▎ 摘　　要

NOVELTY - Method comprises (a) preparing graphene oxide (GO) nanosheet by Hummer's method, providing GO nanosheet as stable particles, dispersing octadecylamine in toluene as continuous phase, providing deionized water as dispersed phase, mixing continuous phase and dispersed phase, adding saturated sodium chloride solution as electrolyte, mechanically stirring to produce emulsion, washing with ethanol to remove toluene, demulsifying, centrifuging and vacuum drying, and (b) dispersing obtained nanosheet in deionized water A as a continuous phase, adding hexamethylene diisocyanate (HDI) as dispersed phase into the ionic liquid, mixing the continuous phase and disperse phase, adding sodium carbonate solution as electrolyte, emulsifying by shaking, then adding deionized water B to dilute to form an emulsion, dissolving 1,6-hexane diamine (HMDA) in deionized water C, adding emulsion, shaking, incubating, adding aqueous ammonia dilute solution, centrifuging, and vacuum drying. USE - The emulsion is useful in selective extraction and separation of 2,6-dichlorophenol (claimed). ADVANTAGE - The emulsion solves the problem existing in the conventional solvent extraction which causes secondary pollution and inconvenience in recovering the emulsion. DETAILED DESCRIPTION - Constructing encapsulated ion-liquid extraction material pickering emulsion, comprises (a) preparing graphene oxide (GO) nanosheet by Hummer's method, providing GO nanosheet as stable particles, dispersing octadecylamine in toluene as continuous phase, providing deionized water as dispersed phase, mixing continuous phase and dispersed phase, adding saturated sodium chloride solution as electrolyte, mechanically stirring to produce a high internal phase pickering emulsion, washing with ethanol to remove toluene, demulsifying, centrifuging and vacuum drying, and (b) dispersing obtained nanosheet in deionized water A as a continuous phase, adding hexamethylene diisocyanate (HDI) as dispersed phase into the ionic liquid containing 1-butyl-3-methyl imidazole hexafluorophosphate (BMIM) PF6 phase, mixing the continuous phase and disperse phase, adding sodium carbonate solution as electrolyte, emulsifying by shaking, then adding deionized water B to dilute to form an emulsion, dissolving 1,6-hexane diamine (HMDA) in deionized water C, adding the emulsion, shaking, incubating to obtain ionic liquid-water (IL/W) emulsion, adding aqueous ammonia dilute solution to quench the unreacted isocyanate functional group, centrifuging, and vacuum drying to obtain water-capsule ionic liquid (C-IL/W).