Fabrication of Dialkyl Dithiophosphate-Functionalized Carbon Aerogel Microspheres for Enhanced Lubrication Performance

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-03-14 DOI:10.1021/acs.langmuir.5c00455

Jingwen Hou, Guangkai Jin, Yi Wang, Yixin Wang, Shujuan Liu, Mingming Yang, Qian Ye, Feng Zhou

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Abstract

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.

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增强润滑性能的二烷基二硫代磷酸酯功能化碳气凝胶微球的制备

本文通过对间苯二酚-甲醛（RF）微球的热解和表面改性制备了功能化碳气凝胶微球（CAMs）。首先，对射频微球进行碳化制备cam。随后，表没食子儿茶素没食子酸酯（EGCG）多酚化合物与三聚氰胺反应，在CAM表面形成聚（EGCG）层，然后通过Michael加成与抗磨分子二烷基二硫代磷酸（DDP）结合，得到DDP功能化CAM （DDP-CAMs）。接枝抗磨分子DDP提高了CAMs的亲脂性，使CAMs在基础油500SN中稳定分散超过10天，同时也提高了CAMs的减摩抗磨性能。在500SN中加入1.0 wt %的DDP-CAMs，摩擦系数降低34.7%，磨损量减少47.5%。增强的润滑性能可归因于协同效应。一方面，通过摩擦化学反应生成保护膜。同时，存在于接触界面的ddp - cam表现出纳米级的滚动和自修复效应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).