| abstract |
The invention discloses the preparation method of a kind of chitosan and modified polyvinylalcohol composite membrane, this method comprises the following steps：(1) polyvinyl alcohol 124 and succinic anhydride are reacted to obtain modified polyvinylalcohol；(2) modified polyvinylalcohol is made into the 0.4wt% aqueous solution, is then added dropwise in the acetum that concentration is 0.4wt% chitosans and obtains mixed solution；(3) pH value of the mixed solution is adjusted with 0.01wt% NaOH solution to 5.5, blibbing is removed after standing 1 hour, obtains casting solution；(4) casting solution is poured into culture dish, the culture dish is placed in 60 DEG C of baking ovens and is dried to constant weight, obtains chitosan and modified polyvinylalcohol composite membrane.Material price used in this method is cheap, and reaction is uncomplicated, therefore product cost will not be too high, easily receives as medical anti-adhesive film application for most general patients. |