The invention discloses a preparation method for
perylene bisimide
polyurethane liquid crystal non-covalent modified
graphene. The preparation method comprises the following steps: adding
perylene and
zinc acetate into N-methyl pyrrolidone, stirring and heating to 150-160 DEG C, adding diglycolamine, reacting for 12 hours, pouring into absolute ethyl
alcohol for precipitating and discharging, filtering, and
drying in vacuum to obtain hydroxyl-terminated
perylene bisimide; taking and dissolving the hydroxyl-terminated perylene bisimide into N, N-
dimethyl formamide, adding
hexamethylene diisocyanate and a catalyst, heating to 60-65 DEG C and reacting for 6 hours under protection of N2, adding
polyethylene glycol, heating to 90-95 DEG C and reacting for 8 hours, pouring reaction liquid into
distilled water for precipitating and discharging, filtering, and
drying in vacuum to obtain perylene bisimide
polyurethane liquid crystals; and taking and dissolving the perylene bisimide
polyurethane liquid crystals into
chloroform, adding
graphene, ultrasonically treating for 2-3 hours, carrying out suction
filtration, washing by
chloroform, and
drying in vacuum to obtain the perylene bisimide polyurethane
liquid crystal non-covalent modified
graphene. The method disclosed by the invention has the advantages of being wide in material source, simple in process, low in price, small in
pollution and the like.