Adhesion and tribological property of Cu nanoparticles‐doped hydrophobic polyelectrolyte multilayers

Abstract

Hydrophobic polyelectrolyte multilayers (PEMs) doped with Cu nanoparticles and modified with fluoroalkylsilane were prepared by a series of reaction cycles, where the polyelectrolyte multilayers were constructed by alternate pipetting of the solutions of poly(diallyldimethylammonium chloride) and poly(sodium 4‐styrene sulfonate) onto a spinning substrate (quartz slide or silicon wafer), and resultant PEMs‐coated substrate was immersed in Cu2+ and NaBH4 solutions to allow nucleation of Cu nanoparticles. The relationship between the water wettability and tribological behavior of the as‐prepared hydrophobic PEMs was studied. Results show that the wettability of the hydrophobic PEMs can be controlled by properly adjusting the reaction cycle. The adhesion and tribological behavior of the Cu nanoparticles‐doped hydrophobic PEMs, excluding the one obtained at 12 reaction cycles, are closely related to their wettability. That is, the PEM film with stronger hydrophobicity has a lower surface energy, showing a lower friction and longer anti‐wear life. Copyright © 2012 John Wiley & Sons, Ltd.

Advance in Tribology Study of Polyelectrolyte Multilayers

“…Moreover, some polyelectrolyte solution mixed with metal ions can form polymer complexes. The study shows that the in situ gold and silver nanoparticles in polyelectrolyte multilayer film can be prepared by alternate immersion of a substrate in PDDA-AuCl 4− complexes solution and PAA-Ag The tribological properties of nanoparticles-doped composite PEMs were investigated by microtribometer [21][22][23][52][53][54][55][56]. The statistic results of friction and wear behaviors are shown in Figure 6.…”

“…A 4.5-bilayer PDDA/PSS PEM on quartz or silicon plate was prepared by spin-assisted layer-by-layer assembly technique. Then, PDDA/PSS doped with Cu nanoparticles was built by immersing PDDA/PSS PEMs in Cu 2+ and NaBH 4 solutions to allow nucleation of Cu nanoparticles [23]. The relationship between water wettability and tribological properties of PDDA/PSS doped with Cu nanoparticles films showed that the adhesion and tribological behavior were closely related to their wettability.…”

Preparation and tribological properties of surface‐modified ZnS nanoparticles

“…), rare earth compound (Y 2 O 3 , LaF 3 , CeF 3 etc. ), borate, and metal (Co, Ni, Cu etc.). In order to give full play to the advantage of the nanomaterials, the nanomaterials should have good dispersion stability in lubrication oils.…”