling Du , Yuling Lü , Xiaoming Luo

{"title":"Reconfiguration and energy change of droplets at micro- and nano-limited domain interfaces under the synergistic regulation of electric and thermal fields","authors":"Kai Guo , Haoran Wang , Ling Du , Yuling Lü , Xiaoming Luo","doi":"10.1016/j.colsurfa.2025.138288","DOIUrl":"10.1016/j.colsurfa.2025.138288","url":null,"abstract":"<div><div>Through the synergistic action of electric and thermal fields, the dynamic viscosity of thick oil can be reduced and the properties of the oil-water interface can be changed, which has attracted extensive attention in the neighborhood of realizing efficient demulsification and strengthening the efficiency of oil-water separation. However, the mechanism of the enhancement of emulsion breaking by the reconfiguration and energy changes of droplets in the micro- and nano-constrained domains is still unclear. In this study, through molecular dynamics (MD) simulations, a comparative analysis was conducted on the energy changes and motion paths of droplets in the micro-nano confinement domain at the nanoscale under a single thermal field and an electro-thermal coupled field. The results show that as the temperature increases from 300 K to 700 K, the frequency of covalent bonds breaking accelerates, the size of water molecule clusters decreases and tends to be dispersed, and the oil-water interface takes on a multilayer mixed state; The coupling effect of an applied alternating current (AC) electric field and a 300 K temperature field causes a greater amplitude of dynamic fluctuations in the system's energy distribution. This effect plays a key role in droplet deformation and the reconstruction of interfacial structures, effectively weakening the strength of the interfacial film formed by resin adsorption and reducing the electric field strength required for the system's demulsification. Therefore, by choosing a suitable combination of electric field strength and temperature, the regulation of droplet dispersed-phase stability and energy distribution characteristics can be realized, and the emulsion breaking and oil-water separation efficiency can be enhanced.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"727 ","pages":"Article 138288"},"PeriodicalIF":5.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regulate surface oxygen vacancies and oxygen migration in Fe-based carriers via tungstate-modified for oxidative dehydrogenation of ethane with low COx selectivity 利用低COx选择性钨酸盐修饰乙烷氧化脱氢，调节铁基载体表面氧空位和氧迁移

IF 5.4 2区化学

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-04 DOI: 10.1016/j.colsurfa.2025.138291

Xiaoyan Wu , Yuncai Song , Jilong Li , Weishan Yao , Yecheng Yao , Xixian Yang , Zhen Huang , Guoqiang Wei , Firuza Rakhmatkarieva , Odina Davlatova

{"title":"Regulate surface oxygen vacancies and oxygen migration in Fe-based carriers via tungstate-modified for oxidative dehydrogenation of ethane with low COx selectivity","authors":"Xiaoyan Wu , Yuncai Song , Jilong Li , Weishan Yao , Yecheng Yao , Xixian Yang , Zhen Huang , Guoqiang Wei , Firuza Rakhmatkarieva , Odina Davlatova","doi":"10.1016/j.colsurfa.2025.138291","DOIUrl":"10.1016/j.colsurfa.2025.138291","url":null,"abstract":"<div><div>To address the issues of low C<sub>2</sub>H<sub>4</sub> yield and high CO<sub>x</sub> selectivity in ethane oxidative dehydrogenation over spinel ferrites, tungstate-modified iron-based oxygen carriers were firstly constructed via sol-gel and impregnation methods. Characterization revealed that the strong electronic interaction between WO<sub>4</sub><sup>2⁻</sup> and surface Fe/Ni sites of NiFe<sub>2</sub>O<sub>4</sub> facilitated electron transfer and oxygen vacancy generation. Simultaneously, alkali metal ion weakened bridging oxygen bonds, further increasing oxygen vacancy concentration. These effects collectively promoted the formation of oxygen vacancies and modulated oxygen migration and redox properties of the oxygen carrier. Na<sub>2</sub>WO<sub>4</sub>-modified NiFe<sub>2</sub>O<sub>4</sub> exhibited a moderate concentration of oxygen vacancies, promoting desorption of ethylene rather than over-oxidation to CO<sub>x</sub>. Under the reaction conditions of 750°C，this oxygen carrier achieved the best balance between oxygen migration and redox performance, achieving 34.6 % ethylene yield with CO<sub>x</sub> selectivity as low as 1.1 %. Moreover, all oxygen carriers demonstrated excellent CO<sub>2</sub> conversion (>90 %) during subsequent CO<sub>2</sub> splitting. Kinetic experiments further confirmed the bulk diffusion coefficient D of the NiFe<sub>2</sub>O<sub>4</sub> modified by Na<sub>2</sub>WO<sub>4</sub> decreased by approximately 93 % compared to NiFe<sub>2</sub>O<sub>4</sub>, making the release of oxygen more aligned with the reaction. This study demonstrates a defect and support engineering strategy to precisely regulate oxygen vacancies and lattice oxygen migration, offering new insights into designing high performance oxygen carrier.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"727 ","pages":"Article 138291"},"PeriodicalIF":5.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selective depression of dolomite in magnesite flotation using a novel chelating depressant MGDA: Adsorption mechanism and DFT calculations 新型螯合抑制剂MGDA对菱镁矿浮选中白云石的选择性抑制：吸附机理及DFT计算

IF 5.4 2区化学

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-04 DOI: 10.1016/j.colsurfa.2025.138300

Haoran Sun , Gui Gao , Yulian Wang , Yishen Sun , Zining Guo

{"title":"Selective depression of dolomite in magnesite flotation using a novel chelating depressant MGDA: Adsorption mechanism and DFT calculations","authors":"Haoran Sun , Gui Gao , Yulian Wang , Yishen Sun , Zining Guo","doi":"10.1016/j.colsurfa.2025.138300","DOIUrl":"10.1016/j.colsurfa.2025.138300","url":null,"abstract":"<div><div>Due to its similar chemical properties to magnesite, dolomite tends to float together when separating the two. In this experiment, Methyl Glycine Diacetic Acid (MGDA) was used as a depressant for the flotation separation of magnesite and dolomite. The flotation experiment showed that good separation of magnesite and dolomite can be achieved under the conditions of MGDA dosage of 150 mg/L and NaOL dosage of 100 mg/L. Wettability analysis and Zeta potential measurement indicate that MGDA can significantly alter the hydrophobicity of dolomite and inhibit the adsorption of NaOL on dolomite. Infrared (IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) analyses confirm that MGDA pre-adsorbs on dolomite's calcium sites. This prevents NaOL from adsorbing on dolomite, restricting its activity to magnesite. Atomic force microscope (AFM) analysis shows that the adsorption of MGDA on the surface of dolomite significantly increases its surface roughness, while there is no change on the surface of magnesite. Density Functional Theory (DFT) calculations showed that the adsorption energy of MGDA on the surface of dolomite was stronger than that of magnesite, which weakened the bonding force between dolomite and the bubbles and inhibited the upward movement of dolomite. Based on the above research, MGDA can be used as an efficient chelate depressant for removing dolomite from magnesite.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"727 ","pages":"Article 138300"},"PeriodicalIF":5.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D PAN/LLZTO nanofibers reinforced composited polymer electrolyte for high-performance solid-state lithium metal batteries 高性能固态锂金属电池用三维PAN/LLZTO纳米纤维增强复合聚合物电解质

IF 5.4 2区化学

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-09-04 DOI: 10.1016/j.colsurfa.2025.138292

Honggang He , Rui Wang , Qunren Qiu , Min Li , Shi Chen , Yuxin Tang , Yu Feng , Huaiyu Shao , Ruiqing Li , Chunyan Cao , Bin Fei , Mingzheng Ge

{"title":"3D PAN/LLZTO nanofibers reinforced composited polymer electrolyte for high-performance solid-state lithium metal batteries","authors":"Honggang He , Rui Wang , Qunren Qiu , Min Li , Shi Chen , Yuxin Tang , Yu Feng , Huaiyu Shao , Ruiqing Li , Chunyan Cao , Bin Fei , Mingzheng Ge","doi":"10.1016/j.colsurfa.2025.138292","DOIUrl":"10.1016/j.colsurfa.2025.138292","url":null,"abstract":"<div><div>Solid-state lithium metal batteries (SSLMBs) utilizing polymer electrolytes are regarded as highly promising for enhancing energy density and addressing safety concerns. However, their widespread applications are constrained by low ionic conductivity and inadequate mechanical properties. To overcome these limitations, this work introduces a flexible PEO/PAN/LLZTO composite solid electrolyte (PPL) fabricated via sequential electrospinning and hot-pressing technique. The PAN/LLZTO nanofibrous backbone establishes rapid Li⁺ transport pathways and significantly improve the mechanical integrity of the composite. Consequently, the PPL electrolyte achieved a remarkable ionic conductivity of 6.46 × 10<sup>−4</sup> S cm<sup>−1</sup> alongside an impressive tensile strength of 8.79 MPa. Crucially, the spontaneous formation of inorganic LiF and Li<sub>3</sub>N compounds at the electrolyte/Li interface promotes uniform Li⁺ deposition, enhances interfacial wettability, and effectively suppresses dendrite growth, thereby preventing short circuits. This superior interfacial stability is evidenced by symmetric cells operating stably for over 7000 h at 0.1 mA cm<sup>−2</sup>/0.1 mAh cm<sup>−2</sup>. Furthermore, the full cells delivered a discharge specific capacity of 163.2 mAh g<sup>−1</sup> at 0.1 C and demonstrated exceptional cycling stability, retaining 79.6 % capacity after 800 cycles at 1.0 C.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"727 ","pages":"Article 138292"},"PeriodicalIF":5.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0