▎ 摘　　要

NOVELTY - Preparing graphene oxide modified ether ester comprises e.g. (i) injecting graphite, phosphorus pentoxide, potassium persulfate into concentrated sulfuric acid and uniformly mixing to obtain reaction liquid A, (ii) carrying out the reaction by heating the reaction solution A, cooling to room temperature, and finally washing with deionized water until neutral, (iii) adding the obtained pre-oxide into concentrated sulfuric acid, stirring in cold water bath, slowly adding potassium permanganate and maintaining the temperature at specific temperature to obtain mixed liquid, (iv) reacting the mixed solution in water bath and heating by adding distilled water to obtain reaction liquid B, (v) pouring the reaction liquid B into distilled water, dropwise adding hydrogen peroxide until turns bright yellow, post-treating the reaction liquid B by centrifuging, carrying out dialysis treatment and ultrasonically dispersing to obtain aqueous dispersion of graphene oxide. USE - The graphene oxide is useful for preparing polymer polyol (claimed). ADVANTAGE - The graphene oxide: has good dispersion in the polymer matrix; provides large number of active points to form stable chemical bonds with the polymer matrix. DETAILED DESCRIPTION - Preparing graphene oxide modified ether ester comprises (i) injecting graphite, phosphorus pentoxide, potassium persulfate into concentrated sulfuric acid and uniformly mixing to obtain reaction liquid A, (ii) carrying out the reaction by heating the reaction solution A, cooling to room temperature, and finally washing with deionized water until neutral, (iii) adding the obtained pre-oxide into concentrated sulfuric acid, stirring in cold water bath, slowly adding potassium permanganate and maintaining the temperature at specific temperature to obtain mixed liquid, (iv) reacting the mixed solution in water bath and heating by adding distilled water to obtain reaction liquid B, (v) pouring the reaction liquid B into distilled water, dropwise adding hydrogen peroxide until turns bright yellow, post-treating the reaction liquid B by centrifuging, carrying out dialysis treatment and ultrasonically dispersing to obtain aqueous dispersion of graphene oxide, and (vi) uniformly and slowly adding the polymer polyol and azobisisobutyronitrile to aqueous dispersion of graphene oxide under nitrogen and condensing water to obtain graphene oxide/polymer polyol ether ester.