Adsorption and motion characteristics of charged droplet on sawtooth surfaces and machinability evaluation

Hu, Xiaodong; Yu, Jia Yuan; Guo, Guoqiang; Wang, Yangyu; Zhao, Yangyang; Xia, Yu; Xu, Yaoyun; Zhou, Ruihong; Zhang, Ruochong

doi:10.1007/s00170-023-10817-3

Cited by 1 publication

(1 citation statement)

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“…The contact angle of the former is slightly larger than that of the latter at the same charging voltage, which might be related to the formation of gel cluster by OA and SDS in nanofluid. Moreover, the contact angle of GO/OA nanofluid decreases by 7% and the surface tension decreases by 70% (figure 12(b)) when the charging voltage increases to −4 kV, which suggests a better wettability of the charged nanofluid droplets [42]. Besides, in terms of the surface tension, nanofluid decreases more dramatically with the increase of voltage than WO, which can be ascribed to the enhanced charging property and electrostatic repulsion after conductive graphene oxide added to WO [43].…”

Section: Lubrication Performances Of Go/oa Nanofluids Undermentioning

confidence: 98%

Design and tribological performance of graphene nanofluids dispersed by dragging effect of bicomponent gelator

Zhang,

Ding,

Zhang

et al. 2024

Nanotechnology

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Nanofluids have excellent lubrication and high thermal conductivity. However, the agglomeration and sedimentation produced by the large surface energy of nanoparticles in base liquid threaten the long-term dispersion stability and impact the wide application of nanofluid. In this work, based on the self-assemble behavior and continuous network structure formed by low molecular weight organic gelator (LMWOG), the uniform clusters were formed through regulating the kinetics behavior in the gelling process. The dragging effect was demonstrated by oleic acid - sodium dodecyl sulfate (OA-SDS) bicomponent gelator and graphene oxide (GO) nanosheets. The results showed that GO nanofluids dispersed by OA-SDS were stable for more than 12 months. The well-dispersed GO nanofluid exhibited better anti-friction and anti-wear properties under both immersion and electrostatic minimum quantity lubrication (EMQL) conditions. Moreover, the lower contact angle, surface tension and droplet size of nanofluids after charging improved the wettability on the frictional interface. The GO adsorption film formed on the friction interface protected the tribochemical reaction film of iron oxide and prevented the occurrence of sintering of base oil.

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Section: Lubrication Performances Of Go/oa Nanofluids Undermentioning

confidence: 98%