Functional hydrogel-based electrochromic device and preparation method thereof
An electrochromic device and electrochromic technology are applied in the directions of instruments, nonlinear optics, optics, etc., which can solve the problems of complex devices and non-environmental protection, and achieve the effects of simple preparation process, simple structure and simple preparation.
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[0031] Such as figure 1 As shown, the preparation method of the functional hydrogel-based electrochromic device provided by the embodiment of the present invention includes the following steps:
[0032] S101: Using acrylamide as monomer, N,N-dimethylbisacrylamide as crosslinking agent, ammonium persulfate as thermal initiator, 4-hydroxy-2,2,6,6-tetramethylpiperidine oxidation The polyacrylamide hydrogel was prepared using the compound as a catalyst;
[0033] S102: adding a solution containing electrolytes, electro-alkali, and alkali-responsive molecules to the hydrogel at room temperature, and absorbing it by the swelling effect of the hydrogel to obtain a functionalized hydrogel;
[0034] S103: The hydrogel is sandwiched between two ITO glass electrodes to obtain an electrochromic device based on a functional hydrogel.
[0035] The preparation method of the functional hydrogel-based electrochromic device provided by the embodiment of the present invention specifically inclu...
Embodiment 1
[0044] The embodiment of the present invention prepares an electrochromic device that can be reversibly switched between yellow and green, including;
[0045] Step 1, preparation of polyacrylamide hydrogel: 2.2mol / L acrylamide was dissolved in 5mL deionized water, and 6*10 -4 Acrylamide quality of N,N-dimethylbisacrylamide, 1.7*10 -3 Ammonium persulfate of acrylamide quality was stirred to dissolve, and then nitrogen gas was bubbled for 5 minutes to remove oxygen in the solution. Then add 2.5*10 -3 4-hydroxy-2,2,6,6-tetramethylpiperidine oxide of acrylamide quality, put the obtained solution into a vacuum oven, heat and polymerize at 60°C for 12h. After washing several times with deionized water to remove residual acrylamide monomers, a colorless and transparent polyacrylamide hydrogel was obtained.
[0046] Step 2, the configuration of the aqueous solution with electrochromic function: weigh 10 -2 mol / L benzoquinone, 2*10 -2 mol / L of 4-OH-Tempo, 2*10 -3 mol / L alkali res...
Embodiment 2
[0052] The embodiment of the present invention prepares an electrochromic device that can be reversibly switched between yellow and red, including;
[0053] Step 1, preparation of polyacrylamide hydrogel: 2.2mol / L acrylamide was dissolved in 5mL deionized water, and 6*10 -4 Acrylamide quality of N,N-dimethylbisacrylamide, 1.7*10 -3 Ammonium persulfate of acrylamide quality was stirred to dissolve, and then nitrogen gas was bubbled for 5 minutes to remove oxygen in the solution. Then add 2.5*10 -3 4-hydroxy-2,2,6,6-tetramethylpiperidine oxide of acrylamide quality, put the obtained solution into a vacuum oven, heat and polymerize at 60°C for 12h. After washing several times with deionized water to remove residual acrylamide monomers, a colorless and transparent polyacrylamide hydrogel was obtained.
[0054] Step 2, the configuration of the aqueous solution with electrochromic function: weigh 10 -2 mol / L benzoquinone, 2*10 -2 mol / L of 4-OH-Tempo, 2*10 -3 mol / L alkali respo...
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