Preparation method of porous material with higher mechanical strength
A technology of porous materials and mechanical strength, applied in the field of preparation of porous materials, can solve the problems of reduced theoretical plate number, reduced separation efficiency, low mechanical strength, etc., and achieve the effect of improving mechanical strength, broadening application fields, and good application prospects
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Embodiment 1
[0032] Take 2.0 g of citric acid, heat it at 200°C for 5 min, add 100 mL of sodium hydroxide solution with a concentration of 10 mg / mL under vigorous stirring, and dialyze the solution with a dialysis bag with a molecular weight cut-off of 1000 to remove excess sodium hydroxide. The filtrate was dialyzed to neutrality. The dialyzed solution was freeze-dried to obtain a brown-yellow powder.
[0033] Weigh 0.5 g of polyvinyl alcohol and dissolve it in 100 mL of deionized water, add 0.05 g of sodium lauryl sulfate, 0.05 g of sodium sulfate and 0.05 g of hydroquinone, mix and dissolve thoroughly to obtain a continuous phase.
[0034] Mix 0.05g of benzoyl peroxide, 0.1g of hexadecane, 1.0g of Span 80, 1.0g of a mixture of acrylamide and vinylimidazole (the mass ratio of the two is 1:1) and 0.5g of ethyl Diol dimethacrylates were mixed, mixed evenly, and 80W ultrasonic for 30min to obtain a dispersed phase.
[0035] The continuous phase and the dispersed phase were mixed under nit...
Embodiment 2
[0037] The difference from Example 1 is that 2.0 g of citric acid was taken, heated at 200°C for 30 min, and under vigorous stirring, 100 mL of sodium hydroxide solution with a concentration of 10 mg / mL was added, and the solution was dialyzed with a dialysis bag with a molecular weight cut-off of 1000. Excess sodium hydroxide was removed, and the filtrate was dialyzed to neutrality. The dialyzed solution was freeze-dried to obtain a brown-yellow powder.
[0038] Weigh 1.0 g of polyvinyl alcohol and dissolve it in 100 mL of deionized water, add 20 g of the above-prepared GQDs, 1.0 g of sodium lauryl sulfate, 1.5 g of sodium sulfate and 1.3 g of hydroquinone, fully mix and dissolve, to obtain the continuous phase.
[0039] Mix 0.1g of benzoyl peroxide, 0.2g of hexadecane, 1.5g of Span 80, 2.0g of a mixture of acrylamide and vinylimidazole (the mass ratio of the two is 1:3) and 1.5g of ethyl The diol dimethacrylates are mixed and dissolved to obtain a dispersed phase.
[0040...
Embodiment 3
[0042] The difference from Example 2 is that 4.0 g of citric acid was taken, heated at 200° C. for 60 min, and under vigorous stirring, 200 mL of sodium hydroxide solution with a concentration of 10 mg / mL was added, and the solution was dialyzed with a dialysis bag with a molecular weight cut-off of 1000. Excess sodium hydroxide was removed, and the filtrate was dialyzed to neutrality. The dialyzed solution was freeze-dried to obtain a brown-yellow powder.
[0043]The preparation method of the GQDs functionalized monomer is as follows: put 0.2 g of the prepared GQDs powder in 10 ml of DMF solution, add 40 ml of thionyl chloride solution under the protection of nitrogen, stir at 0 °C for 1 h to obtain the acid chloride GQDs, centrifuge Wash with anhydrous tetrahydrofuran and freeze-dry, then use 0.07g allylamine and 0.2g acyl chloride GQDs in 50ml DMF solution, react for 1h at 25°C to obtain GQDs functionalized monomer After centrifugation, wash with absolute ethanol and freeze...
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