Preparation method of sulfonic acid type amphoteric polyelectrolyte nanoparticle hybrid polyamide nanofiltration membrane

A nanoparticle and polyelectrolyte technology, applied in chemical instruments and methods, membrane technology, semipermeable membrane separation, etc., can solve problems such as easy aggregation, high manufacturing cost of nanomaterials, and membrane defects, so as to improve transmission efficiency, high water Effect of permeability and stain resistance, good stain resistance

Active Publication Date: 2014-09-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the existing reports, these modified materials still have problems such as ineffective modification, high manufacturing cost of nanomaterials, easy aggregation in the membrane, and defects in the membrane.

Method used

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  • Preparation method of sulfonic acid type amphoteric polyelectrolyte nanoparticle hybrid polyamide nanofiltration membrane
  • Preparation method of sulfonic acid type amphoteric polyelectrolyte nanoparticle hybrid polyamide nanofiltration membrane
  • Preparation method of sulfonic acid type amphoteric polyelectrolyte nanoparticle hybrid polyamide nanofiltration membrane

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preparation example Construction

[0018] The preparation method of the sulfonic acid type amphoteric polyelectrolyte nanoparticle hybrid polyamide nanofiltration membrane comprises the following steps:

[0019] (1) Dissolve 10-30 parts by mass of sulfobetaine monomer and 5-10 parts by mass of cationic monomer in 50-200 parts by mass of an aqueous solution, blow nitrogen into it, and add 0.1-1 part by mass of water-soluble Initiator, at 40-60 o Polymerize at C for 6-12 hours, precipitate the polymer with acetone, and wash it several times to obtain a sulfonic acid-type amphoteric cationic polymer, which is vacuum-dried for later use;

[0020] (2) Dissolve 1 to 3 parts by mass of sodium carboxymethylcellulose and 0.5 to 2 parts by mass of sulfonic acid type amphoteric cationic polymer in 100 to 500 parts by mass of acidic aqueous solution, and then dissolve the sulfonic acid type amphoteric cationic polymer The acidic aqueous solution of the polymer is added dropwise into the acidic aqueous solution of sodium c...

Embodiment 1

[0024] 10 g of 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt and 5 g of methacrylic acid Dissolve acyloxyethyltrimethylammonium chloride in 50 g of aqueous solution, pass through nitrogen, add 0.1 g of potassium persulfate and sodium bisulfite (mass ratio is 1:1), at 40 o C was polymerized for 12 hours, precipitated with acetone, washed several times, and vacuum-dried to obtain a sulfonic acid type amphoteric cationic polymer; 1 g of sodium carboxymethyl cellulose and 0.5 g of sulfonic acid type amphoteric cationic polymer were dissolved in In 100 g of 0.01wt% hydrochloric acid aqueous solution, the acidic aqueous solution of sulfonic acid type amphoteric cationic polymer is added dropwise in the acidic aqueous solution of sodium carboxymethyl cellulose to carry out ionic crosslinking, through precipitation, washed with deionized water several times, in 40 o C dried for 16 hours to obtain sulfonic acid type amphoteric polyelectr...

Embodiment 2

[0027] 30 g of 3-[N,N-dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]ammonium]propane-1-sulfonic acid inner salt and 10 g of methacrylic acid Dissolve acyloxyethyltrimethylammonium chloride in 200 g of aqueous solution, blow nitrogen gas, add 1 g of potassium persulfate and sodium bisulfite (mass ratio: 1:1), at 60 o C was polymerized for 6 hours, precipitated with acetone, washed several times, and dried in vacuum to obtain a sulfonic acid type amphoteric cationic polymer; 3 g of sodium carboxymethyl cellulose and 2 g of sulfonic acid type amphoteric cationic polymer were dissolved in In the 0.1wt% hydrochloric acid aqueous solution of 500 g, the acidic aqueous solution of sulfonic acid type amphoteric cationic polymer is added dropwise in the acidic aqueous solution of carboxymethylcellulose sodium to carry out ion cross-linking, through precipitation, wash with deionized water several times, in 60 o C dried for 8 hours to obtain sulfonic acid type amphoteric polyelectrolyte na...

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Abstract

The invention discloses a preparation method of a sulfonic acid type amphoteric polyelectrolyte nanoparticle hybrid polyamide nanofiltration membrane. The preparation method comprises the steps: firstly, preparing a sulfonic acid type amphoteric cationic polymer by an aqueous phase free radical polymerization method, then preparing sulfonic acid type amphoteric polyelectrolyte nanoparticles by an ionic crosslinking method, adding the sulfonic acid type amphoteric polyelectrolyte nanoparticles into an aqueous phase monomer solution for preparing a polyamide membrane, and thus obtaining the sulfonic acid type amphoteric polyelectrolyte nanoparticle hybrid polyamide nanofiltration membrane by an interfacial polymerization method. With utilization of good hydrophilicity, contamination resistance and a unique nano pore structure of the nanoparticles, the water permeation flux and contamination resistance of the membrane are greatly improved while the high selectivity of the polyamide membrane on an inorganic salt is kept. Under an operating pressure of 0.6 MPa at the temperature of 25 DEG C, the interception rate of the nanofiltration membrane on divalent ions can reach up to 97%, the interception rate of the nanofiltration membrane on monovalent ions is less than 25%, and the water flux is generally higher than 50 L.m<-2>.h<-1>. Therefore, the prepared sulfonic acid type amphoteric polyelectrolyte nanoparticle hybrid polyamide nanofiltration membrane has high separation selectivity, water permeability and contamination resistance.

Description

technical field [0001] The invention belongs to the field of nanofiltration membrane separation, and in particular relates to a preparation method of a sulfonic acid type amphoteric polyelectrolyte nanoparticle hybrid polyamide nanofiltration membrane. Background technique [0002] Membrane separation technology has the characteristics of high efficiency, low energy consumption and wide application range, and has become an effective means for seawater desalination and sewage treatment. Common membrane separation technologies include microfiltration, ultrafiltration, nanofiltration, reverse osmosis, pervaporation, and membrane bioreactors. Among them, nanofiltration is a pressure-driven membrane separation process between ultrafiltration and reverse osmosis. It can not only separate different valent ions like reverse osmosis, but also remove ions with a molecular weight between 200 and 1000 Da like ultrafiltration. Between the organic matter or colloid. Although the researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D71/56B01D69/02B01D69/10B01D67/00C08F220/36C08F226/06
Inventor 计艳丽安全福秘一芳高从堦
Owner ZHEJIANG UNIV
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