High-durability nitrile butadiene rubber (NBR) composites are crucial for the long-term safe operation of related electrical equipment. However
the microstructure and comprehensive properties of traditional NBR composites reinforced with nanospherical particles do not meet the durability requirements. Therefore
this study employed a green aqueous compounding technology to introduce graphene oxide (GO) with excellent water dispersibility into NBR latex. This yielded a well-dispersed GO/NBR masterbatch
which was further compounded with other components to prepare NBR composites co-reinforced by the lamellar filler GO and the spherical nanofiller carbon black. Compared to traditional carbon black and lamellar kaolin clay
GO enhanced the nanofiller network
strengthened the interaction with NBR rubber molecular chains
and increased the crosslink density. At a GO content of only 2 phr (parts per hundred rubber)
the modulus and tensile strength of the composites were higher than those of systems reinforced with carbon black or kaolin clay. Most importantly
the crack growth rate of the GO-reinforced NBR composite was reduced by 26.0%
and the critical tear energy was increased by 31.6%
compared to the traditional carbon black reinforced NBR composites.
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