Preparation method of a chemically cross-linked photonic crystal hydrogel with tunable color
A chemical cross-linking and photonic crystal technology, which is applied in the field of photonic crystal hydrogel preparation, can solve the problems of poor mechanical strength of nano-gels, achieve the effect of solving weak mechanical strength, temperature responsiveness, and expanding application value
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Embodiment 1
[0026] 1. Preparation of colloidal crystal hydrogel solution:
[0027] (1) Dissolve 3.7903g of NIPAM, 0.3808g of HEAA, 0.0725g of N,N'-methylenebisacrylamide and 0.1095g of sodium lauryl sulfate in 250g of deionized water, blow N2 at room temperature to remove oxygen, and magnetically stir 120 minutes;
[0028] (2) The reaction temperature was raised to 70°C and kept for 40 minutes under the protection of N2;
[0029] (3) Add 0.17g of ammonium persulfate to the above solution, keep the N2 atmosphere, and continue to react for 4 hours;
[0030] (4) Then soak the obtained reactants in deionized water and dialyze for 7 days, change the water once a day to remove the residual reaction raw materials and electrolytes in the reaction system. The molecular weight cut-off of the dialysis bag used is 8000-14000. Instantly.
[0031] 2. Curing treatment of colloidal crystal hydrogel:
[0032] Put the obtained colloidal crystal hydrogel solution in an oven to heat and concentrate, adj...
Embodiment 2
[0034] 1. Preparation of colloidal crystal hydrogel solution:
[0035] (1) Dissolve 3.7903g of NIPAM, 0.3808g of HEAA, 0.0725g of N,N'-methylenebisacrylamide and 0.1095g of sodium lauryl sulfate in 250g of deionized water, blow N2 at room temperature to remove oxygen, and magnetically stir 120 minutes;
[0036] (2) The reaction temperature was raised to 70°C and kept for 40 minutes under the protection of N2;
[0037] (3) Add 0.17g of ammonium persulfate to the above solution, keep the N2 atmosphere, and continue to react for 4 hours;
[0038] (4) Then soak the obtained reactants in deionized water and dialyze for 7 days, change the water once a day to remove the residual reaction raw materials and electrolytes in the reaction system. The molecular weight cut-off of the dialysis bag used is 8000-14000. Instantly.
[0039] 2. Curing treatment of colloidal crystal hydrogel:
[0040] Put the obtained colloidal crystal hydrogel solution into an oven to heat and concentrate, a...
Embodiment 3
[0042] 1. Preparation of colloidal crystal hydrogel solution:
[0043](1) Dissolve 3.7864g NIPAM, 0.3960g HEAA, 0.0701g N,N'-methylenebisacrylamide and 0.0505g sodium lauryl sulfate in 250g deionized water, blow N2 at room temperature to remove oxygen, and magnetically stir 120 minutes;
[0044] (2) The reaction temperature was raised to 70°C and kept for 40 minutes under the protection of N2;
[0045] (3) Add 0.17g of ammonium persulfate to the above solution, keep the N2 atmosphere, and continue to react for 4 hours;
[0046] (4) Then soak the obtained reactants in deionized water and dialyze for 7 days, change the water once a day to remove the residual reaction raw materials and electrolytes in the reaction system. The molecular weight cut-off of the dialysis bag used is 8000-14000. Instantly.
[0047] 2. Curing treatment of colloidal crystal hydrogel:
[0048] Put the obtained colloidal crystal hydrogel solution in an oven to heat and concentrate, adjust its concentr...
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