The present invention includes an aqueous phase, an oily phase, and an adsorption phase at the interface of these two phases, wherein the adsorption layer is an “oil-in-water” emulsion comprising a lignin matrix incorporating metal oxide nanoparticles, wherein the lignin is It is present in an amount of less than 2% by weight, in particular 0.5% to 2% by weight, based on the total weight of the emulsion, the metal oxide nanoparticles being 1.5% by weight or less, in particular 0.5 to 1.5%. It relates to an “oil-in-water” emulsion, characterized in that it is present in an amount of mass%. [Selection figure] None本発明は水性相、油性相及びこれらの２つの相の界面にある吸着相を含み、該吸着層は金属酸化物ナノ粒子を取り込んだリグニンマトリックスからなる「水中油型」エマルジョンにおいて、前記リグニンはエマルジョンの総質量に対して２質量％未満、特に０．５質量％～２質量％の量で存在し、前記金属酸化物ナノ粒子は１．５質量％以下、特に０．５～１．５質量％の量で存在することを特徴とする、「水中油型」エマルジョンに関する。【選択図】なし
