A kind of preparation method of nano-cellulose superabsorbent resin
A technology of nanocellulose and water-absorbent resin, which is applied in the field of preparation of nanocellulose super-absorbent resin, can solve the problems of low water absorption rate and salt-resistant water absorption rate, etc., and achieves the effects of low price, enhanced reactivity and improved efficiency.
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Embodiment 1
[0031] A. Preparation of nanocellulose solution: immerse 100g of waste tea dregs in 1mol / L hydrochloric acid solution and oscillate for 2 hours. The soaking temperature is 70°C. Wash the waste tea dregs to neutrality; The acidified sodium chlorite solution is bleached at 50-60°C for 2 hours, and the number of bleaching times is 5 times, until the cellulose becomes white, and the tea residues after acidification are obtained; the tea residues after acidification are dried in a drying oven After crushing, the crushing time is 15 minutes, and the crushing particle size is 10 μm to obtain tea residue cellulose; add 20 ml distilled water to 0.05 g tea residue cellulose to prepare a nanocellulose solution, and ultrasonically disperse for 20 minutes.
[0032] B. Preparation of acrylamide solution: Weigh 7.50 g of acrylamide and add 10 ml of distilled water to prepare an acrylamide solution.
[0033] C. Preparation of sodium acrylate solution: Weigh 2.33g of sodium hydroxide and add 1...
Embodiment 2
[0037] The difference between this example and Example 1 is that the acid-hydrolyzed tea residues are dried in a drying oven and crushed for 20 minutes with a particle size of 50 μm to obtain tea residue cellulose; 0.15 g of tea residue cellulose Add 20ml of distilled water to make nanocellulose solution, and ultrasonically disperse for 20min.
Embodiment 3
[0039] The difference between this example and Example 1 is that 20ml of distilled water was added to 0.25g of tea residue cellulose to prepare a nanocellulose solution, and the solution was ultrasonically dispersed for 20 minutes.
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