Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 823, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.153837
Keywords
Hyperbranched polysiloxane; Graphene-like MoS2; Mechanical performance; Frictional behavior
Categories
Funding
- National Natural Science Foundation of China [21875188]
- Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University [CX201820]
- Natural Science Basic Research Plan in Shaanxi Province of China [2018JM2024]
- Shaanxi Key Research and Development Plan [2019ZDLGY04-08]
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In this article, graphene/MoS2 nanosheets (rGO/MoS2) functionalized by a novel hyperbranched polysiloxane (HBPSi) containing cyclophosphazene (HBPSi-CPP) were synthesized by a precipitation polymerization approach. We doped different loading amounts of HBPSi-CPP@rGO/MoS2 as solid lubricating filler into bismaleimide (BMI) resin to produce HBPSi-CPP@rGO/MoS2/BMI hybrid composite materials. The morphology and structure of HBPSi-CPP@rGO/MoS2 as well as the mechanical and tribological properties of BMI composites were systematically investigated. The results exhibited that 0.8 wt% BMI system got the peak values of the bending and impact strengths (187.8 MPa and 22.4 kJ/m(2)), which are the highest values of rGO-based materials for BMI matrix in open literatures. Moreover, for 0.4 wt% BMI sample, its average frictional coefficient and abrasion rate get the minimum values of 0.26 and 1.6 x 10(-6) mm(3)/(N.m), separately. This is attributed to the good dispersibility and self-lubrication of HBPSi-CPP@rGO/MoS2 as well as the improved inorganic-organic compatibility between HBPSi-CPP@rGO/MoS2 nanomaterial and BMI resin. (C) 2020 Elsevier B.V. All rights reserved.
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