The application relates to the technical field of functional film preparation, and discloses a high-transparency low-
haze cellulose composite material and a preparation method thereof, which comprises the following preparation steps: S1, after alkali activation of refined cotton raw materials, monochloromethane and
propylene oxide are sequentially introduced to carry out reaction, and modified HPMC
powder is prepared; S2, after
sulfur hydrolysis of another refined cotton
raw material, alkali activation is carried out, and then
propylene oxide is introduced to carry out reaction, and a modified CNC
system suspension is prepared; S3, the modified HPMC
powder and the modified CNC
system are compounded, film forming, crosslinking and
drying, and a high-transparency low-
haze composite film is obtained. In the technical scheme, natural
cellulose raw materials are adopted, the compatibility of two phases is improved through homologous modification, the preparation process condition is mild, the obtained material is biodegradable, and the material has environmental friendliness and
functional stability.