Novel POSS based nanohybrids for improving tribological properties of liquid paraffin

Liu, Lei; Liu, Zhengquan; Huang, Peng

doi:10.1039/c6ra21618h

Cited by 9 publications

(6 citation statements)

References 36 publications

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“…At the optimum concentration (0.80 wt%), the nanoadditives filled the valleys within asperities, and formed a fine lubricating film which prevented the friction pairs from direct contact, leading to a reduced friction coefficient. Above the optimum concentration, random aggregation occurred on the surface of the friction pairs, which was higher than the thickness of the water film in the contact region and this caused abrasive wear, resulting in an increased friction coefficient [10,36,[53][54][55]. Variations of friction coefficient with sliding time are presented in Fig.…”

Section: Structural Analysis Of Cuo Nanostructuresmentioning

confidence: 99%

Controllable synthesis of different morphologies of CuO nanostructures for tribological evaluation as water-based lubricant additives

et al. 2020

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In this study, water soluble CuO nanostructures having nanobelt, nanorod, or spindle morphologies were synthesized using aqueous solutions of Cu(NO 3) 2 3H 2 O and NaOH by adjusting the type of surface modifier and reaction temperature. The effect of morphologies of these various CuO nanostructures as water-based lubricant additives on tribological properties was evaluated on a UMT-2 micro-friction tester, and the mechanisms underlying these properties are discussed. The three different morphologies of CuO nanostructures exhibited excellent friction-reducing and anti-wear properties. Tribological mechanisms differed in the initial stage of frictional interactions, but in the stable stage, a tribochemical reaction film and adsorbed lubricious film on the rubbing surfaces played important roles in hindering direct contact between friction pairs, leading to improved tribological properties.

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Section: Structural Analysis Of Cuo Nanostructuresmentioning

confidence: 99%

Controllable synthesis of different morphologies of CuO nanostructures for tribological evaluation as water-based lubricant additives

et al. 2020

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“…The increased strength and modulus are beneficial for abrasion resistance, and exhibit greater resistance to plastic deformation, scratching, and wear compared with the neat epoxy matrix. On the other hand, the nano‐sized POSS spheres also provide lubrication effects according to self‐lubricating “nano ball bearing” [23] effect to the rubbing surface. Under periodic wear, the surface would undergo three stages, containing deformation, cracking, and desquamation.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, POSS-based hybrid nanomaterials have been used as lubricant additives to achieve high tribological performance owing to their steady inorganic Si-O-Si framework and excellent organic compatibility [21][22][23]. Liu et al [23] utilized octavinyl-POSS (OV-POSS) to react with alkyl mercaptan via a "thiol-ene click" reaction to obtain additives for lubricant oils. Only a very low content (0.40 wt%) of POSS hybrid nanomaterial in the lubricant oil was able to achieve very low friction coefficients (0.099).…”

Section: Introductionmentioning

confidence: 99%

Thermal, mechanical, and tribological properties of epoxy polymer/EPU blends reinforced by low concentration of octaaminophenyl POSS

Zhang

Yao

et al. 2020

Polymer Engineering & Sci

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Epoxy matrix nanocomposites were prepared by diglycidyl ether of bisphenol A (DGEBA) modified with epoxide polyurethane (EPU) containing oxazone‐group and reinforced by low concentrations of octaaminophenyl polyhedral oligomeric silsesquioxane (OAPOSS). The thermal, mechanical, and thermomechanical properties of as‐prepared hybrid nanocomposites were studied. The results demonstrate that the thermal stability, tensile strength, glass transition temperature, and storage modulus of epoxy polymer/EPU blends are all significantly improved with OAPOSS as an reinforcement. The inclusion of EPU in the epoxy polymer helps improve the toughness of the matrix, providing higher impact strength, and higher elongation at break. Tribological testing shows that the wear rate of the hybrid nanocomposite is reduced by more than 80% at 0.1 wt% OAPOSS compared with pure epoxy‐EPU, while the friction coefficient is nearly unchanged. SEM‐EDS analysis of worn scar indicates that the wear mechanism of OAPOSS incorporated hybrid composites is the coexistence of abrasive wear and adhesive wear. The improved properties are due to the uniform dispersion of OAPOSS in the epoxy‐EPU matrix and network formation by cross‐linking and chemical bonds from OAPOSS reacted with epoxy‐EPU matrix.

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“…Only a very low content (0.40 wt%) of POSS hybrid nanomaterials in the lubricant oil could achieve very low friction coefficients (0.099). The fundamental friction reducing mechanism was attributed partly to the stable POSS films formed on the frictional surface …”

Section: Advanced Applicationsmentioning

confidence: 99%

“…The fundamental friction reducing mechanism was attributed partly to the stable POSS films formed on the frictional surface. [90] POSS also could be incorporated into polymers to protect satellites and other spacecraft in low earth orbit. Nouranian et al first grafted PI onto the POSS nanoparticles and then dispersed them in the PI matrix to form nanocomposites.…”

Section: Enhancement Of Other Properties Of Polymersmentioning

confidence: 99%

Silsesquioxane‐Containing Hybrid Nanomaterials: Fascinating Platforms for Advanced Applications

Dong

2019

Macro Chemistry & Physics

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Silsesquioxanes (SSQs), with the general formula, (RSiO1.5)n—where R stands for an organic group, such as alkyl, aryl, alkoxy, or H—are a type of molecular‐level organic/inorganic hybrid silica‐based material. These materials contain reactive or nonreactive organic moieties as well as inorganic Si–O–Si frameworks. In the past few years, extensive efforts have been made using SSQs to construct multifunctional nanocomposites with suitable properties for a range of applications. In this review, the recent various applications of SSQ‐containing hybrid materials are discussed, in addition to updates of the nanocomposite applications. Various physical structures and chemical reactions in SSQ‐based hybrid nanomaterials are emphasized with regard to applications in the field of polymer nanocomposites, catalysts, adsorption, sensors, and biomedicine. This review focuses on results reported in the recent five years (2013–2018).

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Novel POSS based nanohybrids for improving tribological properties of liquid paraffin

Abstract: POSS based nanohybrids were prepared via “thiol–ene click” reaction. As a novel additive, they are effective for improving the tribological properties at rather a low concentration when compared with pure solid or liquid lubricating additives.

Cited by 9 publications

References 36 publications

Controllable synthesis of different morphologies of CuO nanostructures for tribological evaluation as water-based lubricant additives

Controllable synthesis of different morphologies of CuO nanostructures for tribological evaluation as water-based lubricant additives

Thermal, mechanical, and tribological properties of epoxy polymer/EPU blends reinforced by low concentration of octaaminophenyl POSS

Silsesquioxane‐Containing Hybrid Nanomaterials: Fascinating Platforms for Advanced Applications

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