Compared with traditional surfactant-stabilised emulsions, Pickering emulsions, stabilised by clay nanoparticles, have the advantages of strong interface stability, strong versatility, and low toxicity. Moreover, they...Compared with traditional surfactant-stabilised emulsions, Pickering emulsions, stabilised by clay nanoparticles, have the advantages of strong interface stability, strong versatility, and low toxicity. Moreover, they have excellent application potential in the fields of food and medicine. In this study, a food-grade Pickering emulsion stabiliser was prepared by physically adsorbing the cationic surfactant ethyl lauroyl arginate (LAE) on the surface of nano-montmorillonite (NMMT). Different LAE/NMMT combinations were assessed for their capacity to stabilise an oil-in-water emulsion at a low solid concentration (0.5%, w/v). The controllability of the droplet diameter and stability of the Pickering emulsions can be realised by changing the content of LAE. Scanning electron microscopy (SEM), and laser confocal microscopy (CLSM) confirmed the successful preparation of sunflower oil Pickering emulsion droplets stabilised by LAE/NMMT (0.0075%/1%). Additionally, the LAE/NMMT studied in this work could be used as a highly effective antibacterial surfactant with inorganic nanoparticles to efficiently stabilise Pickering emulsions, thus expanding the potential of preparing edible Pickering emulsion formulae.展开更多
Three types of nano-montmorillonite were doped as additives to afford lubricating greases.The physicochemical,insulating,and tribological performances of the obtained lubricating greases were investigated in detail.Fu...Three types of nano-montmorillonite were doped as additives to afford lubricating greases.The physicochemical,insulating,and tribological performances of the obtained lubricating greases were investigated in detail.Furthermore,the tribological action mechanisms were analyzed by high magnification optical microscope,Raman spectroscopy,and energy dispersive X-ray spectroscope (EDS).The results show that the inorganic modification montmorillonite (IOMMT) can significantly increase the number of electron traps in the base grease,leading to excellent insulating performances.Moreover,IOMMT as a novel lubricant additive (1.5 wt％ in grease) significantly enhances the friction reducing and anti-wear abilities for steel/steel contact that comprises a unique layered structure to prevent friction between the contact pairs and the protective tribofilm generated by physical adsorption and chemical reaction.展开更多
文摘Compared with traditional surfactant-stabilised emulsions, Pickering emulsions, stabilised by clay nanoparticles, have the advantages of strong interface stability, strong versatility, and low toxicity. Moreover, they have excellent application potential in the fields of food and medicine. In this study, a food-grade Pickering emulsion stabiliser was prepared by physically adsorbing the cationic surfactant ethyl lauroyl arginate (LAE) on the surface of nano-montmorillonite (NMMT). Different LAE/NMMT combinations were assessed for their capacity to stabilise an oil-in-water emulsion at a low solid concentration (0.5%, w/v). The controllability of the droplet diameter and stability of the Pickering emulsions can be realised by changing the content of LAE. Scanning electron microscopy (SEM), and laser confocal microscopy (CLSM) confirmed the successful preparation of sunflower oil Pickering emulsion droplets stabilised by LAE/NMMT (0.0075%/1%). Additionally, the LAE/NMMT studied in this work could be used as a highly effective antibacterial surfactant with inorganic nanoparticles to efficiently stabilise Pickering emulsions, thus expanding the potential of preparing edible Pickering emulsion formulae.
基金the National Natural Science Foundation of China，Beijing Natural Science Foundation of China
文摘Three types of nano-montmorillonite were doped as additives to afford lubricating greases.The physicochemical,insulating,and tribological performances of the obtained lubricating greases were investigated in detail.Furthermore,the tribological action mechanisms were analyzed by high magnification optical microscope,Raman spectroscopy,and energy dispersive X-ray spectroscope (EDS).The results show that the inorganic modification montmorillonite (IOMMT) can significantly increase the number of electron traps in the base grease,leading to excellent insulating performances.Moreover,IOMMT as a novel lubricant additive (1.5 wt％ in grease) significantly enhances the friction reducing and anti-wear abilities for steel/steel contact that comprises a unique layered structure to prevent friction between the contact pairs and the protective tribofilm generated by physical adsorption and chemical reaction.
