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Acid modified starch-graft-polyacrylamide water-in-water emulsion and synthetic method thereof

An acid-modified starch and polyacrylamide technology, which is applied in the field of acid-modified starch grafted polyacrylamide water-in-water emulsion and its synthesis, can solve the problems of expensive starch, limited application, low PAM solid content, etc. Branch efficiency and yield, product cost-effective, good solubility

Inactive Publication Date: 2010-02-10
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditionally used PAM is generally aqueous solution, powder or water-in-oil emulsion, and they all have obvious defects in the synthesis method and use: the solid content of aqueous solution PAM is relatively low, and the relative molecular weight is not easy to control, and the cost is high; the production of powdery PAM Special drying equipment is required, and high-speed stirring and heating are required during use, which is time-consuming and laborious; water-in-oil emulsion PAM is dispersed in oil, causing pollution to the water system and the environment after use
Therefore, the defects of the traditional PAM itself make its application in petroleum, water treatment, papermaking and other industries subject to certain restrictions.
For example, the preparation method of starch-grafted polyacrylamide water-in-oil emulsion has the disadvantage of causing secondary pollution to the environment
For example, polyacrylamide water-in-water emulsion and its preparation method only use acrylamide as a monomer, which is more expensive than starch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A water-in-water emulsion grafted with acid-modified starch polyacrylamide and a synthesis method thereof. The synthesis steps are as follows:

[0027] The first step: mix nitric acid: cornstarch: deionized water in a mass ratio of 1: (1.5-2): (3-4) evenly, and stir in a reactor at 60-70°C for 5-6 hours. Cooling; then add alkali solution to the reaction kettle while stirring until PH = 7, and then obtain acid-modified starch after drying;

[0028] The second step: sodium lauryl sulfate by mass ratio: ammonium sulfate: polyacryloxyethyltrimethylammonium chloride: acid-modified starch: deionized water is 1: (5.5~6): (9~ 10): (4~5): (43~50) Mix evenly and place in another reaction kettle, pass nitrogen gas for 30~40 minutes at room temperature, stir and keep warm in the reaction kettle at 80~90°C 1.2-1.5 hours, and naturally cooled to 60-70°C to obtain acid-modified starch emulsion;

[0029] The third step: by cerium ammonium nitrate: the mass ratio of sodium lauryl sul...

Embodiment 2

[0033] A water-in-water emulsion grafted with acid-modified starch polyacrylamide and a synthesis method thereof. The synthesis steps are as follows:

[0034] The first step: mix sulfuric acid: cornstarch: deionized water in a mass ratio of 1: (2-3): (2-3) evenly, and stir in a reactor at 50-60°C for 3-5 hours, Cooling; then add alkali solution to the reaction kettle while stirring until PH = 7, and then obtain acid-modified starch after drying;

[0035] The second step: cetyltrimethylammonium bromide by mass ratio: potassium sulfate: polyacrylamidopropyl dimethyl benzyl ammonium chloride: acid-modified starch: deionized water is 1: (5~ 5.5): (8~9): (3~4): (37~43) Mix evenly and place in another reaction kettle, pass nitrogen gas at room temperature for 20~30 minutes, and put it at 70~80°C Stir and keep warm in the reaction kettle for 0.8 to 1.2 hours, and naturally cool to 50 to 60°C to obtain acid-modified starch emulsion;

[0036] The third step: by potassium permanganat...

Embodiment 3

[0040] A water-in-water emulsion grafted with acid-modified starch polyacrylamide and a synthesis method thereof. The synthesis steps are as follows:

[0041] The first step: mix hydrochloric acid: cornstarch: deionized water in a mass ratio of 1: (3-4): (1.5-2) evenly, and stir in a reactor at 40-50°C for 2-3 hours. Cooling; then add alkali solution to the reaction kettle while stirring until PH = 7, and then obtain acid-modified starch after drying;

[0042] Second step: sodium dodecylbenzenesulfonate by mass ratio: disodium hydrogen phosphate: polyethylene glycol: acid-modified starch: deionized water is 1: (4~5.5): (7~8): ( 2~3): (35~37) mix evenly and place in another reaction kettle, pass nitrogen gas at room temperature for 30~40 minutes, stir and keep warm in the reaction kettle at 70~80°C for 0.5~0.8 hours , and naturally cooled to 35-50°C to obtain acid-modified starch emulsion;

[0043] The third step: press hydrogen peroxide: the mass ratio of sodium dodecylbenz...

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Abstract

The invention relates to acid modified starch-graft-polyacrylamide water-in-water emulsion and a synthetic method thereof. The synthetic method comprises the following steps: firstly, mixing inorganicacid, corn starch and deionized water in a mass ratio of 1: (1.5-4):(1.5-4); stirring the mixture in a reaction kettle at 40-70 DEG C for 2-6 hours and cooling; adding an alkaline solution to the reaction kettle until a PH value equals to 7; drying to obtain acid modified starch; mixing an auxiliary stabilizing agent, inorganic salt, a stabilizing agent, the acid modified starch and deionized water in a mass ratio of 1: (4-6): (7-10): (2-5): (35-50) in another reaction kettle; introducing nitrogen; stirring at 70-90 DEG C; keeping temperature for 0.5-1.5 hours; naturally cooling to 35-70 DEGC; adding an evocating agent; stirring at 35-70 DEG C for 5-20 minutes; finally, adding acrylamide monomer, and stirring at 35-70 DEG C for 3-6 hours; and cooling to obtain acid modified starch-graft-polyacrylamide water-in-water emulsion. The invention has the advantages of no environmental secondary pollution, low cost, high grafting efficiency and yield rate, and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesis of polyacrylamide water-in-water emulsion. The invention relates to an acid-modified starch grafted polyacrylamide water-in-water emulsion and a synthesis method thereof. Background technique [0002] The main application field of polyacrylamide (PAM) in the United States and Western Europe is water treatment, and the largest application field in Japan is the paper industry. The application of PAM in my country's three major industries of petroleum, water treatment and papermaking is particularly important. [0003] Traditionally used PAM is generally aqueous solution, powder or water-in-oil emulsion, and they all have obvious defects in the synthesis method and use: the solid content of aqueous solution PAM is relatively low, and the relative molecular weight is not easy to control, and the cost is high; the production of powdery PAM Special drying equipment is required, and high-speed stirri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F2/22
Inventor 王光华康巍李文兵刘汉斌黄婷婷梁玉河
Owner WUHAN UNIV OF SCI & TECH
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