Gemini Ionic Liquids Research Articles

Qualifying interfacial properties of crude oil−water system with the synergistic action of a nano Gemini ionic liquid and conventional surfactants

Surface-active ionic liquids (SAILs) have gained much attention due to their green, stable, and efficient properties. The high costs associated with SAILs have raised concerns in their applications; however, blending with conventional surfactants like sodium dodecyl benzene sulfonate (SDBS) can bring about desired outcomes. Gemini surface-active ionic liquids (GSAILs) have been recognized as more efficient surfactants. Accordingly, this study investigates the influence of a mixture of an imidazolium-based GSAIL, [C4im-C6-imC4][Br2], and SDBS on different aspects of crude oil−water interfacial properties. The findings show remarkable synergy in interfacial tension (IFT) reduction up to 98.8% together with incredibly low IFT value of 0.05 mN m−1. This was with an optimal GSAIL mole fraction of 0.2 in the mixture. Further, the surfactant mixture gives synergies of 52.6% in emulsification and 51.8% in wettability of a quartz surface. These amazing results can be explained by the dominant interactions between the oppositely charged components. In theoretical study, the adsorption of individual surfactants and their mixtures was analyzed based on the Frumkin isotherm and the Rosen model, respectively, further supporting the findings.

An electrochemical, and surface studies of synthesized Gemini ionic liquid as corrosion inhibitor for carbon steel in petroleum field

In this work, we study the efficiency of N1, N3-dibenzyl-N1, N1, N3, N3-tetramethylpropane-1,3-diaminium chloride, as anticorrosion. This compound exhibits potential as a prospective remedy to stop the deterioration of carbon steel caused by corrosion in 1.0 M HCl. The synthesis of this compound is described in a comprehensive manner, and its composition is supported by a range of precise analytical approaches such as elemental analysis, and mass spectroscopy. Based on the findings of the investigation, the synthesized Gemini ionic liquid demonstrates a robust capacity to slow down the rate at which the metal corrodes. The Prepared compound was evaluation by electrochemical and morphology study. Our results revealed that elevating the inhibitor concentration led to an augmentation in inhibition effectiveness, reaching up to 94.8% at 200 ppm of the synthesized compound at 298 K. It is crucial to emphasize that the recently prepared Gemini ionic liquid is consistent with the Langmuir adsorption model and function as a mixed inhibitor, participating in the physio-chemisorption process of adsorption.

Effective Synergistic Action of Benzimidazolium Nano Gemini Ionic Liquid and Conventional Surfactant for Chemical Enhanced Oil Recovery.

Blends of newly developed Gemini surface-active ionic liquids (GSAILs) and conventional surfactants offer significant enhancements to the interfacial properties between crude oil and water, providing economic benefits in chemically enhanced oil recovery. In this study, the mixtures of a benzimidazolium cationic GSAIL, [C4benzim-C6-benzimC4][Br2], and sodium dodecyl benzenesulfonate (SDBS) were successfully utilized for improving crude oil-water interfacial properties. The research revealed synergistic effects of up to 99.6% in reducing interfacial tension (IFT), achieving a low IFT value of 0.04 mN m-1 corresponding to an optimal GSAIL mole fraction of 0.2 for the mixture of surfactants. Additionally, significant synergies of 53.4 and 74% were observed in oil-water emulsification and in surface wettability when using a GSAIL mole fraction of 0.2. These results showcase the importance of the dominant interaction between the opposite-charged surfactants. The Frumkin isotherm and the Rosen model were employed for the theoretical study of adsorption behavior of individual surfactants and their mixture at the interface, demonstrating reasonable parameter variations. The overall findings emphasize the potential of utilizing these unique blends to enhance oil recovery processes through tailored interfacial properties.

Synergism in mixtures of nano benzimidazolium Gemini ionic liquid and sodium dodecyl sulfate surfactants in tuning interfacial properties of crude oil−water system

The high price of newly explored surfactants is a concern in applications, but their mixture with conventional surfactants can bring about desired outcomes. Gemini surface active ionic liquids (GSAILs) have emerged as unique materials in tuning interface properties. Surfactants like sodium dodecyl sulfate (SDS), on the other hand, are known effective and commercially available. This study investigates the simultaneous effects of a benzimidazolium cationic GSAIL, [C4benzim-C6-benzimC4][Br2], and SDS surfactants on the interfacial tension (IFT), emulsification, and wettability alteration of the crude oil−water system. The results demonstrate amazing synergies up to 97.6 % in the IFT reduction. An ultra-low IFT of 0.16 mN·m−1 was achieved with an optimum GSAIL mole fraction of 0.4, attributed to the attractive interaction between the cationic GSAIL and the anionic SDS. Mixtures also give 54.3 and 72.8 % synergies in emulsification and wettability alteration, respectively. The adsorption of individual and mixture of surfactants were theoretically analyzed using the Frumkin adsorption isotherm and the non-ideal interactions of the binary mixtures (NIBM) theory. The corresponding determined parameters were consistent. To have a more comprehensive analysis, the results were compared with those obtained with an analogous structure imidazolium GSAIL.

Synthesis and demulsification performance of a Gemini ionic liquid with dual cationic active centers

Currently, widely-used demulsifiers are primarily produced using ethylene oxide and propylene oxide as raw ingredients. The production process is hazardous and complicated, and the demulsification temperature for crude oil emulsions is typically above 60 ℃. In this work, an efficient Gemini ionic liquid demulsifier (Y12) with dual cationic active centers was prepared using a one-pot synthesis route. The structure of demulsifiers was analyzed by FTIR and 1H NMR spectroscopy. The bottle test was utilized to assess the demulsification performance. The results revealed that the demulsification efficiency (DE) of Y12 could achieve 100 % at a concentration of 400 mg/L under 50 ℃ for 120 min. Emulsion with different oil content were treated with Y12 at different temperatures, the DE of C30 and C70 emulsions reached 100% at temperature of 50 ℃ and 70 ℃, respectively. Furthermore, Y12 exhibited effectiveness across a wide range of pH value and high salinity conditions. To further confirm the demulsification of Y12, some commercial demulsifiers were used for comparison. It was observed that Y12 had better performance than commercial demulsifiers, indicating its promising potential for applications. The demulsification mechanism was investigated through relative solubility numbers (RSN), interfacial tension (IFT), three-phase contact angle (TCA), zeta potential, and coalescence time of water droplets (CTW). Especially, to further investigate the demulsification mechanism of Y12 demulsifier, Y8 and Y16 with different lengths of hydrophobic chains were also prepared and used for comparison. Y12 had an excellent interfacial activity and strong capability of reducing interfacial tension, which facilitates the formation of an unstable composition interfacial film and results in the oil–water separation.

A gemini ionic liquid and its low-temperature demulsification performance in water-in-crude oil emulsions

In the demulsification process of crude oil emulsions, the temperatures of above 60 °C are most commonly required. In this work, a gemini ionic liquid (PGE-TFA) with amphipathy and interfacial activity was prepared by a simple and safe method, which could be used at the temperature of 40 °C for the effective demulsification of crude oil emulsions. The chemical structure and thermostability was investigated by FTIR, 1HNMR and TGA. The demulsification tests of PGE-TFA showed that it had higher demulsification efficiency (DE) and faster demulsification rate than common commercial demulsifiers. PGE-TFA could be used at a low temperature of 40 °C, a wide pH range and high salinity. The DE reached as high as 95.53 % in water-in-oil emulsions with the concentration of 500 mg/L at 40 °C for 90 min. The temperature of 70 °C could slightly increase the DE and significantly improve the demulsification rate, and the DE of 97.72 % was obtained with the same concentration for 30 min. In addition, the demulsification mechanism was investigated by dynamic interfacial tension, competitive adsorption and zeta potential. The results displayed that PGE-TFA had amphipathy and interfacial activity, which promoted it quickly diffuse to the oil-water interface and displace asphaltenes at the interface. Therefore, an unstable composite film could be formed at the interface and the interfacial tension was lowered, which induced the demulsification of the emulsions.

Novel Gemini ionic liquid for oxidative desulfurization of gas oil

The N1,N1,N3,N3-tetramethyl –N1,N3-diphenylpropane-1,3-diaminium dichloride ionic liquid (ILc) is an environmentally friendly catalyst for oxidative–extractive desulfurization of gas oil (sulfur content = 2400 ppm) in the presence of H2O2 as an oxidizing agent. The precise structure of the prepared IL was confirmed using FT-IR spectroscopy, and1H-NMR. The reaction temperature, IL ratios, H2O2 dosage, and reaction time were studied to assess their effects on the desulfurization efficiency. The thermodynamic parameters of the oxidation reaction were determined. A desulfurization efficiency of 84.7% was obtained after the extractive desulfurization process using acetonitrile as an organic solvent at a solvent to feed ratio of 1:1 (v/v). Furthermore, the prepared IL may be reused for at least six cycles without any significant change in its desulfurization performance or chemical structure, which confirms its high reusability.

Water-in-salt electrolytes made saltier by Gemini ionic liquids for highly efficient Li-ion batteries

The water-in-salt electrolytes have promoted aqueous Li-ion batteries to become one of the most promising candidates to overcome safety concerns/issues of traditional Li-ion batteries. A simple increase of Li-salt concentration in electrolytes can successfully expand the electrochemical stability window of aqueous electrolytes beyond 2 V. However, necessary stability improvements require an increase in complexity of the ternary electrolytes. Here, we have explored the effects of novel, Gemini-type ionic liquids (GILs) as a co-solvent systems in aqueous Li[TFSI] mixtures and investigated the transport properties of the resulting electrolytes, as well as their electrochemical performance. The devices containing pyrrolidinium-based GILs show superior cycling stability and promising specific capacity in the cells based on the commonly used electrode materials LTO (Li4Ti5O12) and LMO (LiMn2O4).

Enhanced the permeability of water invasion sandstone by effectively inhibiting the swelling and dispersion of montmorillonite

The long-term effect of protecting water-sensitive reservoirs and enhancing permeability of water invasion reservoir is still an urgent practical problem to be solved. Here, an imidazolium Gemini ionic liquid (IL), PEG-DC8Im, with octyl as tail chain and polyoxyethylene chain as bridging group, was synthesized to inhibit the hydration, swelling and dispersion of clay minerals. The PEG-DC8Im could exert excellent anti-swelling ability (93.82 %) and outstanding washable capacity (cumulative decrease of anti-swelling rate after being washed five times: 1.32 %) at the concentration of 60 mmol/L. The inhibition effect of 20 mmol/L PEG-DC8Im was significantly better than that of 250 mmol/L KCl at 90 °C. And the PEG-DC8Im could intercalate into the interlayer space of MMT through cation exchange to play an inhibition effect, where zeta potential of MMT particles was reduced and then the dispersion ability of MMT was weakened. Subsequently, the anionic polymer poly(AM/AA) was found to cooperate with PEG-DC8Im to improve the inhibition effect for MMT swelling and dispersion, in which poly(AM/AA) was not intercalated into the interlayer of MMT, and only adsorbed on the surface of the particles to encapsulate the MMT particles. Simultaneously, the apparent viscosity and thixotropy of the composite solution were enhanced. Besides, after the treatment of PEG-DC8Im, the displacement pressure decreased and the permeability of sandstone cores increased due to the inhibition of clay mineral hydration, revealing the enhancement of injectivity. Finally, the pore connectivity of the core increased and the water wettability was weakened. The treatment of PEG-DC8Im was conducive to the discharge of invasive water in reservoir and the improvement of the reservoir permeability. Overall, PEG-DC8Im has a good application prospect as permeability-enhancing clay stabilizers.

A comparative study on the design and application of new nano benzimidazolium gemini ionic liquids for curing interfacial properties of the crude oil-water system.

Gemini surface active ionic liquids (GSAILs) are considered a new prosperous class of ionic liquids and recognized as high performance materials. The present study explores the capabilities of the newly synthesized GSAILs, constructed from two benzimidazole rings attached via a four or a six carbon spacer, namely [C4benzim-Cn-benzimC4][Br2], n = 4 and 6. The products were characterized with FT-IR, NMR, XRD, TGA, DTG and SEM methods and were used in curing interfacial properties of the crude oil-water system. The interfacial tension (IFT) was reduced to about 64 and 71% under critical micelle concentrations (CMCs) of 0.028 and 0.025 mol dm-3 at 298.2 K for n = 4 and 6 GSAILs, respectively. Temperature significantly assisted this effect. Both the GSAILs could transfer the wettability of the solid surface from oil-wet to water-wet. Further, stable oil/water emulsions were produced, having emulsion indices of 74.2 and 77.3% for n = 4 and 6 GSAILs, respectively. Compared to homologous imidazolium GSAILs, the benzimidazolium products revealed better performance in the sense of exhibiting desired effects on the investigated interfacial properties. These can be attributed to the stronger hydrophobicity of the benzimidazolium rings as well as better spreading of the molecular charges. The Frumkin isotherm could exactly reproduce the IFT data, leading to precise determination of the important adsorption and thermodynamic parameters.

Nanocellulose-Based Polymer Composites Functionalized with New Gemini Ionic Liquids.

The manuscript discusses the application of dimeric imidazolium ionic liquids with an aliphatic linker of different lengths, constituting a new class of compounds called gemini, for the modification of renewable materials. This innovative functionalization with the use of ionic liquids made it possible to obtain polymer composite nanomaterials with renewable fillers, which will reduce the consumption of petroleum-based raw materials and also be directly related to the reduction of energy intensity. Renewable filler in the form of nanocellulose modified with ionic liquids, as well as polymer composites with such filler obtained by extrusion and injection molding techniques, were subjected to detailed characterization using techniques like: X-ray diffraction (XRD), Fourier transform spectroscopy (FTIR), dispersion studies (DLS), morphological analysis (SEM), differential scanning calorimetry (DSC), hot-stage polarized light microscopy and characterization of mechanical properties. The use of innovative dimeric ionic liquids proved to be an effective method to carry out efficient functionalization of cellulose. This provided a stable space structure between polysaccharide particles, limiting aggregate formation. It was shown that chemical modification with ionic liquids has a significant effect on the nucleation activity of cellulose fillers and the formation of the supermolecular structure of the polymer matrix, which consequently allowed to obtain polymer composites with excellent strength characteristics and increased flexibility, which will allow to increase their application potential. Innovative ionic liquids have contributed to obtaining green nanomaterials with excellent functional properties, which have not been described in the literature so far.

Surface adsorption and bulk properties of polyoxyethylene–polyoxypropylene random copolymer-type double-chained surfactants in quaternary-ammonium-salt-type amphiphilic gemini ionic liquids

Recently, a few studies have been reported on the layer structure of ionic liquids using X-ray and neutron scattering. However, the nanostructural features of ionic liquids remain unclear. Herein, the surface adsorption and bulk properties of polyoxyethylene (EO)–polyoxypropylene (PO) decyl tetradecyl ether-type nonionic surfactants (C10-C12POxranEO24PO13−x, where x represents the length of the PO chain linked to alkyl chains; x = 0, 5, 8, and 13) in quaternary-ammonium-salt-type amphiphilic gemini ionic liquids containing oxygen or nitrogen in the spacer (2C12(Spacer) NTf2, where (Spacer) = (2-O-2), (2-O-2-O-2), (2-N-2), (2/2-N-2), and n represents the alkyl chain length; n = 10, 12, and 14 for the 2-O-2 spacer, and n = 12 for all others) are elucidated by surface tension, small- and wide-angle X-ray scattering, and viscosity measurements. The surface tension of the C10-C12POxranEO24PO13−x surfactants in the gemini ionic liquids containing oxygen in the spacer increased as the surfactant concentration increased, and it became comparable to that of C10-C12POxranEO24PO13−x alone, indicating that the gemini ionic liquid adsorbed at the air–liquid interface was replaced with C10-C12POxranEO24PO13−x following its addition. In the bulk, 2Cn(Spacer) NTf2 and C10-C12POxranEO24PO13−x formed a layered structure, and the layer spacing depended on the alkyl chain length and spacer structure of the gemini ionic liquid and the length of the PO chain linked to the alkyl chains of the surfactants.

Demulsification of amphiphilic gemini ionic liquids and its demulsification mechanism

This work aims to prepare two new amphiphilic and interfacial active gemini ionic liquids to treat crude oil and investigates its demulsification mechanism. Tetraethylene glycol was pretreated with thionyl chloride and used as a linker to connect succinimide or phthalimide, and then reacted with dodecyl benzene sulphonic acid to obtain the corresponding amphiphilic and interfacial active gemini ionic liquid STA or PTA, respectively. 1H nuclear magnetic resonance spectroscopy (1HNMR) and Fourier-transform infrared spectroscopy (FTIR) was used to determine the chemical structures. The demulsification tests showed the demulsification efficiency with 150 mg/L of STA or PTA at 60 °C for 30 min was 99.89% and 99.79%, respectively. Furthermore, the demulsification mechanism of STA and PTA were studied and the prominent demulsification ability of STA and PTA were attributed to the better interfacial activity and amphipathy which could destroy the asphaltenes interfacial film. These results showed that STA and PTA had excellent demulsification efficiency, which promised application in petroleum industry.

Gemini ionic liquid modified nacre-like reduced graphene oxide click membranes for ReO4−/TcO4− removal

99Technetium (99Tc), as a kind of dangerous radioactive isotopes, captured from groundwater is an extremely urgent problem. A functionalize graphene oxide flexible membrane (GO-C6) was successfully obtained using thiol-ene click reaction, where CC bond of graphene network can further to connect to the gemini ionic liquids. The click membranes modified by Gemini C4 IL, Gemini Ph IL or Gemini C6 IL exhibited different adsorption capacity for ReO4− /TcO4−, where it enhanced with the increase of number of the alkyl chains C1, C4, C6 in the corresponding structure of GO-Ph, GO-C4, GO-C6. The maximum adsorption capacity of GO-C6 at pH 3, pH 4, pH 6 and pH 10 was evaluated as 269.17 mg g−1, 246.36 mg g−1, 252.55 mg g−1, and 238.67 mg g−1, respectively. In addition, the stable removal efficiency was verified through regenerative and selective experiment in the presence of competing anions, including Cl−, SO42−, NO3–, and PO43− in certain nuclear waste. The ion exchange reaction between ReO4− /TcO4− and Cl− on the imidazolium modified GO membranes played dominant role in the adsorption mechanism. In short, reduced graphene oxide click membranes modified by gemini ionic liquid showed good application prospects in removal of radioactive 99Tc.

Stable dispersibility of bentonite-type additive with gemini ionic liquid intercalation structure for oil-based drilling

In this study, the direct intercalation of gemini ionic liquids (ILs) with different alkyl chains into the bentonite (BT) interlayer as a high-performance lubricating additive for base oil 500SN was investigated. The purpose of modifying BT with an IL is to improve the dispersion stability and lubricity of BT in lubricating oil. The dispersibility and tribological properties of IL—BT as oil-based additives for 500SN depend on the increase in interlamellar space in BT and improve as the chain length is increased. More importantly, the IL—BT nanomaterial outperforms individual BT in improving wear resistance, owing to its sheet layers were deformed and sprawled in furrows along the metal surface, thereby resulting in low surface adhesion. Because of its excellent lubrication performance, IL-modified BT is a potential candidate for the main component of drilling fluid. It can be used as a lubricating additive in oil drilling and oil well construction to reduce equipment damage and ensure the normal operation of equipments.

Preparation and Adsorption Properties of MCM-41 with Novel Gemini Ionic Liquid Surfactants as Template

A mesoporous molecular sieve was prepared by the hydrothermal synthesis method with symmetric Gemini surfactant 1,3-bis(hexadecyldimethylammonio)-propane dibromide, symmetric Gemini ionic liquid surfactant 1,3-bis(3-hexadecylimidazolium-1-yl) propane dibromide and self-designed asymmetric Gemini ionic liquid surfactant 1-(3-(hexadecyldimethylammonio)prop-1-yl)-3-hexadecylimidazolium dibromide as the template agent. The structure characterization results for mesoporous molecular sieves show that the material possesses a hexagonal pore structure with uniform channels. The mesoporous silica that was synthesized with self-designed asymmetric Gemini ionic liquid surfactant as the template agent possesses the largest surface area and its pore size and specific surface area are, respectively, 3.28 nm and 879.37 m2/g. The adsorption properties of the prepared MCM-41 for crystal violet were investigated, and the adsorption thermodynamics and kinetics were investigated. The results show that adsorption equilibrium can be reached under pH = 9 and 35 °C for 50 min, and the quantity of adsorption can reach up to 464.21 mg/g. The adsorption process belongs to Langmuir isothermal adsorption, conforming to second-order adsorption kinetics, and the adsorption process is an endothermic process.

Imidazolium Gemini ionic liquids for regulating facilely the swelling and dispersion of montmorillonite in water

The imidazolium Gemini ionic liquids (IL), with alkyl groups ranging from butyl to tetradecyl as tail chains and polyoxyethylene group as linker chain, were synthesized and used as novel efficient modifiers for flexibly controlling the swelling and dispersion of Na-montmorillonite (NaMt). The correlation between swelling behavior and structure of imidazolium Gemini IL was investigated. Too long or too short tail chains caused greater swelling, obtaining smaller particle size and reductive face-to-face stacking degree of layers. Based on the change of water contact angles, the increased stability of modified Mt in water indicated that the hydrophobicity of the tail chains played an important role in impeding the entry of water molecules into the interlayer. Zeta potential, Fourier transform infrared spectra and X-ray photoelectron spectroscopy validated the cation exchange between imidazolium Gemini IL and Na+, and confirmed the adsorption site. The molecular arrangement and intercalation were determined through adsorption behavior, interlayer space of Mt and simulation of molecular size. The imidazolium Gemini IL covered the Mt layers in monolayer, finally taking lateral (short tail chains) or paraffin (long tail chains) arrangement. The investigation will provide useful guidance for modifying Mt to obtain desirable properties and broadening the practical application of Mt hybrids.

New small gemini ionic liquids for intensifying adsorption and corrosion resistance of copper surface in sulfuric acid solution

In this study, three new gemini ionic liquids (GILs 1–3) were designed and prepared. The results showed that the GILs could undergo orderly molecular aggregation in sulfuric acid solution, which reached a steady aggregation state at 0.050 mM with 8 h evolving time. The tough chemical adsorption of the GILs aggregates on copper surface was confirmed by different means such as X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD), which could be formed by the Cu(I)-GILs coordination complexes. The yielded hydrophobic self-assembled monolayers (SAMs) adsorption of the GILs aggregates on copper surface were demonstrated by the measurements of spectroscopic ellipsometry and contacting angles (such as the GIL 3, the adsorption layer thickness, 5.70 nm, the contacting angle, 124.5 °). The copper corrosion inhibition effects of the GILs in sulfuric acid solution were measured by the electrochemistry analysis. The obtained results show the GIL 3 achieved over 96% corrosion inhibition efficiency at 0.050 mM based on electrochemical impedance spectroscopy (EIS). The decrease of charge transfer as well as the increase of double layer capacitance may make major contributions in copper corrosion resistance. The adsorption behavior of the GILs aggregates on the Cu surface was found to obey the Langmuir isotherm plots. In further consideration of the other advantages of the target GILs such as water solubility, negligible toxicity as well as easy preparation based on commercial starting materials, a large application potential could be expected.

Layer structure of quaternary-ammonium-salt-type amphiphilic gemini and trimeric ionic liquids

The layered structures formed by quaternary-ammonium-salt-type amphiphilic ionic liquids, including monomeric, identical and nonidentical alkyl chain-containing gemini, and star- and linear-structured three alkyl chain-containing trimeric types, were investigated by wide-angle X-ray scattering. A polyoxyethylene-type nonionic surfactant (C12EO6) was added to these amphiphilic ionic liquids, and the resulting layered structures were also elucidated. The spacing of the layers of the amphiphilic gemini ionic liquids increased with increasing fixed alkyl chain length in the two alkyl chains and differed according to the degree of alkyl chain dissymmetry. Amphiphilic trimeric ionic liquids displayed smaller layer spacings in linear structures than star structures, suggesting that the alkyl chains in the latter are loosely packed in layers due to the flexible spacer radiating from a central tertiary amine. Conversely, the alkyl chains in the linear structures are orderly and densely packed due to their close proximity. The addition of C12EO6 to the amphiphilic gemini and trimeric ionic liquids led to more ordered layers formed by the hydrophobic moiety, whereby the order decreased with increasing C12EO6 concentration.

Corrosion and lubrication properties of a halogen-free Gemini room-temperature ionic liquid for titanium alloys

A halogen-free Gemini ionic liquid (IL N18-2-18P8) was designed and synthesized by combining dis-quaternary ammonium cations with phosphate ester anions. The tribological and corrosion performance of the N18-2-18-P8 was compared with that of a polymerized alpha olefin (PAO) and traditional halogen ionic liquid (P104) as a lubricant for titanium alloy sliding against steel. The results show the N18-2-18P8 presents the highest kinematic viscosity but lower friction coefficient (FC) and higher anti-wear (AW) than P104 and PAO. Simultaneously, N18-2-18P8 also negligibly corrodes the titanium at room temperature (RT) and 100 °C (HT). The corrosion characteristics, friction and wear mechanisms were analyzed by FC measurements, SEM, EDS, XPS, and TOF-SIMS.