Preparation method of amphoteric comb-shape polyacrylamide by synthesis of quaternary ammonium salt functional monomer

A technology of functional monomer and polyacrylamide is applied in the field of compound synthesis and preparation to achieve the effects of uniform reaction temperature distribution, high viscoelasticity and easy heat transfer

Active Publication Date: 2012-05-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method for synthesizing amphoteric comb-type polyacrylamide from quaternary ammonium salt functional monomer, so as to overcome the defects of existing polyacrylamide

Method used

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  • Preparation method of amphoteric comb-shape polyacrylamide by synthesis of quaternary ammonium salt functional monomer
  • Preparation method of amphoteric comb-shape polyacrylamide by synthesis of quaternary ammonium salt functional monomer
  • Preparation method of amphoteric comb-shape polyacrylamide by synthesis of quaternary ammonium salt functional monomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 100ml of acetone to a 250ml four-neck flask, then add equimolar dimethylaminoethyl methacrylate (DM) 7.85g, 1-bromododecane 12.45g, blow nitrogen for 0.5 hours, add 0.02g of Hydroquinone, heated to 35 ° C for 7 hours to obtain a uniform and transparent solution;

[0033] The transparent solution was evaporated at low temperature to remove acetone, then washed with petroleum ether until clarified, dried in a vacuum oven at 30°C for 24 hours, then taken out and placed in a vacuum oven to obtain quaternary ammonium salt I, whose infrared spectrum is shown in figure 1 , see the NMR spectrum figure 2 .

Embodiment 2

[0035] Add 100ml of acetone to a 250ml four-necked flask, then add 7.85g of dimethylaminoethyl methacrylate (DM) in equimolarity, 8.25g of 1-bromohexane, blow nitrogen for 0.5 hours, and add 0.02g of p-benzene Diphenol, heated to 35 ° C for 7 hours to obtain a uniform and transparent solution;

[0036] The transparent solution was evaporated at low temperature to remove acetone, then washed with petroleum ether until clear, dried in a vacuum oven at 30°C for 24 hours, then taken out and put into a vacuum oven to obtain quaternary ammonium salt II.

Embodiment 3

[0038] Add 100ml of acetone to a 250ml four-neck flask, then add equimolar dimethylaminoethyl methacrylate (DM) 7.85g, 1-bromohexadecane 15.25g, nitrogen exhaust oxygen for 0.5 hours, add 0.02g Hydroquinone, heated to 35 ° C for 7 hours to obtain a uniform and transparent solution;

[0039] The transparent solution was evaporated at low temperature to remove acetone, then washed with petroleum ether until clear, dried in a vacuum oven at 30°C for 24 hours, then taken out and put into a vacuum drying oven to obtain quaternary ammonium salt III.

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Abstract

The invention relates to a preparation method of amphoteric comb-shape polyacrylamide by the synthesis of a quaternary ammonium salt functional monomer, comprising the following steps of: dissolving dimethylaminoethyl methacrylate and 1-n alkyl bromide in equimolar ratio with a certain amount of hydroquinones in acetone, and preparing quaternary ammonium salt under the protection of nitrogen; dissolving quaternary ammonium salt, acrylamide and acrylic acid in an ammonium sulfate dispersive aqueous solution, adding a certain amount of span 80, stirring, heating up to the initiation temperature, adding dropwisely ammonium persulfate, and initiating polymerization under the protection of nitrogen so as to finally obtain quaternary ammonium salt functional monomer synthesized amphoteric comb-shape polyacrylamide. Through the synthesis of the quaternary ammonium salt functional monomer, the obtained novel polyacrylamide has amphoterism and a long-chain comb-shaped structure, and is endowedwith high viscoelasticity, anti-shearing performance, temperature resistance and pH resistance. The attached graph is the infrared spectra of the synthesized quaternary ammonium salt 1 in the embodiment 1.

Description

technical field [0001] The invention relates to the technical field of compound synthesis and its preparation, in particular to a preparation method for synthesizing amphoteric comb polyacrylamide from a quaternary ammonium salt functional monomer. Background technique [0002] Polyacrylamide, English is Polyacrylamide, referred to as PAM, because its structural unit contains amide groups, which are easy to form hydrogen bonds, so that it has good water solubility. Polyacrylamide is easy to obtain a variety of modified products with branched chain or network structure through grafting or crosslinking, and can be used as an important flocculant, thickener, drag reducer, mud treatment agent, surfactant, and soil conditioner , Soil and water conservation agent, seed coating agent, paper strengthening agent and widely used in petroleum exploration, water treatment, textile, papermaking, mineral processing, medicine, agriculture and other industries, so it is called "all kinds of...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F220/34C08F2/30
Inventor 庄启昕傅宇苑永亮王丹胡琨韩哲文
Owner EAST CHINA UNIV OF SCI & TECH
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