Oil‐Soluble Polymer Brush Grafted Nanoparticles as Effective Lubricant Additives for Friction and Wear Reduction

Wright, Roger A. E.; Wang, Kewei; Qu, Jun; Zhao, Bin

doi:10.1002/ange.201603663

Title: Oil‐Soluble Polymer Brush Grafted Nanoparticles as Effective Lubricant Additives for Friction and Wear Reduction

Abstract

Abstract The development of high performance lubricants has been driven by increasingly growing industrial demands and environmental concerns. Herein, we demonstrate oil‐soluble polymer brush‐grafted inorganic nanoparticles (hairy NPs) as highly effective lubricant additives for friction and wear reduction. A series of oil‐miscible poly(lauryl methacrylate) brush‐grafted silica and titania NPs were synthesized by surface‐initiated atom transfer radical polymerization. These hairy NPs showed exceptional stability in poly(alphaolefin) (PAO) base oil; no change in transparency was observed after being kept at −20, 22, and 100 °C for ≥55 days. High‐contact stress ball‐on‐flat reciprocating sliding tribological tests at 100 °C showed that addition of 1 wt % of hairy NPs into PAO led to significant reductions in coefficient of friction (up to ≈40 %) and wear volume (up to ≈90 %). The excellent lubricating properties of hairy NPs were further elucidated by the characterization of the tribofilm formed on the flat. These hairy NPs represent a new type of lubricating oil additives with high efficiency in friction and wear reduction.

Authors:

Wright, Roger A. E. ^[1]; Wang, Kewei ^[1]; Qu, Jun ^[2];

^[1]

Department of Chemistry University of Tennessee Knoxville TN 37996 USA
Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37830 USA

Publication Date:: Mon Jun 06 00:00:00 EDT 2016

Sponsoring Org.:: USDOE

OSTI Identifier:: 1400979

Grant/Contract Number:: DE EE0006925

Resource Type:: Publisher's Accepted Manuscript

Journal Name:: Angewandte Chemie

Additional Journal Information:: Journal Name: Angewandte Chemie Journal Volume: 128 Journal Issue: 30; Journal ID: ISSN 0044-8249

Publisher:: Wiley Blackwell (John Wiley & Sons)

Country of Publication:: Germany

Language:: English

Citation Formats


                    Wright, Roger A. E., Wang, Kewei, Qu, Jun, and Zhao, Bin. Oil‐Soluble Polymer Brush Grafted Nanoparticles as Effective Lubricant Additives for Friction and Wear Reduction.  Germany: N. p., 2016. 
Web.  doi:10.1002/ange.201603663.

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                    Wright, Roger A. E., Wang, Kewei, Qu, Jun, & Zhao, Bin. Oil‐Soluble Polymer Brush Grafted Nanoparticles as Effective Lubricant Additives for Friction and Wear Reduction.  Germany.  https://doi.org/10.1002/ange.201603663

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                    Wright, Roger A. E., Wang, Kewei, Qu, Jun, and Zhao, Bin. Mon .  
"Oil‐Soluble Polymer Brush Grafted Nanoparticles as Effective Lubricant Additives for Friction and Wear Reduction".  Germany.  https://doi.org/10.1002/ange.201603663.

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@article{osti_1400979,

  title        = {Oil‐Soluble Polymer Brush Grafted Nanoparticles as Effective Lubricant Additives for Friction and Wear Reduction},

  author       = {Wright, Roger A. E. and Wang, Kewei and Qu, Jun and Zhao, Bin},

  abstractNote = {Abstract The development of high performance lubricants has been driven by increasingly growing industrial demands and environmental concerns. Herein, we demonstrate oil‐soluble polymer brush‐grafted inorganic nanoparticles (hairy NPs) as highly effective lubricant additives for friction and wear reduction. A series of oil‐miscible poly(lauryl methacrylate) brush‐grafted silica and titania NPs were synthesized by surface‐initiated atom transfer radical polymerization. These hairy NPs showed exceptional stability in poly(alphaolefin) (PAO) base oil; no change in transparency was observed after being kept at −20, 22, and 100 °C for ≥55 days. High‐contact stress ball‐on‐flat reciprocating sliding tribological tests at 100 °C showed that addition of 1 wt % of hairy NPs into PAO led to significant reductions in coefficient of friction (up to ≈40 %) and wear volume (up to ≈90 %). The excellent lubricating properties of hairy NPs were further elucidated by the characterization of the tribofilm formed on the flat. These hairy NPs represent a new type of lubricating oil additives with high efficiency in friction and wear reduction.},

  doi          = {10.1002/ange.201603663},

  journal      = {Angewandte Chemie},

  number       = 30,

  volume       = 128,

  place        = {Germany},

  year         = {Mon Jun 06 00:00:00 EDT 2016},

  month        = {Mon Jun 06 00:00:00 EDT 2016}

}

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Title: Oil‐Soluble Polymer Brush Grafted Nanoparticles as Effective Lubricant Additives for Friction and Wear Reduction

Abstract

Citation Formats

Hairy Polyelectrolyte Brushes-Grafted Thermosensitive Microgels as Artificial Synovial Fluid for Simultaneous Biomimetic Lubrication and Arthritis Treatment journal, October 2014

Lubrication with Oil-Compatible Polymer Brushes journal, January 2012

Reversible sol–gel transitions of aqueous dispersions of silica nanoparticles grafted with diblock copolymer brushes composed of a thermosensitive inner block and a charged outer block journal, January 2015

Performance and anti-wear mechanism of CaCO3 nanoparticles as a green additive in poly-alpha-olefin journal, July 2009

Hybrid Micellar Hydrogels of a Thermosensitive ABA Triblock Copolymer and Hairy Nanoparticles: Effect of Spatial Location of Hairy Nanoparticles on Gel Properties journal, September 2014

Review of the lubrication of metallic surfaces by zinc dialkyl-dithiophosphates journal, January 2005

Controlled Synthesis of Polymer Brushes by “Living” Free Radical Polymerization Techniques journal, March 1999

Polymer Brushes via Surface-Initiated Controlled Radical Polymerization: Synthesis, Characterization, Properties, and Applications journal, November 2009

Scuffing transition diagrams for heavy duty diesel fuel injector materials in ultra low-sulfur fuel-lubricated environment journal, July 2005

Antiwear Performance and Mechanism of an Oil-Miscible Ionic Liquid as a Lubricant Additive journal, February 2012

Experimental analysis of tribological properties of lubricating oils with nanoparticle additives journal, March 2007

Boundary lubrication under water journal, November 2006

Mixed Polymer Brush-Grafted Particles: A New Class of Environmentally Responsive Nanostructured Materials journal, December 2009

Synthesis of Nanocomposite Organic/Inorganic Hybrid Materials Using Controlled/“Living” Radical Polymerization journal, October 2001

A study of the anti-wear and friction-reducing properties of the lubricant additive, nanometer zinc borate journal, May 1998

Fabrication of Ordered Arrays of Gold Nanoparticles Coated with High-Density Polymer Brushes journal, June 2003

Study of friction reduction by nanocopper additives to motor oil journal, January 2002

Synthesis of Poly(styrene) Monolayers Attached to High Surface Area Silica Gels through Self-Assembled Monolayers of Azo Initiators journal, February 1998

Tribological behavior of nano TiO2 as an additive in base oil journal, April 2013

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Friction and wear properties of a surface-modified TiO2 nanoparticle as an additive in liquid paraffin journal, December 1997

Nanoscale Organic−Inorganic Hybrid Lubricants journal, March 2011

Tribological properties of lubricant additives of Fe, Cu and Co nanoparticles journal, April 2013

Tribology of surface-grafted polymer brushes journal, January 2016

Environmentally Responsive “Hairy” Nanoparticles: Mixed Homopolymer Brushes on Silica Nanoparticles Synthesized by Living Radical Polymerization Techniques journal, May 2005

Preparation of Ni Nanoparticles and Evaluation of Their Tribological Performance as Potential Additives in Oils journal, October 1999

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Tribochemistry and antiwear mechanism of organic–inorganic nanoparticles as lubricant additives journal, April 2006

Bioinspired Bottle-Brush Polymer Exhibits Low Friction and Amontons-like Behavior journal, April 2014

Synergistic Effects Between Phosphonium-Alkylphosphate Ionic Liquids and Zinc Dialkyldithiophosphate (ZDDP) as Lubricant Additives journal, July 2015

The tribological behaviour of ZnO nanoparticles as an additive to PAO6 journal, August 2006

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Slow Release of Fullerene-like WS 2 Nanoparticles from Fe−Ni Graphite Matrix: A Self-Lubricating Nanocomposite journal, March 2001

Ionic Liquids Composed of Phosphonium Cations and Organophosphate, Carboxylate, and Sulfonate Anions as Lubricant Antiwear Additives journal, October 2014

Hairy Polyelectrolyte Brushes-Grafted Thermosensitive Microgels as Artificial Synovial Fluid for Simultaneous Biomimetic Lubrication and Arthritis Treatment
journal, October 2014

Lubrication with Oil-Compatible Polymer Brushes
journal, January 2012

Reversible sol–gel transitions of aqueous dispersions of silica nanoparticles grafted with diblock copolymer brushes composed of a thermosensitive inner block and a charged outer block
journal, January 2015

Performance and anti-wear mechanism of CaCO3 nanoparticles as a green additive in poly-alpha-olefin
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Hybrid Micellar Hydrogels of a Thermosensitive ABA Triblock Copolymer and Hairy Nanoparticles: Effect of Spatial Location of Hairy Nanoparticles on Gel Properties
journal, September 2014

Review of the lubrication of metallic surfaces by zinc dialkyl-dithiophosphates
journal, January 2005

Controlled Synthesis of Polymer Brushes by “Living” Free Radical Polymerization Techniques
journal, March 1999

Polymer Brushes via Surface-Initiated Controlled Radical Polymerization: Synthesis, Characterization, Properties, and Applications
journal, November 2009

Scuffing transition diagrams for heavy duty diesel fuel injector materials in ultra low-sulfur fuel-lubricated environment
journal, July 2005

Antiwear Performance and Mechanism of an Oil-Miscible Ionic Liquid as a Lubricant Additive
journal, February 2012

Experimental analysis of tribological properties of lubricating oils with nanoparticle additives
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Boundary lubrication under water
journal, November 2006

Mixed Polymer Brush-Grafted Particles: A New Class of Environmentally Responsive Nanostructured Materials
journal, December 2009

Synthesis of Nanocomposite Organic/Inorganic Hybrid Materials Using Controlled/“Living” Radical Polymerization
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A study of the anti-wear and friction-reducing properties of the lubricant additive, nanometer zinc borate
journal, May 1998

Fabrication of Ordered Arrays of Gold Nanoparticles Coated with High-Density Polymer Brushes
journal, June 2003

Study of friction reduction by nanocopper additives to motor oil
journal, January 2002

Synthesis of Poly(styrene) Monolayers Attached to High Surface Area Silica Gels through Self-Assembled Monolayers of Azo Initiators
journal, February 1998

Tribological behavior of nano TiO2 as an additive in base oil
journal, April 2013

The History and Mechanisms of ZDDP
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Friction and wear properties of a surface-modified TiO2 nanoparticle as an additive in liquid paraffin
journal, December 1997

Nanoscale Organic−Inorganic Hybrid Lubricants
journal, March 2011

Tribological properties of lubricant additives of Fe, Cu and Co nanoparticles
journal, April 2013

Tribology of surface-grafted polymer brushes
journal, January 2016

Environmentally Responsive “Hairy” Nanoparticles: Mixed Homopolymer Brushes on Silica Nanoparticles Synthesized by Living Radical Polymerization Techniques
journal, May 2005

Preparation of Ni Nanoparticles and Evaluation of Their Tribological Performance as Potential Additives in Oils
journal, October 1999

Detecting the onset of localized scuffing in a pin-on-twin fuel-lubricated test for heavy-duty diesel fuel injectors
journal, February 2005

Tribochemistry and antiwear mechanism of organic–inorganic nanoparticles as lubricant additives
journal, April 2006

Bioinspired Bottle-Brush Polymer Exhibits Low Friction and Amontons-like Behavior
journal, April 2014

Synergistic Effects Between Phosphonium-Alkylphosphate Ionic Liquids and Zinc Dialkyldithiophosphate (ZDDP) as Lubricant Additives
journal, July 2015

The tribological behaviour of ZnO nanoparticles as an additive to PAO6
journal, August 2006

Lubrication Mechanism of Concentrated Polymer Brushes in Solvents: Effect of Solvent Quality and Thereby Swelling State
journal, June 2011

Nanostructure and Composition of Tribo-Boundary Films Formed in Ionic Liquid Lubrication
journal, May 2011

Characterization and antiwear ability of non-coated ZnS nanoparticles and DDP-coated ZnS nanoparticles
journal, January 2001

Slow Release of Fullerene-like WS ₂ Nanoparticles from Fe−Ni Graphite Matrix: A Self-Lubricating Nanocomposite
journal, March 2001

Ionic Liquids Composed of Phosphonium Cations and Organophosphate, Carboxylate, and Sulfonate Anions as Lubricant Antiwear Additives
journal, October 2014