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Julthongpiput, Duangrut; Ahn, Hyo-Sok; Kim, Doo-In; Tsukruk, Vladimir V.

doi:10.1023/a:1016507803915

Cited by 25 publications

(19 citation statements)

References 21 publications

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“…For microtribology studies, a custom-built microtribometer, effectively an oscillation friction and wear tester [39], was used to evaluate the frictional characteristics and to study the wear resistance of the Y-shaped brushes after treatment with the selective solvents. Before testing, the brushes were ªswitchedº by exposure to the particular solvent for 12 h, dried in ambient air under room temperature for 5 min, and immediately tested in the dry state.…”

Section: Methodsmentioning

confidence: 99%

Microtribological and Nanomechanical Properties of Switchable Y-Shaped Amphiphilic Polymer Brushes

et al. 2005

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Section: Methodsmentioning

confidence: 99%

Microtribological and Nanomechanical Properties of Switchable Y-Shaped Amphiphilic Polymer Brushes

et al. 2005

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“…Modern magnetic storage systems and microelectromechanical systems (MEMS) require a protective coating which is crucial for providing lower friction, and higher antiwear life for inherently brittle electronic materials [1]. Molecular order films such as LB films, polyelectrolyte multilayers (PEMs) and self-assembled monolayers as one of the most promising technologies have drawn much attention.…”

Section: Introductionmentioning

confidence: 99%

Study on the tribological behaviors of polyelectrolyte multilayers containing copper hydroxide nanoparticles

Yang

Zhang

2006

Tribol Lett

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In this paper, we reported the tribological behaviors of polyelectrolyte multilayers (PEMs) containing copper hydroxide nanoparticles, polymer films were prepared by the sequential adsorption Poly(diallyldimethylammonium chloride) (PDDA) and poly(sodium 4-styrenesulfonate) (PSS) alternately on substrate. The nucleation of copper hydroxide nanoparticles was achieved using a cyclical absorption-hydrolysis process in which copper ions were absorbed into the polymer matrix (which bind to the sulfonate groups) and then hydrolysis in an alkali solution. The structure and the morphology of before and after the in-situ synthesis copper hydroxide nanoparticles in the PEMs matrix have been explored. The coefficient of friction as a function of sliding velocity and normal load also has been studied. The composites exhibited increased wear resistance compared with the pristine polymer films. This may partly be attributed to the enhanced load-carrying capacity of the inorganic nanoparticles in the PEMs.

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“…Examples include motors, turbines, gear trains, actuators, valves, accelerometers, and display‐device mirror assemblies 2. Langmuir monolayers,3 self‐assembled thiol‐based,2 silane‐based,4–6 and alkene‐based7 monolayer films, and polymer films with layered architectures8–11 have been investigated in this regard. The coatings demonstrate low friction forces; only some provide wear reduction of underlying substrates at higher normal stresses 9–11…”

Section: Introductionmentioning

confidence: 99%

Engineering the friction‐and‐wear behavior of polyelectrolyte multilayer nanoassemblies through block copolymer surface capping, metallic nanoparticles, and multiwall carbon nanotubes

Pavoor

Gearing

Gorga

et al. 2004

J of Applied Polymer Sci

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ABSTRACT:In previous work, it was demonstrated that coating a surface with polyelectrolyte multilayers (PEMs) composed of polyallylamine hydrochloride (PAH) and poly-(acrylic acid) (PAA) resulted in increased friction forces at low normal loads. At stress levels sufficient to cause system wear, however, PAH/PAA PEMs provided significant wear protection for the underlying substrate. This report evaluates three strategies for reducing the coefficients of friction associated with PEMs at low normal stress, while retaining their wear-retarding properties at high normal loads. Anchoring polystyrene-block-poly(acrylic acid) to the PAH surface of a multilayer film, less than 10 nm thick, enhanced the hardness, and hence the load-bearing capacity of these structures. The effect of surface capping was most pronounced at high normal stresses, where substantial wear prevention was observed, accompanied by low friction forces. These films are well suited for systems where wear particle generation hinders smooth operation. The second strategy used the in situ synthesis of silver nanoparticles in the PEM matrix for friction reduction. Optimum levels of silver clusters are required at the surface to reduce the friction forces. Finally, multilayer composites were constructed using PAH and multiwall carbon nanotubes. These assemblies exhibited the lowest values of friction among the strategies studied, at all levels of stress; in addition, substrate wear prevention was also achieved. The tribological behavior of the PEM-modification strategies was correlated with the mechanical properties of the films, elicited by nanoindentation.

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Cited by 25 publications

References 21 publications

Microtribological and Nanomechanical Properties of Switchable Y-Shaped Amphiphilic Polymer Brushes

Microtribological and Nanomechanical Properties of Switchable Y-Shaped Amphiphilic Polymer Brushes

Study on the tribological behaviors of polyelectrolyte multilayers containing copper hydroxide nanoparticles

Engineering the friction‐and‐wear behavior of polyelectrolyte multilayer nanoassemblies through block copolymer surface capping, metallic nanoparticles, and multiwall carbon nanotubes

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