Preparation method of assembled membrane based on triazine porous organic nano particles
A nanoparticle assembly and nanoparticle technology, applied in the field of membrane separation, can solve problems such as poor solvent dispersion, poor interlayer force, and thick separation layer, and achieve the effects of simple preparation method, good stability, and high permeability selectivity
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[0021] The method for preparing a membrane based on triazine porous organic nanoparticles assembly described in this embodiment comprises the following steps:
[0022] 1) Add 0.05 to 1.0 parts by mass of triazine derivatives to 25 to 500 parts by mass of acetic acid aqueous solution, stir thoroughly to dissolve it; then add 0.2 to 1.2 parts by mass of 1,2-dicarbonyl The compound and 0.05-0.6 parts by mass of aldehyde compounds are reacted at 60-120° C. for 12-72 hours to obtain a triazine-based porous organic nanoparticle dispersion;
[0023] 2) Add 0.01 to 1.0 parts by mass of the above-mentioned triazine porous organic nanoparticle dispersion and 0.005 to 0.05 parts by mass of cationic polyelectrolyte to 200 to 600 parts by mass of water to prepare a mixed and diluted dispersion, and after ultrasonic treatment, Perform pressure filtration on the surface of the porous support membrane to form a membrane; then immerse the above-mentioned assembled membrane in the aqueous solut...
Embodiment 1
[0027] Add 0.05 g of 2,4,6-tris(4-aminophenyl)-1,3,5-triazine into 25 g of 10% acetic acid aqueous solution, and stir magnetically at 500 rpm for 1 hour to dissolve; Then add 0.2g aceguvaldehyde and 0.05g formaldehyde to the above solution, and react at 60°C for 72 hours to obtain a dispersion of triazine porous organic nanoparticles; mix 0.01g of the above dispersion of triazine porous organic nanoparticles and 0.005g Polysaccharides were added to 200g water to prepare a mixed and diluted dispersion. After ultrasonication at 28KHZ for 15 minutes, the above mixed and diluted dispersion was filtered on the surface of a polysulfone ultrafiltration membrane under an operating pressure of 0.05Mpa; Dialdehyde aqueous solution, cross-linking reaction at 15° C. for 2 hours, take out and remove the residual aqueous solution on the surface of the membrane, wash with deionized water, and obtain a triazine-based porous organic nanoparticle assembly membrane.
[0028] Triazine porous orga...
Embodiment 2
[0030] Add 1 g of 2,4,6-tris(4-aminophenyl)-1,3,5-triazine into 500 g of 50% acetic acid aqueous solution, stir magnetically at 1500 rpm for 3 hours to dissolve it; then Add 1.2g aceglyoxal and 0.6g formaldehyde to the above solution, and react at 120°C for 12 hours to obtain a triazine porous organic nanoparticle dispersion; 1g of the above triazine porous organic nanoparticle dispersion and 0.05g chitosan Add it to 600g of water to prepare a mixed and diluted dispersion. After ultrasonication at 40KHZ for 5 minutes, filter the above mixed and diluted dispersion on the surface of polysulfone ultrafiltration membrane under the operating pressure of 0.20Mpa; then immerse the obtained membrane in 2% glutaraldehyde In the aqueous solution, the cross-linking reaction was carried out at 35°C for 0.5 hours, the residual aqueous solution on the surface of the membrane was taken out and removed, and after washing with deionized water, the assembled membrane based on triazine porous org...
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