Functionalized coal tar pitch-based carbon dots as water-based lubricant additives and its tribological properties

doi:10.16085/j.issn.1000-6613.2024-1664

Chemical Industry and Engineering Progress ›› 2025, Vol. 44 ›› Issue (11): 6563-6573.DOI: 10.16085/j.issn.1000-6613.2024-1664

• Materials science and technology • Previous Articles

Functionalized coal tar pitch-based carbon dots as water-based lubricant additives and its tribological properties

LI Xiuchun¹(), YANG Jinwei¹, LU Yueqiang¹, HUO Muyi¹, ZENG Huihui²(), ZHAO Conghui², XING Baolin², ZHAO Bingjian³, QU Xiaoxiao², KANG Weiwei², ZHANG Chuanxiang⁴^,⁵()

^1.China Coal Huali Xinjiang Carbon Technology Co. , Ltd. , Hami 839200, Xinjiang, China
^2.Henan Key Laboratory of Coal Green Conversion, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan, China
^3.Hami Vocational and Technical College, Hami 839000, Xinjiang, China
^4.State Collaborative Innovation Center of Coal Work Safety and Clean-Efficiency Utilization, Jiaozuo 454003, Henan, China
^5.Ordos Institute of Coal Clean Development and Utilization, Henan Polytechnic University, Ordos 017010, Inner Mongolia, China

Received:2024-10-15 Revised:2025-01-20 Online:2025-12-08 Published:2025-11-25
Contact: ZENG Huihui, ZHANG Chuanxiang

功能化煤沥青基碳点作为水基润滑添加剂及其摩擦学特性

李秀春¹(), 杨晋伟¹, 路悦强¹, 霍慕逸¹, 曾会会²(), 赵聪慧², 邢宝林², 赵兵建³, 屈笑笑², 康伟伟², 张传祥⁴^,⁵()

^1.中煤华利新疆炭素科技有限公司，新疆哈密 839200
^2.河南省煤炭绿色转化重点实验室，河南理工大学化学化工学院，河南焦作 454003
^3.哈密职业技术学院，新疆哈密 839000
^4.煤炭安全生产与清洁高效利用省部共建协同创新中心，河南焦作 454003
^5.河南理工大学鄂尔多斯煤炭清洁开发利用研究院，内蒙古鄂尔多斯 017010

通讯作者: 曾会会,张传祥
作者简介:李秀春（1965—），男，本科，研究方向为煤炭资源开发利用。E-mail：892640933@qq.com。
基金资助:
国家自然科学基金(52304284);国家自然科学基金(52074109);呼包鄂国家自主创新示范区建设科技支撑项目(2023XM10);中煤华利新疆炭素科技有限公司委托项目(TSFWCG2023-11-002)

Abstract

Abstract:

Water-based lubricants play an important role in the molding process of metal workpieces due to their non-toxicity, good cooling properties, easy cleaning and high chemical stability, while additives as the essence of the lubricant are the key to improve its tribological properties. In this paper, functionalized coal tar pitch-based carbon dots (AEO9@CDs) were synthesized by a simple hydrothermal method using coal tar pitch as raw material and aliphatic alcohol polyoxyethylene ether as surface modifier. The results showed that AEO9@CDs had a spherical-like structure with a carbonaceous core supplemented by abundant oxygen/nitrogen-containing functional groups modified on the surface, and it had the average particle size of about 2.60nm and excellent water solubility and dispersion stability. The AEO9@CDs as a water-based lubricant additive indicated excellent tribological performance in four-ball friction experiments. The concentration of additives and the load strength were important factors affecting the lubrication performance of AEO9@CDs. At a mass fraction of 1.00% and a load of 50N, the average friction coefficient and wear diameter after adding AEO9@CDs lubricant were reduced by 48.4% and 25.8% compared with the water-based liquid, showing good friction reduction and anti-wear properties. The efficient lubrication performance of AEO9@CDs as lubricant additives was closely related to its nano-sized spherical-like structure and the rich oxygen/nitrogen-containing functional groups on the surface, which could promote the synergistic effect of multiple lubrication mechanisms such as rolling bearing, polishing, filling and repairing, as well as interfacial protective film on friction surfaces.

Key words: coal tar pitch, carbon dots, synthesis, surface, water-based lubricant additives, film, tribological properties

摘要：

水基润滑剂因无毒、冷却性好、易清洗且化学稳定性高等特点在金属工件成型过程中发挥重要作用，而添加剂作为润滑剂则是改善其摩擦学性能的关键。本文以煤沥青（CTP）为原料，脂肪醇聚氧乙烯醚（AEO9）为表面修饰剂，采用简易水热法合成功能化煤沥青基碳点（AEO9@CDs）。研究结果表明，AEO9@CDs具有以碳质核心为主体，丰富的含氧/氮官能团修饰于表面的类球形结构，平均粒径约为2.60nm，且具有极好的水溶性和分散稳定性。AEO9@CDs作为水基润滑添加剂在四球摩擦实验中表现出优异的摩擦学性能。添加剂的浓度以及载荷强度是影响AEO9@CDs润滑性能的重要因素。当质量分数为1.00%、载荷为50N时，与水基础液相比，添加AEO9@CDs的润滑剂润滑后其平均摩擦系数和平均磨斑直径减小48.4%和25.8%，表现出良好的减摩抗磨性能。AEO9@CDs作为润滑添加剂的高效润滑性能，与其纳米尺寸的类球形结构以及表面富含的含氧/氮官能团能够促进其在摩擦表面发挥滚动轴承、抛光、填充修复以及界面保护等多重润滑机制协同作用密切相关。

关键词: 煤沥青, 碳点, 合成, 表面, 水基润滑添加剂, 膜, 摩擦学性能

CLC Number:

TD98

LI Xiuchun, YANG Jinwei, LU Yueqiang, HUO Muyi, ZENG Huihui, ZHAO Conghui, XING Baolin, ZHAO Bingjian, QU Xiaoxiao, KANG Weiwei, ZHANG Chuanxiang. Functionalized coal tar pitch-based carbon dots as water-based lubricant additives and its tribological properties[J]. Chemical Industry and Engineering Progress, 2025, 44(11): 6563-6573.

李秀春, 杨晋伟, 路悦强, 霍慕逸, 曾会会, 赵聪慧, 邢宝林, 赵兵建, 屈笑笑, 康伟伟, 张传祥. 功能化煤沥青基碳点作为水基润滑添加剂及其摩擦学特性[J]. 化工进展, 2025, 44(11): 6563-6573.

Figures/Tables 12

References 30

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样品	工业分析/%					元素分析/%
样品	M_ad	A_d	V_daf	FC_daf	C_daf		H_daf	O^*_daf	N_daf
CTP	0.37	0.21	64.23	35.77	92.89		4.01	2.51	0.59

样品	工业分析/%					元素分析/%
样品	M_ad	A_d	V_daf	FC_daf	C_daf		H_daf	O^*_daf	N_daf
CTP	0.37	0.21	64.23	35.77	92.89		4.01	2.51	0.59

Functionalized coal tar pitch-based carbon dots as water-based lubricant additives and its tribological properties

功能化煤沥青基碳点作为水基润滑添加剂及其摩擦学特性

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