▎ 摘　　要

NOVELTY - A quantum titanium fiber material is prepared by spinning hybrid materials of quantum dots, silk fibroin and polymer material. The quantum dots are graphene/titanium dioxide composite quantum dots. The graphene/titanium dioxide composite quantum dots include sulfur, nitrogen co-doped graphene/titanium dioxide composite quantum dots, sulfur, nitrogen co-doped titanium dioxide/graphene composite quantum dots, and sulfur, nitrogen co-doped graphene/sulfur, nitrogen co-doped titanium dioxide composite quantum dots. The polymer material comprises 22-42 pts. wt. polyethyleneimine, 15-28 pts. wt. alginic acid and 3-8 pts. wt. gelatin. The quantum titanium fiber material is prepared by: (1) preparing graphene/titanium dioxide composite quantum dots; and (2) dispersing the quantum dots obtained in the step (1) in deionized water, then adding a dispersant, and performing ultrasonic dispersion to obtain a graphene/titanium dioxide composite quantum dot dispersion. USE - The quantum titanium fiber material is useful in textile fabrics. ADVANTAGE - The quantum titanium fiber material: has excellent breathability, antibacterial properties, UV resistance, antistatic properties, and durability and healthcare effects; solves the problem that the current silk fabric has a single function and poor durability; and meets the demand of people on multifunctional clothes. The woven fabric has UV protection factor of much larger than 30, T(UVA) of much less than 5% and antibacterial rate of more than 90%. DETAILED DESCRIPTION - A quantum titanium fiber material is prepared by spinning hybrid materials of quantum dots, silk fibroin and a polymer material. The quantum dots are graphene/titanium dioxide composite quantum dots. The graphene/titanium dioxide composite quantum dots include sulfur, nitrogen co-doped graphene/titanium dioxide composite quantum dots, sulfur, nitrogen co-doped titanium dioxide/graphene composite quantum dots, and sulfur, nitrogen co-doped graphene/sulfur, nitrogen co-doped titanium dioxide composite quantum dots. The polymer material comprises 22-42 pts. wt. polyethyleneimine, 15-28 pts. wt. alginic acid and 3-8 pts. wt. gelatin. The quantum titanium fiber material is prepared by: (1) preparing graphene/titanium dioxide composite quantum dots by dissolving tetrabutyl titanate and glacial acetic acid in deionized water, stirring and mixing to obtain a titanium dioxide precursor solution, then adding citric acid, thioglycolic acid and cysteine, stirring and reacting in a reaction vessel at 130-180 degrees C for 6-24 hours, adding ethanol and centrifuging; (2) dispersing the graphene/titanium dioxide composite quantum dots obtained in the step (1) in deionized water, then adding a dispersant, performing ultrasonic dispersion at 1000-2000 W for 1-3 hours to obtain a graphene/titanium dioxide composite quantum dot dispersion; (3) dissolving alginic acid and gelatin in deionized water, then adding limestone powder, stirring and reacting for 2-3 hours, then adding polyethyleneimine, performing ultrasonic dispersion and blending to form a polymer solution (A); and (4) degumming silk raw material with sodium hydroxide aqueous solution to obtain an alkaline solution of silk fibroin, then adding the polymer solution (A) obtained in the step (3), stirring and reacting until the mixed solution is neutral, then adding the graphene/titanium dioxide composite quantum dot dispersion obtained in the step (2), carrying out ultrasonic dispersion to obtain a spinning solution, subjecting the spinning solution to wet spinning at 35-40 degrees C, stretching 1-3 times the obtained nascent fiber, followed by immersing in a 5 wt.% calcium ion solution for 24-48 hours, and carrying out heat treatment at 60-120 degrees C.