A green sizing agent of modified tungsten disulfide-modified coconut oil/waterborne polyurethane (WP-MCO/WPU) was innovatively prepared for improving the tribological properties of single AlO fiber (single AF). This sizing agent formed by WS-PEG as an emulsifier with MCO and WPU showed good viscosity stability, wettability, thermal and dispersion stability. Subsequently, the effects of CO, MCO and WS-PEG concentrations on the tribological properties of fibers were investigated. When the sizing agent contained 15 wt% of MCO-3 (esterification ratio: 5:1), the coefficient of friction (COF) was reduced from 0.2 (CO/WPU@single AF) to 0.121 (MCO-3/WPU@single AF), and a lubricant oil film was generated on the friction surface, the anti-friction was improved. However, with the increase of friction frequency and normal load, the oil film of MCO-3/WPU@single AF was destroyed and the anti-wear performance deteriorated. The sizing agent containing WS-PEG (WP-MCO-3/WPU@single AF) had better anti-friction and superior anti-wear performance than without WS-PEG (MCO-3/WPU@single AF). The COF was reduced from 0.121 to an ultra-low value of 0.056, and a dense lubricating film was exhibited of WP-MCO-3/WPU@single AF under high-frequency, high-load friction conditions. From mechanism analysis, the improved lubrication performance was attributed to the polarity and boundary lubrication of MCO, the unique load-bearing structure and friction-reducing of WS-PEG. In conclusion, this sizing agent had attractive prospect in improving the wear resistance of ceramic fibers.

中文翻译：

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WS2改性椰子油/WPU施胶剂对单层Al2O3纤维表面超低摩擦和高耐磨性能的研究


创新制备了改性二硫化钨改性椰子油/水性聚氨酯（WP-MCO/WPU）绿色浆料，用于改善单根Al2O纤维（单AF）的摩擦学性能。这种以WS-PEG为乳化剂与MCO和WPU形成的施胶剂表现出良好的粘度稳定性、润湿性、热稳定性和分散稳定性。随后，研究了CO、MCO和WS-PEG浓度对纤维摩擦学性能的影响。当施胶剂中MCO-3含量为15 wt%（酯化比为5:1）时，摩擦系数（COF）由0.2（CO/WPU@single AF）降低至0.121（MCO-3/WPU@single AF）。 AF），在摩擦表面生成润滑油膜，提高减摩性能。然而，随着摩擦频率和正常载荷的增加，MCO-3/WPU@single AF的油膜被破坏，抗磨性能恶化。含有WS-PEG的施胶剂(WP-MCO-3/WPU@single AF)比不含WS-PEG的施胶剂(MCO-3/WPU@single AF)具有更好的减摩和优越的抗磨性能。 COF从0.121降低至0.056的超低值，WP-MCO-3/WPU@single AF在高频、高负载摩擦条件下表现出致密的润滑膜。从机理分析，润滑性能的改善归因于MCO的极性和边界润滑、WS-PEG独特的承载结构和减摩作用。综上所述，该浆料在提高陶瓷纤维耐磨性能方面具有良好的应用前景。