Ionic polymer and graphene oxide nano composite film and preparation method and application thereof
An ionic polymer and nanocomposite technology, applied in the field of separation membranes, can solve the problems of reducing the retention effect of small-sized nanometer impurities, human health and environmental threats, and poor process controllability, so as to reduce membrane preparation time and improve water treatment. Quantity and applicability
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Embodiment 1
[0030] 1. Ultrasonic dispersion of graphene oxide (GO) in water to obtain a GO nanosheet dispersion with a mass concentration of 0.1%;
[0031] 2. Stir with 1g BPPO and 10mL NMP until completely dissolved, then add 0.2g 1,2-dimethylimidazole and stir at 20°C for 12h to generate imidazole-functionalized brominated polyphenylene ether, dilute with water to obtain imidazole with a mass concentration of 0.1% Functionalized brominated polyphenylene ether solution;
[0032] 3. Take 5 mL of the GO dispersion prepared in step 1 and 0.5 mL of the imidazole-functionalized brominated polyphenylene ether solution prepared in step 2 and mix evenly, and vacuum filter on a polyvinylidene fluoride membrane with a pore size of 200 nm to obtain a cationic polymer and Graphene oxide composite film, preserved in water.
[0033] 4. Application: fix the above-mentioned cationic polymer and graphene oxide composite film loaded on the polyvinylidene fluoride membrane in a filter device, and treat th...
Embodiment 2
[0035] 1. Ultrasonic dispersion of graphene oxide (GO) in water to obtain a dispersion of GO nanosheets with a mass concentration of 0.001%;
[0036] 2. Stir with 1g BPPO and 20mL NMP until completely dissolved, then add 0.5g 1,2-dimethylimidazole and stir at 70°C for 5h to generate imidazole-functionalized brominated polyphenylene ether, dilute with water to obtain imidazole with a mass concentration of 0.001% Functionalized brominated polyphenylene ether solution;
[0037] 3. Take 500mL of the GO nanosheet dispersion prepared in step 1 and 500mL of the imidazole-functionalized brominated polyphenylene ether solution prepared in step 2 and mix evenly, and vacuum filter on a polyacrylonitrile membrane with a pore size of 450nm to obtain the cationic polymer and Graphene oxide composite film, preserved in water.
[0038] Carry out scanning electron microscope (SEM) test to the cationic polymer that present embodiment step 3 obtains and graphene oxide composite thin film surfac...
Embodiment 3
[0041] 1. Ultrasonic dispersion of graphene oxide (GO) in water to obtain a dispersion of GO nanosheets with a mass concentration of 0.001%;
[0042] 2. Stir with 1g BPPO and 20mL NMP until completely dissolved, then add 0.5g 1,2-dimethylimidazole and stir at 70°C for 5h to generate imidazole-functionalized brominated polyphenylene ether, dilute with water to obtain imidazole with a mass concentration of 0.1% Functionalized brominated polyphenylene ether solution;
[0043]3. Take 500mL of the GO nanosheet dispersion prepared in step 1 and 5mL of the imidazole-functionalized brominated polyphenylene ether solution prepared in step 2 and mix evenly, and vacuum filter on a polyacrylonitrile membrane with a pore size of 450nm to obtain the cationic polymer and Graphene oxide composite film, preserved in water.
[0044] 4. Application: fix the above-mentioned cationic polymer and graphene oxide composite film loaded on the polyacrylonitrile membrane in the filter device, and treat...
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