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Hyperbranched polymer based on carbon nanotube and preparation method thereof

A technology of hyperbranched polymers and carbon nanotubes, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve problems such as poor effects, and achieve broad application prospects, wide application range, and high repeatability

Active Publication Date: 2021-06-25
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing hyperbranched polymer oil displacement agents are usually spherical hyperbranched polymers, which are less effective when applied to heterogeneous reservoirs

Method used

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  • Hyperbranched polymer based on carbon nanotube and preparation method thereof
  • Hyperbranched polymer based on carbon nanotube and preparation method thereof
  • Hyperbranched polymer based on carbon nanotube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 8g of carbon nanotubes to a 500mL three-necked flask, then add 80g of concentrated nitric acid, stir in a 45°C water bath for 12 hours, filter and wash with suction to obtain carboxylated carbon nanotubes; add 7g of carboxylated carbon nanotubes to a 500mL three-necked flask tube, add 100g of hydrogen peroxide, continue to oxidize in a water bath at 45°C for 12 hours, filter with suction, wash, and dry to obtain hydroxylated carbon nanotubes;

[0032] Add 60g of diformamide and 6g of hydroxylated carbon nanotubes into a 500mL three-necked bottle, then add 60g of aminopropyltrimethoxysilane, and stir in a water bath at 45°C for 12 hours to ensure the hydroxylated carbon nanotubes and silane coupling agent. Fully react, after the reaction is finished, it is filtered, washed and dried;

[0033] In a water bath at 35°C, disperse 5g of carbon nanotubes modified by a silane coupling agent into a three-necked bottle containing 60g of diformamide, add 40g of methyl acrylate...

Embodiment 2

[0038] Add 8g of carbon nanotubes to a 500mL three-necked flask, then add 80g of concentrated nitric acid, stir in a 45°C water bath for 12 hours, filter and wash with suction to obtain carboxylated carbon nanotubes; add 7g of carboxylated carbon nanotubes to a 500mL three-necked flask tube, add 100g of hydrogen peroxide, continue to oxidize in a water bath at 45-50°C for 12 hours, suction filter, wash and dry to obtain hydroxylated carbon nanotubes;

[0039] Add 60g of diformamide and 6g of hydroxylated carbon nanotubes into a 500mL three-necked flask, then add 50g of aminopropyltriethoxysilane and 20g of aminopropyltrimethoxysilane, and stir in a water bath at 50°C for 12h to ensure that the hydroxylated carbon nanotubes Full reaction of carbon nanotubes and silane coupling agent;

[0040] At 40°C in a water bath, disperse 5g of carbon nanotubes modified by a silane coupling agent into a three-necked bottle containing 60g of diformamide, add 40g of methyl acrylate dropwise, ...

Embodiment 3

[0045] Add 8g of carbon nanotubes to a 500mL three-necked flask, then add 80g of concentrated nitric acid, stir in a water bath at 50°C for 12 hours, filter and wash with suction to obtain carboxylated carbon nanotubes; add 7g of carboxylated carbon nanotubes to a 500mL three-necked flask tube, add 100g of hydrogen peroxide, continue to oxidize in a water bath at 50°C for 12h, suction filter, wash, and dry to obtain hydroxylated carbon nanotubes;

[0046] Add 60g of diformamide and 6g of hydroxylated carbon nanotubes into a 500mL three-neck flask, then add 70g of aminopropyltriethoxysilane, and stir in a water bath at 50°C for 12h to ensure that the hydroxylated carbon nanotubes and silane coupling agent an adequate response;

[0047] In a water bath at 35°C, disperse 5g of carbon nanotubes modified by a silane coupling agent into a three-necked bottle containing 60g of diformamide, add 40g of methyl acrylate dropwise, stir in a sealed environment, and conduct Michael Additio...

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Abstract

The invention provides a preparation method of a hyperbranched polymer based on a carbon nanotube, wherein the preparation method comprises the following steps: step 1, taking a hydroxylated carbon nanotube, and grafting a silane coupling agent on the surface of the hydroxylated carbon nanotube, wherein the silane coupling agent containing an amino-terminated group; step 2, carrying out at least one time of hybridization treatment on the product in the step 1, wherein the hybridization treatment process comprises the following steps of sequentially grafting methyl acrylate and organic diamine on the product in the step 1; step 3, taking the product in the step 2, and carrying out end capping on the product by adopting maleic anhydride; and step 4, taking 0.1 part by weight of the product obtained in the step 3, and carrying out water-phase free radical copolymerization on the product and 20-40 parts by weight of acrylamide. According to the hyperbranched polymer disclosed by the invention, a polymerization main body is a one-dimensional carbon nanotube, and compared with a traditional hyperbranched polymer, the hyperbranched polymer can pass through a pore throat with a smaller size; and meanwhile, the synthesis method is simple, high in repeatability, energy-saving and environment-friendly in process and high in industrialization.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a hyperbranched polymer based on carbon nanotubes and a preparation method thereof. Background technique [0002] The heterogeneity of continental sedimentary oilfields is generally stronger than that of marine sedimentary oilfields, so the former is more difficult to recover than the latter, and most oilfields in my country are continental sedimentary oilfields, so enhanced oil recovery is a necessary means to enhance oil recovery. Enhanced oil recovery, also known as tertiary oil recovery, refers to natural gas oil recovery, chemical oil recovery, thermal oil recovery and microbial oil recovery. Among them, chemical oil recovery is also called chemical flooding. As an efficient means of recovery, it mainly includes surfactant flooding, polymer flooding, foam flooding, alkali flooding and multi-component flooding. The basic principle of chemical flooding i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/56C09K8/588
CPCC08F292/00C09K8/588C08F220/56
Inventor 芶瑞蒲万芬刘锐张涛
Owner SOUTHWEST PETROLEUM UNIV
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