2026-04-17T20:37:22Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/110992025-11-26T01:05:33Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

Ruiz Fernández, Virginia Yate, Luis Langer, Judith Kosta, Ivet Grande, Hans J. Tena Zaera, Ramón 2025-11-25T11:36:48Z 2025-11-25T11:36:48Z 2019-09 0301-679X https://hdl.handle.net/10259/11099 10.1016/j.triboint.2019.05.001 Poly(ethylene glycol) (PEG) chains were covalently grafted onto carbon black (CB) using a PEG-terminated trimethoxysilane, yielding PEGylated CB additives (CB-SiPEG) with different SiPEG contents. Unlike pristine CB, CB-SiPEG was readily dispersed in PEG200 base oil, with CB-SiPEG hydrodynamic particle sizes being considerably smaller than those of pristine CB. At optimal SiPEG content, friction coefficient and specific wear rate in ball-on-disk tribometer tests were reduced by 35% and 67% respectively, with 1% wt. CB-SiPEG compared to PEG200 alone. In contrast, pristine CB, alone or with unbound SiPEG, did not show friction-reducing or antiwear capacity. Disk analysis supports CB-SiPEG surface deposition forming a protective tribofilm. Hydrodynamic particle size and lubricating performance of CB-SiPEG/PEG200 blends were preserved after 6 months, indicating high dispersion stability. Financial support from Diputación Foral de Gipuzkoa (OIL project, ref. 188/2017) is gratefully acknowledged. application/pdf eng Elsevier Tribology International. 2018, V. 137, p. 228-235 https://doi.org/10.1016/j.triboint.2019.05.001 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Carbon black PEGylation Lubricant nanoadditives High dispersibility Lubricantes Lubrication and lubricants PEGylated carbon black as lubricant nanoadditive with enhanced dispersion stability and tribological performance info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Tribology International 137 228 235