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Influence of inorganic coating over diamond particles on interaction force and dispersability in electroless solution

Influence of inorganic coating over diamond particles on interaction force and dispersability in electroless solution
Influence of inorganic coating over diamond particles on interaction force and dispersability in electroless solution

The inorganic coating of Al2O3 was introduced on nanoparticles to weaken their tendency of agglomeration in electroless plating bath. The influence of the coating on interaction energy and interaction forces between the coated particles was evaluated in this study. The Al2O3-coated diamond particles were prepared by the heterogeneous nucleation process. The attractive interaction and repulsive interaction between the coated particles in electroless nickel (EN) solution were calculated by the classical DLVO theory. Sedimentation tests were conducted to verify the modelling. The calculation predictions are well in agreement with the experimental results. The Al2O3 coating could reduce van der Waals attraction by enlarging the surface separation distance of diamond particles, and could increase electrical double layer repulsion by increasing the surface potentials in EN solution. Consequently, it could weaken the net attractive interaction, whose net attractive force decreased from −3.77×10−2N/m between bare particles to −1.12×10−2N/m between the coated ones, a reduction by 70%, at the separation distance of 1κ−1. The coated diamond particles in EN solution show a slower settling rate than bare ones. The Al2O3 coating contributes to the high dispersability of the coated particles under the agitation condition.

Diamond particle, DLVO theroy, Electroless solution., Inorganic coating, Interaction energy, Interaction force
0032-5910
899-906
Liu, Ping
41ff5c8a-4b8a-4010-b1a9-eb6d03716591
Zhu, Yongwei
2101b32a-7e60-4d69-9771-ee3cfe1af91f
Zhong, Gaoyan
4122f394-9978-4435-874b-5e8356d19a31
Zhao, Xiao
70e12f26-5ece-46cd-a186-3cac70e99a6f
Wang, Shuncai
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Liu, Ping
41ff5c8a-4b8a-4010-b1a9-eb6d03716591
Zhu, Yongwei
2101b32a-7e60-4d69-9771-ee3cfe1af91f
Zhong, Gaoyan
4122f394-9978-4435-874b-5e8356d19a31
Zhao, Xiao
70e12f26-5ece-46cd-a186-3cac70e99a6f
Wang, Shuncai
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1

Liu, Ping, Zhu, Yongwei, Zhong, Gaoyan, Zhao, Xiao, Wang, Shuncai and Yang, Shoufeng (2019) Influence of inorganic coating over diamond particles on interaction force and dispersability in electroless solution. Powder Technology, 342, 899-906. (doi:10.1016/j.powtec.2018.10.059).

Record type: Article

Abstract

The inorganic coating of Al2O3 was introduced on nanoparticles to weaken their tendency of agglomeration in electroless plating bath. The influence of the coating on interaction energy and interaction forces between the coated particles was evaluated in this study. The Al2O3-coated diamond particles were prepared by the heterogeneous nucleation process. The attractive interaction and repulsive interaction between the coated particles in electroless nickel (EN) solution were calculated by the classical DLVO theory. Sedimentation tests were conducted to verify the modelling. The calculation predictions are well in agreement with the experimental results. The Al2O3 coating could reduce van der Waals attraction by enlarging the surface separation distance of diamond particles, and could increase electrical double layer repulsion by increasing the surface potentials in EN solution. Consequently, it could weaken the net attractive interaction, whose net attractive force decreased from −3.77×10−2N/m between bare particles to −1.12×10−2N/m between the coated ones, a reduction by 70%, at the separation distance of 1κ−1. The coated diamond particles in EN solution show a slower settling rate than bare ones. The Al2O3 coating contributes to the high dispersability of the coated particles under the agitation condition.

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More information

Accepted/In Press date: 27 October 2018
e-pub ahead of print date: 30 October 2018
Published date: 15 January 2019
Keywords: Diamond particle, DLVO theroy, Electroless solution., Inorganic coating, Interaction energy, Interaction force

Identifiers

Local EPrints ID: 428994
URI: https://eprints.soton.ac.uk/id/eprint/428994
ISSN: 0032-5910
PURE UUID: 5f45d9ff-4849-4a53-84db-b2304ce270f8
ORCID for Shoufeng Yang: ORCID iD orcid.org/0000-0002-3888-3211

Catalogue record

Date deposited: 15 Mar 2019 17:30
Last modified: 16 Mar 2019 01:31

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Contributors

Author: Ping Liu
Author: Yongwei Zhu
Author: Gaoyan Zhong
Author: Xiao Zhao
Author: Shuncai Wang
Author: Shoufeng Yang ORCID iD

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