TY - JOUR
T1 - Fabrication of Dialkyl Dithiophosphate-Functionalized Carbon Aerogel Microspheres for Enhanced Lubrication Performance
AU - Hou, Jingwen
AU - Jin, Guangkai
AU - Wang, Yi
AU - Wang, Yixin
AU - Liu, Shujuan
AU - Yang, Mingming
AU - Ye, Qian
AU - Zhou, Feng
N1 - Publisher Copyright:
© 2025 American Chemical Society.
PY - 2025/3/25
Y1 - 2025/3/25
N2 - Herein, functionalized carbon aerogel microspheres (CAMs) were successfully prepared by the pyrolysis of resorcinol-formaldehyde (RF) microspheres followed by surface modification. First, RF microspheres were carbonized to obtain CAMs. Afterward, the polyphenolic compound of epigallocatechin gallate (EGCG) was reacted with melamine to form a poly(EGCG) layer onto the CAM surface, followed by bonding the antiwear molecule dialkyl dithiophosphate (DDP) by the Michael addition, resulting in DDP-functionalized CAMs (DDP-CAMs). The grafting antiwear molecule DDP improved the lipophilicity of the CAMs, enabling stable dispersion in the base oil 500SN for over 10 days while also enhancing their antifriction and antiwear properties. The addition of 1.0 wt % DDP-CAMs to 500SN resulted in a 34.7% reduction in coefficient of friction and a 47.5% decrease in wear volume. The enhanced lubrication performance can be attributed to a synergistic effect. On one hand, a protective film was generated through tribo-chemical reactions. At the same time, the DDP-CAMs present at the contact interface exhibited a nanoscale rolling and self-repairing effect.
AB - Herein, functionalized carbon aerogel microspheres (CAMs) were successfully prepared by the pyrolysis of resorcinol-formaldehyde (RF) microspheres followed by surface modification. First, RF microspheres were carbonized to obtain CAMs. Afterward, the polyphenolic compound of epigallocatechin gallate (EGCG) was reacted with melamine to form a poly(EGCG) layer onto the CAM surface, followed by bonding the antiwear molecule dialkyl dithiophosphate (DDP) by the Michael addition, resulting in DDP-functionalized CAMs (DDP-CAMs). The grafting antiwear molecule DDP improved the lipophilicity of the CAMs, enabling stable dispersion in the base oil 500SN for over 10 days while also enhancing their antifriction and antiwear properties. The addition of 1.0 wt % DDP-CAMs to 500SN resulted in a 34.7% reduction in coefficient of friction and a 47.5% decrease in wear volume. The enhanced lubrication performance can be attributed to a synergistic effect. On one hand, a protective film was generated through tribo-chemical reactions. At the same time, the DDP-CAMs present at the contact interface exhibited a nanoscale rolling and self-repairing effect.
UR - http://www.scopus.com/inward/record.url?scp=105001209551&partnerID=8YFLogxK
U2 - 10.1021/acs.langmuir.5c00455
DO - 10.1021/acs.langmuir.5c00455
M3 - 文章
AN - SCOPUS:105001209551
SN - 0743-7463
VL - 41
SP - 7856
EP - 7864
JO - Langmuir
JF - Langmuir
IS - 11
ER -