▎ 摘　　要

NOVELTY - Photosensitive water-soluble chitosan derivative is prepared by dissolving chitosan and phthalic anhydride using anhydrous N,N-dimethylformamide, reacting mixture to obtain product (A), dissolving photosensitive monomer, diisocyanate and dibutyltin dilaurate using anhydrous N,N-dimethylformamide, reacting mixture to obtain product (B), mixing e.g. product (A) and product (B), reacting mixture to obtain product (C), adding deionized water to hydrazine hydrate solution, reacting mixture, adding obtained product to product (C), and processing obtained product. USE - The photosensitive water-soluble chitosan derivative is used for dispersing graphene, and in carbon nanotubes. ADVANTAGE - The photosensitive water-soluble chitosan derivative has less toxicity and good solubility. DETAILED DESCRIPTION - Photosensitive water-soluble chitosan derivative is prepared by (a) dissolving chitosan and phthalic anhydride using anhydrous N,N-dimethylformamide, and reacting obtained mixture at 110-130 degrees C for 7-9 hours to obtain product (A), (b) dissolving photosensitive monomer, diisocyanate and dibutyltin dilaurate (which is catalyst) using anhydrous N,N-dimethylformamide, and reacting obtained mixture at 40-60 degrees C for 4-6 hours to obtain product (B), and (c) mixing the product (A), product (B), anhydrous N,N-dimethylformamide and dibutyltin dilaurate, reacting obtained mixture at 80-100 degrees C for 8-12 hours to obtain product (C), adding deionized water to hydrazine hydrate solution, reacting obtained mixture at 100-120 degrees C for 10-14 hours, adding obtained product to product (C) in a drop-wise manner in ice bath, carrying out precipitation and suction filtration, and vacuum drying obtained product.