Preparation method of a magnetically induced self-healing nanocomposite hydrogel

[0029] 1. Add 1.35g of ferric chloride hexahydrate, 3.6g of anhydrous sodium acetate and 1g of polyvinylpyrrolidone into 40ml of ethylene glycol, stir magnetically for 30 minutes to obtain a uniform yellow mixed solution, and then pour it into a 50ml volume of polyfour In a vinyl fluoride container, react at a high temperature of 200°C for 12 hours, cool to room temperature, and successively wash with ethanol and water to obtain magnetic nanoparticles, and dry them naturally for use.

[0030] 2. Pass ammonia gas into the ethanol until it is saturated, disperse 10 mg of the magnetic nanoparticles (i.e. ferric oxide) prepared in step 1 in 30 ml of ethanol (10% ammonia gas) containing saturated ammonia gas, and mechanically stir Disperse evenly, then add 300 μ L concentration of 0.2mol / L chloroauric acid hydrate aqueous solution, mix and stir for 2 hours, the noble metal nanomaterial grows on the surface of the magnetic nanoparticle; this step synthesizes the metal nanoparticle by...

[0037] 1. Add 1.35g of ferric chloride hexahydrate, 3.6g of anhydrous sodium acetate and 1g of polyvinylpyrrolidone into 40ml of ethylene glycol, stir magnetically for 30 minutes to obtain a uniform yellow mixed solution, and then pour it into a 50ml volume of polyfour In a vinyl fluoride container, react at a high temperature of 200°C for 12 hours, cool to room temperature, and successively wash with ethanol and water to obtain magnetic nanoparticles, and dry them naturally for use.

[0038] 2. Pass ammonia gas into ethanol until it is saturated, disperse 20 mg of magnetic nanoparticles (i.e. ferric oxide) prepared in step 1 in 30 ml of ethanol (10% ammonia gas) containing saturated ammonia gas, and mechanically stir Disperse evenly, then add 600 μL of 0.2mol / L aqueous chloroauric acid tetrahydrate solution, mix and stir for 2 hours, the noble metal nanomaterials grow on the surface of the magnetic nanoparticles; this step synthesizes metal nanoparticles by reducing the noble ...

[0045] 1. Add 1.35g of ferric chloride hexahydrate, 3.6g of anhydrous sodium acetate and 1g of polyvinylpyrrolidone into 40ml of ethylene glycol, stir magnetically for 30 minutes to obtain a uniform yellow mixed solution, and then pour it into a 50ml volume of polyfour In a vinyl fluoride container, react at a high temperature of 200°C for 12 hours, cool to room temperature, and successively wash with ethanol and water to obtain magnetic nanoparticles, and dry them naturally for use.

[0046] 2. Disperse 10 mg of the magnetic nanoparticles obtained in step 1 in deionized water, then add the functional modifier allyl thiol, and perform ultrasonic treatment at room temperature for 5-10 minutes to obtain a surface-modified nanoparticle composite; the allyl thiol The added mass is 0.02% of the mass of the magnetic nanoparticle dispersion liquid.

[0047] 3. Under nitrogen protection, the monomer acrylamide and the initiator potassium persulfate were sequentially added to the surfa...