| 摘要 |
<p>Disclosed herein is a process for producing an injectable solid chitosan powder which can substitute human soft tissues. The process is carried out by any one of the following processes: a process including freezing an aqueous chitosan solution, grinding the frozen chitosan solution, and lyophilizing the grinded chitosan solution; a process including freezing an aqueous chitosan solution, lyophilizing the chitosan solution to form a lump of chitosan with a sponge structure, and grinding the lump of chitosan into fine particles; a process including scattering an aqueous chitosan solution to make a mist form using an ultrasonic vibrator, cooling the chitosan mist to obtain ice powder of chitosan, and lyophilizing the ice powder of chitosan; and a process including scattering an aqueous chitosan solution using an ultrasonic vibrator or a sprayer, dipping the scattered chitosan in isopropyl alcohol at low temperature to obtain chitosan precipitates, and lyophilizing the chitosan precipitates.</p> |
