A kind of cellulose nanofiber hydrogel and preparation method thereof
A nanofiber, cellulose technology, applied in fiber treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of high cost, limited adsorption performance of visible light catalysts, complicated operation, etc. simple conditional effect
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[0040] The present invention also proposes a preparation method of cellulose nanofiber hydrogel, combining figure 1 The schematic flow chart of the preparation method of the shown cellulose nanofiber hydrogel, the preparation method of the cellulose nanofiber hydrogel comprises the following steps:
[0041] S40, placing the cellulose nanofibers in deionized water, and dispersing them into a suspension.
[0042] S50, adding an initiator to the suspension, stirring and mixing, sequentially adding monomer a, monomer b and N,N-methylenebisacrylamide to undergo a polymerization reaction to prepare a cellulose nanofiber hydrogel.
[0043]Wherein, monomer a is at least one of acrylic acid and its alkali metal salts, ammonium salts and organic amine salts, and methacrylic acid and its alkali metal salts, ammonium salts and organic amine salts;
[0044] Monomer b is one or both of acrylamide and methacrylamide.
[0045] Wherein, the initiator is persulfate or peroxide, and the added ...
Embodiment 1
[0064] First weigh 0.8g of cellulose acetate powder in 5ml of acetone-dimethylacetamide (2:1, v:v) mixed solvent, stir magnetically in a screw-top vial for 1.5h until dissolved, and prepare after standing still for defoaming Form a uniform spinning stock solution; put the stock solution into a 5ml medical syringe tube (the diameter of the injection needle is 0.6mm), and use electrospinning technology at a working voltage of 20KV, a solution flow rate of 1ml / h, and a distance from the needle tip to the drum of 15cm Spinning under certain conditions to prepare cellulose acetate nanofibers; immerse cellulose acetate nanofibers in sodium hydroxide ethanol solution for 24 hours to promote in-situ hydrolysis and reduction of cellulose acetate components in nanofibers to cellulose. After the reaction After washing with alcohol, washing with water and drying, the cellulose nanofibers are obtained. Weigh 1 g of cellulose nanofibers and place them in deionized water, fully swell and dis...
Embodiment 2
[0070] First weigh 0.8g of cellulose acetate powder in 5ml of acetone-dimethylacetamide (2:1, v:v) mixed solvent, stir magnetically in a screw-top vial for 1.5h until dissolved, and prepare after standing still for defoaming Form a uniform spinning stock solution; put the stock solution into a 5ml medical syringe tube (the diameter of the injection needle is 0.6mm), and use electrospinning technology at a working voltage of 20KV, a solution flow rate of 1ml / h, and a distance from the needle tip to the drum of 15cm Spinning under certain conditions to prepare cellulose acetate nanofibers; immerse cellulose acetate nanofibers in sodium hydroxide ethanol solution for 24 hours to promote in-situ hydrolysis and reduction of cellulose acetate components in nanofibers to cellulose. After the reaction After washing with alcohol, washing with water and drying, the cellulose nanofibers are obtained. Weigh 1 g of cellulose nanofibers and place them in deionized water, fully swell and dis...
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