Hydrophobic association zwitterionic starch containing adamantyl group and preparation method thereof

An adamantyl and zwitterion technology is applied in the field of functional polymers to achieve the effect of enhancing the reverse polyelectrolyte effect, improving the viscosity increasing ability and improving the salt resistance performance.

Inactive Publication Date: 2017-01-25
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the relevant properties and processes of hydrophobically associated starches as oilfield additives have been further improved and improved, but there are few reports on the preparation of hydrophobically associated zwitterionic starches using adamantyl groups as hydrophobic groups

Method used

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  • Hydrophobic association zwitterionic starch containing adamantyl group and preparation method thereof
  • Hydrophobic association zwitterionic starch containing adamantyl group and preparation method thereof
  • Hydrophobic association zwitterionic starch containing adamantyl group and preparation method thereof

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preparation example Construction

[0025] This embodiment also provides a method for preparing adamantyl-containing hydrophobically associated zwitterionic starch, the method comprising the following steps:

[0026] Mix starch with water to prepare starch milk with a concentration of 10.0wt%-20.0wt%, heat the starch milk in a water bath at 25-96°C, add α-amylase to the heated starch milk to obtain enzymatically degraded starch Lotion;

[0027] Add the adamantyl hydrophobic monomer and distilled water in sequence in the reactor, and pass inert gas for 30-60 minutes under the condition of stirring;

[0028] Add three monomers of alkenyl amide, alkenyl carboxylate and alkenyl quaternary ammonium salt into the reactor, stir evenly to form a mixed solution, and add NaOH solution to the mixed solution to make the pH of the mixed solution 6.5 to 8.5 , adding distilled water to the mixed solution so that the total mass percent concentration of the reaction raw materials in the reactor in the reaction system is 5.0% to...

Embodiment 1

[0040] Add 30.0 g of cornstarch into a beaker filled with 150 mL of distilled water, stir well to form a paste, pour it into a reactor, and heat it in a water bath at 25°C. Under stirring conditions, 0.15 g of α-amylase was added, and the temperature was maintained for 3.0 hours. The temperature of the oil bath was raised to 100° C., and inactivation was carried out for 3.0 hours to obtain an enzyme-degraded starch emulsion for later use.

[0041] Add 1.5g of adamantyl acrylate and 150mL of distilled water in turn into a reactor equipped with a stirrer, a thermometer, an air guide tube and a condenser, and nitrogen for 30 minutes under stirring conditions.

[0042] Add 60g of acrylamide, 30g of sodium acrylate and 15g of dimethyl diallyl ammonium chloride into the reactor, stir evenly, adjust the pH value of the system to 7.5 with a NaOH solution with a concentration of 5.0% by mass, Add 300 mL of distilled water.

[0043] Add 20.0g sodium dodecylsulfonate in the reactor, ad...

Embodiment 2

[0047] Add 40.0 g of cornstarch into a beaker filled with 400 mL of distilled water, stir well to form a paste, pour it into a reactor, and heat it in a water bath at 25°C. Under the condition of stirring, 0.2 g of α-amylase was added, and the temperature was maintained for 6.0 hours. The temperature of the oil bath was raised to 120° C., and inactivation was carried out for 0.5 hour to obtain an enzyme-degraded starch emulsion for later use.

[0048] Add 1.0 g of adamantyl methacrylate and 100 mL of distilled water sequentially into a reactor equipped with a stirrer, a thermometer, an air guide tube and a condenser, and nitrogen for 60 min under stirring conditions.

[0049] Add 40g of acrylamide, 20g of sodium acrylate and 10g of dimethyl diallyl ammonium chloride into the reactor, stir evenly, and adjust the pH value of the system to 8.0 with a NaOH solution with a concentration of 5.0% by mass. Supplement with 388 mL of distilled water.

[0050] Add 30.0g sodium octadecy...

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Abstract

The invention relates to adamantyl contained hydrophobic association zwitter-ion starch and a preparation method thereof. The zwitter-ion starch is prepared from raw materials of starch, adamantyl hydrophobic monomer, alkenyl amide, alkenyl carboxylate and alkenyl quaternary ammonium salt. According to the invention, the adamantyl hydrophobic monomer is introduced to polymer molecules, so that the modified starch has a hydrophobic association property and the viscosity increasing capacity of the starch is increased. As an anion group and a cation group are introduced in the starch molecule chain simultaneously, the anti-polyelectrolyte effect of the solution is enhanced and the salt resistance is improved.

Description

technical field [0001] The invention belongs to the field of functional polymers, in particular to a hydrophobic association zwitterionic starch containing adamantyl groups and a preparation method thereof. Background technique [0002] As a natural polymer compound, starch has the advantages of wide sources, low cost, non-toxic, harmless, biodegradable and recyclable, and meets the requirements of modern human beings for environmental protection. Starch molecules contain a large number of hydroxyl groups, which have high reactivity, and can undergo reactions such as grafting, esterification, etherification, oxidation, and crosslinking, so that different types of modified starches with various properties and special functions can be prepared according to actual needs. starch products. In the field of oil and gas development, modified starches have been widely used as drilling fluid fluid loss control agents, flocculants, water plugging and profile control agents, demulsifie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/18C08F220/56C08F220/06C08F226/02C08F220/34
Inventor 苏俊霖蒲晓林罗霄李之军周素林
Owner SOUTHWEST PETROLEUM UNIV
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