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Boron nitride nanosheets reinforced waterborne polyurethane coatings for improving corrosion resistance and antifriction properties
journal contribution
posted on 2018-07-01, 00:00 authored by J Li, L Gan, Yuchen LiuYuchen Liu, Srikanth MatetiSrikanth Mateti, Weiwei LeiWeiwei Lei, Ying (Ian) ChenYing (Ian) Chen, J YangEffective corrosion resistance and antifriction properties can prolong the durability of coatings. We demonstrate that hexagonal boron nitride (BN) nanosheets can be employed as the reinforcement in waterborne polyurethane (PU)-matrix composite coatings and lead to a significant improvement in their corrosion protection properties. The impedance modulus at 0.1 Hz dropped from 109Ω·cm2to 108Ω·cm2for 2% BN/PU coatings after 114 h immersion in 3.5 wt% NaCl electrolyte, while it dropped from 108Ω·cm2to 5 × 106Ω·cm2for neat PU coatings. The dynamic friction coefficient was decreased for 22.6% with the addition of 2 wt% BN in the PU composite coatings at 100 °C. The morphologies of the coating surfaces showed less abrasion than neat PU after the test. The major challenge of preparing BN/PU composite coatings was the dispersion of BN nanosheets in the waterborne polymer, which was solved by functionalization of BN nanosheets with hydroxyl groups.
History
Journal
European polymer journalVolume
104Pagination
57 - 63Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0014-3057Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2018, ElsevierUsage metrics
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