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The adhesion and Formation mechanism of Blast Furnace Gunning Layer

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China's Refractories 2006年第1期15卷 30-32页

作者： CAO Feng Department of Chemisiry Huzhou University Huzhou 313000 China

Basing on the study of the equilibrium relationship of interfacial tension among gunning particles, repaired surface and atmosphere, this test is in a position to draw a conclusion concerning the adhesion mechanism of the grinning refractory and the repaired surface, which illustrates the formation of the bottom gunning layer by moist fine gunning particles on the repaired surface. Also involved within the scope of discussion and probe are the patterns formed under this contacting effect and the formation mechanism of gunning layer. The analytic research regarding the behavior of gunning interface has ascribed the influence upon adhesion intensity to the quality of furnace gunning refractory, the state of the repaired surface and the gunning techniques.

关键词： Gunning layer adhesion mechanism Rebounding rate

Inter-and intramolecular adhesion mechanisms of mussel foot proteins

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Science China(Technological Sciences) 2020年第9期63卷 1675-1698页

作者： KAN YaJing WEI ZhiYong TAN QiYan CHEN YunFei Jiangsu Key Laboratory for Design and Manugacture of Micro-Nano Biomedical Iastruments and School of Mchanical Enginering.Southeast UniversityNanjing 211189China School of Mechanical Engineering Nanjing Institute of TechnologyNanjing 211167China

Mussel foot proteins(Mfps) secreted in the byssal plaque of marine mussels are widely researched for their relevance to mussel adhesion in water. As the abundant residue in the amino acid sequences of major adhesive proteins, 3,4-dihydroxyphenylalanine(Dopa) or its catecholic moiety plays a key role in both Mfp binding to surface and cohesive cross-linking of Mfps in byssal plaques. The binding performance of an Mfp significantly depends on the content and redox state of Dopa, whereas the types of interaction vary in line with different surface chemistries and p H conditions. Thorough understanding of mussel adhesion from a molecular perspective is crucial to promote the application of synthetic mussel-bionic adhesives. This article presents a brief review of the research progress on the adhesion mechanisms of Mfps, which further emphasizes the contributions of Dopamediated interactions and considers other amino acids and factors. The involved inter-and intramolecular interactions are responsible for not only the diverse adhesion capacities of an adhesive byssal plaque as mussel's adhesion precursor but also the formation and properties of the plaque structure.

关键词： mussel foot protein adhesion mechanism Dopa catechol surface forces apparatus

An efficient method for enhancing adhesion and uniformity of Al_(2)O_(3) coatings on nickel micro-foam used in micropacked beds

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Chinese Journal of Chemical Engineering 2021年第11期34卷 162-172页

作者： Chi Ma Le Sang Xiaonan Duan Jiabin Yin Jisong Zhang State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Methods of coating Al_(2)O_(3) on nickel micro-foam were compared and screened,aiming to overcome the capillary force and prepare the micro-foam monolithic catalyst coatings.The surface of micro-foam substrate was pretreated by a chemical etching method to improve the adhesion of the coatings on the substrate.The results showed that the slurry circulation at 162 ml·min^(-1) was evaluated as the optimal method.The pore size on the substrate surface can be controlled by changing the pretreatment conditions.An empirical correlation was also proposed,showing an excellent practicality for predicting the pore size.The adhesion of the coatings with substrate pretreatment was significantly better than that without substrate pretreatment.The minimum value of mass loss after ultrasonic vibration was 3.9%.This mainly attributes to the squeezing of Al_(2)O_(3) particles in the pores of substrate surface.The coatings on nickel micro-foam are hopefully used in micropacked beds for catalytic reactions.

关键词： Foam Alumina Catalyst support Substrate pretreatment adhesion mechanism Micropacked bed

Research progress and application prospect of functional adhesive materials in the field of oil and gas drilling and production

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Petroleum Exploration and Development 2023年第1期50卷 202-209页

作者： SUN Jinsheng LEI Shaofei BAI Yingrui LYU Kaihe CHENG Rongchao HAO Huijun LIU Fan School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China CNPC Engineering Technology R&D Company Limited Beijing 102206China

By summarizing the composition,classification,and performance characterization of functional adhesive materials,the adhesion mechanisms of functional adhesive materials,such as adsorption/surface reaction,diffusion,mechanical interlocking,and electrostatic adsorption,are expounded.The research status of these materials in oil and gas drilling and production engineering field such as lost circulation prevention/control,wellbore stabilization,hydraulic fracturing,and profile control and water plugging,and their application challenges and prospects in oil and gas drilling and production are introduced comprehensively.According to the applications of functional adhesive materials in the field of oil and gas drilling and production at this stage,the key research directions of functional adhesive materials in the area of oil and gas drilling and production are proposed:(1)blending and modifying thermoplastic resins or designing curable thermoplastic resins to improve the bonding performance and pressure bearing capacity of adhesive lost circulation materials;(2)introducing low-cost adhesive groups and positive charge structures into polymers to reduce the cost of wellbore strengthening agents and improve their adhesion performance on the wellbore;(3)introducing thermally reversible covalent bond into thermosetting resin to prevent backflow of proppant and improve the compressive strength of adhesive proppant;(4)introducing thermally reversible covalent bonds into thermoplastic polymers to improve the temperature resistance,salt-resistance and water shutoff performance of adhesive water shutoff agents.

关键词： functional adhesive materials adhesion mechanism action mechanism lost circulation prevention and control wellbore stabilization hydraulic fracturing profile control and water shutoff application prospect

mechanisms Underlying the Biological Wetadhesion:Coupled Effects of Interstitial Liquid and Contact Geometry

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Journal of Bionic Engineering 2020年第3期17卷 448-456页

作者： Jing Li Jun Liu Chuandong Ma Jiaxin Ji Jianlin Liu College of Mechanical and Electrical Engineering China University of Petroleum(East China)Qingdao 266580China College of Pipeline and Civil Engineering China University of Petroleum(East China)Qingdao 266580China

Wet adhesion is widely adopted in biological adhesion systems in nature,and it is beneficial to design new materials with desired properties based on the underlying physics of wet adhesion.The aim of this work is to develop a design criterion to regulate the wet adhesion.The effects of different contact shapes(flat and sphere)and morphologies of the substrate(smooth,microstructure and nanostructure)on the adhesion force are investigated.Combining with the theoretical models,the dominated factors in the separation process and isolating the viscous contributions from the capillary interactions are evaluated.The results demonstrate that the adhesion mechanisms depend significantly on the capillary numbers of the interstitial liquid and the contact geometry,and the ratio of capillary force to viscous force is a key to regulate the wet adhesion mechanism.These findings can not only explain some phenomena of wet adhesion to organisms,but also provide some inspirations to design new adhesion technology for robotic fingers that can grasp objects in wet environments.

关键词： wet adhesion capillary force viscous force adhesion mechanism

Bridging wounds:tissue adhesives’essential mechanisms,synthesis and characterization,bioinspired adhesives and future perspectives

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Burns & Trauma 2022年第1期10卷 216-245页

作者： Kaige Xu Xiaozhuo Wu Xingying Zhang Malcolm Xing Department of Mechanical Engineering University of ManitobaWinnipegManitoba R3T 2N2Canada

Bioadhesives act as a bridge in wound closure by forming an effective interface to protect against liquid and gas leakage and aid the stoppage of bleeding.To their credit,tissue adhesives have made an indelible impact on almost all wound-related surgeries.Their unique properties include minimal damage to tissues,low chance of infection,ease of use and short wound-closure time.In contrast,classic closures,like suturing and stapling,exhibit potential additional complications with long operation times and undesirable inflammatory responses.Although tremendous progress has been made in the development of tissue adhesives,they are not yet ideal.Therefore,highlighting and summarizing existing adhesive designs and synthesis,and comparing the different products will contribute to future development.This review first provides a summary of current commercial traditional tissue adhesives.Then,based on adhesion interaction mechanisms,the tissue adhesives are categorized into three main types:adhesive patches that bind molecularly with tissue,tissuestitching adhesives based on pre-polymer or precursor solutions,and bioinspired or biomimetic tissue adhesives.Their specific adhesion mechanisms,properties and related applications are discussed.The adhesion mechanisms of commercial traditional adhesives as well as their limitations and shortcomings are also reviewed.Finally,we also discuss the future perspectives of tissue adhesives.

关键词： Adhesive patch adhesion mechanism Nature-inspired Tissue adhesives Bioadhesives

Adhesive hydrogels for bioelectronics

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Biomedical Engineering Communications 2023年第3期2卷 21-37页

作者： Yu-Jing Sheng Yun Chen Jian-Feng Qiu Xi Yang Ru-Liang Zhang Ying-Lun Sun Institute of Medical Engineering and Interdisciplinary Research Medical Science and Technology Innovation CenterShandong First Medical University&Shandong Academy of Medical SciencesJinan 250118China School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Medical Engineering and Technology Research Center School of RadiologyShandong First Medical University&Shandong Academy of Medical SciencesTaian 271000China Department of Mathematics&Statistics Graduate School of Arts&SciencesBoston UniversityMassachusetts 02115USA

Benefiting from the unique advantages of superior biocompatibility,strong stability,good biodegradability,and adjustable mechanical properties,hydrogels have attracted extensive research interests in bioelectronics.However,due to the existence of an interface between hydrogels and human tissues,the transmission of electrical signals from the human tissues to the hydrogel electronic devices will be hindered.The adhesive hydrogels with adhesive properties can tightly combine with the human tissue,which can enhance the contact between the electronic devices and human tissues and reduce the contact resistance,thereby improving the performance of hydrogel electronic devices.In this review,we will discuss in detail the adhesion mechanism of adhesive hydrogels and elaborate on the design principles of adhesive hydrogels.After that,we will introduce some methods of performance evaluation for adhesive hydrogels.Finally,we will provide a perspective on the development of adhesive hydrogel bioelectronics.

关键词： adhesive hydrogels bioelectronics flexible electronic devices adhesion mechanism sensors

Progress of marine biofouling and antifouling technologies

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Science Bulletin 2011年第7期56卷 596-610页

作者： CAO Shan, WANG JiaDao, CHEN HaoSheng & CHEN DaRong State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China State Key Laboratory of Tribology Tsinghua University

adhesion of marine fouling organisms on artificial surfaces such as ship hulls causes many problems, including extra energy consumption, high maintenance costs, and increased corrosion. Therefore, marine antifouling is an important issue. In this review, physical and biochemical developments in the field of marine biofouling, which involves biofilm formation and macro-organism settlement, are discussed. The major antifouling technologies based on traditional chemical methods, biological methods, and physical methods are presented. The chemical methods include self-polishing types such as tributyltin (TBT) self-polishing co- polymer coatings, which despite its good performance has been banned since 2008 because of its serious environmental impact. Therefore, other methods have been encouraged. These include coatings with copper compounds and biocide boosters to replace the TBT coatings. Biological extracts of secreted metabolites and enzymes are anticipated to act as antifoulants. Physical methods such as modification of surface topography, hydrophobic properties, and charge potential have also been considered to prevent biofouling. In this review, most of the current antifouling technologies are discussed. It is proposed that the physical antifouling technologies will be the ultimate antifouling solution, because of their broad-spectrum effectiveness and zero toxicity.

关键词： biofouling antifouling technology biofilm adhesion mechanism

Applying Thermal Spraying to Forming Glass Enamel Coatings

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International Journal of Plant Engineering and Management 1997年第2期2卷 66-69页

作者： Yan Weidong Qin xiongpu Fan shuichao Northwestern Polytechnical University Xi’an 710072

Applying thermal spraying to forming glass enamel coatings is explored in present paper. Four kinds of glass enamel frits suited to flame spraying have been prepared and the flame spraying experiments have conducted. It is possible to form glass enamel coatings on still substrates by a proper flame spraying technique. Besides the obvious mechanical adhesion obtained by roughening the surface of the still substrates, the element micro diffusion between glass enamel coatings and substrates have been produced during the spraying process, Hence metallurgical chemical adhesion is derived.

关键词： glass enamel coatings flame spraying adhesion mechanism