▎ 摘　　要

NOVELTY - A graphene oxide/calcium carbonate shell biomimetic composite membrane material is prepared by soaking stainless steel net in graphene oxide and sodium carbonate mixed solution, rinsing with distilled water, drying, soaking in calcium chloride solution, reacting, soaking in distilled water to rinse, drying, and repeating steps. USE - Method for preparing graphene oxide/calcium carbonate shell biomimetic composite membrane material used for separating the oil-water mixture (claimed). ADVANTAGE - The method is simple and environment-friendly. The product is super-hydrophilic underwater super oleophobic film material.