The invention relates to a preparation method of a high-performance
cellulose triacetate
forward osmosis membrane. The preparation method comprises the following steps: (1) preparing membrane
casting fluid which is prepared from
cellulose triacetate, N-methylpyrrolidinone,
acetone and
lactic acid: adding the
lactic acid into a binary mixed
solvent of the
acetone and the N-methylpyrrolidinone, performing ultrasonic treatment for 1-10min to ensure that the
lactic acid and the binary mixed
solvent are sufficiently and uniformly mixed, then adding a membrane material, namely the
cellulose triacetate, controlling the temperature to 30-60 DEG C, and performing mechanical stirring for dissolving so as to obtain the uniform membrane
casting fluid; (2) performing sufficient deaeration on the membrane
casting fluid at 30-60 DEG C, and performing membrane scraping on a glass plate; (3) immersing the glass plate with a
thin layer of the membrane casting fluid in a gel coagulation bath of 10-50 DEG C, performing phase separation and membrane formation, then soaking the glass plate in deionized
reclaimed water for 3-8d, after surplus solvents are removed, taking out the glass plate, and performing natural airing so as to obtain the
cellulose triacetate forward osmosis membrane. Compared with the prior art, the preparation method disclosed by the invention has the advantages that the technological process is simple, requirements on equipment are low, preparation conditions are easy to control, and besides,
mass production is easy to perform.