▎ 摘　　要

NOVELTY - Preparation of graphene-wrapped up-converting fluorescent cotton fiber involves immersing cotton fabric in aqueous solution of terminal amino-terminated hyperbranched polymer-modified ytterbium, erbium/thulium-doped sodium yttrium fluoride, rinsing using deionized water, drying, obtaining finishing layer on the surface of cotton fabrics, dipping cotton fabric in graphene oxide aqueous solution, repeatedly washing using ethanol and deionized water, drying, placing in reducing agent, washing, suction-filtering and vacuum drying. USE - Preparation of graphene-wrapped up-converting fluorescent cotton fiber (claimed). DETAILED DESCRIPTION - Preparation of graphene-wrapped up-converting fluorescent cotton fiber involves placing cotton fabric in 20 %mass sodium hydroxide solution in the bath ratio of 1:50, reacting at 90 degrees C for 120 minutes, washing repeatedly using deionized water to neutral, drying, obtaining sodium hydroxide-modified cotton fabric, redispersing resultant fabric in deionized water in the bath ratio of 1:50, adding trimethylallyl ammonium chloride such that the mass ratio of trimethyl allyl ammonium chloride and sodium hydroxide-modified cotton is 1:5-1:10, reacting at 60-80 degrees C for 1-24 hours, repeatedly washing using deionized water, drying, obtaining trimethylallyl ammonium chloride-modified cotton fabric, redispersing resultant fabric in deionized water in the bath ratio of 1:50, gradually adding 1-100 g/L polyamidoamine (PAMAM) aqueous solution, reacting at 75-95 degrees C for 60-120 minutes, removed after cleaning, drying, obtaining cationized cotton fabric, formulating terminal amino-terminated hyperbranched polymer-modified ytterbium, erbium/thulium-doped sodium yttrium fluoride and terminal hydroxyl hyperbranched polymer-modified ytterbium, erbium/thulium-doped sodium yttrium fluoride into 0.1-5 g/L aqueous solution, immersing cationized cotton fabric in the aqueous solution of terminal hydroxyl hyperbranched polymer-modified ytterbium, erbium/thulium-doped sodium yttrium fluoride at 80 degrees C for 10-60 minutes in the bath ratio of 1:10, removing, rinsing using deionized water, drying, further immersing the cotton fabric in aqueous solution of terminal amino-terminated hyperbranched polymer-modified ytterbium, erbium/thulium-doped sodium yttrium fluoride at 80 degrees C for 10-60 minutes in the bath ratio of 1:10, rinsing using deionized water repeatedly, drying, obtaining finishing layer on the surface of cotton fabrics, dipping cotton fabric in 1-10 g/L graphene oxide aqueous solution for 10-60 minutes in the bath ratio of 1:50, repeatedly washing using ethanol and deionized water, drying, placing in reducing agent, washing, suction-filtering and vacuum drying.