α-Zirconium phosphate nanoplatelets as lubricant additives

He, Xingyao; Xiao, Huaping; Choi, Hyun Rim; Díaz, Agustín; Mosby, Brian M.; Clearfield, Abraham; Liang, Hong

doi:10.1016/j.colsurfa.2014.03.041

Cited by 95 publications

(49 citation statements)

References 49 publications

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“…These include materials such as phosphates and layered oxides. Recently, Liang and co-workers have explored the use of Zr phosphate nano-platelets and yttrium oxide nanosheets (Y 2 O 3 ) as additives for lubricants as well as abrasive additives for processes such as chemomechanical planarization [79,80]. As with many of the above describe platelet systems, the Zr phosphate nano-platelets (on the order of 30 nm in thickness and 600-1000 nm in length) can be incorporated into oil or water based lubricants as an additive with loadings ranging from 0.0004 wt% to 0.5 wt%, which showed decreases in friction from anywhere from 65% to 91% (Fig.…”

Section: Nanoparticle Additivesmentioning

confidence: 99%

2D-nanomaterials for controlling friction and wear at interfaces

2015

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This review focuses on recent developments in the use of 2D nanomaterials for controlling the frictional properties of surfaces and interfaces. While materials such as MoS 2 and graphite have been investigated for some time, a host of other layered nanomaterials have emerged as alternatives for friction modification. These advanced lubrication schemes provide an opportunity to address growing needs in energy and materials efficiency and device compatibility, offering improved boundary and solid lubrication of contacting and sliding interfaces. Here, we describe both computational and experimental investigations of the mechanisms and implementations of 2D nanomaterials in the lubrication of interfaces.

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Section: Nanoparticle Additivesmentioning

confidence: 99%

2D-nanomaterials for controlling friction and wear at interfaces

2015

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“…The short running-in period indicates the high working efficiency of α-ZrP. We have recently reported the effective reduction of friction using sheet-like α-ZrP nanoparticles in both mineral oil and water [16]. Within the boundary lubrication regime, two surfaces are closely in contact with each other.…”

Section: Friction and Wearmentioning

confidence: 99%

“…Phosphoric acid (85 wt% in H 2 O) was purchased from Fisher-Scientific. The α-ZrP nanoplatelets were synthesized by hydrothermal method reported by Sun and coworkers [18], and it has been described in our previous reports [16,17]. In summary, 4.0 g of ZrOCl 2¨8 H 2 O was mixed well with 40.0 mL 12 M H 3 PO 4 in a sealed Teflon ® -lined pressure vessel and heated at 200˝C for 24 h. The product was washed with deionized water and isolated by centrifuging five times at 5000 rpm, and dried at 70˝C for 24 h.…”

Section: Methodsmentioning

confidence: 99%

“…In our recent studies, we have discovered that when α-ZrP nanoparticles were added into pure base oils, the friction and wear were significantly reduced. We have reported that amine intercalated α-ZrP nanoparticles can reduce friction by more than 60% in a mineral oil [16,17]. To evaluate the viability of those particles in commercial based oils, the behavior of the additive in comparison with a commercially used additive, ZDDP, should be studied.…”

Section: Introductionmentioning

confidence: 99%

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Formation of Anti-Wear Tribofilms via α-ZrP Nanoplatelet as Lubricant Additives

et al. 2016

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Abstract:Effective tribofilms are desirable to protect mechanical systems. In the present research, we investigated the formation of a tribofilm through the use of α-ZrP (Zr(HPO 4 ) 2¨H2 O) as an additive. Experiments were conducted on a base oil where 0.2 wt% of the additive was used. Experimental results showed a 50% reduction in friction and a 30% reduction in wear when compared to the base oil containing 0.8 wt% ZDDP. Spectroscopic characterization indicated that the tribofilm consists of iron oxide, zirconium oxide, and zirconium phosphates. The worn surface was seen to be smooth which renders it desirable for bearing systems.

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“…Herein, the possible reason for our observations is that the pristine ZrP nanoplatelets possess excellent lubricating properties, 50 and are thus likely to help increase the mobility and exibility of the surrounding polymer chains in Nylon6. The detailed studies on the role of the pristine ZrP nanoplatelets in polymer nanocomposites as well as their effect on the crystallization behaviors of Nylon6 are under way and will be reported in the future.…”

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confidence: 99%

Enhanced mechanical properties of Nylon6 nanocomposites containing pristine α-zirconium phosphate nanoplatelets of various sizes by melt-compounding

et al. 2017

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Nylon6 nanocomposites containing pristine layered a-zirconium phosphate (ZrP) nanoplatelets of various sizes have been fabricated by a simple and direct melt-compounding method without adding intercalation or exfoliation agents. Owing to the excellent compatibility between the nanofillers and Nylon6, the pristine ZrP nanoplatelet nanocrystallites were well dispersed and homogeneously distributed into the polymer matrices during the melt processing, but still maintained their original layered state as observed by scanning electron microscopy and X-ray diffraction. Tensile testing and dynamic mechanical analysis on the Nylon6/ZrP nanocomposites illustrate that the size and concentration of the pristine ZrP nanoplatelets have a profound effect on the mechanical properties of such prepared polymer nanocomposites. The improvement of the mechanical reinforcement for the Nylon6 nanocomposites does not show a steady increase with the increase in the size and concentration of the embedded pristine ZrP nanoplatelets, but displays the maximum for the pristine ZrP nanoplatelets with a size ranging from 600 nm to 800 nm at a concentration of $3.0-5.0% in the polymer matrices. The mechanisms that are responsible for the mechanical reinforcement of thermoplastic polymer matrices by the embedded pristine ZrP nanoplatelets, as well as their comparisons with corresponding epoxy nanocomposites, are also discussed.

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α-Zirconium phosphate nanoplatelets as lubricant additives

Cited by 95 publications

References 49 publications

2D-nanomaterials for controlling friction and wear at interfaces

2D-nanomaterials for controlling friction and wear at interfaces

Formation of Anti-Wear Tribofilms via α-ZrP Nanoplatelet as Lubricant Additives

Enhanced mechanical properties of Nylon6 nanocomposites containing pristine α-zirconium phosphate nanoplatelets of various sizes by melt-compounding

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