Preparation method of hydrophobic association type cationic polyacrylamide
A technology of polyacrylamide and hydrophobic association, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of flocculation efficiency and treatment object range limitation, random distribution of cations, and inability of hydrophobic components to play a role, so as to improve Excellent solid-liquid separation performance, good flocculation performance, and convenient operation
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Embodiment 1
[0024] Embodiment 1: a kind of preparation method of hydrophobic association type cationic polyacrylamide comprises the following steps:
[0025] Step 1: Add 15.1ml of deionized water to the reaction device; 6.47g of sodium polyacrylate (PAAS) with a molecular weight of 3400; 4.71g of acryloyloxyethyltrimethylammonium chloride (DAC) (nDAC: nPAAS=1 :1); 12.0g of acrylamide (AM) monomer; 0.337g of lauryl acrylate (LA); 1.3g of nonionic surfactant Tween80 and stirred evenly until the monomer was completely dissolved to form a uniform micellar solution. AM monomer and DAC monomer in the polymerization system are the total monomers, so the mass fraction of the total monomers in the reaction system is 40%.
[0026] In the second step, add 0.07 g of urea to the above-mentioned monomer micelle solution as a solubilizer, use HCl as a pH regulator to adjust the pH value of the micellar copolymerization system to 4, continuously feed high-purity nitrogen into the reaction device for 15 m...
Embodiment 2
[0030] Embodiment 2: a kind of preparation method of hydrophobic association type cationic polyacrylamide comprises the following steps:
[0031]In the first step, add 24.24ml of deionized water to the reaction device; 4.05g of sodium polyacrylate (PAAS) solution with a molecular weight of 3400; 2.94g of acryloyloxyethyltrimethylammonium chloride (DAC) (nDAC: nPAAS= 1:1); Acrylamide (AM) monomer 7.5g; Lauryl acrylate (LA) 0.211g; Non-ionic surfactant Tween80 0.8 g Stir well until the monomer is completely dissolved to form a uniform micellar solution, the micelles AM monomer and DAC monomer are the total monomers in the copolymerization system, so the mass fraction of the total monomers in the reaction system is 25%.
[0032] In the second step, add 0.26g urea to the above-mentioned monomer micelle solution as a solubilizer, adjust the pH value of the micelle copolymerization system to 4 with HCl as a pH regulator, and continuously feed high-purity nitrogen into the reaction d...
Embodiment 3
[0036] Embodiment 3: a kind of preparation method of hydrophobic association type cationic polyacrylamide comprises the following steps:
[0037] In the first step, add 17.82ml of deionized water to the reaction device; 9.71g of sodium polyacrylate (PAAS) with a molecular weight of 5700; 7.06g of acryloyloxyethyltrimethylammonium chloride (DAC) (nDAC: nPAAS=1 :1); acrylamide (AM) monomer 4.0g; methyl acrylate (MA) 0.53g; nonionic surfactant Tween80 0.8g and stir until the monomer is completely dissolved to form a uniform micellar solution, and the micelles are copolymerized The AM monomer and DAC monomer in the system are the total monomers, so the mass fraction of the total monomers in the reaction system is 25%.
[0038] In the second step, add 0.069g urea to the above-mentioned monomer micelle solution as a solubilizer, use HCl as a pH regulator to adjust the pH value of the micellar copolymerization system to 6, continuously feed high-purity nitrogen into the reaction devi...
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