Synthesis and tribological properties of CuS/ZnS nanoparticles doped polyelectrolyte multilayers

Abstract

Polyelectrolyte multilayer thin films [poly(diallyl dimethylammonium chloride) (PDDA) and poly(acrylic acid) (PAA)] for the synthesis of CuS and ZnS nanoparticles were prepared. The CuS/ZnS nanoparticles in situ synthesised by immersing the PDDA/PAA polyelectrolyte multilayer thin films into Cu 2z (or Zn 2z ) and Na 2 S aqueous solutions alternately, which were characterised in detail by UV visible absorption spectroscopy, atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS) analysis. The CuS and ZnS nanoparticles doped polyelectrolyte multilayer thin films were synthesised by the layer-by-layer molecular deposition technology and in situ synthesis method. The coefficient of friction (COF) decreased with the in situ synthesis CuS and ZnS nanoparticles doped into the polyelectrolyte layers. The in situ nanoparticles exhibited enhanced wear resistance performance of the plain polyelectrolyte multilayers.

Advance in Tribology Study of Polyelectrolyte Multilayers

“…Then, the postbinding chemistries include reduction, hydroxide, sulfidation, and growth nanoparticles from the cationic precursors [49,50,68]. For instance, the schematic diagram of the preparation process of in situ CuS/ZnS nanoparticles hybrid PEMs is shown in Figure 5.…”

“…The surface adhesive force is between the AFM tip and the film surface by force-curves mode under ambient condition. AFM tests showed that the adhesive forces between the probe and the sample surface decreased, indicating that the surface interactions between the probe and the sample are reduced by compositing in situ nanoparticles [22,49]. The adhesive force is mainly dependent on the surface interaction between the probe and the sample surfaces.…”

Tribological Properties of ZnS(NH2CH2CH2NH2)0.5 and ZnS as Additives in Lithium Grease

“…The use of solid materials as lubricant additives is very important to reduce friction and wear between the sliding surfaces. To reduce wear, several metal sulfides have been experimentally evaluated through comparative analysis of their tribological behaviors, such as MoS 2 [2][3][4], WS 2 [5,6], FeS [7], CuS [8], and ZnS [9][10][11][12][13][14][15][16][17][18]. Among these metal sulfides, ZnS has been investigated under a wide range of operating conditions in the field of tribology.…”

“…Zhao reported the tribological performance of the hybrid composite ZnS/short fibers/Polyimide under poly-alpha-olefin (PAO) oil lubrication; fibers imparted abrasion resistance to the composite, and ZnS particles generated a tribochemical film during the sliding [13]. Other researchers noted that the filling of ZnS nanoparticles in the polymer can improve the carrying capacity of the polymer and reduce the friction coefficient, so as to improve the mechanical wear resistance and prolong the service life [14][15][16][17]. Kang found that a composite Zn/ZnS coating had excellent friction-reduction and anti-wear properties under dry conditions [18].…”

Preparation and nanotribological properties of polyelectrolyte multilayers with in situ Au nanoparticles

“…Since the control of the size and agglomeration of nanoparticles is difficult. With the novel approach and technology combining with the LBL method, various nanomaterials with desirable shape and composition can be synthesized by loading the reactants into the polyelectrolyte multilayers interior and then performing appropriate reactions which the nanoparticles in situ nucleation and growth in the polyelectrolyte multilayers [16][17][18][19].…”