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Influence of molecular structure on lubrication of aqueous triblock copolymer lubricants between rutile surfaces: An MD approach

Journal Article


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Abstract


  • The influence of molecular structure on adsorption and lubrication of aqueous triblock copolymer on TiO2surfaces has been investigated using a realistic MD model. Reference data obtained from DFT calculations have been employed to develop an interaction potential between the copolymer and TiO2surface. The results show that R Pluronics form an anchor–buoy–anchor structure absorbed on TiO2surface and L Pluronic for buoy–anchor–buoy structure. The shear of tribo-system influences slightly on the orientation of copolymers and non-slip behavior has been observed at solid-fluid interfaces due to the strong adhesion strength of copolymer on rutile surface. The shear viscosity increases with copolymer concentration and molecular chain length. L Pluronic has a lower shear stress than the R ones.

Publication Date


  • 2019

Citation


  • Ta, T. D., Tieu, A. K., Zhu, H., Wan, S., Phan, H. T. & Hao, J. (2019). Influence of molecular structure on lubrication of aqueous triblock copolymer lubricants between rutile surfaces: An MD approach. Tribology International, 130 170-183.

Scopus Eid


  • 2-s2.0-85054065086

Ro Full-text Url


  • https://ro.uow.edu.au/context/eispapers1/article/2896/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1894

Number Of Pages


  • 13

Start Page


  • 170

End Page


  • 183

Volume


  • 130

Place Of Publication


  • United Kingdom

Abstract


  • The influence of molecular structure on adsorption and lubrication of aqueous triblock copolymer on TiO2surfaces has been investigated using a realistic MD model. Reference data obtained from DFT calculations have been employed to develop an interaction potential between the copolymer and TiO2surface. The results show that R Pluronics form an anchor–buoy–anchor structure absorbed on TiO2surface and L Pluronic for buoy–anchor–buoy structure. The shear of tribo-system influences slightly on the orientation of copolymers and non-slip behavior has been observed at solid-fluid interfaces due to the strong adhesion strength of copolymer on rutile surface. The shear viscosity increases with copolymer concentration and molecular chain length. L Pluronic has a lower shear stress than the R ones.

Publication Date


  • 2019

Citation


  • Ta, T. D., Tieu, A. K., Zhu, H., Wan, S., Phan, H. T. & Hao, J. (2019). Influence of molecular structure on lubrication of aqueous triblock copolymer lubricants between rutile surfaces: An MD approach. Tribology International, 130 170-183.

Scopus Eid


  • 2-s2.0-85054065086

Ro Full-text Url


  • https://ro.uow.edu.au/context/eispapers1/article/2896/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1894

Number Of Pages


  • 13

Start Page


  • 170

End Page


  • 183

Volume


  • 130

Place Of Publication


  • United Kingdom