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Preparation method and application of cross-linked polyelectrolyte-surfactant composite

A surfactant and polyelectrolyte technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of water permeability reduction, achieve improved stability, low production cost, and simple preparation process Effect

Active Publication Date: 2017-03-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is reported in the literature that the cationic quaternary ammonium salt and polyacrylic acid are deposited on the poly(acrylic acid-b-acrylonitrile) base film by LBL (J. Appl. Polym. Sci., 2008, 110: 3234-3241), and It is used in ultrafiltration membrane separation technology, and it is found that as the number of deposition layers increases, the water permeability decreases

Method used

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Examples

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Effect test

preparation example Construction

[0019] The preparation method of the cross-linked poly(methacryloyloxyethyltrimethylammonium chloride-co-hydroxyalkyl acrylate)-sulfonic acid type anionic surfactant complex comprises the following steps:

[0020] 1) Make methacryloyloxyethyltrimethylammonium chloride monomer and hydroxyalkyl acrylate monomer into an aqueous solution with a mass percentage concentration of 10-30 wt%, pass nitrogen gas into it, and add a mass percentage concentration of 1-3 wt% water-soluble oxidation-reduction initiator, using solution polymerization method, after polymerization at 30-50 ° C for 5-24 h, precipitated with acetone, and washed several times to obtain poly(methacryloyloxyethyl trimethyl ammonium chloride-co-hydroxyalkyl acrylate) copolymer, after vacuum drying for subsequent use;

[0021]2) Add poly(methacryloyloxyethyltrimethylammonium chloride-co-hydroxyalkyl acrylate) copolymer into deionized water, stir at 20~60°C for 3~12 h, wait until completely dissolved, Adjust the pH of ...

Embodiment 1

[0035] The methacryloyloxyethyltrimethylammonium chloride monomer and the 2-hydroxyethyl acrylate monomer are in a mass ratio of 14:1 to form an aqueous solution with a mass percentage concentration of 30 wt%, and nitrogen gas is passed into it. A water-soluble oxidation-reduction initiator with a mass percentage concentration of 1 wt% was added, and the solution polymerization method was used to polymerize at 40 °C for 8 h, precipitated with acetone, and washed several times to obtain poly(methacryloyloxyethyltris Methylammonium chloride-co-acrylic acid-2-hydroxyethyl ester) copolymer, dried in vacuum for later use. Take 0.99 g of poly(methacryloyloxyethyltrimethylammonium chloride-co-acrylic acid-2-hydroxyethyl ester) copolymer with a copolymer mass ratio of 14:1 and add it to 500 g of deionized water at 30 °C Stir for 4 hours to dissolve completely, adjust the pH of the solution to 4, and obtain an aqueous solution of poly(methacryloyloxyethyltrimethylammonium chloride-co-a...

Embodiment 2

[0037] The methacryloyloxyethyltrimethylammonium chloride monomer and the 2-hydroxyethyl acrylate monomer are in a mass ratio of 1:1 to form an aqueous solution with a mass percentage concentration of 10 wt%, and nitrogen gas is passed into it. A water-soluble oxidation-reduction initiator with a mass percentage concentration of 1 wt% was added, and the solution polymerization method was used to polymerize at 40 °C for 5 h, precipitated with acetone, and washed several times to obtain poly(methacryloyloxyethyltris Methylammonium chloride-co-acrylic acid-2-hydroxyethyl ester) copolymer, dried in vacuum for later use. Take 0.75 g of poly(methacryloyloxyethyltrimethylammonium chloride-co-acrylate-2-hydroxyethyl ester) copolymer with a mass ratio of 1:1 to 500 g of deionized water, at 30°C Stir for 4 h to completely dissolve, adjust the pH of the solution to 9, and obtain an aqueous solution of poly(methacryloyloxyethyltrimethylammonium chloride-co-acrylate-2-hydroxyethyl ester) c...

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Abstract

The invention discloses a preparation method and an application of a crosslinked-type polyelectrolyte-surfactant composition. According to the invention, a poly(methylacryloyloxyethyl ammonium chloride-hydroxyalkyl acrylate) copolymer is prepared with a free radical polymerization manner. The polyelectrolyte-surfactant composition is prepared with a solution titration complexation manner. The polyelectrolyte-surfactant composition and a crosslinking agent are dissolved in an organic solvent together; and the crosslinked-type polyelectrolyte-surfactant composition membrane is prepared with an in-situ crosslinking manner. With an ionic crosslinking structure inside the molecules of the crosslinked-type polyelectrolyte-surfactant composition, the stability of the composition structure can be effectively maintained. With the crosslinking effect of the crosslinking agent between molecular chains, excessive swelling of the composition membrane in an alcohol / water feed solution can be effectively inhibited. Through regulating the copolymerization ratio of the copolymer and the type of the crosslinking agent, a membrane structure can be effectively regulated. The preparation method of the alcohol-penetration-priority membrane is simple and feasible, and has low cost and a good industrial application prospect.

Description

technical field [0001] The invention belongs to the field of polymer material preparation and membrane separation, and in particular relates to a preparation method and application of a cross-linked polyelectrolyte-surfactant composite. Background technique [0002] Pervaporation (PV) is an energy-saving and efficient membrane separation technology, which has obvious advantages in dehydration of organic matter, recovery of trace organic matter in water, and separation of organic mixture systems. Applying PV separation technology to biofermentation to produce alcohol biofuels can significantly improve efficiency, reduce energy consumption and reduce pollution. Membrane materials are the core of membrane separation technology research, and the study of alcohol-preferred membrane materials with excellent separation performance is crucial to promote the development of membrane biofuels. At present, the preferred alcohol-permeable membrane materials are mainly silicon-containing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/40B01D67/00B01D69/12
Inventor 安全福张平郑沛尧
Owner ZHEJIANG UNIV
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