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Probing the Interfacial Forces and Surface Interaction Mechanisms in Petroleum Production Processes

Engineering 2022年第11期18卷 49-61页

作者： Diling Yang xuwen peng Qiongyao peng Tao Wang Chenyu Qiao Ziqian Zhao Lu Gong Yueliang Liu Hao Zhang Hongbo Zeng Department of Chemical and Materials Engineering University of AlbertaEdmontonAB T6G 1H9Canada College of Petroleum Engineering China University of PetroleumBeijing 102249China

Despite the advances that have been made in renewable energy over the past decade,crude oil or petroleum remains one of the most important energy resources to the *** production presents many challenging issues,such as the destabilization of complex oil-water emulsions,fouling phenomena on pipelines and other facilities,and water *** problems are influenced by the molecular forces at the oil/water/solid/gas interfaces involved in relevant ***,we present an overview of recent advances on probing the interfacial forces in several petroleum production processes(e.g.,bitumen extraction,emulsion stabilization and destabilization,fouling and antifouling phenomena,and water treatment)by applying nanomechanical measurement technologies such as a surface forces apparatus(SFA)and an atomic force microscope(AFM).The interaction forces between bitumen and mineral solids or air bubbles in the surrounding fluid media determine the bitumen liberation and flotation efficiency in oil sands *** stability of complex oil/water emulsions is governed by the forces between emulsion drops and particularly between interface-active species(e.g.,asphaltenes).Various oil components(e.g.,asphaltenes)and emulsion drops interact with different substrate surfaces(e.g.,pipelines or membranes),influencing fouling phenomena,oil-water separation,and wastewater *** these intermolecular and interfacial forces has advanced the mechanistic understanding of these interfacial interactions,facilitating the development of advanced materials and technologies to solve relevant challenging issues and improve petroleum production *** challenges and suggestions on future research directions in the field are also presented.

关键词： Intermolecular and surface forces Interface Emulsion Colloids Fouling and antifouling Water treatment

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Stretchable, compressible, and conductive hydrogel for sensitive wearable soft sensors

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JOURNAL OF COLLOID AND INTERFACE SCIENCE 2022年 618卷 111-120页

作者： peng, xuwen Wang, Wenda Yang, Wenshuai Chen, Jingsi peng, Qiongyao Wang, Tao Yang, Diling Wang, Jianmei Zhang, Hao Zeng, Hongbo Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada Taiyuan Univ Sci & Technol Heavy Machinery Engn Res Ctr Educ Minist Taiyuan 030024 Peoples R China

Conductive hydrogels hold great promises in wearable soft electronics. However, the weak mechanical properties, low sensitivity and the absence of multifunctionalities (e.g., self-healing, self-adhesive, etc.) of the conventional conductive hydrogels limit their applications. Thus, developing multifunctional hydrogels may address some of these technical issues. In this work, a multifunctional conductive hydro gel strain sensor is fabricated by incorporating a conductive polymer Poly(3,4-ethylenedioxythiophene)poly(styrenesulfonate) (PEDOT: PSS) into a mechanically robust poly (vinyl alcohol) (PVA)/ poly (acrylic acid) (PAA) double network (DN) hydrogel. The as-prepared hydrogel sensor could span a wide spectrum of mechanical properties by simply tuning the polymer composition and the number of freezing-thawing cycles. In addition, the dynamic hydrogen bonding interactions endow the hydrogel sensor with self healing property and reversible adhesiveness on diverse substrates. Moreover, the hydrogel sensor shows high sensitivity (Gauge Factor from 2.21 to 3.82) and can precisely detect some subtle human motions (e.g., pulse and vocal cord vibration). This work provides useful insights into the development of conductive hydrogel-based wearable soft electronics.(c) 2022 Elsevier Inc. All rights reserved.

关键词： Conductive hydrogel Interfacial interaction Self-healing Soft hydrogel sensors

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Probing Hydrophobic Interactions between Polymer Surfaces and Air Bubbles or Oil Droplets: Effects of Molecular Weight and Surfactants

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LANGMUIR 2022年第17期38卷 5257-5268页

作者： Yang, Diling Xie, Lei Mao, Xiaohui Gong, Lu peng, xuwen peng, Qiongyao Wang, Tao Liu, Qi Zeng, Hongbo Zhang, Hao Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada

Hydrophobic interaction plays an important role innumerous interfacial phenomena and biophysical and industrial processes. In this work, polystyrene (PS) was used as a modelhydrophobic polymer for investigating its hydrophobic interactionwith highly deformable objects (i.e., air bubbles and oil droplets) inaqueous solutions. The effects of polymer molecular weight,solvent (i.e., addition of ethanol to water), the presence of surface-active species, and hydrodynamic conditions were investigated, viadirect surface force measurements using the bubble/drop probeatomic force microscopy (AFM) technique and theoreticalcalculations based on the Reynolds lubrication theory andaugmented Young-Laplace equation by including the effect ofdisjoining pressure. It was found that the PS of low molecularweight (i.e., PS590 and PS810) showed slightly weaker hydrophobic interactions with air bubbles or oil droplets, as compared toglassy PS of higher molecular weight (i.e., PS1110, PS2330, PS46300, and PS1M). The hydrophobic interaction between PS and airbubbles in a 1 M NaCl aqueous solution with 10 vol % ethanol was weaker than that in the bare aqueous solution. Such effects onthe hydrophobic interactions are possibly achieved by influencing the structuring/ordering of water molecules close to thehydrophobic polymer surfaces by tuning the surface chain mobility and surface roughness of polymers. It was found that the additionof three surface-active species, i.e., cetyltrimethylammonium chloride (CTAC), Pluronic F-127, and sodium dodecyl sulfate (SDS),to the aqueous media could suppress the attachment of the hydrophobic polymer and air bubbles or oil droplets, most likely causedby the additional steric repulsion due to the adsorbed surface-active species at the bubble/polymer/oil interfaces. Our results haveimproved the fundamental understanding of the interaction mechanisms between hydrophobic polymers and gas bubbles or oildroplets, with useful implications on developing effective me

关键词： Atmospheric chemistry Bubbles Liquids Molecular mechanics Solution chemistry

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Hydrogen-Bonding-Driven Multifunctional Polymer Hydrogel Networks Based on Tannic Acid br

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ACS APPLIED POLYMER MATERIALS 2022年第3期4卷 1836-1845页

作者： Gao, Yongfeng peng, xuwen Wu, Qiuqiu Yang, Diling Wang, Wenda peng, Qiongyao Wang, Tao Wang, Jianmei Liu, Jifang Zhang, Hao Zeng, Hongbo Guangzhou Med Univ Affiliated Hosp 5 Guangzhou 510700 Guangdong Peoples R China Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada Taiyuan Univ Sci & Technol Heavy Machinery Engn Res Ctr Educ Minist Taiyuan 030024 Shanxi Peoples R China

A hydrogel network based on noncovalent inter-molecular interactions via mixing of poly(methyl vinyl ether-alt-maleic anhydride) (PMVEMA), poly(vinyl alcohol) (PVA), andtannic acid (TA) aqueous solutions was developed. Thecoacervation and hydrogel formation process is driven by hydro-gen-bonding interactions between catechol moieties of TA,hydroxide groups of PVA, and carboxylic acid groups of *** formation of the PMVEMA-PVA-TA (PPTA) gel occurs inseconds and can be readily obtained and scaled up in both ionic andnonionic systems. It is noteworthy that this PPTA gel can bestretched more than 135 times its original size and for potentialpreparation of mechanically strongfibers. The gel can be alsoremodeled on diverse substrates and into different shapes. The electrical response sensing behavior promotes the PPTA gel materialas a great candidate for fabricating strain sensors. The as-prepared PPTA gel exhibits excellent adhesion to different substrates andshows antibacterial properties against bothEscherichia coli(Gram-negative) bacteria and methicillin-resistantStaphylococcus aureus(MRSA) bacteria, which provides a promising candidate for the design of biocompatible drug carriers with facile fabrication and flexible modification for various biomedical applications.

关键词： hydrogen bond hydrogel adhesive mechanical properties self-healing antibacterial

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Controlled Anodic Decomposition Pathway of Supramolecular Lithium Borate for Rationally Tuned Interphase Chemistry

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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2025年第19期64卷 e202500425页

作者： Zhou, Haiyu Hou, Wenhui Zhu, Da Zhou, Pan peng, xuwen Liu, Zhi Yan, Shuaishuai Lu, Yang Ou, Yu Liu, Fengxiang Xia, Yingchun Liu, Hao Cao, Qingbin Song, Xuan Guo, Decai Xu, Hong Liu, Kai Tsinghua Univ Dept Chem Engn State Key Lab Chem Engn Beijing 100084 Peoples R China Tsinghua Univ Inst Nucl & New Energy Technol Beijing 100084 Peoples R China SINOPEC Dalian Res Inst Petr & Petrochem 96 Nankai RdTieshan St Dalian 116045 Liaoning Peoples R China

The rational tailoring and molecular-level engineering of stable cathode-electrolyte interphases (CEIs) is paramount to advancing the performance of next-generation high-energy, layered nickel-rich oxide-based lithium metal batteries. However, developing well-tailored electrolyte additives with rationally controlled interfacial chemistry remains highly challenging. Here, two lithium borates: lithium (2-methoxy-15-crown-5)trifluoroborate (C-LiMCFB) and lithium (15-methoxy-2,5,8,11,14-pentaoxahexadecan)trifluoroborate (L-LiMCFB), incorporating cyclic 15-crown-5 (15C5) and linear pentaethylene glycol monomethyl ether (PEGME) as respective host groups tethered to the boron center are designed and synthesized. In C-LiMCFB, the supramolecular polydentate chelation/de-chelation of the 15C5 with Li+ can sequentially deactivate/activate the anodic decomposition of the C & horbar;O bonds, therefore leading to the controlled cleavage pathway of B & horbar;O and C & horbar;O bonds. The controlled interfacial chemistry leads to the formation of a uniform CEI layer, rich in lithium boron-oxygen clusters interwoven with LiF, on the NCM811 surface. This novel CEI configuration demonstrates an exceptional balance of mechanical robustness, adhesiveness, and toughness, providing highly desirable protection for the NCM811 cathode. The discovery of these novel supramolecular boron-based lithium salts not only unlocks supramolecular chemistry for rational electrolyte tuning but also provides a deeper understanding of the CEI formation mechanism in high-energy lithium metal batteries.

关键词： Battery electrolytes Energy storage Lithium metal batteries Supramolecular chemistry

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降低铅银渣含锌的研究与实践

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湖南有色金属 2023年第4期39卷 33-35页

作者：彭许文南丹县南方金属有限责任公司广西南丹547000

通过加强多膛炉操作,降低氧化锌中的不溶锌含量,过程中加强球磨矿浆粒度、温度、酸度与反应时间的控制,可以大幅降低铅银渣含锌,不但可以降低损失、创造效益,也为后续铅银渣进入铅冶炼系统处理创造了良好的条件。

关键词：锌浸出渣多膛炉不溶锌中性浸出酸性浸出铅银渣 ZnS

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Coacervate-Based Instant and Repeatable Underwater Adhesive with Anticancer and Antibacterial Properties

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ACS APPLIED MATERIALS & INTERFACES 2021年第40期13卷 48239-48251页

作者： peng, Qiongyao Wu, Qiuqiu Chen, Jingsi Wang, Tao Wu, Meng Yang, Diling peng, xuwen Liu, Jifang Zhang, Hao Zeng, Hongbo Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada Guangzhou Med Univ Affiliated Hosp 6 Qingyuan Peoples Hosp Qingyuan 511500 Guangdong Peoples R China

Underwater adhesion is a great challenge for the development of adhesives as the attractive interfacial intermolecular interactions are usually weakened by the surface hydration layer. The coacervation process of sessile organisms like marine mussels and sandcastle worms has inspired substantial research interest in the fabrication of long-lasting underwater adhesives, but they generally suffer from time-consuming curing triggered by surrounding environmental changes and cannot reserve the adhesiveness once damaged. Herein, an instant and repeatable underwater adhesive was developed based on the coacervation of tannic acid (TA) and poly(ethylene glycol)(77)-b-poly(propylene glycol)(29)-b-poly(ethylene glycol)(77) (PEG-PPG-PEG, F68), which was driven by hydrogen-bonding interaction, and the hydrophobic cores of F68 micelles offered an additional cross-linking to enhance the mechanical properties. The TA-F68 coacervates could be facilely painted on different substrates, exhibiting robust and instant underwater adhesion (with adhesion strength up to 1.1 MPa on porcine skin) and excellent repeatability (at least 1000 cycles), superior to the previously reported coacervates. Due to the biological activities of TA, the underwater adhesive displayed innate anticancer and antibacterial properties against different types of cancer cells and bacteria, showing great potential for diverse biomedical applications, such as injectable drug carriers, tissue glues, and wound dressings.

关键词： instant and repeatable underwater adhesive coacervation hydrogen-bonding interaction hydrophobic interaction anticancer antibacterial

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Interphasial Chemistry Design for Seamless Lithium Deposition in Anode-Free Lithium Metal Batteries

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ADVANCED MATERIALS 2025年

作者： Song, Xuan Liu, Cheng Zhang, Aiyuan Ding, Li Zeng, Tianyou Lu, Yang Ou, Yu Hou, Wenhui Zhou, Pan Cao, Qingbin Yan, Shuaishuai Liu, Zhi peng, xuwen Zhou, Haiyu Xia, Yingchun Zhang, Weili Liu, Hao Liu, Kai Tsinghua Univ Dept Chem Engn Beijing 100084 Peoples R China China Acad Space Technol Beijing 100094 Peoples R China Beijing Mingyuan Space Elect Informat Technol Co L Beijing 100080 Peoples R China Tsinghua Univ Hefei Inst Publ Safety Res Hefei 230601 Peoples R China

Anode-free lithium metal batteries (AFLMBs) are promising due to ultrahigh energy density, reduced manufacturing costs, and enhanced safety through active lithium elimination. However, their practical implementation remains challenged by unstable electrode-electrolyte interfaces and the resulting rapid active species depletion. Herein, an ultrathin ion-conducting membrane (ICM) is designed, featuring uniformly distributed rigid benzenesulfonimide anionic groups and flexible lithiophilic groups containing ether oxygen groups. The constrained benzenesulfonimide anions enable exceptional charge separation and reduced spatial resistance, boosting lithium-ion mobility, while the integrated lithophilic network directs lateral lithium deposition through ionic nanochannels. This ICM layer effectively promotes the enrichment of anions at the interface and constructs stable anion-derived solid electrolyte interphases (SEI). Meanwhile, ICM layers with electron-insulating and ion-conducting properties can further prevent side reactions, and suppress dendritic Li growth acting as a natural shield, resulting in seamless lithium deposition. Specifically, the Li||Cu coin cells with ICM achieve 99.82% Coulombic efficiency. The AFLMBs assembled with ICM-coated copper foil (ICM Cu) and NCM811 deliver an energy density of 495 Wh kg-1 with 80.72% capacity retention after 100 cycles. The interphasial chemistry design strategy provides insights into the precise interfacial engineering to realize high-performance, high-safety battery systems and facilitates their development for practical applications.

关键词： anode-free lithium metal batteries dendrite suppression interphasial chemistry ion-conducting membranes solid electrolyte interphases

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Coacervation-driven instant paintable underwater adhesives with tunable optical and electrochromic properties

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JOURNAL OF MATERIALS CHEMISTRY A 2021年第22期9卷 12988-13000页

作者： peng, Qiongyao Chen, Jingsi Wang, Tao Gong, Lu peng, xuwen Wu, Meng Ma, Yuhao Wu, Feiyi Yang, Diling Zhang, Hao Zeng, Hongbo Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada Univ Alberta Dept Biomed Engn Edmonton AB T6G 2V2 Canada

Coacervation generally refers to liquid-liquid phase separation when mixing oppositely charged polyelectrolytes in an aqueous solution, which produces a polyelectrolyte-dense coacervate phase in a dilute solution phase. Coacervation plays a crucial role in many biological processes such as the versatile underwater adhesion of sessile organisms, cellular compartmentalization, and cell replication, which inspires a surge of biomimetic designs of underwater adhesives. However, conventional coacervate-based underwater adhesives are usually weak and lack functionalities, limiting their practical applications in biomedical and engineering fields. Herein, a novel instant underwater adhesive is presented based on coacervation via one-step mixing of aqueous solutions of silicotungstic acid (SiW) and poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (P123) micelles, driven by hydrogen-bonding and hydrophobic interactions. The as-prepared adhesive possesses instant and excellent underwater adhesion (up to 479.6 kPa on poly(methyl methacrylate)) and can be facilely painted underwater on diverse substrates, showing resistance to water flush as well as repeatable stretching and bending of the substrates, superior to many previously reported coacervates. The adhesive also exhibits outstanding stability in high-salt aqueous solutions up to 3 M for at least 1200 h. The introduction of P123 endows the adhesives with thermo-responsive optical properties, while the innate reduction-related color switch of SiW offers electrochromic properties. The functional adhesives hold great promise in bioengineering applications and for the fabrication of novel flexible electronics such as smart aqueous batteries and low-power electrochromic windows.

关键词： Substrates

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Hydrogels for the removal of the methylene blue dye from wastewater: a review

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ENVIRONMENTAL CHEMISTRY LETTERS 2022年第4期20卷 2665-2685页

作者： Yang, Yinchuan Zhu, Qinlin peng, xuwen Sun, Jingjing Li, Cong Zhang, Xinmiao Zhang, Hao Chen, Jiabin Zhou, Xuefei Zeng, Hongbo Zhang, Yalei Tongji Univ Coll Environm Sci & Engn State Key Lab Pollut Control & Resources Reuse Shanghai 200092 Peoples R China Tongji Univ Shanghai Inst Pollut Control & Ecol Secur Shanghai 200092 Peoples R China Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G IH9 Canada Univ Shanghai Sci & Technol Coll Environm & Architecture Shanghai 200093 Peoples R China Sinopec Beijing Res Inst Chem Ind Environm Protect Res Inst Beijing 100013 Peoples R China

Water pollution is a major environmental issue with the rapid development of industry. Therefore, advanced technologies and materials are needed to remove pollutants from contaminated waters. The adsorption process displays many advantages such as high adaptability and removal efficiency for water sources of varying quality. Hydrogels have recently attracted attention due to their high adsorption capacity and structural stability, yet several issues remain to be explored, such as the number of reuse and engineering applications. Here, we review hydrogels for the removal of methylene blue from wastewater, with focus on hydrogel preparation and properties, adsorption performance and mechanisms, reusability and comparison with biological and chemical oxidation methods.

关键词： Hydrogel Methylene blue Adsorption Dye Wastewater treatment

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