Trimethylolpropane trioleate (TMPTO) could significantly reduce environmental pollution compared to mineral oils. In this study, oleic acid (OA) and trimethylolpropane (TMP) were used to synthesize TMPTO, and the synthesis process was optimized by single-factor experiments to obtain the highest yield. First, two kinds of operating conditions (vacuum distillation and atmospheric reflux) were compared, and then four kinds of catalysts were investigated to select the most efficient catalyst in esterification. Afterward, five reaction parameters were investigated, and the optimal conditions obtained were as follows: catalyst/TMP, 3.2:1 (molar ratio) 2% (w/w) OA/TMP; temperature, 180 °C; reaction time, 3 h; and vacuum degree, 0.095 MPa. Under the optimized conditions, the TMP conversion rate reached up to 92.8%. Furthermore, TMPTO was confirmed by Fourier transform infrared spectroscopy (FTIR). Finally, the typical properties of the product were evaluated, including the kinematic viscosity at 40 and 100 °C, viscosity index, solidifying point, and thermal oxidation stability of TMPTO.

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A nano ZnO/polyaniline composites was obtained in situ polymerization of polyaniline nano zinc oxide surface, using ammonium persulfates as the oxidant, through a silane coupling agent KH550. And the secondary Doped Nanometer ZnO/polyaniline was obtained using HCl, phosphoric acid and sulfosalicylic acid. The relative magnitude of the conductivity of different acids in 1mol/L was studied. A new anticorrosive coating was obtained by blending the relatively higher electrical conductivity of ZnO/polyaniline doped by HCl and sulfosalicylic acid with the epoxy resin, then the corrosion resistance of the coating was analyzed by open circuit potential (OCP) and Tafel curve. The results showed that, nano ZnO/polyaniline exhibited better corrosion resistance compared with single polyaniline coating.