RT info:eu-repo/semantics/article
T1 PEGylated carbon black as lubricant nanoadditive with enhanced dispersion stability and tribological performance
A1 Ruiz Fernández, Virginia
A1 Yate, Luis
A1 Langer, Judith
A1 Kosta, Ivet
A1 Grande, Hans J.
A1 Tena Zaera, Ramón
K1 Carbon black
K1 PEGylation
K1 Lubricant nanoadditives
K1 High dispersibility
K1 Lubricantes
K1 Lubrication and lubricants
AB 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.
PB Elsevier
SN 0301-679X
YR 2019
FD 2019-09
LK https://hdl.handle.net/10259/11099
UL https://hdl.handle.net/10259/11099
LA eng
NO Financial support from Diputación Foral de Gipuzkoa (OIL project, ref. 188/2017) is gratefully acknowledged.
DS Repositorio Institucional de la Universidad de Burgos
RD 17-abr-2026