Nonaqueous In-situ Synthesis and Tribological Characteristics of Ultra-Dispersity-Stability ZnS Nanoparticles
OU Zhong-wen
LIU Wei-min
MA Shi-ning
CHEN Guo-xu
Abstract：The oil-soluble zinc naphthenate and isocyanate hyper-dispersion stabilizer were suc-cessfully synthesized. The ZnS nanoparticles(n-ZnS) were synthesized in-situ in liquid paraffin containing zinc naphthenate and hyper-dispersion stabilizer. The size, size distribution and con-glomeration behavior of n-ZnS in dispersion were observed by the freeze-etching replication transmission electron microscopy technique. Formation and dispersion stability mechanism of n-ZnS were investigated. The tests of normal and high speed centrifuge were used for evalua-ting the dispersion stability of n-ZnS. Tribological characteristics of the lubricants in the pres-ence and absence of n-ZnS were investigated by the block-on-ring and four ball tribo-test. The results show that the n-ZnS are grain shape with 40 nm size and single-particle-dispersion prop-erties, which didn't come into being sedimentation through 72 h centrifuge tests and 56 h in-termittent high speed centrifuge tests. The n-ZnS Nano-dispersion exhibited antiwear property as well as extreme pressure property. The tribological characteristics of oil samples take a turn for better with n-ZnS content adding in the range of experiment. And the extreme pressure properties are heading for stability when n-ZnS contents of oil samples are weight percent of 0.25%.
Keywords：ZnS nanoparticlesultra-dispersity-stabilitynonaqueous in-situ synthesistriho-logical characteristics
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 367-372 )