Effect of sulfur on the hydrolytic stability and tribological properties of N-containing borate ester

Yinglei Wu; Emile van der Heide; Zhongyi He

doi:10.1016/j.wear.2022.204433

Effect of sulfur on the hydrolytic stability and tribological properties of N-containing borate ester

Yinglei Wu^*
, Emile van der Heide
, Zhongyi He

^*Corresponding author for this work

Surface Technology and Tribology

Research output: Contribution to journal › Article › Academic › peer-review

28 Citations (Scopus)

599 Downloads (Pure)

Abstract

Two borate esters, one with benzotriazole (BTB) and another with 2-mercaptobenzothiazole (BMB) were synthesized and used as additives in mineral oil. BMB showed better hydrolysis stability, probably because S atoms in BMB provided negative charges to the N to enhance B←N coordination. Moreover, BMB was superior in terms of improving P_B value, anti-wear and friction-reducing properties of mineral oil. XPS spectra revealed that h-BN, B₂O₃ and Fe_xO_y were detected in BTB-tribofilm, while additional FeSO₄, FeS and B₂S₃ were found in BMB-tribofilm. The possible triple effects of S atoms in BMB can be summarized as: enhancing the B←N coordination; improving the adsorption ability of BMB on the metal surface; and generating tribochemical reaction products with tribological effects.

Original language	English
Article number	204433
Journal	Wear
Volume	504-505
Early online date	5 Jul 2022
DOIs	https://doi.org/10.1016/j.wear.2022.204433
Publication status	Published - 15 Sept 2022

Keywords

Hydrolysis stability
N-containing borate ester
Quantum chemical computations
Tribological mechanisms
22/3 OA procedure

Access to Document

10.1016/j.wear.2022.204433

1-s2.0-S0043164822001922-mainFinal published version, 9.42 MBLicence: Taverne

Cite this

@article{b5703fe5143c4db3b6cc64ee729e6ef0,

title = "Effect of sulfur on the hydrolytic stability and tribological properties of N-containing borate ester",

abstract = "Two borate esters, one with benzotriazole (BTB) and another with 2-mercaptobenzothiazole (BMB) were synthesized and used as additives in mineral oil. BMB showed better hydrolysis stability, probably because S atoms in BMB provided negative charges to the N to enhance B←N coordination. Moreover, BMB was superior in terms of improving PB value, anti-wear and friction-reducing properties of mineral oil. XPS spectra revealed that h-BN, B2O3 and FexOy were detected in BTB-tribofilm, while additional FeSO4, FeS and B2S3 were found in BMB-tribofilm. The possible triple effects of S atoms in BMB can be summarized as: enhancing the B←N coordination; improving the adsorption ability of BMB on the metal surface; and generating tribochemical reaction products with tribological effects.",

keywords = "Hydrolysis stability, N-containing borate ester, Quantum chemical computations, Tribological mechanisms, 22/3 OA procedure",

author = "Yinglei Wu and \{van der Heide\}, Emile and Zhongyi He",

note = "Funding Information: The authors would like to thank the financial support from Shanghai University of Engineering Science and the National Natural Science Foundation of China ( 51965020 ). The authors are also grateful to the Beijing synchrotron radiation facility and Shanghai Jiao tong University for their technical support. Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = sep,

day = "15",

doi = "10.1016/j.wear.2022.204433",

language = "English",

volume = "504-505",

journal = "Wear",

issn = "0043-1648",

publisher = "Elsevier",

}

TY - JOUR

T1 - Effect of sulfur on the hydrolytic stability and tribological properties of N-containing borate ester

AU - Wu, Yinglei

AU - van der Heide, Emile

AU - He, Zhongyi

N1 - Funding Information: The authors would like to thank the financial support from Shanghai University of Engineering Science and the National Natural Science Foundation of China ( 51965020 ). The authors are also grateful to the Beijing synchrotron radiation facility and Shanghai Jiao tong University for their technical support. Publisher Copyright: © 2022 Elsevier B.V.

PY - 2022/9/15

Y1 - 2022/9/15

N2 - Two borate esters, one with benzotriazole (BTB) and another with 2-mercaptobenzothiazole (BMB) were synthesized and used as additives in mineral oil. BMB showed better hydrolysis stability, probably because S atoms in BMB provided negative charges to the N to enhance B←N coordination. Moreover, BMB was superior in terms of improving PB value, anti-wear and friction-reducing properties of mineral oil. XPS spectra revealed that h-BN, B2O3 and FexOy were detected in BTB-tribofilm, while additional FeSO4, FeS and B2S3 were found in BMB-tribofilm. The possible triple effects of S atoms in BMB can be summarized as: enhancing the B←N coordination; improving the adsorption ability of BMB on the metal surface; and generating tribochemical reaction products with tribological effects.

AB - Two borate esters, one with benzotriazole (BTB) and another with 2-mercaptobenzothiazole (BMB) were synthesized and used as additives in mineral oil. BMB showed better hydrolysis stability, probably because S atoms in BMB provided negative charges to the N to enhance B←N coordination. Moreover, BMB was superior in terms of improving PB value, anti-wear and friction-reducing properties of mineral oil. XPS spectra revealed that h-BN, B2O3 and FexOy were detected in BTB-tribofilm, while additional FeSO4, FeS and B2S3 were found in BMB-tribofilm. The possible triple effects of S atoms in BMB can be summarized as: enhancing the B←N coordination; improving the adsorption ability of BMB on the metal surface; and generating tribochemical reaction products with tribological effects.

KW - Hydrolysis stability

KW - N-containing borate ester

KW - Quantum chemical computations

KW - Tribological mechanisms

KW - 22/3 OA procedure

UR - https://www.scopus.com/pages/publications/85133839260

U2 - 10.1016/j.wear.2022.204433

DO - 10.1016/j.wear.2022.204433

M3 - Article

AN - SCOPUS:85133839260

SN - 0043-1648

VL - 504-505

JO - Wear

JF - Wear

M1 - 204433

ER -

Effect of sulfur on the hydrolytic stability and tribological properties of N-containing borate ester

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this