Multifunctional lubricant additive derived from polyisobutylene succinimide dispersant

Wang, Shengpei; Yu, Shasha; Feng, Jianxiang; Liu, Shenggao

doi:10.1080/01932691.2020.1729172

Cited by 7 publications

(2 citation statements)

References 49 publications

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“…Although classified as a polyolefin, polyisobutylene (PIB) is highly regarded for its exceptional thermo-oxidative stability, strong chemical resistance, and impermeability . Owing to these remarkable properties, PIB-based materials have been widely applied to lubricant additives, , thermoplastic elastomers, , and pressure-sensitive adhesives . Furthermore, because chemically inert repeating units on PIB can prevent the enzymatic degradation and attacks by the immune system, PIB-based materials also exhibit both excellent biocompatibility and biostability and are, thus, widely used in biomedical research. − …”

Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Ring-Opening Polymerization-Induced Self-Assembly Using Crystallizable Polylactones as Core-Forming Blocks

et al. 2023

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Ring-opening polymerization-induced self-assembly (ROPISA) was achieved by employing hydroxyl-terminated polyisobutylene (PIB-OH), diphenyl phosphate (DPP), cyclohexane, and ε-caprolactone (ε-CL) and/or δ-valerolactone (δ-VL) as the stabilizer/macroinitiator, catalyst, solvent, and monomers, respectively. ROPISA has enabled the introduction of biodegradable, biocompatible, and crystallizable polylactones to nanoparticles and related materials. The polymerization temperatures (20, 50, or 80 °C) had an important effect on the crystallization behavior and corresponding self-assembly of PIB-b-PCL and PIB-b-PVL. The highest temperature (80 °C) interfered with the crystallization and in situ fixation, which readily reorganized nanoparticles and formed either spherical micelles or a precipitate. However, at the lowest temperature (20 °C), fibrillar nanoparticles were gradually formed and stabilized according to the classical polymerization-induced self-assembly (PISA) mechanism. Furthermore, temperature adjustment altered the monomer sequence in the P(CL-co-VL) block and the subsequent crystallization and self-assembly. At 80 °C, the P(CL-co-VL) block formed a weakly crystallized random structure, which generated spherical micelles. By contrast, at 20 °C, ROPISA favored the generation of P(CL-co-VL) containing a quasi-block sequence, resulting in the acquisition of fibrillar micelles. Interestingly, at different polymerization temperatures, nanoparticles exhibited different morphologies, even when the compositions were similar. The results of this study revealed that ROPISA provided a feasible alternative to PISA for synthesizing nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Ring-Opening Polymerization-Induced Self-Assembly Using Crystallizable Polylactones as Core-Forming Blocks

et al. 2023

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“…With the help of the polar head part, they can connect to insoluble particles and various metal surfaces, and the apolar tail part ensures hydrocarbon solubility. In addition, after binding to the surface and insoluble particles, the dispersant prevents the deposition of pollutants and the formation of larger agglomerations [6]. Willermet presented the effect of various detergent and dispersant (including PIBSI) motor oil additives on each other.…”

Section: Introductionmentioning

confidence: 99%

Tribological Investigation of the Effect of Nanosized CuO and TiO2 on a Base Oil Containing Komad 323 Dispersant

Szabó,

Marsicki,

Hargitai

2023

Preprint

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In this article, copper(II) oxide and titanium dioxide nanoparticles were added to Group III base oil formulated with 8 wt% Komad 323 dispersant. The nanoparticles were treated with ethyl oleate surface modification. The tribological properties of the homogenized oil samples were tested on a linear oscillating tribometer with continuous monitoring of static friction. Friction absolute integral values were calculated from high data acquisition. The wear was evaluated using a digital optical and confocal microscope. The wear types were characterized with scanning electron microscopy, while the remaining additives were located and quantified with energy-dispersive X-ray spectroscopy. The measurement results show that the CuO nanoparticles did not work well with the Komad 323 dispersant. As a result of their antagonistic effect, in the case of low CuO concentrations (≤0.3 wt%), the friction increased, while in the case of high concentrations (≥0.4%), surface fatigue caused a high wear rate. The cooperation between TiO2 and the dispersant showed synergistic effects. The oxygen-rich boundary layer formed on the worn surface with a titanium content of 0.33-0.39 norm.wt% provides both lower friction and high wear resistance.

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Extending Applicability of Amino‐Functionalized Silica Nanoparticle as Poly‐Alpha‐Olefin Additive for Different Metal–Metal Sliding Pairs via Secondary Surface‐Capping by Polyisobutylene Succinic Anhydride

Yao,

Fan,

Song

et al. 2024

Lubrication Science

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The tribological properties of lubricants containing the same additives often vary with varying hardness and composition of the frictional parts. This means that, in terms of the effectiveness of lubricant additives, most of current researches using GCr15 steel to assemble the frictional pair could not be directly cited by the moving parts made of other materials. Aiming at verifying if RNS‐1A‐PIBSA (referring to amino‐functionalized silica nanoparticle [RNS‐1A] after secondary surface‐capping by polyisobutylene succinic anhydride [PIBSA]) is suitable for multiple frictional parts made of different materials with varying hardness and composition, herein we investigate its applicability an additive in poly‐alpha‐olefin 6 (PAO6) base oil to three types of sliding pairs constructed from GCr15 steel, #45 steel, and ductile iron with much different hardness and composition by SRV‐5. A series of analyses of worn surface morphology and composition demonstrate that, independent of the composition and hardness of the frictional pairs, RNS‐1A‐PIBSA added in PAO6 base oil can form silica deposition film on the rubbed surfaces of the three kinds of sliding pairs, thereby effectively reducing friction and wear. Besides, we also examine the effect of RNS‐1A‐PIBSA on the thermal stability of the PAO6 base oil, and found the nano‐additive RNS‐1A‐PIBSA can delay the thermal decomposition of PAO6 base oil to some extent, which is favourable for its application in lubrication engineering.

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Multifunctional lubricant additive derived from polyisobutylene succinimide dispersant

Cited by 7 publications

References 49 publications

Temperature-Dependent Ring-Opening Polymerization-Induced Self-Assembly Using Crystallizable Polylactones as Core-Forming Blocks

Temperature-Dependent Ring-Opening Polymerization-Induced Self-Assembly Using Crystallizable Polylactones as Core-Forming Blocks

Tribological Investigation of the Effect of Nanosized CuO and TiO2 on a Base Oil Containing Komad 323 Dispersant

Extending Applicability of Amino‐Functionalized Silica Nanoparticle as Poly‐Alpha‐Olefin Additive for Different Metal–Metal Sliding Pairs via Secondary Surface‐Capping by Polyisobutylene Succinic Anhydride

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