▎ 摘　　要

NOVELTY - A dyeing materials preparation method involves preparing dye solution by adding deionized water to surface functionalized nano-graphene, followed by adding dispersing agent to the solution and stirring to obtain suspension. The suspension is added with sodium chloride and alum followed by heating at 40 degrees C, continuing heating to 70 degrees C, adding vegetable dyes, stirring the obtained solution, extracting upper solution and maintaining the solution, where ratio of sodium chloride and suspension is (1-5):50 and the dispersing agent is dispersing agent BYK-163. USE - Method for preparing dyeing materials that are utilized for dyeing straw (claimed). ADVANTAGE - The method enables preparing environment-friendly dyeing materials with better dyeing effect and long period storage capability. DETAILED DESCRIPTION - A dyeing materials preparation method involves preparing dye solution by adding 70-100 pts. wt. deionized water to 1-5 pts. wt. surface functionalized nano-graphene, followed by adding 0.5-2 pts. wt. dispersing agent to the solution and stirring to obtain suspension. The suspension is added with sodium chloride and 5-10 pts. wt. alum, followed by heating at 40 degrees C, continuing heating to 70 degrees C, adding 35-55 pts. wt. vegetable dyes, stirring the obtained solution, extracting upper solution and maintaining the solution at 70 degrees C for 2-3 hours, where ratio of sodium chloride and suspension is (1-5):50 and the dispersing agent is dispersing agent BYK-163.