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Terwisscha-Dekker H, Hogenelst T, Bliem R, Weber B, Bonn D. Why Teflon is so slippery while other polymers are not. Phys Rev E 2023; 107:024801. [PMID: 36932486 DOI: 10.1103/physreve.107.024801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Polytetrafluoroethylene [PTFE (Teflon)] is a uniquely slippery polymer, with a coefficient of friction that is an order of magnitude lower than that of other polymers. Though known as nonsticky, PTFE leaves a layer of material behind on the substrate while sliding. Here, we use contact-sensitive fluorescent probes to image the sliding contact in situ: We show that slip happens at an internal PTFE-PTFE interface that has an unusually low shear strength of 0.8 MPa. This weak internal interface directly leads to low friction and enables transfer of the PTFE film to the substrate even in the absence of strong adhesion.
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Affiliation(s)
- Hans Terwisscha-Dekker
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands
| | - Tadeus Hogenelst
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands
- Advanced Research Center for Nanolithography (ARCNL), Science Park 106, 1098 XG Amsterdam, the Netherlands
| | - Roland Bliem
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands
- Advanced Research Center for Nanolithography (ARCNL), Science Park 106, 1098 XG Amsterdam, the Netherlands
| | - Bart Weber
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands
- Advanced Research Center for Nanolithography (ARCNL), Science Park 106, 1098 XG Amsterdam, the Netherlands
| | - Daniel Bonn
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands
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Liu YL, Han CC, Wei TC, Chang Y. Surface-initiated atom transfer radical polymerization from porous poly(tetrafluoroethylene) membranes using the CF groups as initiators. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.23975] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Xi ZY, Xu YY, Zhu LP, Zhu BK. Modification of polytetrafluoroethylene porous membranes by electron beam initiated surface grafting of binary monomers. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2009.04.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Liu YL, Luo MT, Lai JY. Poly(tetrafluoroethylene) Film Surface Functionalization with 2-Bromoisobutyryl Bromide as Initiator for Surface-Initiated Atom-Transfer Radical Polymerization. Macromol Rapid Commun 2007. [DOI: 10.1002/marc.200600718] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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