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High-strength and high-toughness gel based on macromolecular cross-linking polymerization and its preparation method and application

A macromolecular cross-linking agent, a technology of cross-linking polymerization, applied in chemical instruments and methods, drilling compositions, general water supply saving, etc. High bulk viscosity, good mechanical properties, high viscosity effect

Active Publication Date: 2022-06-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor mechanical properties, prone to shear fracture, and poor suspension performance in aqueous solution that exist in the existing cross-linked granular gels. The high-strength and high-toughness gel and its preparation method prepare a double network with both chemical cross-linking and physical cross-linking, and a large number of branched chain structures are intertwined to form a physical entanglement network, thereby endowing the gel with excellent high-strength and high-toughness properties , and has good suspension performance in aqueous solution

Method used

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  • High-strength and high-toughness gel based on macromolecular cross-linking polymerization and its preparation method and application
  • High-strength and high-toughness gel based on macromolecular cross-linking polymerization and its preparation method and application
  • High-strength and high-toughness gel based on macromolecular cross-linking polymerization and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment A

[0034] Example A: Dissolve polyallylamine (molecular weight: 5000) and allyl glycidyl ether with a molar ratio of 1:0.1 in 100 parts of deionized water, adjust the mass fraction of the solute to be 1.17%, and prepare the prepared The reactants were reacted at 60°C for 6 hours in a reaction device equipped with a condenser, a temperature controller and a stirrer, and then dialyzed in deionized water for 7 days to prepare a multifunctional macromolecular crosslinking agent solution A.

Embodiment B

[0035] Example B: Dissolve polyallylamine (molecular weight: 5000) and allyl glycidyl ether with a molar ratio of 1:0.25 in 100 parts of deionized water, and adjust the mass fraction of the solute to be 1.48%. The reactants were reacted at 60° C. for 6 hours in a reaction device equipped with a condenser, a temperature controller and a stirrer, and then dialyzed in deionized water for 7 days to prepare a multifunctional crosslinking agent solution B.

Embodiment C

[0036]Embodiment C: the molar ratio is 1:0.75 polyethyleneimine (molecular weight is 5000) and allyl glycidyl ether are dissolved in 100 parts of deionized water, adjust the mass fraction of solute to be 2.44%, the prepared reaction The compound was reacted at 70 °C for 6 hours in a reaction device equipped with a condenser, a temperature controller and a stirrer, and then dialyzed in deionized water for 7 days to prepare a multifunctional crosslinking agent solution C.

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Abstract

The invention discloses a high-strength and high-toughness gel based on macromolecular cross-linking polymerization and its preparation method and application. It is obtained through in-situ cross-linking reaction according to the following raw material components: Sulfate, 0.02-0.04 parts of water-soluble amine compound, 0.01-0.1 part of macromolecular cross-linking agent solution, 160-500 parts of water. The gel provided by the invention has very good toughness and can be used as a profile control oil displacement agent in tertiary oil recovery.

Description

technical field [0001] The invention belongs to, but is not limited to, the technical field of oil displacement in oil exploitation, relates to a high-strength and high-toughness gel oil-displacing agent for improving oil recovery, and in particular relates to a high-strength and high-toughness gel polymer based on macromolecular cross-linking and its preparation . Background technique [0002] Oil is called the "blood of industry" and is a very valuable non-renewable resource, which is of great significance to the development of the national economy and is also an important strategic reserve resource. Therefore, improving crude oil recovery and developing oil extraction technology are important ways to ensure energy security. At present, many oil fields have entered the late stage of development, and have experienced the stage of tertiary oil recovery, resulting in serious heterogeneity. Traditionally, linear polymer molecules and their modifications have low elastic modu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F271/00C08F220/56C09K8/588
CPCC08F271/00C09K8/588C08F220/56Y02A20/204
Inventor 郑静曹振兴吴锦荣黄光速袁朝阳吴睿张瑶许虎
Owner SICHUAN UNIV