Preparation method of textile waste cellulose based sewage flocculant
A technology based on textile waste and cellulose, which is applied in the field of biomass material preparation, can solve the problems of high production cost and non-natural degradation, and achieve the effects of reducing dependence, environmental protection, and improving biodegradable performance
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Embodiment 1
[0017] 1) Put the waste cotton yarn in a sodium hydroxide solution with a concentration of 10g / L at a bath ratio of 1:30, boil at 100°C for 0.5h, wash with hot water until neutral, and then place it in a solution with a concentration of 15g / L In a mixed solution composed of sodium hydroxide, 2g / L sodium polyphosphate and 1g / L sodium silicate, boil at 100°C for 0.5h, wash with hot water until neutral, and dry to obtain completely degummed Cellulose, its α-cellulose content is 98.0wt%;
[0018] 2) Add the degummed cellulose obtained in step 1) into a dimethyl sulfoxide solution with a mass fraction of 10wt%. The mass ratio of the dimethyl sulfoxide solution to the degummed cellulose is 80:1. Nitrogen gas was introduced for 20 minutes at ℃, then cooled to 100 ℃, N-methylmorpholine oxide with a mass fraction of 6wt% was added, and stirred continuously at 80 ℃ for 20 minutes to obtain a uniform and transparent cellulose solution;
[0019] 3) The cellulose solution obtained in step...
Embodiment 2
[0021] 1) Put cotton linters in a sodium hydroxide solution with a concentration of 10g / L at a bath ratio of 1:30, boil at 100°C for 0.5h, wash with hot water until neutral, and then place them in a concentration of 15g / L In a mixed solution composed of 1 L of sodium hydroxide, 2 g / L of sodium polyphosphate and 1 g / L of sodium silicate, boil for 1 hour at 100 ° C, wash with hot water until neutral, and dry to obtain completely degummed Cellulose, its α-cellulose content is 97.5wt%;
[0022] 2) Add the degummed cellulose obtained in step 1) into the dimethyl sulfoxide solution with a mass fraction of 8wt%, the mass ratio of the dimethyl sulfoxide solution to the degummed cellulose is 90:1, fully soaked, Nitrogen gas was introduced for 20 minutes at ℃, then cooled to 100 ℃, N-methylmorpholine oxide with a mass fraction of 8 wt % was added, and stirred continuously at 80 ℃ for 30 minutes to obtain a uniform and transparent cellulose solution;
[0023] 3) The cellulose solution o...
Embodiment 3
[0025] 1) Put flax waste yarn in a sodium hydroxide solution with a concentration of 10g / L at a bath ratio of 1:30, boil at 100°C for 1 hour, wash with hot water until neutral, and then place it at a concentration of 15g / L In a mixed solution composed of sodium hydroxide, 2g / L sodium polyphosphate and 1g / L sodium silicate, boil at 100°C for 2 hours, wash with hot water until neutral, and dry to obtain completely degummed fibers element, its α-cellulose content is 94.5wt%;
[0026] 2) Add the degummed cellulose obtained in step 1) into a dimethyl sulfoxide solution with a mass fraction of 6wt%, and the mass ratio of the dimethyl sulfoxide solution to the degummed cellulose is 100:1. Nitrogen was introduced at ℃ for 20 minutes, then cooled to 100 ℃, N-methyl morpholine oxide with a mass fraction of 10wt% was added, and stirred continuously at 80 ℃ for 40 minutes to obtain a uniform and transparent cellulose solution;
[0027] 3) The cellulose solution obtained in step 2) was pa...
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