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intermolecular and surface forces in atomic-scale manufacturing

International Journal of Extreme Manufacturing 2022年第2期4卷 32-48页

作者： Xin Hou Jingyang Li Yuanzhe Li Yu Tian State Key Laboratory of Tribology Department of Mechanical EngineeringTsinghua UniversityBeijing100084People’s Republic of China

Atomic and close-to-atomic scale manufacturing(ACSM)aims to provide techniques for manufacturing in various fields,such as circuit manufacturing,high energy physics equipment,and medical devices and *** realization of atomic scale material manipulation depending on the theoretical system of classical mechanics faces great *** and using intermolecular and surface forces are the basis for better designing of *** of atoms based on scanning tunneling microscopy or atomic force microscopy(AFM)is an essential process to regulate intermolecular ***-assemble process is a thermodynamic process involving complex intermolecular *** competition of these interaction determines structure assembly and packing *** typical nanomachining processes including AFM nanomachining and chemical mechanical polishing,the coupling of chemistry and stress(tribochemistry)assists in the removal of surface ***,based on the principle of triboelectrochemistry,we expect a further reduction of the potential barrier,and a potential application in high-efficiency atoms removal and fabricating functional *** fundamental research is proposed for achieving high-efficiency and high-accuracy manufacturing with the aiding of external *** review highlights the significant contribution of intermolecular and surface forces to ACSM,and may accelerate its progress in the in-depth investigation of fundamentals.

关键词： intermolecular and surface forces atomic-scale manufacturing transformation of atoms AFM nanomachining chemical mechanical polishing triboelectrochemistry

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Probing the Interfacial forces and surface Interaction Mechanisms in Petroleum Production Processes

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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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