Synthesis of Oil-Soluble Polymer-Grafted Carbon Dots with Outstanding Colloidal Stability and Tribological Properties in Polyalphaolefin DOI

Jie Peng,

Weiwei Tang, Zhiqiang Jiang

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 40(46), P. 24653 - 24661

Published: Nov. 4, 2024

Herein, a series of polylauryl methacrylate-grafted CDs (CDs-PLMA-m, m denotes the reaction time in hours) with core-shell structure were synthesized via surface-initiated atom-transfer radical polymerization (SI-ATRP). Due to good solubility PLMA hydrocarbons, all CDs-PLMA-m can be facilely dispersed polyalphaolefin (PAO) form pellucid colloidal dispersions. The reciprocating ball-on-plate sliding friction tests proved that addition 3.0 wt % CDs-PLMA-1 markedly lessened wear and PAO by 53.0 40.0%, respectively. tribological performances (3.0 %)/PAO dispersion did not attenuate sharply when duration extended from 20 200 min or applied load increased 100 N, revealing long lifetime desirable load-carrying effect CDs-PLMA-1. Based on tests, antifriction behavior was related synergies between molecular lubrication PLMA-1 brushes nanolubrication CDs. Furthermore, analyses disclosed deposition tribofilm composed lot spot iron oxides, which provided oxidation resistance an antiwear function. This study established reliable route synthesis oil-soluble polymer-grafted CDs, enabling high-efficiency PAO.

Language: Английский

Functionalization of Hydrophilic and Amphiphilic Carbon Dots with Polyethylene Glycol for Electroluminescent Devices DOI Creative Commons
Mikhail D. Miruschenko, Kseniia D. Kosolapova, Ivan A. Aleinik

et al.

Small Structures, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 17, 2025

Carbon dots (CDs) are fluorescent carbon nanomaterials that considered for applications in optoelectronics, sensorics, and biofields due to their low‐cost robust synthesis, versatile optical properties. Herein, it is demonstrated how chemical functionalization of hydrophilic or amphiphilic CDs with polyethylene glycol influences energy level structure hence the emission Functionalization results an increase quantum yield: from 30% 75% 20% 25% CDs. The estimated absolute values levels, including highest occupied molecular orbital lowest unoccupied energies, dependent on composition size Moreover, glycol‐functionalized CD can form good quality films based composite polyvinylcarbazole (PVK), together intense crucial light‐emitting diode (LED) fabrication. By studying spectral properties fabricated CD‐LEDs, shown electroluminescence (EL) originates mixed levels PVK composite, resulting shifting EL maximum blue green during several seconds LED operation. optimized CD‐LEDs show brightness up 2600 cd m −2 .

Language: Английский

Citations

1
Fabrication of N/P-Codoped Carbon dots with Anti-bacterial Activity for Enhanced Aqueous Lubrication Performance DOI

Guangkai Jin,

Yuhong Cui,

Kaige Yan

et al.

Carbon, Journal Year: 2024, Volume and Issue: 230, P. 119578 - 119578

Published: Aug. 28, 2024

Language: Английский

Citations

7
Fabrication of ionic liquid-functionalized carbon dots as lubricant additive for friction and wear reduction DOI

Shenghua Xue,

Xiaozhi Zhang, William Yi Wang

et al.

Tribology International, Journal Year: 2024, Volume and Issue: 201, P. 110227 - 110227

Published: Sept. 10, 2024

Language: Английский

Citations

7
Liquid-Like Carbon Dots as Lubricating Grease Additives DOI
Haocheng Wang, Yi Li,

Qinglun Che

et al.

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Liquid-like nanomaterials are emerging as unique nanolubricating materials due to their combined advantages of fluidity and nanoscale size. However, development application have been hindered by relatively complex synthesis processes. Herein, a one-step method for synthesizing liquid-like carbon dots (LCDs) was developed introducing ammonium salts into citric acid–based system. Compared solid (CDs) synthesized with acid, LCDs exhibit characteristics, which were further explored through molecular simulations. When used additives in lubricating grease, demonstrate excellent tribological performance, including friction reduction, antiwear properties, improved load-carrying capacity. This study not only introduces simple cost-effective strategy producing LCDs, advancing the CDs but also expands understanding grease.

Language: Английский

Citations

0
Review: recent advances of carbon dots in nano-lubrication DOI
Jing Zhang, Hongyu Gao,

Haijie He

et al.

Journal of Materials Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 22, 2025

Language: Английский

Citations

0
A Spectroscopic Investigation into the Stability of Carbon Dots Derived from Polyethylene Glycol DOI

K. R. Athulya,

Anu V. Chandran,

Tirupati Rao Bantu

et al.

Journal of Fluorescence, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Language: Английский

Citations

0
Carbon nanomaterials as additives in lubricating oils for tribological applications: A review DOI
Zheyin Yu,

Meng Zhou,

Rende Liu

et al.

Diamond and Related Materials, Journal Year: 2025, Volume and Issue: 156, P. 112384 - 112384

Published: April 29, 2025

Language: Английский

Citations

0
Progress on Carbon Dots with Intrinsic Bioactivities for Multimodal Theranostics DOI Open Access
Hao Zhang, Hao Liu, Xiaohui Liu

et al.

Advanced Healthcare Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 23, 2024

Abstract Carbon dots (CDs) with intrinsic bioactivities are candidates for bioimaging and disease therapy due to their diverse bioactivities, high biocompatibility, multiple functionalities in multimodal theranostics. It is a multidisciplinary research hotspot that includes biology, physics, materials science, chemistry. This progress report discusses the CDs applications The relationship between synthesis structure of summarized analyzed from material chemical perspective. including anti‐tumor, antibacterial, anti‐inflammatory etc. discussed biological points view. Subsequently, optical electronic properties can be applied biomedical field physical Based on functional review CDs, reviewed, diagnosis treatment, activity, Unlike previous reviews, this combines disciplines gain more comprehensive understanding mechanisms, functions, bioactivities.

Language: Английский

Citations

3
Synthesis of Oil-Soluble Polymer-Grafted Carbon Dots with Outstanding Colloidal Stability and Tribological Properties in Polyalphaolefin DOI

Jie Peng,

Weiwei Tang, Zhiqiang Jiang

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 40(46), P. 24653 - 24661

Published: Nov. 4, 2024

Herein, a series of polylauryl methacrylate-grafted CDs (CDs-PLMA-m, m denotes the reaction time in hours) with core-shell structure were synthesized via surface-initiated atom-transfer radical polymerization (SI-ATRP). Due to good solubility PLMA hydrocarbons, all CDs-PLMA-m can be facilely dispersed polyalphaolefin (PAO) form pellucid colloidal dispersions. The reciprocating ball-on-plate sliding friction tests proved that addition 3.0 wt % CDs-PLMA-1 markedly lessened wear and PAO by 53.0 40.0%, respectively. tribological performances (3.0 %)/PAO dispersion did not attenuate sharply when duration extended from 20 200 min or applied load increased 100 N, revealing long lifetime desirable load-carrying effect CDs-PLMA-1. Based on tests, antifriction behavior was related synergies between molecular lubrication PLMA-1 brushes nanolubrication CDs. Furthermore, analyses disclosed deposition tribofilm composed lot spot iron oxides, which provided oxidation resistance an antiwear function. This study established reliable route synthesis oil-soluble polymer-grafted CDs, enabling high-efficiency PAO.

Language: Английский

Citations

2