Surface Forces, Adhesion, and Friction

A special issue of Colloids and Interfaces (ISSN 2504-5377).

Deadline for manuscript submissions: closed (30 June 2020) | Viewed by 15902

Special Issue Editors


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Guest Editor
Department of Civil and Environmental Engineering, University of Illinois at Urbana−Champaign, Urbana, IL 61801, USA
Interests: friction; adhesion; lubrication; surface forces; nanotribology; tribochemistry; soft matter nanoconfinement; ionic liquids; hydrogels; surface forces apparatus
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Chemical and Environmental Engineering, University of California, Riverside, Riverside, CA 92521, USA
Interests: surface engineering; wetting; adhesion; friction and wear; bio-inspired/sustainable coatings; dynamics of nanomaterials under nano-confinement; (nano)Rheology; biomechanics; biophysics; colloidal stabilization; adsorption and desorption; enhanced oil recovery

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Guest Editor
Department of Chemical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
Interests: tribology; surface science and engineering; glass surfaces; plant cell walls; cellulosic nanomaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to invite you to contribute to a forthcoming special topic on “Surface Forces, Adhesion, and Friction” to be published in Colloids and Interfaces. This Special Issue will focus on the fundamental intermolecular and surface forces at multiple length scales ranging from nano- to macro-scale. Topics of interest will cover intermolecular forces at interfaces, adhesion, anti-adhesion (antifouling), friction, and tribology- and nanotribology-related subjects. Other relevant topics will include nanoscale organization and dynamics of confined molecules and particles at interfaces and in pores when the degree of confinement becomes comparable with the characteristic length scale of the confined molecules and particles.

Please review the journal’s instructions for authors before submitting. These instructions can be downloaded from the following link: https://www.mdpi.com/journal/colloids/instructions .

To submit your manuscript, please go to https://susy.mdpi.com/ . You will need to register, if you have not done so previously, then follow the on-screen instructions for Submitting a New Manuscript.

When submitted, your paper will be peer reviewed and you may be asked to make further revisions before acceptance. All manuscripts must be original and not previously published or under consideration for publication elsewhere.We would appreciate receiving your submission by June 30, 2020.

With best regards,

Prof. Dr. Rosa M. Espinosa-Marzal
Prof. Dr. Younjin Min
Prof. Dr. Seong H. Kim
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Colloids and Interfaces is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • intermolecular forces
  • colloids
  • rheology and nanorheology
  • wetting
  • friction, adhesion, and molecular lubrication mechanisms
  • molecular and nanoparticle confinement
  • mineralization and crystallization via colloid assembly and attachment

Published Papers (2 papers)

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Review

24 pages, 7733 KiB  
Review
Advances in Understanding Hydrogel Lubrication
by Tooba Shoaib and Rosa M. Espinosa-Marzal
Colloids Interfaces 2020, 4(4), 54; https://doi.org/10.3390/colloids4040054 - 13 Nov 2020
Cited by 22 | Viewed by 4543
Abstract
Since their inception, hydrogels have gained popularity among multiple fields, most significantly in biomedical research and industry. Due to their resemblance to biological tribosystems, a significant amount of research has been conducted on hydrogels to elucidate biolubrication mechanisms and their possible applications as [...] Read more.
Since their inception, hydrogels have gained popularity among multiple fields, most significantly in biomedical research and industry. Due to their resemblance to biological tribosystems, a significant amount of research has been conducted on hydrogels to elucidate biolubrication mechanisms and their possible applications as replacement materials. This review is focused on lubrication mechanisms and covers friction models that have attempted to quantify the complex frictional characteristics of hydrogels. From models developed on the basis of polymer physics to the concept of hydration lubrication, assumptions and conditions for their applicability are discussed. Based on previous models and our own experimental findings, we propose the viscous-adhesive model for hydrogel friction. This model accounts for the effects of confinement of the polymer network provided by a solid surface and poroelastic relaxation as well as the (non) Newtonian shear of a complex fluid on the frictional force and quantifies the frictional response of hydrogels-solid interfaces. Finally, the review delineates potential areas of future research based on the current knowledge. Full article
(This article belongs to the Special Issue Surface Forces, Adhesion, and Friction)
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31 pages, 7732 KiB  
Review
Thickness and Structure of Adsorbed Water Layer and Effects on Adhesion and Friction at Nanoasperity Contact
by Chen Xiao, Pengfei Shi, Wenmeng Yan, Lei Chen, Linmao Qian and Seong H. Kim
Colloids Interfaces 2019, 3(3), 55; https://doi.org/10.3390/colloids3030055 - 6 Aug 2019
Cited by 58 | Viewed by 10537
Abstract
Most inorganic material surfaces exposed to ambient air can adsorb water, and hydrogen bonding interactions among adsorbed water molecules vary depending on, not only intrinsic properties of material surfaces, but also extrinsic working conditions. When dimensions of solid objects shrink to micro- and [...] Read more.
Most inorganic material surfaces exposed to ambient air can adsorb water, and hydrogen bonding interactions among adsorbed water molecules vary depending on, not only intrinsic properties of material surfaces, but also extrinsic working conditions. When dimensions of solid objects shrink to micro- and nano-scales, the ratio of surface area to volume increases greatly and the contribution of water condensation on interfacial forces, such as adhesion (Fa) and friction (Ft), becomes significant. This paper reviews the structural evolution of the adsorbed water layer on solid surfaces and its effect on Fa and Ft at nanoasperity contact for sphere-on-flat geometry. The details of the underlying mechanisms governing water adsorption behaviors vary depending on the atomic structure of the substrate, surface hydrophilicity and atmospheric conditions. The solid surfaces reviewed in this paper include metal/metallic oxides, silicon/silicon oxides, fluorides, and two-dimensional materials. The mechanism by which water condensation influences Fa is discussed based on the competition among capillary force, van der Waals force and the rupture force of solid-like water bridge. The condensed meniscus and the molecular configuration of the water bridge are influenced by surface roughness, surface hydrophilicity, temperature, sliding velocity, which in turn affect the kinetics of water condensation and interfacial Ft. Taking the effects of the thickness and structure of adsorbed water into account is important to obtain a full understanding of the interfacial forces at nanoasperity contact under ambient conditions. Full article
(This article belongs to the Special Issue Surface Forces, Adhesion, and Friction)
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