Polyionic liquid-polyacrylamide interpenetrating network hydrogel doped with quantum dots and preparation method thereof
A technology of polyacrylamide and interpenetrating network, which is applied in the field of interpenetrating network hydrogel and its preparation, polyionic liquid-polyacrylamide interpenetrating network hydrogel and its preparation field, which can solve the problem that hydrogel research is rarely and other problems, to achieve the effect of good fluorescence performance and simple operation
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[0031] (1) Preparation of NaHTe aqueous solution
[0032] In a 20mL small ampoule, add 32.0mg (0.25mmol) Te powder and 20.0mg (0.5mmol) NaBH 4 , Under magnetic stirring, 0.25 mL of deionized water bubbled with argon was added. After the reaction for 30min, the black Te powder gradually disappeared, the solution was pink to milky white, and the preparation of the NaHTe aqueous solution was completed.
[0033] (2) Preparation of CdTe quantum dots
[0034] In a three-necked flask filled with 400 mL of deionized water, add 114.0 mg (0.5 mmol) of CdCl 2 .2.5H 2 0, and 110.5mg (1.20mmol) mercaptoacetic acid to obtain a cadmium precursor solution, in the solution, nitrogen gas was bubbled for 60min, and ammonia water was added dropwise to adjust its pH value to about 9, and then in N 2 Add the freshly prepared NaHTe solution to the atmosphere and heat it to reflux. With the different reflux time, when the reflux time is 40min, 130min and 260min, respectively, green light (GQD), y...
Embodiment 1
[0036] (1) Michael addition of imidazole and trimethylolpropane triacrylate to prepare triimidazolyl compound (A 3 monomer), then add 1,2-dibromoethane (B) in an equimolar amount with the product 2 Monomer) is subjected to quaternization condensation reaction and bulk polymerized at 90°C for 5h to make it cross-linked to form a gel network. i.e. pre-pass A 3 +B 2 The method forms an imidazole-containing crosslinked polymer as a first network.
[0037] (2) dissolving the second monomer acrylamide in water to prepare a solution with a mass percentage concentration of 8%; add a crosslinking agent, and its mass percentage is 10% of the monomer; then add a thermal initiator ammonium persulfate, which The mass percentage is 1% of the monomer.
[0038] (3) adding a mass percentage of 0.8% polyionic liquid network to the aqueous solution of the above-mentioned monomer, initiator and cross-linking agent to fully swell it;
[0039] (4) polymerizing the obtained solution at 60 °C fo...
Embodiment 2
[0042] (1) Michael addition of imidazole and trimethylolpropane triacrylate to prepare triimidazolyl compound (A 3 monomer), then add 1,2-dibromoethane (B) in an equimolar amount with the product 2 Monomer) is subjected to quaternization condensation reaction and bulk polymerized at 90°C for 3h to make it cross-linked to form a gel network. i.e. pre-pass A 3 +B 2 The method forms an imidazole-containing crosslinked polymer as a first network.
[0043] (2) dissolving the second monomer acrylamide in water to prepare a solution with a mass percentage concentration of 10%; add a crosslinking agent, and its mass percentage is 2% of the monomer; then add a thermal initiator ammonium persulfate, which The mass percentage is 1% of the monomer;
[0044] (3) adding a mass percentage of 1% polyionic liquid network to the aqueous solution of the above-mentioned monomer, initiator and cross-linking agent to fully swell it;
[0045] (4) polymerizing the obtained solution at 60 °C for ...
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