title: High-efficient production of boron nitride nanosheets via an optimized ball milling process for lubrication in oil.
abstract: Although tailored wet ball milling can be an efficient method to produce a large quantity of two-dimensional nanomaterials, such as boron nitride (BN) nanosheets, milling parameters including milling speed, ball-to-powder ratio, milling ball size and milling agent, are important for optimization of exfoliation efficiency and production yield. In this report, we systematically investigate the effects of different milling parameters on the production of BN nanosheets with benzyl benzoate being used as the milling agent. It is found that small balls of 0.1-0.2 mm in diameter are much more effective in exfoliating BN particles to BN nanosheets. Under the optimum condition, the production yield can be as high as 13.8% and the BN nanosheets are 0.5-1.5 μm in diameter and a few nanometers thick and of relative high crystallinity and chemical purity. The lubrication properties of the BN nanosheets in base oil have also been studied. The tribological tests show that the BN nanosheets can greatly reduce the friction coefficient and wear scar diameter of the base oil.
authors.affiliation: 1] Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, Victoria 3216, Australia [2] Indian Oil Corporation Limited, R&D Centre, Sector 13, Faridabad, Haryana 121007, India.
authors.lastname: Deepika
authors.affiliation: Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, Victoria 3216, Australia.
authors.forename: Lu Hua
authors.initials: LH
authors.lastname: Li
authors.affiliation: 1] Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, Victoria 3216, Australia [2] Melbourne Centre for Nanofabrication, 151 Wellington Rd, Clayton, VIC 3168, Australia.
authors.forename: Alexey M
authors.initials: AM
authors.lastname: Glushenkov
authors.affiliation: Indian Oil Corporation Limited, R&D Centre, Sector 13, Faridabad, Haryana 121007, India.
authors.forename: Samik K
authors.initials: SK
authors.lastname: Hait
authors.affiliation: Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, Victoria 3216, Australia.
authors.forename: Peter
authors.initials: P
authors.lastname: Hodgson
authors.affiliation: Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, Victoria 3216, Australia.
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen