Synthesis And Research On Water-dispersible Macromolecules Lubricant Additives

The lubricant as metal processing and mechanical equipment operation an integral partof our lives. But there are nearly500to1,000tons of waste oil products discharged to thenature all over the world every year.It caused serious pollution on the environment due toits physiological toxicity to plants and animals and their biological recalcitrance. In orderto solve this real problem, now on the basis of various lubricating additives, this article isbased on the Green, and combined with the lubricant performance, research anddevelopment of a class of water-dispersible macromolecular lubricity additives, they werethe performance yield analysis, the conclusion of the best conditions for its production, andthe best results.Dimer acid, oleic acid, ethylene diamine and polyethylene glycol as a raw material,using a two-step synthetic method, the first step is ethylenediamine at both ends of theamine with dimer acid carboxyl group at one end and oleic acid were amidated carboxy, abridge-like structure is formed, dimer acid and oleic good lubricity, rust resistance, as wellas certain anti-extrusion blend within a product. The second step is to make this product toproduce good water-soluble polyethylene glycol esterified dimer acid remaining period ofthe carboxyl group, the entire macromer is to produce good water dispersion properties forthe use of the hydrophilic polyethylene glycol. Average molecular weight of thepolyethylene glycol were selected300,400,600,800and1000were synthesized. Amidationyield and the yield of the target product variable test by single factor analysis, screeningminimal impact factor, and then orthogonal experiment to determine the optimal synthesisprocess route of the target product: dimer acid and oleic acid, ethylene diamine andpolyethylene glycol ratio of raw materials, amidation reaction temperature of100℃, thereaction time was1h.1:1.2:1.2:1.15; esterification reaction temperature was160°C, thereaction time of4h.Evaluation of the target product to the actual structure of the product analysis, infraredspectroscopy to characterize the functional groups of the target product, the characteristicabsorption peak of the objectives envisaged in the beginning of the molecular designproduct functional groups to prove the target product EDOP the synthesis. In applicationperformance, mainly to observe the effect of the water-dispersible product of1%aqueoussolution in the pressure of a single point of400N long grinding1minute size of the wearscar diameter combined with yield joint evaluation and comparison under SEM observationthe best formula products under the same conditions with liquid paraffin base oil wear scarand wear scar diameter size. And several best product compound the effect of complexanalysis.Proved by infrared spectroscopy Synthesis of the target product EDOP the optimumformula by orthogonal test synthesis yield of78.2%, the best product obtained EDOP10001%aqueous solution of an aqueous dispersion effect is quite good, and in the400N pressure grinding one minute long wear scar diameter0.449mm, liquid paraffin base oil under thesame conditions the wear scar diameter is0.523mm, under SEM also proved this point.Complex illustrates the type of multiplexing ratio to produce the type of lubricatingproperties and water-dispersing effect, but overall, in the case of the common system of anaqueous dispersion of the better lubrication performance is also better.