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Hydrogen Bonding-Assisted Thermal, Electrical, Anti-Friction, and Anti-Corrosion Properties of Nano Greases/Composites With 1D/2D Hybrid Nano Additives.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Hydrogen Bonding-Assisted Thermal, Electrical, Anti-Friction, and Anti-Corrosion Properties of Nano Greases/Composites With 1D/2D Hybrid Nano Additives./
Author:	Lou, Ding.
Description:	1 online resource (231 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-06, Section: B.
Contained By:	Dissertations Abstracts International85-06B.
Subject:	Nanoscience. -
Online resource:	click for full text (PQDT)
ISBN:	9798381091687

Hydrogen Bonding-Assisted Thermal, Electrical, Anti-Friction, and Anti-Corrosion Properties of Nano Greases/Composites With 1D/2D Hybrid Nano Additives.
Lou, Ding.

Hydrogen Bonding-Assisted Thermal, Electrical, Anti-Friction, and Anti-Corrosion Properties of Nano Greases/Composites With 1D/2D Hybrid Nano Additives. - 1 online resource (231 pages)

Source: Dissertations Abstracts International, Volume: 85-06, Section: B.

Thesis (Ph.D.)--South Dakota School of Mines and Technology, 2023.

Includes bibliographical references

The advanced physical properties of nano greases/composites are highly dependent on the dispersion and the network formation of the nano additives. This dissertation studies the enhanced thermal, electrical, tribological, and anti-corrosion properties of nano greases/composites through the incorporation of one-dimensional (1D) carbon nanotubes/nanofibers (CNTs/CNFs) and two-dimensional (2D) hexagonal boron nitride (hBN) and Ti3C2Tx MXene. Two main factors that influence the aforementioned physical properties were investigated: the effect of hydrogen bonding and the synergistic effect of 1D/2D hybrid nano additives. Both factors contribute to the enhanced dispersion of the nano additives as well as the formation of a well-connected network structure.The first project discusses the thermal and tribological properties of nano greases through the addition of 1D CNTs/CNFs and 2D hBN. Significant thermal conductivity increments over the base oil were obtained. The tribological study revealed that the addition of hBN and CNFs hybrid additives into the base Polyalphaolefin oil showed a much lower and more stable friction coefficient of the tribo-pairs, demonstrating the synergistic effect of the two nano additives on the anti-friction and anti-wear performance of greases.This dissertation also investigates the significantly enhanced thermal and electrical conductivity of polymer nanocomposites by the addition of functionalized CNTs. This project demonstrates an approach to significantly increase the thermal and electrical conductivity of polymer nanocomposites through the concept of introducing hydrogen bonding into the polymer composite solutions. Hydrogen bonding is introduced by using functionalized CNTs and additional solvents such as ethanol and water. The addition of 25% solvents could lead up to a two-order-of-magnitude increase in the electrical conductivity of polymer nanocomposites. These highly thermally and electrically conductive polymer nanocomposites can be applied by the conventional high-pressure low-volume spray method, giving this research a high likelihood of producing an affordable solution for many commercial applications.The last part of this dissertation covers the investigation of the anti-corrosion properties of waterborne polyurethane (WPU)-based nanocomposites incorporated with hybrid nano additives of 2D Ti3C2Tx MXene and 1D functionalized CNTs. The homogeneous dispersion of Ti3C2Tx MXene and functionalized CNTs was achieved by the formation of hydrogen bonding between the surface functionalization on MXene and CNTs. The improved corrosion protection of polyurethane nanocomposites was attributed to the lengthened penetration of corrosive molecules due to the improved dispersion of MXene sheets. Electrochemical results revealed that the WPU nanocomposites with MXene/CNTs hybrid additives showed a 95% increase in corrosion resistance and a 72% decrease in corrosion rate compared to the WPU nanocomposites with only MXene.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798381091687Subjects--Topical Terms:

632473
Nanoscience.
Subjects--Index Terms:

Hexagonal boron nitrideIndex Terms--Genre/Form:

554714
Electronic books.

Hydrogen Bonding-Assisted Thermal, Electrical, Anti-Friction, and Anti-Corrosion Properties of Nano Greases/Composites With 1D/2D Hybrid Nano Additives.
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520 $a The advanced physical properties of nano greases/composites are highly dependent on the dispersion and the network formation of the nano additives. This dissertation studies the enhanced thermal, electrical, tribological, and anti-corrosion properties of nano greases/composites through the incorporation of one-dimensional (1D) carbon nanotubes/nanofibers (CNTs/CNFs) and two-dimensional (2D) hexagonal boron nitride (hBN) and Ti3C2Tx MXene. Two main factors that influence the aforementioned physical properties were investigated: the effect of hydrogen bonding and the synergistic effect of 1D/2D hybrid nano additives. Both factors contribute to the enhanced dispersion of the nano additives as well as the formation of a well-connected network structure.The first project discusses the thermal and tribological properties of nano greases through the addition of 1D CNTs/CNFs and 2D hBN. Significant thermal conductivity increments over the base oil were obtained. The tribological study revealed that the addition of hBN and CNFs hybrid additives into the base Polyalphaolefin oil showed a much lower and more stable friction coefficient of the tribo-pairs, demonstrating the synergistic effect of the two nano additives on the anti-friction and anti-wear performance of greases.This dissertation also investigates the significantly enhanced thermal and electrical conductivity of polymer nanocomposites by the addition of functionalized CNTs. This project demonstrates an approach to significantly increase the thermal and electrical conductivity of polymer nanocomposites through the concept of introducing hydrogen bonding into the polymer composite solutions. Hydrogen bonding is introduced by using functionalized CNTs and additional solvents such as ethanol and water. The addition of 25% solvents could lead up to a two-order-of-magnitude increase in the electrical conductivity of polymer nanocomposites. These highly thermally and electrically conductive polymer nanocomposites can be applied by the conventional high-pressure low-volume spray method, giving this research a high likelihood of producing an affordable solution for many commercial applications.The last part of this dissertation covers the investigation of the anti-corrosion properties of waterborne polyurethane (WPU)-based nanocomposites incorporated with hybrid nano additives of 2D Ti3C2Tx MXene and 1D functionalized CNTs. The homogeneous dispersion of Ti3C2Tx MXene and functionalized CNTs was achieved by the formation of hydrogen bonding between the surface functionalization on MXene and CNTs. The improved corrosion protection of polyurethane nanocomposites was attributed to the lengthened penetration of corrosive molecules due to the improved dispersion of MXene sheets. Electrochemical results revealed that the WPU nanocomposites with MXene/CNTs hybrid additives showed a 95% increase in corrosion resistance and a 72% decrease in corrosion rate compared to the WPU nanocomposites with only MXene.
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