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Autoren:
Han, Weijia; Luo, Siwei; Bröker, Dirk; Vennemann, Norbert; Haase, Markus; Duesberg, Georg S.; Steinhart, Martin 
Dokumenttyp:
Zeitschriftenartikel / Journal Article 
Titel:
Slippery polymer monoliths: Surface functionalization with ordered MoS2 microparticle arrays 
Zeitschrift:
Colloids and Surfaces A : Physicochemical and Engineering Aspects 
Jahrgang:
617 
Jahr:
2021 
Seiten von - bis:
126363 
Sprache:
Englisch 
Abstract:
Components of technical systems and devices often require self-lubricating properties, which are implemented by means of dry lubricants. However, continuous lubricant coatings on the components’ surfaces often suffer from poor adhesion, delamination and crack propagation. The replacement of continuous coatings with dense ordered arrays of microparticles consisting of dry lubricants may overcome these drawbacks. Using the well-established solid lubricant MoS2 as model system, we demonstrate that the sliding capability of polymeric monoliths can be significantly enhanced by integration of arrays of micron-sized dry lubricant microparticles into their contact surfaces. To synthesize the MoS2 microparticle arrays, we first prepared ordered hexagonal arrays of ammonium tetrathiomolybdate (ATM) microparticles on Si wafers by molding against poly(dimethylsiloxane) templates followed by high-temperature conversion of the ATM microparticles into MoS2 microparticles under Ar/H2 atmosphere in the presence of elemental sulfur. Finally, the obtained large-scale hexagonal MoS2 microparticle arrays were transferred to the surfaces of polymer monoliths under conservation of the array ordering. Self-lubrication of components of technical systems by incorporation of dry lubricant microparticle arrays into their contact surfaces is an example for overcoming the drawbacks of continuous functional coatings by replacing them with microparticle arrays. 
Article-ID:
126363 
Fakultät:
Fakultät für Elektrotechnik und Informationstechnik 
Institut:
EIT 2 - Institut für Physik 
Professur:
Düsberg, Georg 
Open Access ja oder nein?:
Nein / No