CELLULOSE PRE-TREATING METHOD CELLULOSE ESTERIFICATION METODE INCLUDING THE SAME AND TRANSPARENCE FILM COMPRISING CELLULOSE ESTER PRODUCED BY THE SAME

摘要

The present invention relates to a method for producing a cellulose-cellulose composite material, which comprises the steps of adding ethanol to a dispersion containing cellulose and water, and irradiating ultrasound waves to the cellulose-cellulose hybrid material or cellulose-water mixture to convert the hydrogen bond between the cellulose- Thereby further increasing the surface area. [MEANS FOR SOLVING PROBLEMS] According to an embodiment of the present invention, the above object can be accomplished by a method of manufacturing an ultrasound diagnostic system, comprising the steps of: irradiating ultrasonic waves onto a dispersion containing cellulose and water; irradiating ultrasound waves And a third ultrasonic wave irradiation step of further adding a fatty acid to the dispersion and then irradiating the ultrasonic wave again.