Carbon nanotubes as fast-thickening agents in polyalphaolefin greases: Partial crystallinity and intertube joints toward multifunctionality

被引：0

作者：

Boncel, Slawomir ^{[1
,2
]}

Kaluzny, Jaroslaw ^{[3
]}

Rozanski, Jacek ^{[4
]}

Strzemiecka, Beata ^{[4
]}

Runka, Tomasz ^{[5
]}

Wojciechowski, Lukasz ^{[6
]}

Kujawa, Joanna ^{[7
]}

Korczeniewski, Emil ^{[8
]}

Terzyk, Artur P. ^{[8
]}

Blaszkiewicz, Paulina ^{[9
]}

Marek, Adam A. ^{[10
]}

Kolanowska, Anna ^{[1
,2
]}

Jedrysiak, Rafal G. ^{[1
,2
]}

Ruczka, Szymon ^{[1
,2
]}

Dzido, Grzegorz ^{[11
]}

Gizewski, Tomasz ^{[12
]}

机构：

[1] Silesian Tech Univ, Dept Organ Chem Bioorgan Chem & Biotechnol, NanoCarbon Grp, Boleslawa Krzywoustego St 4, PL-44100 Gliwice, Poland

[2] Silesian Tech Univ, Ctr Organ & Nanohybrid Elect CONE, Stanislawa Konarskiego St 22B, PL-44100 Gliwice, Poland

[3] Poznan Univ Tech, Fac Civil & Transport Engn, Inst Combust Engines & Powertrains, Piotrowo St 3, PL-60965 Poznan, Poland

[4] Poznan Univ Tech, Inst Chem Technol & Engn, Fac Chem Technol, Berdychowo St 4, PL-60965 Poznan, Poland

[5] Poznan Univ Tech, Inst Mat Res & Quantum Engn, Fac Mat Engn & Tech Phys, Piotrowo St 3, PL-60965 Poznan, Poland

[6] Poznan Univ Tech, Inst Machines & Motor Vehicles, Fac Civil & Transport Engn, Piotrowo St 3, PL-60965 Poznan, Poland

[7] Nicolaus Copernicus Univ Torun, Fac Chem, Membranes & Membrane Tech Res Grp, Gagarin St 7, PL-87100 Torun, Poland

[8] Nicolaus Copernicus Univ Torun, Fac Chem, Physicochemistry Carbon Mat Res Grp, Dept Chem Mat, Gagarin St 7, PL-87100 Torun, Poland

[9] Poznan Univ Tech, Inst Phys, Fac Mat Engn & Tech Phys, Piotrowo St 3, PL-60965 Poznan, Poland

[10] Silesian Tech Univ, Dept Chem Organ Technol & Petrochem, Boleslawa Krzywoustego St 4, PL-44100 Gliwice, Poland

[11] Silesian Tech Univ, Dept Chem Engn & Proc Design, Marcina Strzody St 7, PL-44100 Gliwice, Poland

[12] Lublin Univ Technol, Fac Elect Engn & Comp Sci, Nadbystrzycka 38A, Lublin, Poland

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2023年 / 391卷

关键词：

Carbon nanotubes; Grease; Interface; Viscosity; Electrical conductivity; Thermal conductivity; THERMAL TRANSPORT; PERFORMANCE; TRIBOLOGY; GRAPHENE;

D O I：

10.1016/j.molliq.2023.123215

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Scalable and economic manufacturing of carbon nanotube (CNT) greases addresses the current challenges of nanofluids. The key problems remain the complex and non-obvious nature of nanotube-base fluid interactions with the diversity of nanotube morphological variants as the main aspect. Here, we prove that successful formation of stable and multifunctional CNT-polyalphaolefin (PAO) greases is possible only by employing two types of multi-wall CNTs (MWCNTs) as the thickening as well as thermo- and electro-active agents, i.e., (1) thin, entangled, less crystalline nanotubes and (2) thick nanotubes connected via few-mismatched-layer graphenoid joints. Using mechanical spectroscopy, SEM, TEM, Raman spectroscopy, inverse gas chromatography (IGC), and Hansen solubility parameters, we analyze the mechanisms governing fast-thickening behavior and CNT-PAO affinities, revealing a reversible formation of a 3D CNT-network which mimics a mesh of the conventional lithium soaps. Finally, we reveal the multifunctionality of the CNT-PAO greases, expressed in as high as 58%- and 700%-enhancements of thermal and alternating current conductivity, respectively, compared to PAO base fluid.

引用

页数：10