Method for modifying chitosan in nitrogen environment
A technology of chitosan and environment, applied in the field of chitosan, can solve the problems of low mechanical strength of chitosan fiber and can not reach practical application, so as to improve moisture absorption and moisturizing performance, reduce production cost, and have mild reaction conditions Effect
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Embodiment
[0020] Embodiment, the modification method of chitosan in a kind of nitrogen environment, comprises the steps:
[0021] S1. Slowly add water into the dilute acetic acid solution and mix to prepare a dilute acetic acid solution with a mass fraction of 10%, then dissolve chitosan in the dilute acetic acid solution with a mass fraction of 10%, and stir and mix at 30°C for 20 minutes to prepare Obtain acidified chitosan, wherein the mass of chitosan and the volume ratio of dilute acetic acid solution are 1g: 210ml;
[0022] S2, water is slowly added in the dilute hydrochloric acid solution and mixed to obtain a dilute hydrochloric acid solution with a mass fraction of 4%, then succinic anhydride is dissolved in a 4% dilute hydrochloric acid solution with a mass fraction, and mixed and stirred at normal temperature to obtain butyric anhydride. Diacid anhydride mixed solution, wherein the mass ratio of succinic anhydride to dilute hydrochloric acid solution is 1g:30ml, and the ph of...
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