Photonic crystal hydrogel membrane with pH value and ionic strength response, preparation method and application thereof
A technology of photonic crystals and ionic strength, which is applied in the direction of ferrous oxides, analysis of materials through chemical reactions, and material analysis through observation of the influence of chemical indicators, can solve the problem of preparation of photonic crystal hydrogels. Problems such as long cycle, difficult preparation, and inaccurate control of carboxyl content can achieve the effect of easy large-scale preparation, strong reproducibility, and short preparation time
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[0033] The photonic crystal hydrogel film provided by the invention, its preparation method, comprises the following steps:
[0034] (1) Preparation of photonic crystal hydrogel precursor: Fe 3 o 4Nanoparticles, acrylamide, hydroxyethyl methacrylate, methylene bisacrylamide and photoinitiator are uniformly dispersed in the organic solution to obtain a suspension of photonic crystal hydrogel precursor, so that each milliliter of photonic crystal hydrogel precursor Fe in body 3 o 4 Nanoparticles 1mg-50mg, preferably 10mg-30mg, more preferably 10mg-20mg, acrylamide 100mg-600mg, preferably 200mg-400mg, hydroxyethyl methacrylate 10mg-500mg, preferably 20mg-40mg, more preferably 30mg-40mg, Forked bisacrylamide 1mg~20mg, and photoinitiator 0.1mg~1mg. The photoinitiator is a commonly used photoinitiator in the art, preferably 2,2-diethoxyacetophenone. Described organic solvent is preferably conventional dispersing solvents such as methanol, ethanol, ethylene glycol, polyethylene ...
Embodiment 1
[0046] A photonic crystal hydrogel film, prepared according to the following method:
[0047] (1) Preparation of photonic crystal hydrogel precursor: Fe 3 o 4 Nanoparticles, acrylamide, hydroxyethyl methacrylate, methylene bisacrylamide and photoinitiator are uniformly dispersed in ethylene glycol by ultrasonic dispersion method to obtain a suspension of photonic hydrogel crystal precursor, so that each Fe in ml photonic crystal hydrogel precursor 3 o 4 1 mg of nanoparticles, 100 mg of acrylamide, 10 mg of hydroxyethyl methacrylate, 1 mg of methylenebisacrylamide, and 0.1 mg of photoinitiator 2,2-diethoxyacetophenone.
[0048] The Fe 3 o 4 Nanoparticles are prepared as follows: dissolve ferrocene and hydrogen peroxide in 75ml of acetone, and add the solution to a 100mL stainless steel reaction kettle, so that the concentration of ferrocene in the solution is 0.001mg / ml, and the concentration of hydrogen peroxide is 0.01mg / ml; react at 100°C for 10 hours, after the react...
Embodiment 2
[0052] A photonic crystal hydrogel film, prepared according to the following method:
[0053] (1) Preparation of photonic crystal hydrogel precursor: Fe 3 o 4 Nanoparticles, acrylamide, hydroxyethyl methacrylate, methylene bisacrylamide and photoinitiator are uniformly dispersed in glycerin by ultrasonic dispersion method to obtain a suspension of photonic hydrogel crystal precursor, so that each milliliter of photon Fe in crystalline hydrogel precursors 3 o 4 1 mg of nanoparticles, 100 mg of acrylamide, 10 mg of hydroxyethyl methacrylate, 1 mg of methylenebisacrylamide, and 0.1 mg of photoinitiator 2,2-diethoxyacetophenone.
[0054] The Fe 3 o 4 Nanoparticles are prepared as follows: dissolve ferrocene and hydrogen peroxide in 75ml of acetone, and add the solution to a 100mL stainless steel reaction kettle, so that the concentration of ferrocene in the solution is 0.001mg / ml, and the concentration of hydrogen peroxide is 0.01mg / ml; react at 100°C for 10 hours, after th...
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