A kind of large flux forward osmosis hollow fiber membrane and preparation method thereof
A fiber membrane and forward osmosis technology, applied in the field of membrane separation, can solve the problem of low space utilization
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[0021] As an aspect of the technical solution of the present invention, it relates to a method for preparing a large-flux forward osmosis hollow fiber membrane, which includes:
[0022] Provide a mixed reaction system comprising at least a polymer, a functional monomer, an initiator, an additive, and a solvent, and heat the mixed reaction system in a protective atmosphere so that the functional monomer undergoes a polymerization-crosslinking reaction to form a semi-interpenetrating network structure, obtain spinning solution;
[0023] And, co-extrude the spinning solution and the core solution containing the acid chloride monomer through the spinneret, and then immerse in the coagulation bath containing the amine monomer to solidify to form a hollow fiber membrane, and make the acid chloride The interfacial polymerization of the monomer and the amine monomer occurs instantaneously on the inner wall and the outer wall of the hollow fiber membrane to form a loose ultrathin polya...
Embodiment 1
[0051] (1) Add 5 grams of polysulfone, 0.5 grams of acrylic acid, 20 grams of polyethylene glycol and 74.5 grams of dimethyl sulfoxide into the reaction kettle, blow nitrogen, and continue stirring at 130 ° C until completely dissolved, then add 0.1 grams of azobisiso Butyronitrile initiates the polymerization of acrylic acid, and reacts at 60°C for 60 hours to obtain spinning solution;
[0052] (2) the n-hexane solution of the isophthaloyl chloride of 0.01% by the described spinning solution and the mass percent concentration is co-extruded through the spinneret by the metering pump, stays in the air for 0.5 seconds, then immerses the mass percent concentration of Solidified in 0.01% m-phenylenediamine aqueous solution to form a membrane, washed, heat treated at 60° C. for 0.5 minutes, dried, and rolled up to obtain a large-flux forward osmosis hollow fiber membrane.
[0053] After testing, the thickness of the polyamide layer of the hollow fiber membrane prepared in this emb...
Embodiment 2
[0055] (1) Add 35 grams of sulfonated polysulfone, 15 grams of methacrylic acid, 0.01 grams of graphene and 49.99 grams of N-methylpyrrolidone into the reaction kettle, blow nitrogen, and continue to stir at 20 ° C until completely dissolved, then add 5 grams of even Azodiisobutyronitrile initiates the polymerization of methacrylic acid, and reacts at 150°C for 0.5 hours to obtain a spinning solution;
[0056] (2) the n-hexane solution of the terephthaloyl chloride of 10% by the described spinning solution and the mass percent concentration is co-extruded through the spinneret by a metering pump, stays in the air for 60 seconds, and then immerses in a mass percent concentration of Solidified in 10% o-phenylenediamine aqueous solution to form a membrane, washed, heat treated at 120° C. for 10 minutes, dried, and rolled up to obtain a large-flux forward osmosis hollow fiber membrane.
[0057] After testing, the thickness of the polyamide layer of the hollow fiber membrane prepar...
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Abstract
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